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Khallaf, E., Passia, D., Abdccn, A., Mcsady, F. (2001). THE EFFECT OF TEMPERATURE VARIATION ON THE SEX COMPOSITION AND GROWTH OF PEOCILIA MELANOGASTER OFFSPRING. Egyptian Journal of Aquatic Biology and Fisheries, 5(4), 29-43. doi: 10.21608/ejabf.2001.1707
Elsayed Khallaf; D. Passia; Ahmed Abdccn; Feryal Mcsady. "THE EFFECT OF TEMPERATURE VARIATION ON THE SEX COMPOSITION AND GROWTH OF PEOCILIA MELANOGASTER OFFSPRING". Egyptian Journal of Aquatic Biology and Fisheries, 5, 4, 2001, 29-43. doi: 10.21608/ejabf.2001.1707
Khallaf, E., Passia, D., Abdccn, A., Mcsady, F. (2001). 'THE EFFECT OF TEMPERATURE VARIATION ON THE SEX COMPOSITION AND GROWTH OF PEOCILIA MELANOGASTER OFFSPRING', Egyptian Journal of Aquatic Biology and Fisheries, 5(4), pp. 29-43. doi: 10.21608/ejabf.2001.1707
Khallaf, E., Passia, D., Abdccn, A., Mcsady, F. THE EFFECT OF TEMPERATURE VARIATION ON THE SEX COMPOSITION AND GROWTH OF PEOCILIA MELANOGASTER OFFSPRING. Egyptian Journal of Aquatic Biology and Fisheries, 2001; 5(4): 29-43. doi: 10.21608/ejabf.2001.1707

THE EFFECT OF TEMPERATURE VARIATION ON THE SEX COMPOSITION AND GROWTH OF PEOCILIA MELANOGASTER OFFSPRING

Article 3, Volume 5, Issue 4, September 2001, Page 29-43  XML PDF (674.78 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2001.1707
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Authors
Elsayed Khallaforcid 1; D. Passia2; Ahmed Abdccn3; Feryal Mcsady4
1Zoology Dept, Minufiya University. Egypt
2Anatomy II Dept,Dusseldorf University. Germany
3Zoology Dept, Mansoura University, Egypt.
4Zoology Dept, Minufiya University. Egypt.
Abstract
The sexual differentiation of P. melanogaster embryos was examined among fish kept in glass aquaria (80x40x35 cm) at 23, 26and29°CwithapH=6.5.Analysis of variance of the data revealed a significant variation (at the 5 % level) of sex composition relative to increase of water temperature .Two mathematical representations were predicted for males and females.Accordingly, the degrees at which all males, or all females, or 1:1 sex ratio had been determined was 18.95, 32.01 and25.4°C respectively. The mechanism of this temperature effect on the sex ratio was discussed where growth offish was suspected to have played a role in this process.
Keywords
Temperture; sex composition; Growth; offspring; Peocilia
Main Subjects
Fisheries
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