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Titolo:
Modeling the effects of fishing and. implications for the design of marineprotected areas: Juvenile fish responses to variations in seafloor habitat
Autore:
Lindholm, JB; Auster, PJ; Ruth, M; Kaufman, L;
Indirizzi:
Univ Connecticut Avery Point, Natl Undersea Res Ctr N Atlantic & Great Lakes, Groton, CT 06340 USA Univ Connecticut Avery Point Groton CT USA 06340 es, Groton, CT 06340 USA Boston Univ, Ctr Energy & Environm Studies, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 & Environm Studies, Boston, MA 02215 USA Boston Univ, Dept Biol, Marine Program, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 iol, Marine Program, Boston, MA 02215 USA
Titolo Testata:
CONSERVATION BIOLOGY
fascicolo: 2, volume: 15, anno: 2001,
pagine: 424 - 437
SICI:
0888-8892(200104)15:2<424:MTEOFA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
COD GADUS-MORHUA; ATLANTIC COD; GEORGES-BANK; SUBSTRATE SELECTION; PREDATION RISK; SETTLEMENT; GROWTH; FISHERIES; SURVIVAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Lindholm, JB Univ Connecticut Avery Point, Natl Undersea Res Ctr N Atlantic & Great Lakes, 1084 Shennecossett Rd, Groton, CT 06340 USA Univ Connecticut Avery Point 1084 Shennecossett Rd Groton CT USA 06340
Citazione:
J.B. Lindholm et al., "Modeling the effects of fishing and. implications for the design of marineprotected areas: Juvenile fish responses to variations in seafloor habitat", CONSER BIOL, 15(2), 2001, pp. 424-437

Abstract

A number of recent studies have linked post-settlement survivorship of Atlantic cod (Gadus morhua) with the complexity of the seafloor to which fish settle. Survivorship is greater in habitats of higher complexity (e.g., pebble-cobble substratum with emergent epifauna > pebble-cobble > sand), wherecover provides shelter from predators. Fishing with mobile gear such as bottom trawls and dredges reduces the complexity of seafloor habitats. We used a dynamic model to (1) link patterns in habitat-mediated survivorship of post-settlement juvenile cod with spatial variations in habitat complexity,(2) simulate habitat change based on fishing activities, and (3) determinethe role of marine protected areas in enhancing recruitment success. Density-dependent natural mortality was specified as three alternative functional response curves to assess the influence of different predator foraging strategies on juvenile survivorship during the first 12 months of demersal existence. We applied the model to a theoretical patch of hard-bottom substrata and to a case study based on seafloor habitat distributions at Stellwagen Bank National Marine Sanctuary (Gulf of Maine, Northwest Atlantic). Our results demonstrate that patterns in the shape of response surfaces that show the relationship between juvenile cod survivorship and density as well asmovement rate were similar regardless of functional response type, that juvenile cod movement rates and post-settlement density were critical for predicting the effects of marine protected-area size on survivorship, and thathabitat change caused by fishing has significant negative effects on juvenile cod survivorship and use of marine protected areas can ameliorate such effects.

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Documento generato il 30/09/20 alle ore 03:06:21