Character Displacement in Sphaeroma spp. (Isopoda: Crustacea). I. Field Evidence
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چکیده
منابع مشابه
Character Displacement in Sphaeroma spp. (Isopoda: Crustacea). 11. Competition for Space
The two sibling lsopod species Sphaeroma hookeri and S. rugicauda show divergent character displacement with respect to body size of syrnpatric populations (Frier, 1979a). The present paper investigates the hypothesis that this displacement causes a relaxation of interspecific competition for space. It provides field evidence of substrate preferences of the various lifecycle stages of isopods a...
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BRENDA DOTI, EVANGELINA SCHWINDT & FABRIZIO SCARABINO Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina Grupo de Ecología en Ambientes Costeros, Centro Nacional Patagónico (CENPAT-CONICET), Blvd. Brown 2915, Puerto Madryn (U9120ACD), Argentina. E-mail: schwindt@cen...
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Column (CC), thin-layer (TLC), high-performance liquid (HPLC) and ion-exchange chromatography (IEC), were used to investigate corotenoid and carotenoprotein complexes in Asellus aquaticus specimens from the Narew river. The following carotenoids were found: alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein, zeaxanthin, diadinoxanthin, mutatoxanthin, crustaxanthin, echinenone, hydroxyech...
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In order to test three hypotheses on digestive constraints that may have affected the colonization of land by isopods, two marine isopods and one semi-terrestrial species were screened for their ability to oxidize phenolic compounds and digest cellulose in natural and artificial diets. Ligia pallasii (Isopoda: Oniscidea) and Gnorimosphaeroma oregonense (Isopoda: Sphaeromatidea) oxidized dietary...
متن کاملCharacter displacement in polyphenic tadpoles.
Biologists have long known that closely related species are often phenotypically different where they occur together, but are indistinguishable where they occur alone. The causes of such character displacement are controversial, however. We used polyphenic spadefoot toad tadpoles (Spea bombifrons and S. multiplicata) to test the hypothesis that character displacement evolves to minimize competi...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 1979
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps001159