Fish Ecology

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Question:
New Investigation of the behavior of Astacus leptodyctelus.
I want to investigate the behavior of Astacus leptodyctelus in different photoperiod and stocking density and record it with a video camera. Which fac... [more]

I want to investigate the behavior of Astacus leptodyctelus in different photoperiod and stocking density and record it with a video camera. Which factors or parameters can I investigate? How can I analyze behavior with software?

By Ardavan Farhadi · Marine Science & Technology University of Khorramshahr

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13 Is Ciguatera Fish Poisoning a Neglected Tropical Disease?
By Steven Kibler · National Oceanic and Atmospheric Administration

Santiago Fraga · Instituto Español de Oceanografia

IOC of UNESCO considers ciguatera as a neglected tropical disease: http://www.ioc-unesco.org/hab/index.php?option=com_oe&task=viewDocumentRecord&docID... [more]

IOC of UNESCO considers ciguatera as a neglected tropical disease: http://www.ioc-unesco.org/hab/index.php?option=com_oe&task=viewDocumentRecord&docID=10751

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7 Truss measurements in fish?
By Azubuike Chukwuka · University of Ibadan

Azubuike Chukwuka · University of Ibadan

Tanx Javaid, the publications were really helpful. Tanx again.

Tanx Javaid, the publications were really helpful. Tanx again.

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9 What drives hybridization in tilapia?
By Azubuike Chukwuka · University of Ibadan

Azubuike Chukwuka · University of Ibadan

On going studies with on some group of tilapiine cichlids are pointing to the fact that species are less likely to hybridize when the cephalic morphol... [more]

On going studies with on some group of tilapiine cichlids are pointing to the fact that species are less likely to hybridize when the cephalic morphology are significantly distinct i.. in terms of proportionate features relative to the size of the head.

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4 Freshwater bacteria in a coldwater system
By Jeremiah Salinger · Arkansas State University - Jonesboro

Jeremiah Salinger · Arkansas State University - Jonesboro

Thank you, Sonia, but I'm having to show first (for funding purposes) that I am unable to make an ID based on culturing before molecular work is going... [more]

Thank you, Sonia, but I'm having to show first (for funding purposes) that I am unable to make an ID based on culturing before molecular work is going to be possible.

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10 Can anyone provide an explanation or plausible theory relating to the difference in otolith shape and growth rate of the same species living in different habitats?
By Azubuike Chukwuka · University of Ibadan

Owen Wangensteen · University of Barcelona

Right! That's why I wrote "indeed weird enough for fishes!" in my comment. The pelagic and benthic realms are too different, But anyway, you could fin... [more]

Right! That's why I wrote "indeed weird enough for fishes!" in my comment. The pelagic and benthic realms are too different, But anyway, you could find some cases of generalist species able to thrive in demersal habitats with different degrees of complexity. I'm thinking about some sparids or some gadids, which could be able to live in different benthic/demersal habitats (rocky/sand/mud bottoms, for example).

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4 How can the extent of hybridization in a fish species be evaluated using morphometric and meristic variables?
By Azubuike Chukwuka · University of Ibadan

Azubuike Chukwuka · University of Ibadan

Thanks Ekrem, got some literature on the subject of hybrid intermediacy and came across some types of intermediacy i.e. phyletic and reticulate interm... [more]

Thanks Ekrem, got some literature on the subject of hybrid intermediacy and came across some types of intermediacy i.e. phyletic and reticulate intermediacy. I dunno if u've come across them before, if yes could u throw some light on it preferably using a morphological example?

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2 Bio-availability of phthalates to fish?
By Azubuike Chukwuka · University of Ibadan

Azubuike Chukwuka · University of Ibadan

Thanks Oscar, i'll look it up.

Thanks Oscar, i'll look it up.

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42 Which fish species lay eggs on algae?
By Trond Amundsen · Norwegian University of Science and Technology (NTNU)

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12 What are the possible solutions to analyze otoliths from juvenile fishes that are already too large for the microscope's camera field of view?
By João Teixeira · University of the Azores

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22 How to increase a population of fish in a river? What methods can you recommend?
By George Starostin · Sosnovoborsky Information Technology Center

Menakhem Ben-Yami · Freelance Consultant, Tel Aviv, Israel

In almost every case, fight pollution!

In almost every case, fight pollution!

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6 Is there a relationship between body-depth or girth and feeding activity of a fish population?
By Azubuike Chukwuka · University of Ibadan

Azubuike Chukwuka · University of Ibadan

Hi colleagues, I came across a publication recently which reported that prevailing body depth in a fish population may be an adaptation to predation ... [more]

Hi colleagues, I came across a publication recently which reported that prevailing body depth in a fish population may be an adaptation to predation depending on whether they inhabit open water or vegetated areas of aquatic habitats. Just wondering how this may relate to foraging activity of the fish.

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10 Are you aware of a captive breeding program for Pungitius hellenicus?
By Rayner Piper · Eastern Michigan University

Rayner Piper · Eastern Michigan University

Many thanks Emmanuil I shall look into the EU LIFE programme now.

Many thanks Emmanuil I shall look into the EU LIFE programme now.

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Question:
Open Prey availability and fish condition?
The condition/visceral fat of some fish species is believed to be affected by the seasonal availability of certain prey organisms. Is the problem of ... [more]

The condition/visceral fat of some fish species is believed to be affected by the seasonal availability of certain prey organisms. Is the problem of prey availability more likely to occur in the open sea or estuarine/brackish environments?

By Azubuike Chukwuka · University of Ibadan

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Question:
Open Feeding options for fish species in different habitats?
In the wild, what feeding options provide a fish species with more biomass or constitute more biomass that aids proper growth and meets with energy re... [more]

In the wild, what feeding options provide a fish species with more biomass or constitute more biomass that aids proper growth and meets with energy requirements, plankton or prey fish? And in the presence of a number of suitable food options for a species, what determines its final choice?

By Azubuike Chukwuka · University of Ibadan

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Question:
Open Does anyone have information regarding the Fish compositon, growth and physiological tolerance to salinity in Coorong, South Australia?
I need some information regarding the fish composition structure in Coorong lagoons.

I need some information regarding the fish composition structure in Coorong lagoons.

By Md. Hossain · Flinders University

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2 Does anyone know about fish studies in estuaries in Surinam?
By Mario Lepage · National Research Institute of Science and Technology for Environment and Agriculture

Mario Lepage · National Research Institute of Science and Technology for Environment and Agriculture

Many thanks Luis for these refs, I'll contact you soon. Mario

Many thanks Luis for these refs, I'll contact you soon. Mario

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1 Could there be a relationship between olfactory toxicity in fishes and inaccurate mating that results in hybridization?
By Azubuike Chukwuka · University of Ibadan

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16 Is it possible to control Carassius carp in large lakes?
By Levan Mumladze · Ilia State University

Levan Mumladze · Ilia State University

Great work!

Great work!

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8 How can I preserve horse mackerel otoliths after being immersed in glycerin-alcohol solution?
By Alba Jurado-Ruzafa · Instituto Español de Oceanografia

Azubuike Chukwuka · University of Ibadan

For large otoliths like is common with marine fishes, dry preservation is recommended; but for smaller and delicate otoliths as found in fresh water f... [more]

For large otoliths like is common with marine fishes, dry preservation is recommended; but for smaller and delicate otoliths as found in fresh water fishes, preservation in ethanol is recommended.

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8 Which is the best survey method for testing territorial behaviour of a fish species?
By Ioannis Giovos · Aristotle University of Thessaloniki

Ioannis Giovos · Aristotle University of Thessaloniki

Sorry guys for the late answer.... if you have some papers i would be extreme interested ....Answering to David i will work with wild population and i... [more]

Sorry guys for the late answer.... if you have some papers i would be extreme interested ....Answering to David i will work with wild population and is not feasible to work with external tags. Since you have experience on it i would love to provide me with more information

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Question:
Open Relationship between eye diameter and water depth inhabited by a fish?
it is believed that pelagic fish have larger eyes than benthic fish because of the amount of available light. Can this belief be confirmed by fellow r... [more]

it is believed that pelagic fish have larger eyes than benthic fish because of the amount of available light. Can this belief be confirmed by fellow researchers and why could this be?

By Azubuike Chukwuka · University of Ibadan

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16 Anyone have papers about the biology of Trachinus draco?
By Ioannis Giovos · Aristotle University of Thessaloniki

Ioannis Giovos · Aristotle University of Thessaloniki

I absolutely agree Philipp .... so i have nothing more to say

I absolutely agree Philipp .... so i have nothing more to say

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4 What is the most automatic way to perform struss network systems, preferably using image J?
By José Beirão · Memorial University of Newfoundland

José Beirão · Memorial University of Newfoundland

Thank you for your replies they have been very helpful

Thank you for your replies they have been very helpful

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5 Nursery value of macroalgae-dominated reefs?
By Adrien Cheminée · Université de Nice - Sophia Antipolis

Adrien Cheminée · Université de Nice - Sophia Antipolis

Thanks a lot for your answers, I will let you know any updates I may gather on this thematic. Cheers, Adrien

Thanks a lot for your answers, I will let you know any updates I may gather on this thematic. Cheers, Adrien

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5 Can anybody suggest list of toxicology journals with impact factor 1 that are free of cost?
By Jaya Krishna · SRM University

Monika Sheoran Kharb · Thapar University

1. RSC journal - Toxicology research link is: http://pubs.rsc.org/en/journals/journalissues/tx 2. Journal of Toxicology and Environmental by Taylor a... [more]

1. RSC journal - Toxicology research link is: http://pubs.rsc.org/en/journals/journalissues/tx 2. Journal of Toxicology and Environmental by Taylor and Francis link: http://www.tandfonline.com/loi/uteh20 3. Archives of Environmental Contamination and Toxicology link is http://www.springer.com/environment/environmental+toxicology/journal/244 4. Bulletin of Environmental Contamination and Toxicology link is: http://www.springer.com/environment/pollution+and+remediation/journal/128

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Question:
Open Why is the Portunus species widely distributed?
Widely distributed along Indo pacific region.

Widely distributed along Indo pacific region.

http://www.fao.org/fishery/species/2629/en ×
FAO Fisheries & Aquaculture - Aquatic species

By Azra M.N. · Universiti Malaysia Terengganu

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