The plasma sex steroid profiles in the freshwater, sex-reversing teleost fish, Monopterus albus (Zuiew)

1987 ◽  
Vol 65 (2) ◽  
pp. 233-242 ◽  
Author(s):  
W.S.B. Yeung ◽  
S.T.H. Chan
Keyword(s):  
Teleost Fish ◽  
Sex Steroid ◽  
Monopterus Albus ◽  
Steroid Profiles

scholarly journals Fecundity and sex steroid profile in boarfish Capros aper

2021 ◽  
Vol 72 (1) ◽  
pp. 140
Author(s):  
Vera Sequeira ◽  
Elsa Couto ◽  
Ana Neves ◽  
Ana Rita Vieira ◽  
Adelino Canario ◽  
...  
Keyword(s):  
The Other ◽  
Sex Steroid ◽  
Spawning Activity ◽  
International Council ◽  
Incomplete Knowledge ◽  
Steroid Profile ◽  
The Status ◽  
Steroid Profiles ◽  
Commercial Species

The boarfish Capros aper is one of the most commonly discarded non-commercial species in the International Council for the Exploration of the Sea (ICES) Subdivision VIII in the Atlantic. An increasing interest in this fishery and an incomplete knowledge on the status of the stock justified the present investigation focused on the determination of fecundity type and its estimation, supported by sex steroid profiles for 17β-oestradiol (E2), 11-ketotestosterone and 17,20β-dihydroxypregn-4-en-3-one (17,20β-P). C. aper was found to have indeterminate fecundity with a mean relative batch fecundity during the spawning peak of 50 oocytes g−1 eviscerated weight (WE) and a mean relative annual fecundity of 4020 oocytes g−1 WE. E2 variations throughout the year indicated the existence of at least two important spawning events, one in winter (January–February) and the other in summer (June–August), with concentrations in females increasing from those with growing oocytes in the developing phase to those in the spawning capable phase. Higher E2 concentrations were also found from 2000 to 2400 hours and from 0800 to 1200 hours suggesting more intense vitellogenesis activity during the night and in the morning, in contrast to 17,20β-P concentrations, which were higher between 1200 and 2000 hours, suggesting a more intense spawning activity during this period.

scholarly journals Reproductive and Somatic Senescence in the European Badger (Meles meles): Evidence from Lifetime Sex-Steroid Profiles

Zoology ◽  
2020 ◽  
Vol 141 ◽  
pp. 125803 ◽  
Author(s):  
Nadine Adrianna Sugianto ◽  
Chris Newman ◽  
David W. Macdonald ◽  
Christina D. Buesching
Keyword(s):  
Meles Meles ◽  
Sex Steroid ◽  
European Badger ◽  
Steroid Profiles

scholarly journals Sex steroid profiles in zebra finches: Effects of reproductive state and domestication

2017 ◽  
Vol 244 ◽  
pp. 108-117 ◽  
Author(s):  
Nora H. Prior ◽  
Kang Nian Yap ◽  
Mark C. Mainwaring ◽  
Hans H. Adomat ◽  
Ondi L. Crino ◽  
...  
Keyword(s):  
Sex Steroid ◽  
Zebra Finches ◽  
Reproductive State ◽  
Steroid Profiles
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