Reproductive Science in Sharks and Rays.

摘要: Sharks and rays make up 96% of the class Chondrichthyes. They are among most endangered any taxa, threatened through habitat loss, overfishing hunting for shark fin soup, traditional medicines or sport, because many species slow to mature produce low numbers offspring. ecologically reproductively diverse, though basic knowledge their reproductive physiology is lacking species. There has been a move towards non-lethal approaches data collection in sharks rays, especially with technologies such as ultrasound hormone analysis. Additionally, semen artificial insemination lending themselves develop tools manage small closed populations, cold-stored sperm being shipped between institutions maximize genetic diversity managed populations. The role steroid hormones elasmobranch reproduction appears broadly conserved, heavily influenced by environmental cues, temperature. For this reason elasmobranchs likely at risk perturbations due changes ocean warming. Current including computer assisted assessments study warming effects on motility intra-uterine satellite tags determine birthing grounds will serve generate mitigate anthropogenic that threaten future vulnerable groups fish.