22 Questions 349 Answers 0 Followers
Questions related from Azubuike Victor Chukwuka
Reports on incidences of aquatic invasive species, possible routes of arrival, historical and current effects of the species on the receiving habitat.
09 December 2013 7,414 15 View
Under what circumstances does a female skewed sex-ratio in a population become desirable or detrimental to the local population of a species?
03 September 2013 6,884 32 View
What fish species are more exposed to phthalate toxicity, pelagic or benthic? Please discuss in the light of the variety of phthalates present in the aquatic environment.
02 April 2013 4,398 2 View
Indepth insights into its concept and relevance to incidence of hybridization in wild fishes
02 April 2013 2,699 3 View
Is it possible for an endocrine disrupting substance to suppress reproductive development without affecting the fish condition (i.e. Fultons condition index)? If yes, what is the mechanism?
02 April 2013 7,335 2 View
why is S. galilaeus one of the tilapiine species with a high occurrence or likelihood of hybridization? is there an ecological reason?
29 March 2013 5,070 1 View
Please comment on taxonomy, ecology, habitat preferences and behavioral patterns.
25 March 2013 9,118 3 View
Please comment on taxonomy, and ecology.
25 March 2013 2,859 3 View
There have been contentions on the appropriate description of a number of metals that cause ecotoxicological effects, the definition of heavy-metals inherently does not depict toxic effects....
21 March 2013 267 5 View
What are amphidromous species? Are there any obvious benefits to this life style? Examples of tropical species that exhibit amphidromy?
20 March 2013 7,328 1 View
It has been documented in some studies that in an aquatic habitat like a lake or reservoir, despite the presence of many tilapia species, some species of tilapia are more likely to hybridize with...
20 March 2013 8,416 12 View
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...
20 March 2013 4,399 13 View
To examine the metal enrichment in sediment compared to background values, indices entailing geochemical normalization using Aluminium, or comparison to Average Shale content or World Surface has...
16 March 2013 6,183 7 View
A number of issues have been raised about Fultons K-index as a measure of fish health, ranging from inaccurate representations of the length - weight relationships to biased estimates for fishes...
15 March 2013 2,521 19 View
Chemical cues are part of the strategies for pairing with mates of the same species, but olfactory toxicity in fishes has been reported to affect the accuracy of responses to chemical cues in water.
14 March 2013 2,837 0 View
To recognize mates of their species, fish use visual cues, sound-cues, chemical cues or a combination of any of the two. For those highly dependent on visual cues, it is suspected or hypothesized...
13 March 2013 8,190 17 View
It is assumed that younger fish are sexually immature while older fishes are sexually mature. Can this knowledge be applied in any way to the estimation of fish age?
04 March 2013 365 12 View
Evaluating hybridization tendencies or extent of hybridization in fish species in the wild that are members of the same family using physical descriptions alone.
04 March 2013 7,172 4 View
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?
04 March 2013 3,490 0 View
Otoliths and vertebrae are common hard parts used to age fish, are there other ways of estimating fish age?
03 March 2013 7,015 8 View
When the otolith shape of a species of the same age occupying different habitats show a divergence in shape, does it necessarily imply different growth rates?
29 January 2013 5,154 9 View
This is quite an interesting study, but i'm interested in knowing if the incidence of neoplasia in this study is being related to the occurrence of contaminants where the organisms are sampled from?
01 January 1970 5,238 1 View
