A stage‐structured model to predict the effect of temperature and salinity on glass eel Anguilla anguilla pigmentation development

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Abstract:

The pigmentation development process of glass eels Anguilla anguilla from stage VB to VIA3 was modelled by gamma cumulative functions. These functions varied with respect to the factors temperature and salinity whose effects were adjusted by beta functions. Temperature was shown to accelerate pigmentation, while salinity acted as a secondary factor slowing down the pigmentation. The model fits the development of 15 samples kept at various temperatures and salinities in the Vilaine River, as well as samples monitored at other dates and places in Europe. It allows the prediction of the duration of estuarine residency for glass eels, in winter and spring, in the Atlantic estuaries.

Keywords: Anguilla anguilla; European eel; glass eel; pigment stage; salinity; temperature

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.0022-1112.2005.00798.x

Affiliations: 1: Institution d’ Aménagement de la Vilaine, 56130 La Roche-Bernard, France, 2: Dipartimento di Biologia, Università degli Studi “Tor Vergata”, Via della Ricerca Scientifica, 00133 Rome, Italy and 3: CEMAGREF, Unité Ressources Aquatiques Continentales, F-33612 Cestas Cedex, France

Publication date: October 1, 2005

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