SEXUAL DIFFERENTIATION IN THE TELEOST FISH XIPHOPHORUS HELLERII, AS MODIFIED BY EXPERIMENTAL TREATMENT

Social and neural modulation of sexual plasticity in teleost fish.

Teleost fishes are the 'champions' of sexual plasticity among vertebrates. Several species have two male reproductive morphs with distinct suites of behavioral, somatic, neuronal, endocrinological, and life history traits. Here, we consider recent studies of the social and neural modulation of sexual plasticity for such species with a focus on two neuropeptides, gonadotropin releasing hormone (...

Iron acquisition by teleost fish.

Iron is a vital micronutrient for teleost fish, being an integral component of proteins involved in cellular respiration and oxygen transfer. However, in excess iron is toxic, and fish need to balance uptake to prevent deficiency vs. potential toxicity. This review assesses the current physiological and molecular knowledge of the mechanisms of iron acquisition in the teleost fish. It focuses on...

Leptin in Teleost Fish

MicroRNA in Teleost Fish

MicroRNAs (miRNAs) are transcriptional and posttranscriptional regulators involved in nearly all known biological processes in distant eukaryotic clades. Their discovery and functional characterization have broadened our understanding of biological regulatory mechanisms in animals and plants. They show both evolutionary conserved and unique features across Metazoa. Here, we present the current ...

In vitro germ cell differentiation during sex differentiation in a teleost fish.

To clarify the sexually dimorphic mechanisms of gonadal sex differentiation, we established an in vitro culture system for gonadal sex differentiation using the teleost fish Oreochromis niloticus. In vivo, the entry of germ cells into meiosis occurs around 35 days after hatching (dah) in XX gonads, whereas in XY gonads, meiotic cells became differentiated around 85 dah. In our in vitro culture ...