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January 1, 1978annales de biologie animale biochimie biophysiqueOpen Access

The effects of alterations in photoperiod on ovarian development and spawning time in the rainbow trout (Salmo gairdneri)

C. C. Whitehead Niall Bromage J. R. M. Forster A. J. Matty J. Ralph Susan Taylor

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Abstract

The present study investigates the changes in serum oestradiol 17p, total calcium and phosphoprotein (as a measure of vitellogenesis) under a normal seasonal 12 month photoperiod cycle, normal yearly cycles compressed into 9 and 6 months, and a constant 12 hour light/12 hour dark regime and the effects of these experimental photoperiod regimes on the times of spawning of both male and female rainbow trout.

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Whitehead et al. (1978) studied this question.

synapsesocial.com/papers/6a845efa2327ba91ab8d88ec https://doi.org/10.1051/rnd:19780543

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