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Corpus Systématique Animale

Titre du document

Effects of three different water-control structures on the movements and standing stocks of coastal fishes and macrocrustaceans

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Springer (journals)
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Mots-clés d'auteur
  • weirs
  • impoundments
  • Louisiana
  • fish
  • brown shrimp
  • water-control structures
Nom du fichier dans la ressource
  • Barton D. Rogers 1,2
  • William H. Herke 3
  • E. Eric Knudsen 1,2
  • 1) School of Forestry, Wildlife, Louisiana State University Agricultural Center, 70803-6202, Baton Rouge, Louisiana
  • 2) Fisheries Louisiana Cooperative Fish and Wildlife Research Unit, Louisiana State University Agricultural Center, 70803-6202, Baton Rouge, Louisiana
  • 3) U.S. Fish and Wildlife Service, USA

Water-control structures are used in the coastal zone to enhance species-specific habitat, mainly for waterfowl, and in attempts to control saltwater intrusion and soil erosion. These structures invariably affect the movement of marine transient organisms. We used traps and trawls to evaluate the effects on nekton of a low-elevation weir, a fixed-crest weir, and a slotted weir. Data were collected from 15 February through 30 July in 1983, 1984, and 1986. Species richness and emigration of most species decreased as water control increased. Average weight per emigrating brown shrimpPenaeus aztecus increased with water control, although total biomass decreased. Immigration and emigration of brown shrimp were delayed by water control, and this effect was increased in ponds having greater water control. The number of emigrating brown shrimp was 3.4 times greater (1.8 times greater for biomass) from a pond controlled by a slotted weir than from one controlled by a fixed-crest weir. For brown shrimp, peak movement occurred near new and full moon periods in May and June. Increased openings in water-control structures, particularly at the times of peak movement, could increase movements and production of transient marine species.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - General Environmental Science
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Environmental Chemistry
Catégories WoS
  • 1 - science ; 2 - environmental sciences
  • 1 - science ; 2 - ecology
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  • Arthropodes
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