Diverse physiological and behavioural mechanisms allow animals to effectively deal with stressors, but chronic activation of the stress axis can have severe consequences. We explored the effects of chronic social stress on agonistic behaviour and gall bladder function, a critical but widely neglected component of stress-induced gastrointestinal dysfunction. Prolonged cohabitation with dominant ...

The entry of alien predatory fish in Indonesian waters has a negative impact on local ecosystems Indonesia, foreign can spread disease, become main predators and cause imbalance the food chain. From this study, we report presence type Cichlasoma urophthalmus (Günther 1862) or Mayan Cichlid from tropical North America caught Kedung Ombo Reservoir, Grobokan Regency, Central Java. species identifi...

Some anthropogenic noise is now considered pollution, with evidence building that noise from human activities such as transportation, construction and exploration can impact behaviour and physiology in a broad range of taxa. However, relatively little research has considered the effects of repeated or chronic noise; extended exposures may result in habituation or sensitisation, and thus changes...

The long, slender cones of the teleost retina elongate at night and contract during the day. In the Midas cichlid, Cichlasoma citrinellum, this cone excursion is elicited both by changes in light conditions and by strong endogenous circadian rhythms. In a normal day/night cycle. C. citrinellum cones change length by 69 micron. We have found that in this species an endogenous circadian rhythm in...

The genus Callinectes Stimpson, 1860 currently consists of 16 species, six of which are reported in Brazilian coast. In the present study, the first zoeal stages of Callinectes bocourti, C. danae, C. exasperatus, C. ornatus and C. sapidus from Brazil were obtained from ovigerous females. The morphological and meristic characters of all these larval stages are described and illustrated. Those of...