Cortisol is the principal glucocorticoid secreted by the interrenal tissue (steroidogenic cells) located in the head-kidney of teleost fish [1]. This hormone is released by the activation of the hypothalamus-pituitary-interrenal axis (HPI axis) [2]. When an organism is under stress conditions, the hypothalamus releases corticotropin-releasing factor (CRF) toward blood circulation. This polypept...

Reservoirs are artificial ecosystems that modify the hydrological and environmental components nearby. The long-term monitoring of fish assemblages in reservoirs may provide key information to understand how these allow population fluctuations identify proper conservation strategies. A sentinel-site approach method assessed changes Feitsui Reservoir (1024 ha) over 14 years, including periods 20...

Abstract Fluvalinate and esfenvalerate are pyrethroid insecticides used to control insect pests. These pesticides can enter the aquatic environment in different ways after use, causing toxicity. Tarek is a fish of Cyprinidae family native Lake Van basin Turkey. This study was conducted determine acute toxicity fluvalinate adult tarek. In bioassays, tarek with an average length 20.6±1.2 cm weigh...

There are increasing evidences that show many xenobiotic chemicals (called as endocrine disruptorchemicals EDCs) through interfering with endocrine system, have the capability to induce developmentaland reproductive abnormalities in humans and animals. The yolk protein precursor vitellogenin (VTG) hasproved to be a simple and sensitive biomarker for assessing exposure of fish to EDCs especially...

The objectives of the study was to determine the total lipid content, fatty acid composition and tocopherol content of muscle of eleven fresh water fishes belongs to Cichlidae, Anabantidae, Siluridae, Cyprinidae, Channidae families lived in reservoirs in Sri Lanka and to find high nutritious fresh water fish and the relationship of diet of fish with the feeding habits of fish. Muscle lipid cont...

Accurate knowledge of an organism's distribution is necessary for conserving species with small or isolated populations. A perceived rarity may only reflect inadequate sampling effort and suggest the need for more research. We used a recently developed method to evaluate the distribution of a rare fish species, the blackmouth shiner Notropis melanostomus Bortone 1989 (Cyprinidae), which occurs ...