Aquatic Ecosystems

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12 Can something like a marine protected area be set up in a floodplain river environment?
By James Abbott · Nipissing University

Robin Welcomme · Imperial College London

This is an interesting idea, especially in the major tropical rivers where a significant proportion of the species present rely on floodplains either ... [more]

This is an interesting idea, especially in the major tropical rivers where a significant proportion of the species present rely on floodplains either for breeding or as nursery areas. There are, however, certain issues that need to be considered. Firstly the floodplain cannot be set apart from the main river channels as many species have complex life strategies with feeding, breeding, nursery and refuge habitats that are spatially quite separate. Apart from obligate floodplain dwelling species that permanently inhabit floodplain features such as lagoons or wetlands most species only occupy floodplains during the flood season. This means that for a species (or behavioural guild) to persist all habitats need to be conserved as well as the connectivity between them. Secondly, as already mentioned, the health of river fish populations (and the annual harvest from floodplain rivers) is very much conditioned by the magnitude and duration of annual flooding. As flood regimes are increasingly determined by other uses of water and the river basin, such as water abstractions for agriculture and damming for power generation, and floodplains themselves are increasingly being modified for agriculture, many of the processes that regulate river fisheries are basin level phenomena and need to be negotiated at that level. It is, therefore difficult to set aside sectors of the floodplain for conservation without taking all other uses of the basin into account.

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New I am looking for different views on climate change impacts on aquatic insects based on ecological and distributional patterns
I am working on aquatic insects on various aspects. Right now I am quite concentrating on How the climate change impact effects on aquatic insects bas... [more]

I am working on aquatic insects on various aspects. Right now I am quite concentrating on How the climate change impact effects on aquatic insects based on ecological preferences and distributional patterns.

By Sundar Suresh · Manonmaniam Sundaranar University

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10 Recommendations for commercially available water quality data bases?
By Neale Hudson · Hawke's Bay Regional Council

Azubuike Chukwuka · University of Ibadan

GEMSTAT is a water quality database produced by the United Nations Global Environment Monitoring System (GEMS) Water Programme and is dedicated to pr... [more]

GEMSTAT is a water quality database produced by the United Nations Global Environment Monitoring System (GEMS) Water Programme and is dedicated to providing environmental water quality data and information of the highest integrity, accessibility and interoperability. These data are used in water assessments and capacity building initiatives around the world. GEMStat is designed to share surface and ground water quality data sets collected from the GEMS/Water Global Network, including more than 3,000 stations, close to four million records, and over 100 parameters.

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1 How I can distinguish the genus and species of my tadpoles?
By Seyed Ali Johari · University of Kurdistan

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8 Can we store benthic invertebrates in ethanol for stable isotope analysis?
By Barbara Debeljak · National Institute of Biology - Nacionalni inštitut za biologijo

Christopher Sweeting · Newcastle University

I try and avoid it where possible. Effects are often species specific. Example EtOH is used in lipid extraction and the preservative will act to par... [more]

I try and avoid it where possible. Effects are often species specific. Example EtOH is used in lipid extraction and the preservative will act to partially extract lipids. It is rather more unpredictable at its efficiency than a proper extraction. Given lipids are depleted in 13C you get effect there. You can get effects on delta15N too although generally smaller and without any obvious systematic influence that I know of. Best bet is to treat all samples the same.

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2 Does anyone have some information about histology specimens for Daphnia magna?
By Seyed Ali Johari · University of Kurdistan

David Vaughan · Amanzi Biosecurity

Hi William, what is your fixation time for Davidson's, 48hrs? Do you use Davidson's for less time with small specimens or sensitive tissues? Regards... [more]

Hi William, what is your fixation time for Davidson's, 48hrs? Do you use Davidson's for less time with small specimens or sensitive tissues? Regards, David

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13 Which types of ecosystems may be present in the Caribbean deep sea?
By Torben Riehl · Universität Hamburg

Dola Bhattacharjee · Government of India

Dear Torben Here are some references on coral reef ecosystems in the Caribbean sea: 1. http://caribjsci.org/45_2_3/45_134-137.pdf 2. http://www.rsmas.... [more]

Dear Torben Here are some references on coral reef ecosystems in the Caribbean sea: 1. http://caribjsci.org/45_2_3/45_134-137.pdf 2. http://www.rsmas.miami.edu/assets/pdfs/mac/fac/Prospero/Publications/Shinn-Prospero_dust%20corals_GRL00_2000GL011599.pdf 3. http://jamaicachm.org.jm/PDF/June2008.pdf 4. http://www.utm.utoronto.ca/~w3bio/bio464/lectures/lectures_assets/reef.pdf Best Dola

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32 Is anyone using fish markets, esp. in artisanal fisheries, to measure exploitation rates or biomass in the wild?
By James Abbott · Nipissing University

Breno Barros · Universidade Federal do Pará

I have never used fish market data for this kind of survey, but I did have interviewed fishermen about fishing arts and techniques, and also about cha... [more]

I have never used fish market data for this kind of survey, but I did have interviewed fishermen about fishing arts and techniques, and also about changes in both ichthyofauna and environment along the past years in a given estuary located in northern Brazil. However, I am still not sure how to cross such qualitative data with those as observed in the wild... I have one publication on this theme, hope it may be useful.

BBarros et al_JCR (2011).pdf ×

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17 Chronic aquatic toxicity
By Edmond Sanganyado · University of California, Riverside

Mehjabeen Javed · Aligarh Muslim University

Yes fish is better option for chronic toxicity studies.

Yes fish is better option for chronic toxicity studies.

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16 Use of cilia to small drifting water-dwelling animals
By Dominique Hoover · National Institute of Oceanography

Dominique Hoover · National Institute of Oceanography

Dear Sven, Viscosity was something that I was working on about a year ago with relation to copepod movement and how it affected energy consumption du... [more]

Dear Sven, Viscosity was something that I was working on about a year ago with relation to copepod movement and how it affected energy consumption during diel vertical migration. Also there was a confusion regarding the variation of viscosity with depth in the ocean and its significance for organisms at low Reynolds numbers. Dominique.

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7 Has the economic potential of the use Odonata naiads in the control of mosquitoes in Africa been assessed?
By Selase Dewu · University of Ghana

Daniel Acquah - Lamptey · University of Ghana

Peter, your review sources are very appreciated

Peter, your review sources are very appreciated

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2 Is there any hope to stop an invasion by Pterygoplichthys after mature individuals of both sexes have been detected in a river?
By Juan Schmitter-Soto · El Colegio de la Frontera Sur

Azubuike Chukwuka · University of Ibadan

Apart from introducing a predatory species which in itself is a complex option, the spawning sites of these species can be targeted and manually elimi... [more]

Apart from introducing a predatory species which in itself is a complex option, the spawning sites of these species can be targeted and manually eliminated or with the use of some species specific chemical or toxicant.

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18 Can stream benthic invertebrates be used to assess water quality?
By Katryn Valeriano · Ateneo de Manila University

Carsten Viergutz · Bundesanstalt für Gewässerkunde

Certainly yes. Moreover they can be used as a warning system in aquatic ecosystems like studies with Dreissena polymorpha show. These biological monit... [more]

Certainly yes. Moreover they can be used as a warning system in aquatic ecosystems like studies with Dreissena polymorpha show. These biological monitoring systems can detect alarm situations in streams and are being used at several water control station in germany. 1. Jost Borcherding Ten Years of Practical Experience with the Dreissena-Monitor, a Biological Early Warning System for Continuous Water Quality Monitoring. Hydrobiologia February 2006, Volume 556, Issue 1, pp 417-426

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Open How to evaluate and compare the proportion of energy going through the planktonic and benthic communities in an aquatic ecosystem?
For example, along with the inflow into the lake receives nutrients and calcium sulphates. What proportion of their learning in different communities?... [more]

For example, along with the inflow into the lake receives nutrients and calcium sulphates. What proportion of their learning in different communities? How much is on the planktonic food web as detritus on?

By Nikolay Bayanov · FGNU GosNIORKh

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10 What are the factors which affect the self purification process in river?
By Dr.K.Mophin Kani · Manonmaniam Sundaranar University

Azubuike Chukwuka · University of Ibadan

@Mark its unlikely for self purification to occur more in the temperate than in the tropics because for instance the breakdown of organic matter via m... [more]

@Mark its unlikely for self purification to occur more in the temperate than in the tropics because for instance the breakdown of organic matter via microbes is more optimal and occurs all year round in the tropics.

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17 Lakes in the UK are to be poisoned in an attempt to wipe out a silver fish that is threatening waterways. Is this the best option?
By Sofia Augusto · University of Lisbon

Azubuike Chukwuka · University of Ibadan

Well said Ronald, two wrongs really don't make a right!

Well said Ronald, two wrongs really don't make a right!

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2 Is animal density higher in natural or artificial coral reefs? What primarily influences the preference for this certain kind of habitat?
By Tetris Tan · Ateneo de Manila University

Tetris Tan · Ateneo de Manila University

Thank you, Ms. Elham Oustan.

Thank you, Ms. Elham Oustan.

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6 Is there a reed land typology that classifies different types of reed (Phragmites australis)?
By Theo van der Sluis · Wageningen University

Theo van der Sluis · Wageningen University

@ Carla: We have finished the field work -besides, I prepared the inventory scheme and monitoring protocol, I did some training of staff from Poltava,... [more]

@ Carla: We have finished the field work -besides, I prepared the inventory scheme and monitoring protocol, I did some training of staff from Poltava, but I wasn't involved myself in the inventory and monitoring. So, unfortunately, I can't collect materials. I used Rodewald-Rudesco, I will check the other publication. Thanks!

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10 How is it possible to develop preventive measures appropriate in developing countries which don't have specialized microbial treatments yet?
By Yanick Simon · Université Quisqueya

Kouame Kouadio · University of Ryukyus

I am looking for someone who can do a stastical analysis of these data. I do not have a sofware and aldo do not know how to do it. Are these results... [more]

I am looking for someone who can do a stastical analysis of these data. I do not have a sofware and aldo do not know how to do it. Are these results significante in term of probability? Best regards,

Table 1 and 2.doc ×

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11 Do anybody know the major identification keys to identify male and female anchovies (family Engraulidae) from external morphology?

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Thanks Dola.

Thanks Dola.

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17 How does biological invasion of common carp impact a Lacustrine system?
By Chandrakiran Singh · University of Nebraska at Lincoln

Azubuike Chukwuka · University of Ibadan

Carp as an invasive species out-competes local fauna for nutrients and space until these native species decline to the point of outright absence.

Carp as an invasive species out-competes local fauna for nutrients and space until these native species decline to the point of outright absence.

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1 Examples of artisanal fisheries integrated management strategies which emphasize in tropical areas?
By Daisy Arroyo Mora · University of Costa Rica

Azubuike Chukwuka · University of Ibadan

The use of botanicals as biocides is a better suggested management alternative to the use of chemicals like DDT for artisanal fishing.

The use of botanicals as biocides is a better suggested management alternative to the use of chemicals like DDT for artisanal fishing.

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6 Isolation of Bacteria in Surface Water
By Edmond Sanganyado · University of California, Riverside

Edmond Sanganyado · University of California, Riverside

Thank you all for the great suggestions, if you have a protocol that I can try to follow it will be of great help. I have little experience in microbi... [more]

Thank you all for the great suggestions, if you have a protocol that I can try to follow it will be of great help. I have little experience in microbiology so a specific method will be awesome.

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29 How do phytoplankton remove heavy metals from the marine environment? Which heavy metals are removed from wastewater by phytoplankton?
By Taheri Reza · Hormozgan University

Jon Richfield ·

Dead right Peter; aquatic organisms behave in unexpected ways in their reactions to particular trace nutrients/poisons. It is very dangerous to speak ... [more]

Dead right Peter; aquatic organisms behave in unexpected ways in their reactions to particular trace nutrients/poisons. It is very dangerous to speak of say, "plankton" as if one had some monophyletic taxon in mind, when there often are gross differences in susceptibility even within a single species or life cycle. And it is about equally dangerous to speak of "copper" or "chrome", or "cadmium", as if by naming an element one had characterised its toxicological relevance in a given environment or season. The very element that had been shown to be harmless or even beneficial at first may gradually accumulate to toxic levels, or suddenly become toxic because some other organism had begun to release it from a bound form or changed its valency. Not to mention how some agents can cross toxic thresholds in food chains. And as for life cycles...! Etc. etc. You don't need me to multiply examples. The operative point is that there is no cheap and easy way to predict the pathways that toxic elements will follow. Some are sequestered in shells and connective or other bulk tissues. Some in mucus. Some are excreted. Some seem to be actively accumulated for defensive functions, such as vanadium in Tunicates. It is no good borrowing trouble by preparing for every possible contingency; the best one can do is first to see what happens, then carefully see whether one's interpretations of the apparent effects stand up to scrutiny.

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7 Does increasing the plantation along the river bed improve the quality of the river ecosystem?
By Dr.K.Mophin Kani · Manonmaniam Sundaranar University

Azubuike Chukwuka · University of Ibadan

Mangrove plantations along fringes of coastal wetlands also keep soil intact thus protecting adjacent water body from deteriorated water quality due ... [more]

Mangrove plantations along fringes of coastal wetlands also keep soil intact thus protecting adjacent water body from deteriorated water quality due to turbidity from suspended loads of soil particles.

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7 What are the possible health issues due to higher oligocheats in a fresh water system ?
By Dr.K.Mophin Kani · Manonmaniam Sundaranar University

Dr.K.Mophin Kani · Manonmaniam Sundaranar University

Thank you so much Ms.Dola and dear Azubuike Chukwuka for your valuable addition in this regard, i noticed abundance in some stretches that was highly ... [more]

Thank you so much Ms.Dola and dear Azubuike Chukwuka for your valuable addition in this regard, i noticed abundance in some stretches that was highly populated and various domestic activities. I Understand the fact about the benthic environment, thanks for both of you and dear Chandrakiran Singh & Amartya Saha for your valuable informatios

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6 How can I measure benthic environmental heterogeneity and complexity in sedimentary bottoms?
By João Bosco Gusmão Junior · Universidade Federal do Paraná

Azubuike Chukwuka · University of Ibadan

The Arrenhius power function could be used as a descriptive model for species accumulation patterns in the benthic environment: S = cAZ , or log S = l... [more]

The Arrenhius power function could be used as a descriptive model for species accumulation patterns in the benthic environment: S = cAZ , or log S = log C + z log A, where A is the surface area of the benthic environment of interest, S is taxonomic richness expressed as total number of species found, and c and z are regression coefficients. Specifically, z indicates the rate of species number increasing with area and c is a fitting coefficient, or estimated number of species per “unit” area.

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45 How to purify tap water to perform experiments with freshwater animals ?
By Sophie Sroda · University of Grenoble

Ayaz Ahmed · Council of Scientific and Industrial Research (CSIR), New Delhi

it is better not to use tap water, use the water from where the animals are brought. Filter water with 0.2 micron gravity filter to remove the organis... [more]

it is better not to use tap water, use the water from where the animals are brought. Filter water with 0.2 micron gravity filter to remove the organisms

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5 Is there a stain other than Triphenyltetrazolium Chloride that could be used on roots with a thick epidermis?
By Susara Marcotte · Laurentian University

Susara Marcotte · Laurentian University

Thank you Garriet, I will definitely look into it. Could you maybe point me in the right direction with respect to a publication that indicates the m... [more]

Thank you Garriet, I will definitely look into it. Could you maybe point me in the right direction with respect to a publication that indicates the mechanisms involved and possibly indicates the fact that this INT can be used as a measure of viability.

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4 Does anybody knows about interannual variation in rainfall as a factor affecting the feeding ecology and reproductive decisions of seabirds?
By Erick González-Medina · National Autonomous University of Mexico

Erick González-Medina · National Autonomous University of Mexico

Thank you Dola for you information. Best regards! Erick

Thank you Dola for you information. Best regards! Erick

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