Over the last century the reproduction of sturgeon has been intensively studied par Russian scientists who established a technology for the ranching of alevins which included artificial fertilization of gametes taken from wild broodfish and larvae rearing. More recently, since 1970, major contributions originated from teams in the USA, the EU, Japan and Iran. A rather good knowledge of the repr...

Over the last century the reproduction of sturgeon has been intensively studied par Russian scientists who established a technology for the ranching of alevins which included artificial fertilization of gametes taken from wild broodfish and larvae rearing. More recently, since 1970, major contributions originated from teams in the USA, the EU, Japan and Iran. A rather good knowledge of the repr...

Solicitation signals by offspring are well known to influence parental behaviour, and it is commonly assumed that this behavioural effect translates into an effect on residual reproduction of parents. However, this equivalence assumption concerning behavioural and reproductive effects caused by offspring signals remains largely untested. Here, we tested the effect of a chemical offspring signal...

Sexually reproducing organisms must process and respond to internal and external stimuli to successfully synchronize physiological and behavioural processes involved in reproduction. One such cue is an individual’s social environment. Interactions with conspecifics affect a female’s reproductive activity by inducing, suppressing, and/or accelerating reproductive processes. For example, many stu...

Dissolved Oxygen (DO) is one of the most important factors for aquatic animals as especially those who derive dissolved oxygen from water. DO levels indicate quality Many biotic and abiotic may influence concentration like mixing different water bodies, upwelling, atmospheric exchange, respiration, photosynthesis, ice cover, pollution some physical salinity temperature. The fluctuations in affe...

Human population growth and its associated effects on the environment contribute to rapid decrease of biodiversity worldwide. Artificial light at night (ALAN) is an anthropogenic pollutant that increasing with spread urbanization may declines. ALAN alters migration patterns birds, communication in frogs, impacts reproduction, behavior, physiology multiple other taxa. However, most studies are b...

Selection clearly focuses on differences in reproduction, but studies of reproductive physiology generally have been carried out in a near vacuum of modern evolutionary theory. This lack of contact between the two fields may be about to change. New ideas indicate that sexual selection by cryptic female choice has affected the evolution of products in male semen that influence female reproductiv...