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Titolo:
Fish use of subtropical saltmarshes in Queensland, Australia: Relationships with vegetation, water depth and distance onto the marsh
Autore:
Thomas, BE; Connolly, RM;
Indirizzi:
Griffith Univ, Sch Environm & Appl Sci, Nathan, Qld 9726, Australia Griffith Univ Nathan Qld Australia 9726 Sci, Nathan, Qld 9726, Australia
Titolo Testata:
MARINE ECOLOGY-PROGRESS SERIES
, volume: 209, anno: 2001,
pagine: 275 - 288
SICI:
0171-8630(2001)209:<275:FUOSSI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALT-MARSH; PENAEUS-AZTECUS; NEKTON USE; NEW-JERSEY; COMMUNITY STRUCTURE; LOUISIANA ESTUARY; BROWN SHRIMP; EDGE FISHES; MORETON BAY; HABITATS;
Keywords:
coastal wetland; fisheries; submerged aquatic vegetation (SAV); estuary; Sporobolus; Gobiidae;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Connolly, RM Griffith Univ, Sch Environm & Appl Sci, Cold Coast Campus,PMB50,Gold Coast Mail Ctr, Nathan, Qld 9726, Australia Griffith Univ Cold Coast Campus,PMB 50,Gold Coast Mail Ctr Nathan Qld Australia 9726
Citazione:
B.E. Thomas e R.M. Connolly, "Fish use of subtropical saltmarshes in Queensland, Australia: Relationships with vegetation, water depth and distance onto the marsh", MAR ECOL-PR, 209, 2001, pp. 275-288

Abstract

Saltmarshes in subtropical Queensland, Australia, are assumed to provide habitat for fish, yet there has been no evidence as to whether fish actuallyoccur on the intertidal flats that constitute the main area of marshes. Nor has there been any assessment of differences in fish use of vegetated habitat and the extensive unvegetated saltpans that occur naturally and because of human activities. Fish were sampled from the intertidal flats of 2 saltmarshes in subtropical Queensland using floorless, buoyant pop nets (25 m(2)) on sets of spring high tides in summer (during day) and winter (at night). A total of 23 species was collected, with densities ranging up to 0.46 fish m(-2). Catches were dominated numerically by small, estuarine-residentspecies such as glassfish (Ambassidae) and gobies (Gobiidae). Economicallyimportant species such as bream (Sparidae), whiting (Sillaginidae) and mullet (Mugilidae) also contributed substantially (up to 92%) to the catch. Fish assemblages were compared in adjacent patches of intertidal vegetated and unvegetated habitat, at distances varying from 3 to 413 m onto the marsh. Fish densities were highly variable among patches on a marsh, and also varied between sampling periods and between marshes. Species richness and the densities of common species differed little between vegetated and unvegetated habitats. Two species, Mugilogobius stigmaticus and Atherinomorus ogilbyi, had higher densities in vegetated habitat, but only at 1 sampling time and marsh. Fish occurred at all distances onto the marsh. Species richness and the densities of some species were positively related to water depth andnegatively related to distance onto the marsh at one, but not the other marsh. This study provides the first evidence that, despite the relatively low duration and frequency of inundation of marshes, there is widespread use by fish of intertidal saltmarsh flats in Australia.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 07:57:52