The secretion of gonadotropic hormone (GTH) from the pituitary of teleosts is considered to
be regulated by neuropeptides and neuroamines of cerebral origin and steroid hormones …

This publication assess biodiversity loss in the context of global change (including changes
in soil, water, vegetation, and atmosphere). There are 18 chapters entitled: (1) the role of the …

Annual testicular cycles in the lizards Lacerta sicula and L. muralis appear to be regulated
by the interaction between seasonal changes in body temperature and an endogenous …

A comparison was made between the fecundity of female African catfish, Clarias gariepinus,
transferred from their natural habitat in Northern Israel to nearby fish ponds and an indoor …

In their natural habitat African catfish, Clarias gariepinus, show a discontinuous reproductive
cycle. This cycle follows changes in the gonadotropic activity of the pituitary. Gonadotropin …

The reproductive cycle of male and female African catfish (Clarias gariepinus) can be divided
into a breeding period (May–August), a resting period (September–February) and a period …

Intact and castrated juvenile male rainbow trout (Salmo gairdneri) were treated with
testosterone and gonadotropic hormone (GTH) to determine the maturational effects of these …

The proximal pars distalis (PPD) of the pituitary of the African catfish, Clarias gariepinus,
was studied with immunocytochemical methods at the ultrastructural level. Antiserum raised …

Under hatchery conditions the reproduction of the African catfish depends on artificial
induction of egg maturation and ovulation. In this study the effect of a number of potential …

Using antibodies against mammalian LH-RH, the double antibody immunofluorescence
technique has been applied to serial cross sections of the brains of adult Rana esculenta. …