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    Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna-9208, Bangladesh

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Effects of temperature on phenotypic traits, reproductive success and offspring fitness in stripped dwarf catfish (Mystus vittatus)

Funded By: Ministry of Science and Technology, Bangladesh. 

Project Summery:

Environmental and ecological factors can directly influence phenotypes and capable to produce more durable phenotypic variation. Among such factors, temperature has a considerable importance as ecological factors that directly affect the phenotypic traits of aquatic organisms. Overall, the present study has revealed that temperature can influence the selected traits in stripped dwarf catfish (Mystus vittatus). The findings that have emerged from my work is that temperature has a significant effect on most of the selected traits, such as, fishes that assigned to the low temperature group exhibited increase in body weight parameters compared to those assigned to the ambient and hot treatment groups. Besides hot treatment group has significantly more bright/dark coloured fish than ambient and cold treatment. Ambient treatment group has significantly higher number of normal/natural coloured fish than hot and cold treatment. Also found that the low treatment group fish possessed significantly higher number of eggs than the hot treatment. The low treatment group fish has significantly higher number of sperm than the high and ambient treatment. However, the study has also shown that temperature manipulations have no significant effect on standard length, tail length, head length and body area. The findings from this work suggest that stripped dwarf catfishes are likely to provide an ideal and perfect study species for testing these possibilities. Moreover I strongly recommend for further experiments where temperature manipulation can affect some important postcopulatory traits (e.g. reproductive and offspring fitness) using other model species.

Details
Role Principal Investigator
Funding Agency National
Awarded Date June 2017
Completion Date May 2018