...We have not found tadpoles of two species of Smilisca in the same bodyof water and therefore cannot offer observations on ecological relationships insympatric situations... 
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Grinnell (1933:54) characterizes the ecological nicheof the race pallidus as being "open, sandy ground, often ...
Terry A. Vaughan 「Mammals of the San Gabriel Mountains of California」
...The Wisconsin border along thewestern portion of the Upper Peninsula forms nodistinctive ecological boundary...
Thomas F. Weise 「An Experimental Translocation of the Eastern Timber Wolf」
...An ecological survey of the mammalsof the Huron Mountain Area...
Thomas F. Weise 「An Experimental Translocation of the Eastern Timber Wolf」
...Inthese instances well marked ecological differences exist between thesubspecies involved...
James S. Findley 「Speciation of the Wandering Shrew」
...The ecological requirements of jumping mice, genus Zapus, andthe subspecies of Sorex vagrans that dwell in hydroseres are essentiallysimilar...
James S. Findley 「Speciation of the Wandering Shrew」
...Although the different specieshave ecological preferences and habits which differ, several speciesof Microtus may occur together in local areas such as the above...
Sydney Anderson 「Subspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and Colorado」
...Obviously, the diversity of ecological niches in the rainforest is sufficient to support a variety of related species...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...No ecological differences between this species and K...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...Etheridge, we again crossed theisthmus several times in order to gather ecological data in the wetseason, and studied especially hylid frogs, most of which had not beenseen in the dry season...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The most striking ecological assemblage ofamphibians in the rainforest is the arboreal group of species...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The limited ecological data available suggest that thespecies inhabits the open mesquite grassland of the Mexican Plateau...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...Specimens of this lizard have been collectedinfrequently; the few locality records and limited ecological dataindicate that it inhabits dense scrub forest and tropical semi-deciduousforest...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...There is disagreement among herpetologists concerning thegeneric name of the small lygosome skink in the United States andits ecological equivalent in China and Korea...
Robert G Webb 「Some Reptiles and Amphibians from Korea」
...Therefore, it seems as though the presence of the stream-habitatfor the tadpoles is a significant factor in the ecological distributionof the species of Ptychohyla...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...Similar ecological relationships were observed for several species ofCosta Rican hylids...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...As I have mentioned previously, ecological segregation andinterspecific competition probably is highly developed in the tadpolesof Ptychohyla...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...Under these circumstances it can be supposed that the different ecological preferences ofelaeochroaandstaufferidepend on the climatic changes that took place during the Pleistocene...
Juan R. León 「The Systematics of the Frogs of the Hyla Rubra Group in Middle America」
...An ecological study of the fishes of the Fall and Verdigris riversin Wilson and Montgomery counties, Kansas, March 1954, toFebruary 1955...
James Everett Deacon 「Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas」
...At present, there is a paucity of ecological niches in theupland tributaries and large rivers, as compared with streams ofintermediate size...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
...A preliminary survey and ecological study of the fishes of the SouthNinnescah and Spring Creek...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
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