Stress physiology as a predictor of survival in Galapagos marine iguanas
نویسندگان
چکیده
منابع مشابه
Stress physiology as a predictor of survival in Galapagos marine iguanas.
Although glucocorticoid hormones are considered important physiological regulators for surviving adverse environmental stimuli (stressors), evidence for such a role is sparse and usually extrapolated from glucocorticoid effects under laboratory, short-term and/or non-emergency conditions. Galápagos marine iguanas (Amblyrhynchus cristatus) provide an excellent model for determining the ultimate ...
متن کاملEvolution of body size in Galapagos marine iguanas.
Body size is one of the most important traits of organisms and allows predictions of an individual's morphology, physiology, behaviour and life history. However, explaining the evolution of complex traits such as body size is difficult because a plethora of other traits influence body size. Here I review what we know about the evolution of body size in a group of island reptiles and try to gene...
متن کاملBody size, performance and fitness in galapagos marine iguanas.
Complex organismal traits such as body size are influenced by innumerable selective pressures, making the prediction of evolutionary trajectories for those traits difficult. A potentially powerful way to predict fitness in natural systems is to study the composite response of individuals in terms of performance measures, such as foraging or reproductive performance. Once key performance measure...
متن کاملCorticosterone levels predict survival probabilities of Galapagos marine iguanas during El Nino events.
Plasma levels of corticosterone are often used as a measure of "stress" in wild animal populations. However, we lack conclusive evidence that different stress levels reflect different survival probabilities between populations. Galápagos marine iguanas offer an ideal test case because island populations are affected differently by recurring El Niño famine events, and population-level survival c...
متن کاملSex, drugs, and mating role: testosterone-induced phenotype-switching in Galapagos marine iguanas
Martin Wikelski, Silke S. Steiger, Bernhard Gall, and Karin N. Nelson Department of Ecology and Evolutionary Biology, Guyot Hall 303, Princeton University, Princeton, NJ 08544, USA, Max-Planck Institute for Ornithology, Von der Tannstrasse 7 D-82346 Andechs, Germany, Föhrenweg 1, D-86926 Greifenberg, Germany, Department of Animal Biology, 515 Morrill Hall, 505 South Goodwin Avenue, University o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2010
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2010.0678