caa a22 4500 469096721 CHVBK 20180323133033.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00317410 doi (NATIONALLICENCE)springer-10.1007/BF00317410 Feeding electivity of two epiphytic chironomids in a subtropical lake [Elektronische Daten] [P. Botts, B. Cowell] Summary: Feeding electivity of two epiphytic orthoclad chironomid species, Psectrocladius sp. and Thienemanniella cf. fusca, was investigated using gut content analysis of larvae collected from Typha stems in Lake Padgett, Florida. Electivity values, computed using Strauss's Food Selection Index, were strongly positive for Cosmarium and negative for Oedogonium and Bulbochaete. Diatoms either were avoided or grazed in proportion to their abundance in the environment. Patterns of electivity were similar for both chrionomid species during all seasons studied. Pairwise food preference experiments were conducted in the laboratory using the algal species, Cosmarium impressulum, Navicula pelliculosa, Selenastrum capricornuatum, Oedogonium cardiacum, and Synedra sp. Preferences were hierarchical and consistent for both larval genera. Preference ranking for the algae offered were Cosmarium≥Synedra>Navicula>Oedogonium>Selenastrum. Larvae seemed to be feeding electively based upon algal genus, size, position in the epiphytic community, and possibly extracellular chemistry. Springer-Verlag, 1992 Elective grazing nationallicence Chironomid nationallicence Epiphytic community nationallicence Algal consumption nationallicence Grazers nationallicence Botts P. Department of Biology, University of South Florida, 33620, Tampa, FL, USA aut Cowell B. Department of Biology, University of South Florida, 33620, Tampa, FL, USA aut Oecologia Springer-Verlag 89/3(1992-03-01), 331-337 0029-8549 89:3<331 1992 89 442 https://doi.org/10.1007/BF00317410 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317410 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Botts P. Department of Biology, University of South Florida, 33620, Tampa, FL, USA aut NATIONALLICENCE 700 1- Cowell B. Department of Biology, University of South Florida, 33620, Tampa, FL, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 89/3(1992-03-01), 331-337 0029-8549 89:3<331 1992 89 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer