𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Diet and growth of the endangered Zingel asper in the Durance River

✍ Scribed by L. Cavalli; N. Pech; R. Chappaz

Book ID
104455676
Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
277 KB
Volume
63
Category
Article
ISSN
0022-1112

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✦ Synopsis

Annual monitoring of the apron Zingel asper in the Durance River, a tributary of the RhΓ΄ne in which the fish is endemic, indicated its narrow diet range. Three types of prey made up the basic diet: Diptera (Simulidae and Chironomidae), mainly in winter, and Ephemeroptera (Baetidae) and Trichoptera (Hydropsychidae), during the rest of the year. Although some potential prey (Coleoptera and Gammaridae) were present in the substratum, they were not found in the stomach contents of the apron. In spring specific food items (Heptageneidae) appeared to be actively searched for as indicated by stomach contents. This period coincided with the renewal of growth. More than 80% of the annual occurred before the beginning of autumn.

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