Cold hardiness in molluscs / Armelle Ansart ; Philippe Vernon in Acta Oecologica, Vol.24, n°2 ([01/01/2003])

Public ISBD [article]  inActa Oecologica > Vol.24, n°2 [01/01/2003] . - p.95-102 Titre : Cold hardiness in molluscs Type de document : Article Auteurs : Armelle Ansart ; Philippe Vernon Article en page(s) : p.95-102 Langues : Français (fre) Catégories : [Thesagri] froid Note de contenu : Molluscs inhabit all types of environments: seawater, intertidal zone, freshwater and land, and of course may have to deal with subzero temperatures. Ectotherm animals survive cold conditions by avoiding it by extensive supercooling (freezing avoidant species) or by bearing the freezing of their extracellular body fluids (freezing tolerant species). Although some studies on cold hardiness are available for intertidal molluscs, they are scarce for freshwater and terrestrial ones. Molluscs often exhibit intermediary levels of cold hardiness, with a moderate or low ability to supercool and a limited survival to the freezing of their tissues. Several factors could be involved: their dependence on water, their ability to enter dormancy, the probability of inoculative freezing in their environment, etc. Size is an important parameter in the development of cold hardiness abilities: it influences supercooling ability in land snails, which are rather freezing avoidant and survival to ice formation in intertidal organisms, which generally tolerate freezing. [article] Cold hardiness in molluscs [Article] / Armelle Ansart ; Philippe Vernon . - p.95-102. Langues : Français (fre) in Acta Oecologica > Vol.24, n°2 [01/01/2003] . - p.95-102 Catégories : [Thesagri] froid Note de contenu : Molluscs inhabit all types of environments: seawater, intertidal zone, freshwater and land, and of course may have to deal with subzero temperatures. Ectotherm animals survive cold conditions by avoiding it by extensive supercooling (freezing avoidant species) or by bearing the freezing of their extracellular body fluids (freezing tolerant species). Although some studies on cold hardiness are available for intertidal molluscs, they are scarce for freshwater and terrestrial ones. Molluscs often exhibit intermediary levels of cold hardiness, with a moderate or low ability to supercool and a limited survival to the freezing of their tissues. Several factors could be involved: their dependence on water, their ability to enter dormancy, the probability of inoculative freezing in their environment, etc. Size is an important parameter in the development of cold hardiness abilities: it influences supercooling ability in land snails, which are rather freezing avoidant and survival to ice formation in intertidal organisms, which generally tolerate freezing.

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
REV-00000759	Vol.24, n°2 - 01/01/2003	Revue	Archives sous-sol	Documentaires	Disponible

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