RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Effects of trawling on seafloor habitat and associated invertebrate taxa in the Gulf of Alaska

Auteur(s) / Author(s)

FREESE L. (1) ; AUSTER P. J. (2) ; HEIFETZ J. (1) ; WING B. L. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Auke Bay Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, 11305 Glacier Highway, Juneau, Alaska 99801-8626, ETATS-UNIS
(2) National Undersea Research Center for the North Atlantic & Great Lakes, University of Connecticut at Avery Point, Groton, Connecticut 06340, ETATS-UNIS

Résumé / Abstract

Short-term effects of bottom trawling on a 'hard-bottom' (pebble, cobble, and boulder) seafloor were studied on the outer continental shelf in the eastern Gulf of Alaska. Eight sites were trawled in August 1996; then, from a research submersible we videotaped each trawl path and a nearby reference transect to obtain quantitative data. Boulders were displaced, and large epifaunal invertebrates were removed or damaged by a single trawl pass. These structural components of habitat were the dominant features on the seafloor. There was a significant decrease in density, and an increase in damage, to sponges and anthozoans in trawled versus reference transects. Changes in density, or damage to most motile invertebrates were not detected. Delayed mortality, of apparently undamaged invertebrates, may have resulted in greater impact than we detected. Alternatively, over time, some invertebrates may have recovered from any damage previously suffered. A subsequent survey at these sites will address these questions.

Revue / Journal Title

Marine ecology. Progress series    ISSN  0171-8630 

Source / Source

1999, vol. 182, pp. 119-126 (33 ref.)

Langue / Language

Anglais

Editeur / Publisher

Inter-Research, Oldendorf, ALLEMAGNE  (1979) (Revue)

Mots-clés anglais / English Keywords

Trawl

;

Environment impact

;

Ocean floors

;

Habitat

;

Zoobenthos

;

By-catches

;

Alaska

;

North Pacific

;

Invertebrata

;

United States

;

North America

;

America

;

Pacific Ocean

;

Marine environment

;

Fishing gear

;

Anthropogenic factor

;

Mots-clés français / French Keywords

Chalut

;

Impact environnement

;

Fond marin

;

Habitat

;

Zoobenthos

;

Prise accessoire

;

Alaska

;

Océan Pacifique Nord

;

Invertebrata

;

Etats Unis

;

Amérique du Nord

;

Amérique

;

Océan Pacifique

;

Milieu marin

;

Engin pêche

;

Facteur anthropique

;

Mots-clés espagnols / Spanish Keywords

Traíña

;

Impacto medio ambiente

;

Fondo marino

;

Habitat

;

Zoobentos

;

Presa accesoria

;

Alaska

;

Océano Pacífico Norte

;

Invertebrata

;

Estados Unidos

;

America del norte

;

America

;

Océano Pacífico

;

Medio marino

;

Equipo pesca

;

Factor antrópico

;

Localisation / Location

INIST-CNRS, Cote INIST : 18208, 35400008532492.0100

Nº notice refdoc (ud4) : 1886068



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas