...semipalmatus) to environmental modalities distinct from thoseoperating elsewhere within the range of the eastern coastal populationor on the inland population... 
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...Regulation of breeding schedules in birds always involves someexogenous, environmental timing or triggering mechanism...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Such regulators, or environmental oscillators, are the"phasing factors" of the physiologic clock that dictate the temporaloccurrence of primary reproductive activity...
Richard F. Johnston 「The Breeding Birds of Kansas」
...It would be useful at this point to examinehow environmental variables relate to timing of breeding...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Any exogenous control, or environmental variable, can be looked onsimply as a timing oscillator...
Richard F. Johnston 「The Breeding Birds of Kansas」
...In the lowlands,musculus may be better adapted to environmental conditions and,therefore, more successful in competition with taylori for availablehabitat...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...This genus is probably most closely related tothe latter and has probably become highly modified to meet somepeculiar environmental condition or on account of some specializedhabits as yet unknown...
William E. Duellman 「A Review of the Frogs of the Hyla bistincta Group」
...Once begun, growth is moreor less continuous as long as environmental conditions permit foraging...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Tolerances to environmental temperatures, and reactions tothermal stimuli influence the behavior of ectothermal animals to alarge extent...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Terrapene ornata, like other terrestrial reptiles inhabitatingopen grassland, is especially subject to the vicissitudesof environmental temperature...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...As environmental temperatures rise in summer, the period ofmid-day quiescence is lengthened...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Man's civilizationin the Great Plains, chiefly his automobile and other machines,have compounded the total of environmental hazards...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Furthermore, individual differencesin choice of breeding time probably result from environmental factorsrather than genetic factors in most instances...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
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