منابع مشابه
The American Midland Naturalist
—Ascertaining the functions bird song requires information about when and where a song or, for males with multisong repertoires, songs are used. Because the need for and type of communication with mates and conspecifics changes with breeding stage and social context, detailed observations may reveal differential use of song or of different song types. Our objective was to examine the use, and d...
متن کاملThe American Midland Naturalist
—Defining the trophic position of stream organisms is a first step in understanding the ecology of lotic systems. Whereas trophic positions of stream fishes have been traditionally assigned based on dietary analysis, stable isotope ratios may provide additional information on the validity of this approach and may be used to verify energy acquisition assumed from dietary studies. In this study, ...
متن کاملThe American Midland Naturalist
—We sampled fishes and aquatic insects monthly ( Jun.–Sept. 2002) from intermittent tributaries of the Alum Fork of the Saline River (Arkansas, U.S.A.) to quantify the response of fish and aquatic insect assemblage properties to seasonal desiccation and habitat fragmentation. We collected a total of 4219 individuals, representing 18 species of fishes and 27 families of aquatic insects. Changes ...
متن کاملThe Psychology of the Naturalist
Probably primitive man recognised the value of birds as food well before his mind became capable of understanding his jealousy of their powers of flight. That humans have long considered flying to be desirable is shown by early artists portraying angels, as spiritual super-humans, with functional wings; also, Peoples such as the Assyrians carved bulls complete with wings, thus representing both...
متن کاملThe naturalist in a world of genomics.
Functional genomics provides new opportunities to address issues of fundamental interest in evolutionary biology and suggests many new research directions that are ripe for evolutionary investigation. New types of data, and the ability to study biological processes from a whole genome perspective, are likely to have a profound impact on evolutionary biology and ecology. To illustrate, we discus...
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 1869
ISSN: 0003-0147,1537-5323
DOI: 10.1086/270404