Trends and Transitions in 150 Years ofThe American Naturalist
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چکیده
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 ...
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Celebrating 150 Years of Analyzing Fertility Trends in Germany Ever since the very beginning of the Journal of Economics and Statistics, population economics has featured prominently in the Journal. Fertility naturally plays an important role in population economics. Its size has decreased significantly from the 1900s. Long timeseries regarding fertility and basic trends in Germany are document...
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The place of Neandertals in modern human emergence has been a subject of debate since the first recognized Neandertal skeleton was discovered in 1856. This paper presents an overview of morphological, archaeological, and genetic evidence commonly used in discussions of Neandertals and their evolutionary significance. A brief historical sketch of the argument provides insight into the changing v...
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 2020
ISSN: 0003-0147,1537-5323
DOI: 10.1086/711418