Nom du corpus

Corpus Systématique Animale

Titre du document

Divergent distributions of prey and predator, a fishing effect?

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Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Benthos
  • fish
  • vertical distribution
  • predation risk
  • selective fishing
  • Lake Constance
Nom du fichier dans la ressource
Mollusques_v2b_00692, Poissons_v2b_003432
Auteur(s)
  • J. Hartmann 1
  • L. Probst 1
Affiliation(s)
  • 1) Institute for Lake Research, Untere Seestrasse 81, D-88085, Langenargen, Germany
Résumé

To compare the vertical distributions of benthos and fish species of Upper Lake Constance (Bodensee), 552 benthos samples were taken with an Auerbach grab at four transects (10–250 m). An additional 54 samples (1–10 m) were collected elsewhere. Complementary data was taken from the literature. In winter, most fish feed on benthos, mainly chironomids, but in summer less than 5% do so. Formerly the bottom gill-netting aimed mainly at catchingCoregonus pidschian, but it now aims atPerca fluviatilis. Contrary to expectation, in winter the greatest abundance ofP. fluviatilis is much deeper (55 m) than that of its preferred food, i.e. chironomids (<20 m). Comparably,C. pidschian also stayed deeper than its main food source (chironomids and mollusks).Lota lota, Salvelinus profundus andS. alpinus — unlike the unwanted cyprinids — also stay or stayed deeper than the attractive chironomids. It is argued that the fish reduce their “predation risk”, i.e. the risk of being gillnetted in the upper 50 m, by “selecting” the deeper less dangerous, but also less food-abundant habitat. Balancing predation risk against food abundance may have led to “survival of the deepest”.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - immunologie fondamentale
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Water Science and Technology
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
  • 1 - science ; 2 - limnology
  • 1 - science ; 2 - environmental sciences
Identifiant ISTEX
88BF84819CB6137F4523255131498D87C4601641
Revue

Aquatic Sciences

Année de publication
1995
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.889
Sous-corpus
  • Mollusques
  • Poissons
Type de publication
Journal
ark:/67375/1BB-1M5H2549-D
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