Biology 2485B Lecture Notes - Lecture 15: Puberty, Hypothalamic–Pituitary–Adrenal Axis, Cortisol
17 Dec 2015
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What you excrete is not necessarily these specific hormones. Blood test, urine sample, feces test (especially in wild animals) Using fecal steroids as a window on the physiology of wild animals. Bad krogh model except for in the captive setting in this case we are talking about orca in the wild critically endangered interested to know why that is. Orca orcinus: three stable pods in wa and bc ( salish sea" populations, remain coastal, exclusively piscivorous (cf. transients that specialize on either, population declined by 20% 1995-2001 mammals or sharks) Vessel impact hypothesis : ferries, navy ships, container ships, tourist boats, yachts, kayaks, =changes in behavior, stress, reduced foraging. Inadequate prey hypothesis : decline in chinook salmon population due to dams, overfishing, habitat loss, srkw population growth, survival, fecundity, social cohesion are correlated with prey availability. Toxin hypothesis : biopsies reveal high concentrations of persistent organic pollutants in blubber, not addressed here.
