Download Processing of Environmental Information in Vertebrates by Christopher L. Brown (auth.), Milton H. Stetson (eds.) PDF

By Christopher L. Brown (auth.), Milton H. Stetson (eds.)

In only one concise and lucidly written quantity a large number of subject matters is roofed introducing the result of large study at the processing of environmental info in vertebrates. sensible examples are supplied to demonstrate issues made within the textual content. Many elements, either from the exterior atmosphere and from in the animals personal cells or tissue make-up can at once function a strain to elicit physiological and/or behavioral responses within the organisms studied. gentle depth, photoperiod, circadian rhythms, seasonal version and daylenght, simply to identify a number of, are one of the environmental components which are correlated in those reports to behavioral or hormonal alterations, organ functionality, and copy. This paintings will function a guidebook and straightforward reference resource for college kids and learn pros in body structure, endocrinology, comparative zoology, and veterinary science.

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Extra resources for Processing of Environmental Information in Vertebrates

Sample text

The pinealectomies were performed on the lizards while they were held under conditions of constant temperature and illumination. Under constant conditions circadian rhythms are said to be "freerunning"; that is, they express their endogenous circadian periodicity (the period of the rhythm is the time between recurring phases of the rhythm on subsequent cycles, such as the time between successive activity onsets). Before pinealectomy all of the lizards depicted in Figure 3-1 showed a well-defined freerunning rhythm.

05) between sexually active and inactive males. L. Moore and P. Deviche High correlation between A VT concentrations in certain brain regions and behavioral state provide evidence that A VT regulates reproductive behavior in T. granulosa (Zoeller and Moore 1987). The concentrations of AVT immunoreactivity in several brain areas are significantly higher in sexually active than in inactive male newts (Figure 2-7). These data, along with the injection studies, support the conclusion that endogenous A VT is causally related to the male's propensity to exhibit male clasping behaviors.

C. ,. JA~N~~F~E=B--~M~A~R--~A~PR~~MA~Y~~~--~---A~U=G--~5~E~P--~0~CT~--N~OV--~OEC Figure 2-3. Seasonal variations in plasma androgen concentrations in anurans (upper panel) and urodeles (lower panel). c. is Rana catesbeiana, from Licht et al. e. is Rana esculenta, from D'Istria et al. m. p. is Cynops pyrrhogaster, from Imai et al. 1'. is Slilamandra salamandra. from Lecouteux et al. w. is Pleurodeles waltl, from Cayrol et al. t. is Ambystoma tigrinum, from Norris et al. g. is Taricha granulosa, from Zoeller and Moore 1985.

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