Current knowledge on the melatonin system in teleost
Roberts (1993) divided spiny scales of teleosts
into three main types: the crenate with simple marginal indentations and projections, the spinoid with spines continuous with the main body of the scale and the ctenoid with spines formed separately from the main body of the scale.
fish Pimelodus maculatus Lacepede 1803, commonly known as yellow mandi, is a widespread species in South American rivers.
canicula, the compiled indices also revealed that crustaceans and teleosts
are the most important prey items in the diet of S.
Gonadotropin-releasing hormone plays a critical role in the control of reproductive functions in both mammals and teleosts
from the pituitary (Kumar and Trant, 2001; Kah et al.
Typically, 11-KT is the primary androgen in male teleosts
, and generally is highest concomitant with the breeding season to facilitate reproductive behaviors and physiology (Borg 1994).
Because of genome duplication, many teleosts
have two AhR genes, AhR1 and AhR2 (Hahn 2002).
Additionally, we further hypothesize that the presence of permanent magnets on hooks would not alter teleost
capture because teleosts
lack the ampullary organ.
Effect of cortisol on some osmoregulatory parameters of the teleost
, Oreochromis niloticus L.
The effects of Cd seemed to extend to other areas of the brain, namely, the anterior part of the nucleus glomerulosus (NGa; Figure 2c) of the diencephalic pretectal region that is involved, via mesencephalic circuits, with the regulation of visual motor functions in teleosts
(Kaslin and Panula 2001).
Topics include the evolution, expression, and regulation of the gonadotropin-releasing hormone (GnRH) gene, differences in structure-function relations between mammalian and non-mammalian GnRH receptors, molecular regulation of gonadotropin gene expression in teleosts
, pleiotropic effects of prolactin in teleosts
, activin and its receptors in fish reproduction, gonadal steroidogenesis in teleosts
, comparative aspects of regulation and function of estrogen receptors, and vitellogenesis and vitellogenin uptake into oocytes.
Small ([less than or equal to]49 mm) fish also consumed insects, arachnids, and copepods other than Calanus pacificus, whereas larger fish (75-99 mm) consumed high percentages of teleosts
(primarily unidentified species), hyperiid amphipods, and decapod larvae.