Organicism (materialistic holism) has provided the philosophical underpinnings for
embryology since the time of Kant. It had influenced the founders of developmental …

In many vertebrate species, sex is determined at fertilization of zygotes by sex chromosome
composition, knows as genotypic sex determination (GSD). But in some species—fish …

Sexual reproduction is a fundamental aspect of life. It is defined by the occurrence of meiosis
and the fusion of two gametes of different sexes or mating types. Sex-determination …

In many species of cultured finfish, females exhibit higher growth rates than males and attain
larger sizes. In addition, in some species, males mature before reaching marketable size …

The apicomplexan parasite Cryptosporidium is a leading global cause of severe diarrhoeal
disease and an important contributor to early childhood mortality. Currently, there are no …

Up to now, temperature sex differentiation has been demonstrated in a single fish species,
Menidia menidia. This study analyzes this hypothesis in Oreochromis niloticus. Treatments …

In order to study the physiological implication of sex steroid hormones in gonadal sex
differentiation in fish, we first investigated the potential role of estrogens using two fish …

Channel catfish have an XX female‐XY male sex determination system. Although genetic
males of this species are readily feminized with exogenous steroid, the pattern of gonadal …

We have previously shown that hexarelin, a novel GH-releasing peptide (GHRP), is able to
elicit GH release when administered iv, sc or by mouth and that it is a more potent GH …

In many species of reptiles, sex is determined at fertilization by zygotic sex chromosome
composition. In other species, including all crocodilians, most turtles and some lizards, sex is …