Effect of temperature on sex ratio in guppy Poecilia reticulata (Peters 1860)
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Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the effect of temperature on survival and sex ratios of guppy Poecilia reticulata (Peters 1860) was investigated. Treatments of 19, 21 and 22.5 degrees C low and 29, 32 and 35 degrees C high water temperature were used on fry and gravid females for 11 days after parturitions and several days starting from the 16th day after first parturition until second parturition respectively. The high water temperature treatments caused the death of gravid females. Survival rates of heat-treated fry were generally decreased with increasing and decreasing temperature. The sex ratios of the progenies from survived gravid females were not differed from a balanced sex ratio (P > 0.05). The proportion of females increased gradually with decreasing temperature and the proportion of males increased gradually with increasing temperatures rather than having a threshold response in heat-treated fry. However, mortality of heat-treated fry was high; it is most likely that our results were biased by sex-dependent mortality, which were also revealed by corrected sex ratios of the treatment groups and progeny testing of some individuals. These results suggest that a major gene linked to X-chromosome could be responsible for resistance and sensitivity to both high and low temperature.
Açıklama
Anahtar Kelimeler
guppy, Poecilia reticulata, differential mortality, gene, sex ratio, TSD
Kaynak
Aquaculture Research
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
37
Sayı
2
