Reproductive Condition and Behavior in Relation to Plasma Levels of Gonadal Steroids in the Spiny Damselfish Acanthochromis polyacanthus

Fish physiology and ecology: the contribution of the Leigh Laboratory to the collision of paradigms

“…These relationships have been confirmed across a range of species and settings using similar approaches to those pioneered here, in other studies at Leigh (Pankhurst & Kime 1991) and elsewhere (e.g. Kindler et al 1989;Cardwell & Liley 1991;Sikkel 1993;Pankhurst et al 1999Pankhurst et al , 2008aMagee et al 2006).…”

“…Some examples include: the demonstration of hormone-behaviour interactions among territorial males of tropical pomacentrids (Pankhurst et al 1999) and the role of population density in determining reproductive performance (Pankhurst et al 2008a, b); the effect of maternal cortisol profiles on larval and juvenile performance, and stress and maternal effects in pomacentrids (McCormick 1998(McCormick , 2006Pankhurst 2001); endocrine correlates of bi-directional sex change in gobies (Kroon et al 2003(Kroon et al , 2009; and the effects of ectoparasite load on stress status of wrasses (Grutter & Pankhurst 2000).…”

Effects of elevated water temperature and food availability on the reproductive performance of a coral reef fish

“…A. polyacanthus form breeding pairs, with most reproduction on the Great Barrier Reef occurring over a 4 mo period from October to February (Robertson 1973). Eggs are laid on substrate within caves (Thresher 1983) and care is provided to the benthic eggs by both parents (Pankhurst et al 1999). After hatching, the young remain with the parents for up to 45 d (Kavanagh 2000).…”

“…To investigate if water temperature and food supply affected gonadal steroidogenesis, blood samples were taken from each fish at the end of the experiment to estimate levels of the steroid hormones 17β-estradiol (E 2 ), testosterone (T) in females, and T, 11-ketotestosterone (11KT) in males based on their demonstrated roles in female and male reproduction respectively (Pankhurst et al 1999). Each fish was caught with a large hand net and a blood sample taken by caudal puncture using preheparinized syringes within 2 min of capture.…”

Some Aspects of Steroid Regulation in Teleosts

“…Это характерно, например, для акантохроми-са полиакантуса (Acanthochromis polyacanthus) [Pankhurst et al, 1999], северной рыбы-мичма-на (Porichthys notatus) [Knapp et al, 1999] и ко-люшки трехиглой (Gasterosteus aculeatus) . Интересно, что эта закономерность (снижение уровня андрогенов при переходе к заботе о потомству) наблюдается и у других позвоночных -у птиц [Van Duyse et al, 2000] и у человека .…”