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Influence d'une période d'éclairement continu sur la première maturation sexuelle de la truite arc-en-ciel (Oncorhynchus mykiss)

Abstract : Sexual maturation rate at the age of 2 years was significantly lower in a group of rainbow trout (Oncorhynchus mykiss) under continuous light from the end of the vesicle resorption stage than in the control. This inhibition was almost total in females, while sexual maturation rate was reduced by half in males. The same phenomenon has been observed in a group of females maintained under constant illumination from the first day of 0+ July to the first day of 1+ July. The analysis of the physiological parameters has shown that the exogenous vitellogenesis did not start during the 1 + year. Moreover, it was confirmed that the continuous light exposure has a beneficial effect on the growth rate of the treated fish in comparison with control.
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https://hal.inrae.fr/hal-02697519
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Submitted on : Monday, June 1, 2020 - 11:27:02 AM
Last modification on : Thursday, March 31, 2022 - 3:42:40 AM

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Gérard Maisse, O. Noel, Bernard Breton, Lionel Goardon, Pierre-Yves Le Bail, et al.. Influence d'une période d'éclairement continu sur la première maturation sexuelle de la truite arc-en-ciel (Oncorhynchus mykiss). Bulletin Francais De La Peche Et De La Pisciculture, 1998, 350-351, pp.255-264. ⟨10.1051/kmae:1998002⟩. ⟨hal-02697519⟩

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