Questions related to Aquaculture
I am looking for some studies where they have used this technology in aquaculture and worked with live animals. I am trying to see if I can use this technology inside water.
I'm in the initial phase of my PhD in aquaculture and this is the phase of isolating the bacterial strain that I'm going to work with. I'm trying to isolate a bacteria (Rubrivivax gelatinosus) from the water in Pfennig media, but my sample is contaminating with different fungi strains. Do you know which antifungal I can add to the culture medium to purify my bacterial strains?
Land use Classifications of different types of water bodies through hyperspectral data.
Can i distinguish Coastal waters, inland waters, ponds, and inland aquaculture?
I'm interested in how different concentrations of vitamins might affect the fish. I have many different brands of food that I would like to test. Vitamins are usually shown as either IU/kg or IU/g but the values between diets that are supposed to be similar are very different. For example, my understanding is that if one of my diets says 1000 IU/kg that means that 1kg of feed will have 1000 IU of vitamin A. Another one of my diets says 30 IU/g so that means that in 1000g (1kg) I would find 3000 IU.
Am I correct? I ask because I would like to be able to convert these values to the same units to be able to compare them. Thank you.
I am reading about pilot projects of seed production of Ostrea edulis, found only some abstract from old paper mentioning north Spain, but I don't know if it is actually working in the mariculture companies on the Med.
Despite the high quality of fish-based ingredients in aquafeeds, reported unsustainability caused by their use in aquaculture, have raised global concerns and effort for replacing them.
Among the potential candidates ( insect meal & oil vs plant meal & oil vs microalgae meal & oil : Spirulina , Chlorella, etc. ), which ones have no side effects or don’t generate new environmental impacts ?
Do humans who eat food prepared in a restaurant face a higher risk of contracting an illness than those who eat packaged food?
We have procured metronidazole powder ( active ingredient) for an aquaculture experiment. The purpose is to study the effect of metronidazole on gut flagellates. But we have a problem with dissolving metronidazole in pure water.
Could someone suggest how it could be done?
The use of synthetic hormones for fish sex reversal has led to environmental concerns.
Is the use of phytohormones a sustainable solution?
"The development and validation of a medium density SNP genotyping assay in Shrimp" is a research proposal I'm currently working on. Given the restricted budget allotted (9,600 USD) to the project, I'd like to know ahead of time how much it might probably cost me.
There is a fresh water source with around 80 mg/L of Calcium to be used for Salmon farming (onshore) in an industrial large scale. As you know, at this level the water is moderately hard. Do you think this amount of Calcium (80 mg/l) is detrimental to fish (Alevin, Parr, or Smolt)? How about its effects on scaling or clogging the pipes and heat exchangers and so on?
If yes, which method would you suggest to eliminate/remove Calcium economically feasible: chemical precipitation, membrane separation, ion exchange, inhibiting scaling, or ....?
(As we know, there are many reports on the benefit of Calcium at low levels (10 mg/L) in fish hatchery, but could not find any reliable source for higher levels of hardness).
I am making a research on the above topic and would like to know what I should look out for. Topic- Is inconsistency in government policies and poor regulations affecting the aquaculture development in Nigeria?.
Anybody with an experience of farming of both Penaues monodon and Penaeus vannamei together. What will be the economics ?? Require expert opinions!!!
Thanks in advance.
I need the latest statistical information of both marine and inland (fisheries production and aquaculture) by country. I would be very happy if you share this information. Thank you so much,
I have what I believe to be several novel species of parasites, including some type of predatory marine isopod, that infected the Florida aquarium aquaculture supply chain. I have searched existing scientific literature and have found nothing that describes that species I have in my possession. They are incredibly hard to kill, and can live in soap, survive low concentrations of bleach, vinegar, and 3% hydrogen peroxide. Some of these parasites have translucent exoskeletons and burrow beneath the substrate to ambush prey using some type of proboscis to extend out of the substrate. Others lack an exoskeleton and instead are fluid, able to change shape to camouflage within plants or macroalgae, fit into empty shells, or attach to gastropods like hermit crabs and snails bodies and either kill them to eat immediately, allow them to live while attached to them, or lay their eggs within them to burst out at a later when conditions are suitable. They also seem to be able to use parts of their prey that they don't eat as parts of their own body. I have a 10 gallon tank filled with a wide variety of these parasites and a 2.5 gallon tank filled with what I think is a single isolated species of this parasite that burst out of a single hermit crab's abdomen. I also saved the cleaning supplies that these parasites managed to burrow into, some that were filled with soap. I do not have the expertise or equipment to properly identify these parasites or study them in any way besides direct observation. Would any researcher want to obtain these samples for study? I can give you more details on the parasite's specific behaviors and appearance if desired. Based on how fast these parasites reproduce and how quickly they can wipe out an entire aquarium, I believe that these species should be studied properly not only to identify and describe their species, but to also start to find ways to kill them without killing everything else in the tank. I have received similar types of parasites from 2 different Floridian aquaculture companies inadvertently and I fear that these parasites may have already infiltrated the aquarium supply chain. Therefore, it is important that these parasites be studied so that the economic damage they have the potential to bring to the aquarium aquaculture industry can be mitigated. Please feel free to call my at 763-245-9880 or email me at email@example.com if you wish to learn more or figure out the logistics of getting these samples to you.
The aquaculture industry's endeavour to avoid diseases casing microbes/carrier/macro predator to keep the farm-reared animals healthy to achieve good profit in the aquaculture business. Has the subsurface intake system has the ability to solve this problem?
I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker.
Does anyone know of a type of marker that can be used like this in Nile tilapia?
I could find treatment strategy or guidelines on humans but not on fishes. Could you suggest me some related to fishes?
we are trying to improve the representation of land use information in the regional climate model WRF for 1. aquaculture and 2. rice paddies in the Mekong River region (Vietnam). The major question is which existing land use class (from MODIFIED_IGBP_MODIS_NOAH classification) corresponds best to those?
If none of the predefined classes is suitable, we could add new classes to the LANDUSE.TBL, but we would need the parameters from experiments or from literature, i.e. albedo (ALBD %), soil moisture (SLMO × 100%), surface emissivity (SFEM %), surface roughness length (SFZ0 × 10 −2 m), thermal inertia (THERIN × 4.184 × 10 2 J/m 2 Ks 1/2 ), and surface heat capacity (SFHC × 10 6 J/m 3 K) for aquaculture and rice paddies, respectively.
Thank you very much for all kind of helpful suggestions.
I am growing biofilms for some aquaculture work, and I need to send the biofilm samples off for bacterial DNA analysis. What is the best way to preserve biofilms so they can be shipped to another lab? The biofilms are from seawater and adult sea urchins. Thanks in advance.
Hi All friends and researcher in the world , supporting me by your opinion , if you have studies , information
Will the rapid expansion of aquaculture and its demand for fish meal and fish oil threaten wild fish stocks?
We are conducting a respirometer trial with salmonids and want to access SDA variables in relation to temperature. We are wondering, if we can measure the Maximum metabolic rate (MMR) and the SDAcoefficient at the same time? We believe, measuring the MMR would add oxygen consumption, that is not directly related to SDA, but we would love to have the MMR as a measurement of potential growth. Is there a way, to measure both (e.g. by Q10 values, SDA values)?
Hi All , If you have or information for Aquaculture or Aquaculture farming Standards in your country Can help to putting as world Aquaculture Standers for all country .
Can anyone tell me or share any papers that would explain what's the benefit (or maybe a disadvantage) of a metagenic life cycle in jellyfish cultivation?
Suggestions for India’s Blue Economy
This is regarding India’s Blue Economy Policy. We are happy to see lot detailed information on India’s Blue economy Policy. Definitely we can get good economy from our oceanic region by promoting mariculture activities and other related aspects. We like to add some suggestions under Marine Fisheries, Aquaculture and Increasing sustainable marine capture fisheries.
Artificial reef deployment and Fish Aggregating Devices : Based on our NIOT experience in the following projects, Artificial reef deployment including High rise artificial reef and Fish Aggregating Devices for Tuna fishing, we can strongly recommend Artificial reef is the best method of restoration of marine biodiversity and to create new fishing grounds and the same artificial structures can protect the coast from cyclone or Tsunami when deployed in deep waters near coast.
Fish Aggregating Devices will also be helpful to increase the marine resources in our ocean waters apart from Tuna fishing in deep sea areas.
Artificial Floating Islands or Multipurpose floating platforms: Mariculture is the best method for marine conservation and to utilize the ocean surface for our economy. But due to heavy waves and rough sea in our Indian coast, we can’t carry intensively. By creating Artificial floating Islands or Multipurpose floating platforms, we can perform more open sea cage aquaculture and other related Ocean activities like Ocean Energy, desalination plants and Deep sea ports etc
Island Development: When comparing with main land coastal region, Andaman and Nicobar coast is more suitable for mariculture activites, so we should concentrate more on Islands for this kind development.
Integrated Mariculture : Further our approach should be Integrated farming by including seaweed and other marine organisms like bivalves near the open sea cage aquaculture to get full benefits by utilizing organic waste or nutrients released from fish feed waste and excretion.
Sea ranching: The old method of sea ranching should be considered to restore the marine organisms and conservation
Monitoring Marine Bioinvasion for Ocean Health; Prevention of marine bioinvasion is important in near future to maintain ocean health and that should be monitored, because that also one kind biological pollution. Already NIOT is working on Ballast Water Treatment Technology Test Facility to minimize bioinvasion.
Tuna Research Centre: Under Deep Sea Mission we can promote Tuna Research Centre for Tuna fishing and deep sea fishing.
Alternative Jobs to fishermen community: Alternative job and other related training must be encouraged to avoid more people depend on marine natural resources for their livelihood to minimize the degradation or total loss of biological resources
I would need to quantify amino acids present in hepatic vein of a fish. Do I also need to record the blood pressure to get the exact AA levels in the fish blood?
With all the lockdown regulations, sales and trade may not be as it was before, goods and services are impacted; fish and fish products and services are not left out.
Would you kindly share your thoughts, opinions, experiences, and/or research on the various ways the Covid-19 pandemic has impacted Fisheries and Aquaculture, across its value chain?
Positively or adversely.
Precious Preye Ayawei
I produced Glycerol monolaurate in lab scale, with a melting point of about 37 C. Now I want to use this product as animal feed additives. However the melting point of 37 makes the product difficult to be sold as solid nor as liquid. Now I need to convert this product to be liquid at room temperature, what do you suggest? Kindly put into consideration that the final product is feed additive.
One suggestion is to mix with a another material with very low melting point.
I will do experiments in aquaponics for integrating tilapia and lettuce.
Can I use polyethylene tank and black color??or must be fiberglass and other color??
The problem I can not buy fiberglass.
I am looking into the economic sustainability/feasibility of producing small-sized fish (tilapia and catfish) in pond farming aquaculture. I have made a list of parameters which may be needed (Growth rates, stocking density, survival rate, feeding rate, market price., etc.), though I am not sure whether I am on the right track.
I can't really find an existing model either. Any comment is welcome.
Nuri Max Steinmann
hi dear scientists;
I had two ponds of fish, ( 1 for catfish , and other for tilapia ), the water was renewed at a same time for tilapia and catfish , after 2 days the catfish were dead, any sign of illness, the quality of the spring water is good.
this white layer appeared after the death of the catfish, then became a condence, it is a sign of presence of chlorine or mucus related to the defense of catfish ?
please who has an explanation?
The affected fish (O. niloticus) are three months old. The infected fish were taken for a public display after which this infection started. Water quality parameter for the tank where the fish were stocked are as follows:
D.O. - 6.3 mg/l at 86% sat
Temperature - 25°C
Ph - 8.25
The infection was observed to start from blinding one eye then spread to the other, then the fish stops feeding and dies. The fish died after two weeks from the time of the first observation of infection.
Hello.here is Mr. Laid DARDABOU a PhD Algerian student. I'm gonna work for the same thematic as yours. Can we get a collaboration to expand the geographical area of the project? For my case I did chose the BSF and the moringa to be tested on broiler and aquaculture. Thanks in advance.
The State of World Fisheries & Aquaculture 2020 from FAO is now available online (Please find attached). In this horrid time of global pandemic, please comments on the ongoing problems and future prospects of world fisheries - particularly I am interested to know, where we stand and where to go from here and how - considering how covid'19 is impacting/would impact the sector. Thanks. Dr. Mostafa Hossain, SAFS, UW, Seattle
Are there particular impacts on aquaculture?
Also, how does the increase in zooplankton abundance correlate with fish population? Is it also somehow related to the effects of eutrophication?
Will highly appreciate your response on this matter. Thank you so much and have a great day!
Impressive sharings! Regarding on that matter,somehow people use kind of tamarind whichever in paste or liquid to get rid offlavor on flesh fish,wondering is it live fish can be done that way after post-harvest before being distribute into market?
I am thinking to investigate the roles of a specific gene during the embryonic development stages in a crab species. I was just wondering to ask about the possibility of gene knock-down or over-expression before hatching in aquatic animals.
Dose any have some experience regarding the drug/chemical/RNAi delivery into eggs in any aquatic animals?
This species was isolated from freshwater pond here in Perlis, Malaysia. Unfortunately, I'm not certain about the name for this species. The size of this microalgae in range 2.5-3.5 micron. Is this Oocystis sp.?
How to identify Nonpoint sources of water pollution in the Delta region?
Is there any hydrological model for identifying non-point sources of water pollution in agriculture and aquaculture based delta regions?
Eg: Western Godavari Delta.
Can I apply the SWAT model to Delta regions for identifying NonPoint sources of water pollution? (No streams but only canals and drains)
While comparing several biogeochemical parameters measured in different stations of the same estuary, or two different aquaculture ponds within the same wetland, reviewers have asked for carrying out repeated measures ANOVA instead of students t-test. I would like to know more about the applicability of repeated measures ANOVA, like when can it be applied? why is it better than students t-test (independent samples)? and most essentially when can we not consider this test?
Among various factors, the temperature is one of the most crucial factor for enzyme activity. For most of the enzyme assay, researcher use 37oC or normal room temperature as incubation temperature. If we consider the poikilothermic animals like fish, it's natural enzyme activity depends on habitat temperature and each fish (tropical, temperate, polar or cold water species) has their optimum temperature at which it grows best and we know growth is nothing but a consequence of optimum (good) metabolism.
So, is it right to use the mentioned assay temperature for enzyme activity of fish irrespective of its natural habitat?
Do the researchers need to modify the assay temperature according to optimum natural habitat temperature of fish?
Please provide your suggestions.
I am doing an in vitro research on the Nitrogen cycle in aquaculture pond water. For my experimental facilitation, I want to remove ammonia nitrogen from water without hampering the biomass of microbiota and other nitrogenous compounds. Can anyone please help me with possible solutions?
Thank you in advance.
Zoea 2 syndrome is currently the greatest loss of shrimp larvae across worldwide. By searching various articles and the discussions had with experts in aquaculture, the reasons behind Zoea 2 syndrome was not clear and the experts say that it may be due to the algal quality, nauplii quality and water quality of which the exact factor was not know, can anyone elaborate on the exact causative agent of zoea 2 syndrome in vannamei and the best control measures to prevent it apart form best bio-security practices would be highly appreciated and if any articles pertaining to zoea 2 syndrome in vannamei would be highly appreciated.
Thanks & Regards
Dr Vishnu Kiran Manam
I'm PhD graduated in fisheries. Have some experiences in crustaceans propagation, trout egg hatchery, larval rearing in RAS system, aquaculture in the floating HDPE cages in Caspian Sea and etc.
You can find my curriculum vitae in the attachment. All my fisheries research and activities are mentioned there, in brief.
If I have 10 kg of fish and produced 7.5 g ammonia per day from waste.
And according to the data each in literature each 0.57g of ammonia need 1 square meter of biofilter material such as bioballs to convert per day.
That mean this 7.5g ammonia need 13.3m2 of specific surface area of bioballs inside the biofilter tank.
the volume needed from convert this ammonia(7.5g) around 0.0443 m3
7.5g ..............need............... ??
Then we need 13.3m2 of specific surface area of bioballs to convert 7.5 g of NH3
If we used bio balls as biofilter materials which is have 600m2/m3 specific surface area and the volume needed from convert this ammonia(7.5g) around 0.0443 m3
The specific surface area 600m2/m3
And can convert as 600m2/1000L
The for 13.2m2
According to the calculation we need 22L from bioballs to convert 7.5 g.
The question is how we can put 22L of bioballs.
I mean put bioballs in container size 22L and fill by bioballs materials or what I must to do.
Isn't it amazing that the one region on the world where water is far more abundant than land and livelihoods are highly dependent on the ocean and its resources, that aquaculture has attracted the least research and funding?
With the current issues affecting the globe, it is high time the Caribbean region be given the necessary funding for aquaculture research and development.
This would create employment opportunities for thousands of people and reduce the region's dependency on foreign imports.
in some aquaculture facilities, you can find labs (microbiological and wet labs) for research objectives. in many cases, you have to do pathogen challenges for better consequences and analysis of your results. so, my exact question is that is it ok to done pathogen challenges in animals, especially fish, farms. If it is not ok, is there any references that cite this content clearly and with convincing reasons?
It seems world agriculture and food will be dramatically affected by Covid-19. Rather than exports, probably every country will cling to its own resources. I am very curious about what will happen to fisheries and aquaculture (fish meal and fish oil prices).
Could you please suggest me any Organisation/ company/ government that have fund/research grant for international research in aquaculture/ marine biology or related fields? (I can use the fund to do research in any lab/any country).
Thank your so much for your time. I really appreciate you time and answer.
We are conducting a respirometry trial with trout and want to know, if we can estimate the maximum metabolic rate without directly measuring it with a chasing protocol. We can´t trigger a MMR response because we want to measure the SDA over the full duration and it would add oxygen comsumption, not related to SDA.
I am currently looking data for infrastructure investment for marine transport, government expenditure or investment on fisheries or aquaculture, government expenditure on gas and oil exploration, government expenditure of harbour development ?
Could anyone suggest if any published papers related to the utilization of single cell proteins that mainly derived from fungal species, in particular Aspergillus in aquaculture practice?
Probiotics are working of life (living organisms, esp. bacteria) for life, by life and in life's suitable niche. They favour friends and ward off enemies, boosts immunity, maintain balance of the microbiome in gut. We can find its wide applications in the field of aquaculture.
You all please present probiotics' application in diverse fields of environmental management in tackling pollutants and toxicants. Discuss in detail and share relevant resources about how they act to fulfill the goal
innovation in fishing and aquaculture for direct human consumption, direct problems, suggestions for hypotheses?
In my city, there is a high rate of anemia in children, which is very worrying. The issue of creating food alternatives in high concentrations of iron is not enough, the consumer must feel the product is pleasant.
at the Museum of Nature South Tyrol, in Bolzano / Bozen, Italy, we're keeping in aquarium for more than 10,5 years 3 American horseshoe crabs Limulus polyphemus.
What is the maximum longevity of American horseshoe crab in aquarium?
as you know, micro-algae can change pH and make problems in aquaculture. i want to know how can i maintain pH in range of 6-8 or what materials can do it.
Is there any way to calculate the volume of freshwater usage in brackish aquaculture (i.e. shrimp farming) ? If not, is there any research with empirical data about it?
I concern about freshwater demand because in coastal area, farmers usually extract freshwater from groundwater to mix with saline water. The amount can be significant to some extent.
I want to do the following
1. Prepare a stock solution for Gramoxone pesticide (it is labelled 276g paraquat dichloride/L).
2. How do I determine the concentrations to be used in a fish toxicity experiment?
Can anyone help?
I am looking for an article in which a plant or combination of plants with a low dose (0.001 of food) is used to improve both growth and the immune performance of rainbow trout. The lowest dose of the crude plant as a supplement in the articles I dealt with was 0.01, But I'm looking for plants with a lower dose (about 0.001 or lower).