Artificial reproduction involves collection and handling of gametes in a way that secures their
quality and maximizes the fertilization outcome. In addition to initial sperm quality, numerous …

The spermatozoon is a highly differentiated and polarized cell, with two main structures: the
head, containing a haploid nucleus and the acrosomal exocytotic granule, and the flagellum …

Fish sperm motility is nowadays considered the best biomarker for the quality of fish
spermatozoa, and sperm motion parameters from more than 300 fish species have been …

The lifespan of spermatozoa from externally fertilizing freshwater fish ranges from a few
seconds to several minutes, depending on the species. External factors, such as …

Mammalian sperm must spend a minimum period of time within a female reproductive tract
to achieve the capacity to fertilize oocytes. This phenomenon, termed sperm 'capacitation' …

Anthropogenic environmental change has led to unprecedented rates of species extinction,
presenting a major threat to global biodiversity. Among vertebrates, amphibians have been …

Current rates of biodiversity loss pose an unprecedented challenge to the conservation
community, particularly with amphibians and freshwater fish as the most threatened …

The evolution of sperm quality and quantity is shaped by various selective processes, with
sperm competition generally considered the primary selective agent. Particularly in external …

Organophosphate flame retardants (OPFRs) are widespread in the aquatic environment, but
the effects of these chemicals on reproductive toxicity are far from clear. In this study, sperm …

Eggs of teleost fish, unlike those of many other animals, allow sperm entry only at a single
site, a narrow canal in the egg's chorion called the micropyle. In some fish (eg, flounder …