Thermal dependence of embryonic development and hatching rate in Labeo rohita (Hamilton, 1822)

The present study was designed to assess the embryonic development of Labeo rohita fertilized eggs incubated at four different temperatures (26, 31, 33 and 36 °C) until hatching. Fertilization was carried out at ambient temperature (26 °C) and was considered as 0 h of embryonic development. Developm...

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Bibliographic Details
Published in:Aquaculture 2006-05, Vol.255 (1), p.536-541
Main Authors: Das, T., Pal, A.K., Chakraborty, S.K., Manush, S.M., Dalvi, R.S., Sarma, K., Mukherjee, S.C.
Format: Article
Language:English
Subjects:
Animal aquaculture
Animal productions
Animal reproduction
Aquaculture
Biological and medical sciences
embryogenesis
Embryonic development
Experiments
fish culture
Freshwater
freshwater aquaculture
freshwater fish
Fundamental and applied biological sciences. Psychology
General aspects
hatching
Hatching rate
L. rohita
Labeo rohita
Temperature
water temperature
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Summary:The present study was designed to assess the embryonic development of Labeo rohita fertilized eggs incubated at four different temperatures (26, 31, 33 and 36 °C) until hatching. Fertilization was carried out at ambient temperature (26 °C) and was considered as 0 h of embryonic development. Developmental stages were monitored by sampling embryos in different temperatures at particular intervals. Highest hatching percentage and least time for attaining each ontogenic stage were observed at 31 > 33 > 26 > 36 °C and were significantly different ( p < 0.05). The lowest hatching percentage and maximum time duration for attaining a given ontogenic stage were observed at 36 °C; this treatment also resulted in malformed embryos. Our study demonstrated that incubation temperature significantly ( p < 0.05) influences hatching duration, hatching rate and survival of L. rohita eggs.
ISSN:0044-8486
1873-5622
DOI:10.1016/j.aquaculture.2006.01.013