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Titolo:
EFFECTS OF HABITAT ON SETTLEMENT, GROWTH, AND POSTSETTLEMENT SURVIVALOF ATLANTIC COD (GADUS-MORHUA)
Autore:
TUPPER M; BOUTILIER RG;
Indirizzi:
MCGILL UNIV,BELLAIRS RES INST ST JAMES BARBADOS DALHOUSIE UNIV,DEPT BIOL HALIFAX NS B3H 4J1 CANADA UNIV CAMBRIDGE,DEPT ZOOL CAMBRIDGE CB2 3EJ ENGLAND
Titolo Testata:
Canadian journal of fisheries and aquatic sciences
fascicolo: 9, volume: 52, anno: 1995,
pagine: 1834 - 1841
SICI:
0706-652X(1995)52:9<1834:EOHOSG>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORAL-REEF FISH; PREDATION RISK; MARINE FISH; RECRUITMENT; POPULATION; SIZE; MORTALITY; DYNAMICS; SHELTER; AVAILABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
M. Tupper e R.G. Boutilier, "EFFECTS OF HABITAT ON SETTLEMENT, GROWTH, AND POSTSETTLEMENT SURVIVALOF ATLANTIC COD (GADUS-MORHUA)", Canadian journal of fisheries and aquatic sciences, 52(9), 1995, pp. 1834-1841

Abstract

Settlement and growth of age 0+ cod were monitored using snorkel and self-contained underwater breathing apparatus (SCUBA) in four distincthabitat types (sand, seagrass, cobble, and rock reef) in St. Margaret's Bay, Nova Scotia. Newly settled cod were marked with acrylic dye, allowing repeated visual length estimates of individual fish. Settlement of cod did not differ between habitat types, but postsettlement survival and subsequent juvenile densities were higher in more structurally complex habitats. These differences appear to be due to increased shelter availability and decreased predator efficiency in structurally complex habitats. Growth rate was highest in seagrass beds, while the efficiency of cod predators was lowest and cod survival was highest on rocky reefs and cobble bottoms. Thus, trade-offs occur between energy gain and predation risk. In St. Margaret's Bay, the population structure of Atlantic cod may be less influenced by patterns of larval supplythan by postsettlement processes such as habitat-specific growth and mortality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 20:57:36