The American Naturalist They did so to test the predictions of the Charnov-Bull model. The scope of the model for other reptiles, however, requires further research. As mentioned in Chapter 3, the sex of the echiuroid worm Bonellia depends on where a larva settles.
For instance, polychlorinated biphenyls PCBs are pollutants whose molecules are structurally similar to some estrogens.
Body size and agonistic experience affect dominance and mating success in male copperheads. Biology and commercial utilization of acrochordid snakes, with special reference to karung Acrochordus javanicus. However, not all declines are natural. Related articles in Web of Science Google Scholar.
Thus, syntopic species of amphibians and reptiles are correspondingly defenseless against the global threats of deforestation, draining of wetlands, and pollution from agricultural runoff. Indeed, residual yolk and other sources of stored energy are critical to meeting basal metabolic needs after hatching and during aestivation [ 1921 ].
Increased temperatures resulting from climate change could affect some reptiles and amphibians.
Crocodilians and some turtles may be affected the most, because of their temperature-dependent sex determination. Moreover, the international trade in turtles—which are eaten, sold as pets, or used in traditional Chinese medicinal remedies—is both extensive and unregulated Sharma Reptiles and Amphibians - Threats and Concerns.
Northern Spring Salamander 35 Gyrinophilus porphyriticus porphyriticus. Herpetologica 50 65 — Introduced species have been cited as a problem for many amphibians Stolzenburg Seminatrix Cope. Wildlife and weeds: Life in an alien landscape.
In birds and reptiles, estrogen is essential for ovarian development. Adv Genet , 14 , — Hoar and D. PCBs can act as an estrogen replacement, causing feminization of sex organs in growing reptiles. Model for evolution of Y chromosomes and dosage compensation. By agreement with the publisher, this book is accessible by the search feature, but cannot be browsed.