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Accueil du site → Master → Etats Unis → 1989 → Selected aspects of the natural history of the desert sucker (Catostomus (Pantosteus) clarkii)

University of Arizona (1989)

Selected aspects of the natural history of the desert sucker (Catostomus (Pantosteus) clarkii)

Ivanyi, Craig Stephen

Titre : Selected aspects of the natural history of the desert sucker (Catostomus (Pantosteus) clarkii)

Auteur : Ivanyi, Craig Stephen

Université de soutenance : University of Arizona

Grade : Master of Science 1989

Résumé
Selected aspects of the life history of desert suckers [CatogtQimAS (Pantosteus) clarkiil were examined in four southeastern Arizona streams. Diet, age class structure, reproduction, and habitat use were analyzed from field data obtained from April 1987 through October 1988. Adults fed primarily on plant matter, while fry fed almost exclusively on diatoms. Aging of suckers by scales was not possible and length frequencies were too evenly distributed to determine age class structure. In 1988 ovary and teste development occurred from late January through April, with spawning commencing in May. Suckers primarily used pools with high water flow and significant ( 80%) cover formed by tree limbs, branches, leaves, and other debris. Deterioration or loss of suitable habitat is reducing the range of the sucker due to reductions in and manipulations of surface waters.

Mots clés : Catostomidae. ; Fishes – Ecology – Arizona.

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