Výsledky vyhledávání - "Daniel Hefti"

Fishery changes during re-oligotrophication in 11 peri-alpine Swiss and French lakes over the past 30 years

Autor: Daniel Gerdeaux, Daniel Hefti, Orlane Anneville

Publikováno v: Acta Oecologica
Acta Oecologica, Elsevier, 2006, 30 (2), pp.161-167. ⟨10.1016/j.actao.2006.02.007⟩

Peri-alpine lakes in Switzerland and France exhibit a spectrum of intensities of eutrophication and re-oligotrophication over the past 30 years. Phosphorus inputs have been decreasing since the 1970s. TP has altered from 135 to 50 μg l−1 in the mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb763eae1e9bc3e21341f8d760dc3aff
https://doi.org/10.1016/j.actao.2006.02.007

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Comparative morphological and Electrophoretic studies onAfronurus zebratus(Hagen, 1864) comb. n. and other European Heptageniidae (Ephemeroptera), including a key to the European genera of Heptageniidae

Autor: Daniel Hefti, Ivan Tomka

Publikováno v: Aquatic Insects. 11:115-124

Specimens of Baetis fallax (Hagen, 1864) and B. zebrata (Hagen, 1864) were collected on the Island of Corsica. Imagines were obtained by breeding and were investigated morphologically and biochemically. Our results show that B. fallax belongs to the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb57d53de88142badf316b19cde0446f
https://doi.org/10.1080/01650428909361356

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