differentiation in tilapia mossambica with special regard to the time of estrogen treatment effective in inducing feminization of genetic fishes.
Any animal with a standard length >18 mm (see Materials and Methods) whose external phenotype showed similar deviance from the typical hermaphrodite patterning was dissected to confirm gonadal sex
[12.] Guiguen Y, Fostier A, Piferrer Francesc, Chang CF (2010) Ovarian aromatase and estrogen: pivotal role for gonadal sex
differentiation and sex change in fish.
It was confirmed that no sex reversal was observed under these rearing conditions, as phenotypic sex was consistent with gonadal sex
, as phenotypic sex was consistent with gonadal sex
based on results of sacrificing 100 individuals randomly selected from each experimental batch.
Effects of estradiol-17b on gonadal sex
differentiation in two species of salmonids, the masu salmon, Oncorhynchus masou, and the chum salmon, O.
Sexually dimorphic expression of a teleost homologue of MUllerian inhibiting substance during gonadal sex
differentiation in Japanese flounder, Paralichthys olivaceus.
As noted earlier, phenotypic sex depends on gonadal sex
. In order to understand how this occurs, you must become familiar with some of the major aspects of embryonic development.
Roach were exposed as embryos from fertilization up to 300 days posthatch (dph; to include the period of gonadal sex
differentiation) or as postspawning adult males, and including fish that had received previous estrogen exposure, for either 60 or 120 days when the annual event of germ cell proliferation occurs.
Rather, sex is a complex constellation of characteristics that includes not only chromosomes but also "gonadal sex
, internal morphologic sex, external morphologic sex, hormonal sex, phenotypic sex, assigned sex and gender of rearing, and sexual identity." The court approvingly quoted Johns Hopkins researcher and medical doctor William Reiner, who wrote, "The organ that appears to be critical to psychosexual development and adaptation is not the external genitalia, but the brain."
The initial work-up must include baseline gonadotropin levels (LH and FSH), gonadal sex
steroids (testosterone, estradiol, and an drostenedione), and adrenal steroids (17 [alpha]-hydroxyprogesterone, dehydroepiandrosterone and dehydroepiandrosterone sulfate).
Influence of incubation temperature and gonadal sex
on body size and locomotor performance of hatchling common snapping turtles (Chelydra serpentina).
The Texas researchers suggest that theparthenogenetic lizard and fly, with their different origins and needs for a "male' presence, uncouple the tight association between gonadal sex
and behavioral sex.