Fisheries - Science topic

Although global catches have remained relatively stable over the past 20 years, there is still a lack of reliable information on fishing capacity and fishing effort needed to assess the sustainability and efficiency of the global fleet (Bell, J.D., Watson, R.A. and Ye , Y. (2017) Global fishing capacity and fishing effort from 1950–2012. Fish and Fisheries, 18(3), 489–505). However, there is still no unified methodology for assessing fishing power and fishing effort, just as there are no established definitions of these concepts. To be comprehensive, any measure must cover all fishing operations, from coastal fisheries without vessels to fishing expeditions involving tens or hundreds of large modern vessels (Bell et al. 2017). Thus, given the widespread recognition that overfishing capacity is a serious environmental and economic problem, there are still no generally accepted empirical methods for assessing fishing capacity (Asche, 2007) and, as a result, no methods for assessing the environmental impacts of fisheries. We are working on solving this problem and will soon publish our vision of fishing theory 2.0.

Coastal upwelling ecosystems, such as along the west coast of the United States, are some of the most productive ecosystems in the world and support many of the world's most important fisheries. The uppermost zone, from the sea surface to a depth of 200 m (656 ft), is called the epipelagic or photic zone. The large amount of available sunlight makes this the most productive zone of the ocean. Water that rises to the surface as a result of upwelling is typically colder and is rich in nutrients. These nutrients “fertilize” surface waters, meaning that these surface waters often have high biological productivity. The shelf is the area of the seabed around a large mass where the sea is relatively shallow compared with the open ocean. The continental shelf and the continental crust are part of each other geologically. Generally, it is the most productive part of the ocean. In general, the major fisheries of the world occur in two main areas, the areas of wide continental shelf and upwelling areas. The areas of upwelling include Peru, South Africa, North West Africa, California and south west coast of India. Continental Shelf: This area is characterized by a gentle slope and has a relatively stable environment, making it an ideal habitat for many fish species that are commercially valuable. Fishing and aquaculture activities are commonly carried out on the continental shelf. The Atlantic oyster, also known as Eastern oyster is tear-shaped and flatter than the Pacific oyster, with a heavy salty taste. Two of the better-known Atlantic oyster varieties are from Blue Point in Long Island New York and Wellfleet oysters which grow in Cape Cod, Massachusetts. It depends on the farm's proximity to the ocean and your proximity to the farm. Generally speaking, Pacific oysters will have a pronounced cucumber or vegetal undertone. Atlantics are more prone to take on earthy, mushroomy, and molluscy notes.

Good morning sir, To attract students to your unique MBA and BBA programs in Fisheries Enterprises Management in India, you may want to focus on clearly articulating the distinctiveness of your courses and make it known to all schools/colleges upto Standard X and XII, considering that is where the students make a choice to enter into BBA/MBA. todays youth is more into social media so utilizing targeted digital marketing to reach a broad audience can be a great idea, apart of that, establishing partnerships with docks and wellknown fishery based companies / agencies to enhance practical exposure, organising visits to such kind of places and using those pictures for advertising your courses. Offering scholarships and financial aid to deserving candidates, and making that known to your prospective crowd, and showcasing successful alumni in the field. Engage with schools, participate in relevant events, and optimize your university website for more visibility. Continuous improvement based on feedback will surely help you to grow more. All the best! Nagajothi Velayuthapillai

Water quality considerations and criteria for high-density fish culture with supplemental oxygen

J Colt K Orwicz G Bouck

Publication Date

1991

Notes

ISBN 0-913235-72-5

Publication Title

Fisheries Bioengineering Symposium: American Fisheries Society Symposium 10

Start Page

372

End Page

385

Editors

Colt J;White RJ;

Publication Place

Bethesda, MD

Publisher

American Fisheries Society

Abstract

The use of pure oxygen can significantly increase the carrying capacity of a culture system both by supporting increased fish density and by allowing reuse of the water. The minimum allowable dissolved oxygen level is well defined, but considerably less information is available on the maximum allowable dissolved oxygen level. The maximum allowable dissolved oxygen level appears to be influenced primarily by (1) oxygen toxicity, (2) physiological and developmental problems caused by high or rapidly fluctuating dissolved oxygen levels, (3) gas bubble trauma, and (4) biological effects of increased loading and density. Consideration must be given to the effects of oxygen supplementation on other water quality variables such as total gas pressure and carbon dioxide levels. Dissolved gas criteria are suggested for both coldwater and warmwater conditions

Dear Doctor

Go To

"Main opportunities identified are: 1) increased transparency of fishing activity and reduced impact on the environment, thereby improving the public image of the sector; 2) early warning, forecasting and spatial planning systems can help in the planning activities considering trade-off between them; 3) accelerated and increased data acquisition and coverage for stock assessments, sustainability indicators evaluation and other management data needs; 4) increased economic sustainability of the fishing industry, by reducing operational costs; and, 5) the modernisation of fisheries and its subsequent attractiveness to the younger population.

Main obstacles identified are: 1) industry trust and reluctance; 2) initial costs and lack of expertise; 3) legal and bureaucratic uncertainty.

AI can increase efficiency and reduce costs for industry, but there are important barriers such as developing and installation costs, the scarcity of standards, and a lack of multidisciplinary expertise (biological, AI and legal) to develop fit-for-purpose systems.

Although some AI approaches are considered black boxes (e.g. Artificial Neural Networks (ANNs)), there are other suitable AI methods to understand the basis, processes and model forecasts and their uncertainty (e.g. Bayesian Networks (BNs).

Policy recommendations relevant to EU decision-making to achieve a better use of AI systems in the fisheries sector are: 1) add AI references to fisheries legislation and AIA proposal; 2) regulate the role of technological companies; 3) promote multidisciplinary academia and professionals; 4) regulate the role of AI technological providers, ensuring some degree of experience in fisheries to prevent untrustworthy and not-fit-for-purpose AI systems; 5) develop AI good practices guidelinesfor fisheries; 6) create incentives for the development and use of fit-for-purpose fisheries AI systems; 7) improve and promote public and private data sharing; and, 8) promote awareness and collaboration with fisheries sector."

Dear Doctor

Go To

"The fishing industry contributes to the national economy and has a high risk of being traded because it has a long shipping time, limited time to consume, and the amount traded varies depending on the season. This risk can reduce the potential profit of players in the fishing industry. To reduce this risk and maximize added value, blockchain technology is used to change the supply chain of the fishing industry. Blockchain technology is a ledger database that is distributed to record transactions among parties that can be verified and permanently.

Blockchain is a promising technology in providing a transparent fish product supply chain, but many obstacles and challenges still hinder its popularity in the fishery supply chain. However, blockchain with its main characteristics: decentralization, anonymity, transparency, and traceability, can change the traditional fishing industry for the better. Blockchain can be combined with other emerging technologies (big data, robotics, IoT, RFID, NFC, etc.), for higher automation of the fishery supply chain, resulting in full transparency and tracking. Blockchain also has economic benefits for all users because it can make production more efficiently at lower costs."

Attracting students to niche programs like MBA and BBA in Fisheries Enterprises Management can be challenging, but with strategic marketing and targeted outreach, you can generate interest and increase enrollment.

Here are some steps to consider:

Remember that consistency is key in your efforts to attract students. Continuous engagement and targeted marketing can gradually increase the visibility and desirability of your MBA and BBA programs in Fisheries Enterprises Management in India.

Fisheries Marketing;

Fisheries Value Chain Analysis

Processing and Value Addition

HR manager, marketing executives and Managerial roles in seafood processing industries, export companies, hatcheries, farms, fish feed manufacturing units, dry fish value chain, integrated culture units, seafood restaurants, hypermarkets etc.

You can find annual data from the Food and Agriculture Organization of the United Nations for the time period of 1990-2020 by following these steps:

In summary, you can find annual data from the Food and Agriculture Organization of the United Nations for the time period of 1990-2020 by going to the FAOSTAT website, clicking on the “Data” tab, selecting the data you want to download, selecting the time period you want to download (1990-2020), and clicking on the “Download” button.

@all Congratulations on your decision to apply for the Marie Skłodowska-Curie Actions (MSCA) Fellowship! It's evident that you are deeply passionate and committed to your proposed research on fisheries governance, and I'm sure that your enthusiasm and dedication will shine through in your application.

As experienced colleagues in the field, we understand the importance of such prestigious fellowships and are more than willing to offer our guidance and support to help you create a compelling and competitive application. Here are some pieces of advice and suggestions that may assist you in the preparation process:

Wishing you the best of luck with your application! The MSCA Fellowship is an exciting opportunity, and we have no doubt that your commitment and dedication will make a significant impression on the evaluators.

Best regards,

Thanks a lots your suggestions, however I can not be removed from the present working area 'cause I must go to the special hospital for my tumors, wish me luck please.

Sincerely,

Yusuke

Hi, you might wish to check out https://www.sealifebase.se/search.php to look for literature on crab sizes and contact authors, if need be, to share their raw data. For sharing lots of data it is useful to offer co-authorship for publications.

As a fisheries graduate ,i personally think sir ,

To prepare an outcome-based education for Fisheries Enterprises management MBA:

1. It can Define desired outcomes.

2. It can Develop learning outcomes.

3. It can help Design the curriculum.

4. It can Align assessments.

5. It can Incorporate experiential learning.

6. It can Foster critical thinking.

7. It can Continuously evaluate and improve.

i hope this information will be useful sir may be not fully but partially sir ....

Thanks and regards,

Harshita Singh

It's very risky strategy to write an article with any AI solutions. You should use it for research-purpose only. Good apps that refer to current sources are e.g., Perplexity and Elicit. Any sentence wrote by the AI is highly detectable (e.q., by Originality AI).

@all Artificial intelligence (AI) is playing a significant role in enhancing and optimizing various aspects of fisheries and aquaculture. Here are some key areas where AI is making an impact:

It's important to note that while AI brings numerous benefits, its implementation should be accompanied by appropriate data privacy, ethical considerations, and regulatory frameworks to ensure responsible and sustainable use in fisheries and aquaculture.

Nagajothi Velayuthapillai Inferential statistics tools that are commonly used in Fisheries Marketing Problems include hypothesis testing, confidence intervals, regression analysis, and analysis of variance (ANOVA).

The scope for MBA in Fisheries Enterprises Management in the international scenario is quite promising. With the increasing global demand for seafood and the growing significance of sustainable fishing practices, there is a need for skilled professionals who can efficiently manage fisheries enterprises on an international scale. Graduates with an MBA in Fisheries Enterprises Management can explore diverse managerial job opportunities such as Fisheries Operations Manager, International Sales Manager for seafood products, Sustainable Fisheries Analyst, Supply Chain Manager, Aquaculture Project Manager, Fisheries Policy Consultant, and Research and Development Manager for fisheries-related innovations. These roles require a comprehensive understanding of the global fisheries industry, proficiency in strategic planning, market analysis, sustainability practices, and strong leadership skills to navigate the complexities of international markets and contribute to the sustainable growth and profitability of fisheries enterprises worldwide.

Navigating through the vast ocean of Scopus indexed journals, one can find several esteemed platforms to publish research on fisheries marketing in India. Among the treasure trove of options, some remarkable titles emerge like the "Journal of Aquaculture in the Tropics," where the rhythmic tides of marketing strategies in India's fisheries industry find their scholarly home. For those seeking a more specific channel, the "Indian Journal of Fisheries" stands tall, embracing the multidimensional facets of fisheries marketing within the Indian context. Moreover, the "Journal of Agriculture, Food Systems, and Community Development" opens its pages to illuminate the intricate interplay between fisheries marketing and the diverse communities it impacts. Lastly, casting our nets wider, the "International Journal of Fisheries and Aquatic Studies" captures the essence of fisheries marketing, spanning the globe while shedding light on India's contributions to this field. Within these prestigious journals, scholars and enthusiasts alike can embark on an exciting voyage, sharing their research findings and insights, creating ripples of knowledge that resonate throughout the maritime domain of fisheries marketing in India.

Dear Nagajothi Velayuthapillai

The framework could include various elements such as the different stakeholders involved in the marketing of fisheries products, the market forces that affect pricing and distribution, the marketing strategies used by industry players, and the regulatory policies that shape the industry.

I hope this helps.

1291 I068 0970-6011 Indian Journal of Fisheries 6.59

2299 M021 0308-597X Marine Policy 10.32

2470 N065 0275-5947 North American Journal of Fisheries Management 7.70

Nagajothi Velayuthapillai It is difficult to give an online answer to this question without looking at the provisions in the Policy.

@all Fisheries policies of the Government of India: The Government of India has implemented several fisheries policies to regulate and promote sustainable development in the sector. Some key policies include:

a. National Fisheries Policy: This policy aims to enhance fish production, increase income for fisherfolk, promote aquaculture, ensure sustainable resource utilization, and improve fisheries infrastructure and post-harvest facilities.

b. National Policy on Marine Fisheries: It focuses on the sustainable development of marine fisheries, conservation of marine resources, development of deep-sea fishing, and welfare measures for fishermen.

c. National Policy for Inland Fisheries and Aquaculture: This policy promotes scientific aquaculture practices, conserves and rejuvenates water bodies, enhances productivity, and provides livelihood opportunities for rural communities through inland fisheries and aquaculture.

d. Blue Revolution: Launched in 2015, this program aims to promote sustainable development in fisheries and aquaculture, with a focus on increasing fish production, productivity, and income for fisherfolk.

a. Positive implications:

b. Challenges:

These modifications can help further enhance the effectiveness of fisheries policies in India and contribute to the sustainable growth of the sector while addressing the needs of fisheries farmers.

See the following resource:

Pauly, D., Watson, R., & Alder, J. (2005). Global trends in world fisheries: impacts on marine ecosystems and food security. Philosophical Transactions of the Royal Society B: Biological Sciences, 360(1453), 5-12.‏

Sorry for not be able tot help you. N ow, I am a retired reseracher, and my field was related with abalone and lobster fisheries.

I use other models, but never VPA.

Yes, A mobile app uses AI and helps the fisheries farmer in identifying the O2 level , Ph value of the water , Temperature of the water etc .used in Tamilnadu,India

It means the types of crafts (mechanized/non-mechanized), and gears (active/passive) involved in the capture of targeted/non-targeted aquatic animals & plants mentioning the season/s, place & size of capture. Disposal of the catch finds a place in the theme. An important mention is also made of its Biology.

Which fish species in Africa are abundantly being harvested?

Aquaculture has the potential to contribute significantly to global food production and help meet the increasing demand for seafood. It can also reduce pressure on wild fish stocks and their environment. However, the sustainability of aquaculture production depends on various factors, including the cost of production, the efficiency of production systems, the availability of suitable resources, and the environmental impact of production.

The cost of production in aquaculture can vary depending on factors such as feed cost, energy cost, labor cost, and technology used. As with any type of agriculture, the cost of production can be influenced by market prices and other economic factors. In general, some types of aquaculture, such as high-value species like shrimp or salmon, may have higher production costs than other types of aquaculture, such as low-value species like tilapia or carp.

Efficiency of production systems, including the use of sustainable practices like recirculating aquaculture systems or integrated multi-trophic aquaculture, can also affect the sustainability of aquaculture. These practices can reduce the amount of resources required for production, such as water and feed, and reduce the environmental impact of production.

Overall, while aquaculture can contribute to food production and sustainability, it is important to carefully consider the economic, environmental, and social implications of aquaculture development and production to ensure its long-term sustainability.

Sicyopterus lagocephalus is a small freshwater fish species found in the rivers and streams of Reunion Island and Mauritius. It is highly valued by the local population for its taste and is considered a delicacy in the region. As a result, it commands a high price in the market.

If you are interested in starting a business related to Sicyopterus lagocephalus, here are some things to consider:

Overall, starting a business related to Sicyopterus lagocephalus can be challenging but potentially rewarding. With careful planning, research, and sustainable practices, you can build a successful business that provides a valuable and unique product to the market.

Achieving the highest weight gain in the least possible time is a key objective in fish farming to increase productivity and profitability. However, it is important to do so using safe methods that do not compromise the health and welfare of the fish or have negative impacts on the environment. Here are some ways to achieve this:

By optimizing feeding practices, using suitable water quality management practices, implementing appropriate stocking density, using selective breeding techniques, and controlling disease outbreaks, it is possible to achieve high weight gain in fish in the least possible time using safe methods in fish farming engineering.

Cheers!

very helpful indeed

There are a few strategies that you can try to reduce the build-up of solid waste and its adhesion to the equipment in your intensively reared fish farming system:

I hope these strategies are helpful! Let me know if you have any additional questions.

It sounds like you are conducting an important and interesting research project on the blue swimming crab fishery in the Bicol Region of the Philippines. To identify a specific fishery from which to collect data and conduct key informant interviews, you may want to consider the following strategies:

By using these strategies, you may be able to identify a specific blue swimming crab fishery in the Bicol Region from which to collect data and conduct key informant interviews for your research project.

It sounds like you are embarking on a very interesting and important research project. Determining population parameters and characterizing the fleet are important aspects of any fisheries and aquaculture bioeconomics study. Here are a few suggestions for methodology and approaches that you may find helpful:

I hope these suggestions are helpful. Good luck with your research!

Thank you for sharing the information about the survey being conducted by the African Inland Fisheries Network (AFRIFNET). It is important for scientists, researchers, and resource managers to participate in such surveys as it helps to assess the state of inland fisheries in Africa and identify potential areas for improvement. The results of the survey will be useful for the AFRIFNET community and will be acknowledged in the final report.

Measuring discrimination can be challenging, as it often occurs covertly and may not be directly observable. One approach to measuring discrimination from the perspective of the predator is to use self-report measures, in which individuals are asked to report on their own discriminatory attitudes and behaviors. These measures may be administered through surveys, interviews, or other methods.

One commonly used self-report measure for assessing discrimination is the Modern Racism Scale (MRS), which was developed by McConahay and colleagues in the 1980s. The MRS asks individuals to report on their beliefs and attitudes related to race and racism, including their level of agreement with statements such as "It is really a matter of some people just not trying hard enough; if Blacks would only try harder they could be just as well off as Whites" and "Over the past few years, discrimination against minorities has become less of a problem in this country."

Other measures that have been developed to assess discrimination based on other identities include the Ambivalent Sexism Inventory (ASI), which assesses attitudes toward men and women, and the Sexual Orientation Scale (SOS), which assesses attitudes toward sexual minority groups.

In order to expand existing scales to measure discrimination from the perspective of predators more directly, researchers could consider adding additional items that specifically focus on discriminatory behaviors and attitudes. For example, items could be added that ask individuals to report on the extent to which they have engaged in behaviors such as excluding or mistreating others based on their identity, or the extent to which they hold negative stereotypes about certain groups. Researchers could also consider incorporating measures of empathy and perspective-taking, as these may be related to an individual's willingness to engage in discriminatory behaviors.

The Cunner (Tautogolabrus adspersus) is a species of fish found in the northwest Atlantic Ocean, including the waters off the coast of the United States, Canada, and Greenland. Cunner are a small, reef-associated species that are typically found in shallow, rocky areas along the coast. They are primarily carnivorous, feeding on small crustaceans, mollusks, and other invertebrates.

While Cunner are an important food fish in the northwest Atlantic region, they are also commonly used as cleaner fish on salmon farms. Cleaner fish are small species that are introduced to salmon farms to help control parasites and other diseases by feeding on the parasites and damaged skin of the farmed salmon.

To find information on the Cunner fishery in the northwest Atlantic, you may want to consult the following sources:

I hope this information is helpful! Let me know if you have any further questions.

Most of the time, nutrients are washed and deposited from the adjacent terrestrial ecosystems to the marines by various agents including moving water, wind, melting ice, landslides, and gravity so that most essential nutrients are readily available in the marine ecosystems where producers are able to prepare their food . Terrestrial ecosystems are ecosystems found only in land; these include tropical rain forests, deserts, grasslands, deciduous forests, tundra, and taiga. Aquatic ecosystems are ecosystems found in bodies of water; these include lakes, rivers, ponds, wetlands, oceans, and seas. Marine Energy Resources Total accumulation is very rich, and it is a great wealth, but the development of marine resources is not unlimited. Although it can promote the development of national economy, the sustainable development of marine resources should be considered. As the marine science and technology are growing today, the sustainability of marine resources is also seriously threatened. Marine conservation can also increase resilience in maintaining marine ecosystems. Marine-protected areas can be used to protect geological features and processes that are identified as unique or distinctive. This can help protect marine biodiversity such as fish, coral reefs, and other marine animals Marine systems suffer from a scarcity of spatial data relative to terrestrial counterparts. In terrestrial systems the spatial patterns of land-use/land-cover are relatively straightforward to access via satellite and have been used as proxy indicators of service provisions. In contrast, remote sensing tools used to study the surface of the Earth are much less effective at capturing images of the seabed, and by extension marine habitats. Marine waters and their constituents are also frequently driven great distances by winds, tides, and currents. This creates a challenge for management as the identification and protection of areas where ecosystem services are exploited is not necessarily sufficient to ensure sustained service delivery. Further complications arise from the three-dimensional uses of marine systems, incorporating activities that use the sea surface, the water column and the benthic habitats below. Awareness is needed around the limited progress in marine systems as this could affect the way we value the biosphere and the relative proportion between biomes. They often serve important ecological functions, provide coastal protection, and are critical resources for food, energy, tourism and economic development. In many parts of the world, such marine and coastal systems are under stress or are threatened from a variety of sources, both human and natural. Both aquatic and terrestrial animals can be vertebrates and invertebrates. Both aquatic and terrestrial animals show various adaptations to overcome different environmental conditions in each habitat. Aquatic biomes are probably the most important of all the biomes. Their medium, water, is a major natural resource. Water is the basis of life, it supports life, and countless species live in it for all or part of their lives.

Thanks Ahmad Al Khraisat for sharing these useful information.

So, firstly I will measure Iron concentration in the water.

Cheers,

Esmail

Use of AI in biodiversity, but not climate change!

You are correct, visual sorting gets increasingly difficult as the particle size gets smaller. The sizes of MPs that you are able to pick out of your sample first comes down to what you can see, and that is often dependent upon the magnification abilities of your microscope. And there can be a fair amount of error associated with that as MPs often look like other things (e.g., diatoms). Adding additional techniques before visualization can help a lot.

First is the digestion of the tissue. I have tried both KOH and H2O2 + heat on fish tissues and found them both to be effective. I typically use H2O2 at 65C for a few of hours with periodic agitation, depending on the size of the tissue sample. Karami et al. (2017) has a nice paper on different types of digestions. Next is separation from the surrounding media. If you are interested in separating by polymer type, then you can consider a density separation. Li et al. (2018) provides a good method. Just know that some of the chemicals used can be a little difficult to handle and particle size can impact buoyancy. The latter might be solvable by adding centrifugation (see Nguyen et al. 2019). You mention filtration, and I would say that is the most common method. There is some discussion about how to best filter samples to get the most MPs while avoiding contamination. While not the only one, Cai et al. (2020) addressed that subject recently. Personally, I think that filters are a good way to go if your MPs are large enough to be caught by it. You should consider passing the digestate and subsequent filtrates through multiple filters with smaller and small pore sizes so that you you don’t clog filter pores and when you get to the smallest particles large bits aren’t obscuring the view of smaller particles. Nanoplastics are still a big problem. The Nguyen et al. (2019) study says that their technique is able to separate those too, but I haven’t tried it yet. Its generally agreed upon (as of now) that there is no one good method to separate out the really small nanoplastics. And if you think you have a separation method, once they get that small, the only way to verify if you got any is by using an electron microscope (maybe uFTIR…very much maybe). That’s one of the reasons most people purchase fluorescent NPs to use in their exposure experiments. Next is the Nile red staining that you mentioned (I’m assuming you are using protocols from Maes et al. 2017 and Shim et al. 2016?). I certainly see this as one of the more commonly used methods to differentiate MPs from their background. And, if your microscope has enough resolution, you should be able to see particles <500um. Considering that you are using shrimp tissue, you should determine if you will get autofluorescence within the same wavelengths as the stain. I also recommend reading Meyers et al. (2022); they have some interesting ideas about using Nile red that I look forward to trying. Stanton et al. (2019) proposes the use of DAPI as a costain gives better results. And as the previous responder mentioned, FTIR has the final say in whether something is a plastic or not, and what kind it is. If it is possible for you to do on at least a subsample of what you separate from your sample, then it will make your study stronger. Regarding tissue type, I think that has more to do with your question. When dealing with aquatic organisms, exposure route should be carefully considered as it can be inhalation, dermal, and/or ingestion. Particle size typically determines if an how a particle can translocate through the body, and not all tissue types are equally permeable. The muscle seems like generic sort of tissue to look at, not in a bad way though. Would it be possible to collect hemolymph?

I’m not sure how much I helped to solve your problem, but I hope I at least gave you a few more directions to look in.

Good luck!

- Melissa

Cai, H., et al. (2020) Microplastic quantification affected by structure and pore size of filters. Chemosphere 257, 127198. http://doi.org/10.1016/j.chemosphere.2020.127198

Nguyen, B., Claveau-Mallet, D., Hernandez, L. M., Xu, E. G., Farner, J. M., & Tufenkji, N. (2019). Separation and analysis of microplastics and nanoplastics in complex environmental samples. Accounts of chemical research, 52(4), 858-866. https://doi.org/10.1021/acs.accounts.8b00602

Karami, A., et al, (2017) A high-performance protocol for extraction of microplastics in fish. Science of the Total Environment 578, 485-494. http://doi.org/10.1016/j.scitotenv.2016.10.213

Stanton, T., et al. (2019). Exploring the efficacy of Nile red in microplastic quantification: a costaining approach. Environmental Science & Technology Letters, 6(10), 606-611. https://doi.org/10.1021/acs.estlett.9b00499

Meyers, N., et al, (2022). Microplastic detection and identification by Nile red staining: Towards a semi-automated, cost-and time-effective technique. Science of the Total Environment, 823, 153441. https://doi.org/10.1016/j.scitotenv.2022.153441

Li, L., et al., (2018). A straightforward method for measuring the range of apparent density of microplastics. Science of The Total Environment 639, 367-373. http://doi.org/10.1016/j.scitotenv.2018.05.166

Maes, T., et al. (2017) A rapid-screening approach to detect and quantify microplastics based on fluorescent tagging with Nile Red. Scientific Reports 7, Article number: 44501. http://doi.org/10.1038/srep44501

Shim, W.J., et al. (2016) Identification and quantification of microplastics using Nile Red staining. Marine Pollution Bulletin 113, 469-476. http://doi.org/10.1016/j.marpolbul.2016.10.049

It depends upon catchment area and habitat variations.

Sorry, I was hoping to help you

i read a paper on this improved technology in Florida, USA. i forgot the name of sensor used. Ashmita Poudel

Tradeoff between sustainability and resources use efficiency?

Sustainability and resource use efficiency overlap greatly but not entirely and the differences can be critical. In some cases discounting models may actually recommend fishing a stock to extinction rather than fishing sustainably. A similar problem exists in forestry. If it costs $7.00 to plant the three trees needed to replace an old-growth tree that has been harvested and the minimum time to harvest is 80 years -- the future vale of that $7.00 if the interest rate is 8% is $7(1.08)^80 = $3,304 -- the planting cost takes all or more than the value of the harvested log -- if the discount rate goes up and/or if the growth time goes up, replanting becomes problematic. For example a 700 year-old Blue-spot spruce tree is worth $50,000+ when harvested (it is perfect for piano sound boards and violins) -- if we apply our model with a discount rate of 8% and 700 years the resulting future cost of re-planting is $7(1.08)^700 = $1,745,000,000,000,000,000,000,000. The Canadian government resolves this problem by allowing logging firms to expense planting costs as a current cost and, thus, avoids the time value of money issue.

I suspect that the most economically efficient solution for (Patagonian) toothfish is to fish them to extinction in a few decades but fortunately most governments manage fish, trees, and other renewable resources for sustainability rather than economic efficiency. If you look hard and long you will find economics articles looking at this issue (particularly for whales in mid-to-late 20th Century).

You have an interesting topic -- good luck.

Hi Kristen,

EAF can be thought of as an offshoot of EBM (Ecosystem Based management). I am attaching a number of papers that should place these concept in the right frame for you. Enjoy and happy reading.

Cheers,

Tom

Small-scale fisheries are remarkably efficient at using the whole fish and directing both food and income to those who need them most, notes food-security researcher Sheryl Hendriks. (Compare that to industrial fleets, which waste an estimated 20% of fish caught.) Hendriks explains how a focus on artisanal fishers’ rights, smarter subsidies and local communities can reduce overfishing, improve livelihoods and strengthen food systems...

Having been a fish farmer (Rainbow Trout), my recommended diet for fish-eating birds is buckshot.

Abhijit, Marc, and Marion thanks for replying and sharing your answers.

Thanks all for sharing.

A good area for work would be in fish larviculture techniques or applied nutrition.

This is a good one:

Walters, Carl J., and Steven J. D. Martell. Fisheries Ecology and Management. Princeton, New Jersey: Princeton University Press, 2004.

Also, the American Fisheries Society books, including "Fisheries Techniques" are helpful:

Also, kindly check:

Sustainable use of CRISPR/Cas in fish aquaculture: the biosafety perspective

env variables like temp. has an effect

Check..

In my view the subject Fisheries Resource is multidisciplinary and a lot of scope for research. The following shall be taken as current

eDNA specific to endemic species

multiple fish stock assessment

LME based fisheries management

IUU fisheries

Bycatch reduction and management

Impact of MPA on resource

Studies on endangered/ endemic resource

molecular systematics

migratory stock

Rapid fish stock status assessment etc.,

Thank you for your response.

Dear Saida: I suppose you better ask the ministry or directorate of fisheries in Morocco, because they know their rules. After that, you can suggest some of the internationally used standards. Wish you luck.

1. What type of gears that are used in specific fishing grounds. 2. Determine the fish selectivity of some of the gears. 3. What are the endangered fish species in the specific areas for investigation

eDNA analysis is one innovation, or environmental DNA, all the tiny traces of genetic material that are left behind as living things pass through water or soil :)

Dear D.W. L.U. De Silva,

I propose the following research topic in the field of marketing and fisheries economics: Improving research techniques for marine fish populations and ocean ecosystems with the use of new ICT information technologies, Industry 4.0 and satellite technologies. Analysis of the state of fish populations in the seas and oceans, taking into account the issues of sustainability analysis, protection of the biosphere of marine and ocean ecosystems, implementation of the sustainable development goals and green economy. Analysis of determinants of the possibility of increasing expenditures and the scale of social campaigns with the use of new online media, including social media portals promoting the idea of ​​sustainability, protection of the biosphere of marine and ocean ecosystems, implementation of sustainable development goals, green circular economy, social environmental responsibility, reduction of greenhouse gas emissions e.t.c.

Best regards,

Dariusz

Some of those datasets are eight years old. If you are basing your research on the cited article or others like that, inquire to the authors what they used as the basic data for their LME definitions. Since you cited a climate paper, the following is based on the assumption you might be working with that sort of data )

Climate model and weather grids, and any subset for analysis like LME are NOT like conventional geographic spatial reference systems, and if you are using them in your research, you would do well to understand them.

Also, the grids are changing in a relatively short span of time as computational power has increased - the GFDL CM in the article has several versions ( https://data1.gfdl.noaa.gov/nomads/forms/deccen/ ) "... At different times during the past twenty years or so, a handful of global atmosphere-ocean general circulation models (AOGCMs) have been referred to casually as "The GFDL climate model". This casual, non-specific terminology can lead to some confusion, since people may not realize that the term has been applied to different models that have different features and yield different results.".

And data analysis is not necessarily straight forward using the stock GIS vector and raster tools.

There is more about the European grids at https://portal.enes.org/data/enes-model-data/cmip5/resolution

The because of the coarseness and computational needs of the models atmosphere, land, and ocean cells are not what you would get if you took some arbitrary vector GIS shapefile and simply created an LME grid using cell centers ( see the supplementary material LME grid cell counts at https://www.researchgate.net/deref/http%3A%2F%2Fjournal.frontiersin.org%2Farticle%2F10.3389%2Ffmars.2017.00201%2Ffull%23supplementary-material )

Let's kundly fill and share

The contribution of Fisheries is often more in the area of employment for individuals who are less employable than the average worker. See p.225 of:

Copes, P., "Implementing Canada's Marine Fisheries Policy, Objectives, Hazards and Constraints," Marine Policy, Vol.6, No.1, 1982. It can be found at:https://www.sciencedirect.com/science/article/abs/pii/0308597X82900240

I have a related article: Wright, C.S. 1990. Is Poverty in Fishing Communities a Tragic Process or a Matter of Choice? The 5th Conference of IIFET. 3-6 Dec/90. Santiago, Chile.

The key point is that fisheries allow communities to exist and if fisheries fail, entire communities become desolate.

You raised a very important question.

For combating illigal Unreported and Unregulated fishing, the engagement of fishers, governments and consumers for supporting fishery sector for it's fairness, sustainability and governed by government norms/rules is needed.

Use of antibiotics in fish farming has side effects, see this link

Whether this gene (or any gene) is appropriate for your study must be determined empirically and tends to be taxon-specific: for example, there is little variation within populations in the North American darters (Percidae), but fixed differences are common between populations; conversely, there is enough variation in many of the cyprinid species I have worked with. Note that Cytochrome b was (and is still) used intensively in North American Ichthyology since the early 1990s - and this literature would provide a very useful set of references to put your data in context. The more prominent studies using cytb were phylogeographic in nature (differences among conspecific populations), although some (including myself) have used cytb for intrapopulational work when appropriate. Note that much of the variation within species will be at the third codon position.

Dear Yavuz,

Do you need more information than is available from the FAO statistics?

They are quite comprehensive and something of a "gold standard"

Martyn