To investigate the changes in ovarian maturity in the tropical walking catfish, 15 females and
15 males (7 months old) were maintained under constant warm water temperature (23-25° …

The profiles of cortisol, testosterone, 11-ketotestosterone and 17α, 20β-dihydroxy-4-
pregnene-3-one in male rainbow trout reared under constant water temperature and natural …

Relation between sexual maturity and levels of two main steroid hormones in gonads, 17-
estradiol (E2) and testosterone (T) were studied by using histological and …

The present study investigates the relationship between testicular development and serum
steroid hormone levels in captive Pacific herring Clupea pallasii during the first reproductive …

The aim of this study was to assess fluctuations in daily water temperature in Chascomús
Lagoon during one year, and to evaluate whether the highest temperature recorded during …

An HPLC method was used to tentatively identify progesterone (P 4) and its metabolites (17-
hydroxyprogesterone (17-P 4) and 17, 20β-dihydroxy-4-pregnen-3-one (17, 20β-P)) …

Levels of estradiol-17β (E 2), testosterone (T), 17α, 20β-dihydroxy-4-pregnen-3-one (DHP),
and 17α, 20β, 21-trihydroxy-4-pregnen-3-one (20β-S) were measured by …

When autumn-spawning bitterling, Acheilognathus rhombea (known as the kanehira
bitterling in Japan) were held under a constant short photoperiod (10 hr light-14 hr dark) at …

The major objective was to investigate plasma steroid profiles after stimulation with LHRH-A
or HCG during the bisexual, mature male and female phases in black porgy, Acanthopagrus …

The steroidogenic profile produced by ovaries of brook trout (Salvelinus fontinalis) and
yellow perch (Perca flavescens) was examined using radioactive incorporation incubations …