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30.432  Articles
1 of 3.044 pages  |  10  records  |  more records»
Introduction: The fish reproduction knowledge is essential to support fish management, conservation and exploitation of the fish stocks. Fish species migrate for various purposes during different periods of their life cycle, and this involves spawning mig... see more

AbstractAdolescents and youth in South Africa comprise about 30% of the total population. This phenomenon is referred to as a youth bubble. Research shows that 52% of young people have had full penetrative sex by age 17, and yet 35% of teenagers who have ... see more

There is a need for research on adolescent sexual and reproductive health (SRH) to further clarify the broader developmental context of very young adolescents who are generally neglected in SRH research in developing countries. Programs can then address t... see more

Modern mankind, through the development of medicine and using its scientifically grounded innovations has learned to prolong human life. In Ukraine as in the whole world there is a tendency to increase in life expectancy. Since aging is a natural physiolo... see more

Clutch size, the important parameters of bird reproduction, directly influences bird reproductive result. The difference of interspecific or/and intraspecific clutch size has been widely applied to explain life history evolution. In order to know the fact... see more

Clutch size, the important parameters of bird reproduction, directly influences bird reproductive result. The difference of interspecific or/and intraspecific clutch size has been widely applied to explain life history evolution. In order to know the fact... see more

Strategies and reproductive modes of anurans (Amphibia) in a permanent pond in Serra de Paranapiacaba, southeastern Brazil. This study describes the temporal patterns, behavioral strategies, reproductive modes, and fecundity of an anuran assemblage in a p... see more

AbstractAdolescents and youth in South Africa comprise about 30% of the total population. This phenomenon is referred to as a youth bubble. Research shows that 52% of young people have had full penetrative sex by age 17, and yet 35% of teenagers who have ... see more

We examined the reproductive strategy of male (n = 84) and female (n = 62) S. spinosus from a single population in San Luis Potosí, México. The male reproductive cycle peaked in March and April and declined from May to September, and was not correlated wi... see more

1 of 3.044 pages  |  10  records  |  more records»