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Titolo:
Long-term assessment of settlement and growth of juvenile winter flounder (Pseudopleuronectes americanus) in New Jersey estuaries
Autore:
Sogard, SM; Able, KW; Hagan, SM;
Indirizzi:
Oregon State Univ, Hatfield Marine Sci Ctr, Natl Marine Fisheries Serv, Newport, OR 97365 USA Oregon State Univ Newport OR USA 97365 heries Serv, Newport, OR 97365 USA Rutgers State Univ, Marine Field Stn, Tuckerton, NJ 08087 USA Rutgers State Univ Tuckerton NJ USA 08087 ld Stn, Tuckerton, NJ 08087 USA
Titolo Testata:
JOURNAL OF SEA RESEARCH
fascicolo: 3-4, volume: 45, anno: 2001,
pagine: 189 - 204
SICI:
1385-1101(200106)45:3-4<189:LAOSAG>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLAICE PLEURONECTES-PLATESSA; SOLEA-SOLEA L; OTOLITH MICROSTRUCTURE; HABITAT QUALITY; WADDEN SEA; NORTH-SEA; FISHES; RECRUITMENT; SIZE; PREDATION;
Keywords:
growth; winter flounders; metamorphosis; settlement; temperature;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Sogard, SM Oregon State Univ, Hatfield Marine Sci Ctr, Natl Marine Fisheries Serv, 2030 Marine Sci Dr, Newport, OR 97365 USA Oregon State Univ 2030 Marine Sci Dr Newport OR USA 97365 5 USA
Citazione:
S.M. Sogard et al., "Long-term assessment of settlement and growth of juvenile winter flounder (Pseudopleuronectes americanus) in New Jersey estuaries", J SEA RES, 45(3-4), 2001, pp. 189-204

Abstract

We examined patterns of metamorphosis, settlement, and growth for young-of-the-year winter flounder over a ten year period (1990-1999) in four estuaries spanning the coast of New Jersey, USA, with the objective to determine the spatial and temporal coherence in these processes. We hypothesised thatthese processes could be influenced by large-scale climatic factors such as temperature and small-scale, local factors such as predator and prey abundances and differences associated with the localised population structure of winter flounder. Newly settled juveniles were collected in late May/earlyJune each year. Increment counts on sagittal otoliths were used to determine the date of metamorphosis, and increment widths were used to estimate growth rates at two times, just after settlement and just prior to capture. Ahigh level of consistency in spatial patterns among four individual estuaries was evident, and was largely driven by the northernmost site, Sandy Hook, which had higher fish densities and later metamorphosis than the three other sites, and faster growth rates than the two mid-coast sites (Barnegat Bay and Great Bay). In contrast to spatial patterns, consistent temporal patterns were evident only in the timing of metamorphosis, which was delayed in colder years at all sites. Weekly plankton sampling over the same ten year period at one site (Great Bay) yielded winter flounder larvae during a relatively narrow period in spring, with a later peak of abundance in colderyears, in agreement with back-calculated dates of metamorphosis for settled juveniles. These patterns suggest that the timing of settlement is drivenby large-scale climatic factors that influence the timing of spawning and/or larval development. Interannual variability in densities and growth rates, however, appeared to be independent at each site, indicating control by local environmental factors or genetic differences among local populations. The spatial consistency of growth rates suggests that appropriate nursery areas can be readily identified for juvenile winter flounder. However, subsequent recruitment needs to be verified at the level of local populations to identify contributing source habitats. (C) 2001 Elsevier Science B.V. Allrights reserved.

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Documento generato il 04/04/20 alle ore 15:31:55