the impact of pgf2? on total proteins, free amino acids and the amino transferases in the gonads of silkworm, bombyx mori l. were investigated in the present experiment. the effect of pgf2? resulted in increase in the total protein and free amino acid contents in the gonads of silkworm larvae indicating improved structural and dynamic levels of organization. the enhanced activity levels of amin...

Striped catfish tetraploid induction through heat shock that carried out in this study is not intended to produce on growth fries.But form a broodstock triploid fries cross breeding without any physical process.The from the previous were screened or selected by observing maximum number of nucleoli fin cells.The individuals used performance test was 105 which placed three different concrete tank...

Two zooxanthellate, scleractinian species present in the equatorial eastern Pacific, Psammocora stellata and Psammocora profundacella, were examined in terms of their reproductive biology and ecology at four study sites, non-upwelling (Caño Island, Costa Rica, and Uva Island, Panamá), upwelling (Gulf of Panamá, Panamá), and seasonally varying thermal environments (Galápagos Islands). Both speci...

Sichuan taimen (Hucho bleekeri), a critically endangered species, is listed as first-class protected species in China. The natural population has been missing from most of its known distribution areas for many years but was rediscovered the Taibai River 2012, providing an important resource conservation stocking taimen. In this study, 43 wild adult collected were determined gamete maturity arti...

The ultraviolet (UV) filter 3-benzylidene camphor (3BC) is used in personal care products and in a number of materials for UV protection. 3BC has been shown in vitro and in vivo in fish to be estrogenic, but possible effects on fertility and reproduction are unknown. In this study we evaluate whether 3BC affects reproduction of fish Pimephales promelas. After a preexposure period of 21 days, re...

The Chinese giant salamander (Andrias davidianus) is the biggest extant and endangered amphibian, which has an incongruous sex ratio during artificial breeding process indistinguishable in appearance. development mechanism of this rare species thus needs to be explored. We therefore conducted study explore molecular mechanisms hallmarks or gonad maintenance genes for CGS. In study, we sequenced...

BACKGROUND Infertility is an undesirable side effect and gonadal tissue banking is advocated in young cancer patients who are unable to preserve embryos or gametes prior to oncotherapy to achieve biological parenthood later on. Banking gonadal tissue is challenging and protocols to mature gametes in vitro are not yet clinically established. Transplanting ovarian cortical tissue at hetero-or ort...

Infertile couples including cancer survivors stand to benefit from gametes differentiated from embryonic or induced pluripotent stem (ES/iPS) cells. It remains challenging to convert human ES/iPS cells into primordial germ-like cells (PGCLCs) en route to obtaining gametes. Considerable success was achieved in 2016 to obtain fertile offspring starting with mouse ES/iPS cells, however the specifi...

The sex-dependent morphological asymmetry between gonads of bird embryos is generally considered to represent the critical point at which the definitive pattern of sexual differentiation is established. A quantitative study of growth in gonads of chick embryos (6to 11-day-old) and of duck embryos (7to 11-day-old) has been carried out in order to clarify in what manner growth of gonads is involv...