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one publication added to basket [71456]

A spatially explicit, individual-based model to assess the role of estuarine nurseries in the early life history of North Sea herring, Clupea harengus Maes, J.; Limburg, K.E.; Van de Putte, A.; Ollevier, F.P. (2005). A spatially explicit, individual-based model to assess the role of estuarine nurseries in the early life history of North Sea herring, Clupea harengus. Fish. Oceanogr. 14(1): 17-31. dx.doi.org/10.1111/j.1365-2419.2004.00300.x In: Fisheries Oceanography. Blackwell Science: Oxford. ISSN 1054-6006; e-ISSN 1365-2419

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 68285 [ download pdf ]

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Trefwoorden

Behaviour > Feeding behaviour Behaviour > Migrations Developmental stages > Juveniles Environmental effects > Temperature effects Habitat selection Life history Metabolism Models Nursery grounds Population functions > Growth Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Clupea harengus Linnaeus, 1758 [WoRMS] België, Zeeschelde [Marine Regions] Marien/Kust; Brak water

Author keywords

estuarine fish migration; feeding behavior; habitat selection; herring; life-history theory; predation risk

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Auteurs		Top
Maes, J. Limburg, K.E. Van de Putte, A. Ollevier, F.P.

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Abstract

Herring (Clupea harengus) enter and remain within North Sea estuaries during well-defined periods of their early life history. The costs and benefits of the migrations between offshore spawning grounds and upper, low-salinity zones of estuarine nurseries are identified using a dynamic state-variable model, in which the fitness of an individual is maximized by selecting the most profitable habitat. Spatio-temporal gradients in temperature, turbidity, food availability and predation risk simulate the environment. We modeled predation as a function of temperature, the optical properties of the ambient water, the time allocation of feeding and the abundance of whiting (Merlangius merlangus). Growth and metabolic costs were assessed using a bioenergetic model. Model runs using real input data for the Scheldt estuary (Belgium, The Netherlands) and the southern North Sea show that estuarine residence results in fitter individuals through a considerable increase in survival probability of age-0 fish. Young herring pay for their migration into safer estuarine water by foregoing growth opportunities at sea. We suggest that temperature and, in particular, the time lag between estuarine and seawater temperatures, acts as a basic cue for herring to navigate in the heterogeneous space between the offshore spawning grounds at sea and the oligohaline nursery zone in estuaries.

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