...Probably the proportionsare a reflection of crowding of the tadpoles in the pools where theyare developing or possibly due to water currents or other environmental factors... 
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Two of them, the Río Grande Barrier and the Sierra MadreBarrier, are physiographical, but the Tropical Barrier is maintained bya combination of environmental factors...
Ticul Alvarez 「The Recent Mammals of Tamaulipas, Mexico」
...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」
...It is not hereby meant to ignore the fact thatdifferential responses to dominant environmental variables occurwithin a species, indicating endogenous control over timing ofbreeding...
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」
...Table 1 shows the relationshipsbetween the environmental categories recognized by the writer inthe San Gabriel Mountains...
Terry A. Vaughan 「Mammals of the San Gabriel Mountains of California」
...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」
...3]: Environmental conditions were poor for growth andmuch like the conditions described for 1953...
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」
...The color pattern changes in the course of development, and theshade of color changes in response to environmental conditions...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
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