Abstract
Respiratory rates of Anomalocera patersoni, sampled in a temperate area (Gulf of Marseilles, France), during the cold period, are measured and compared to those of individuals of the same species from subtropical latitudes (South Morocco, Canarian area). Males, females and young stages have been examined to estimate the temperature-metabolism and weight-metabolism relationships as a function of climatic adaptation. Small individuals consume oxygen at a higher rate than large ones; males at a higher rate than females. Optimum temperature ranges are different for subtropical and temperate populations: the upper limit is about 14° to 5°C for Mediterranean, and about 18° to 19°C for subtropical individuals. At 14° and 18°C, a positive linear correlation exists when log respiration is plotted against log dry weight. For the temperature conditions prevailing in a given habitat, the regression coefficients are strongest. A. patersoni appears to be adapted metabolically to the average temperature of its habitat.
Résumé
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1.
L'étude comparée du métabolisme respiratoire d'Anomalocera patersoni pêché sous deux latitudes différentes montre les faits suivants.
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2.
La consommation d'oxygène par unité de poids est plus élevéc chez les jeunes que chez les adultes.
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3.
Pour l'ensemble des copépodes des régions marocaines et sud-canariennes il existe une corrélation entre le logarithme de la respiration et le logarithme du poids aux diverses températures envisagées; par contre, chez les A. patersoni de Méditerranée, une telle corrélation n'est significative qu'aux deux températures de 14° et 18°C.
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4.
Le coefficient de régression est maximum à 18°C pour les formes subtropicales et à 14°C pour les formes méditerranéennes, c'est à dire pour une température voisine de la température moyenne du milieu.
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5.
A. patersoni semble done capable d'adapter l'intensité de son métabolisme respiratoire aux conditions thermiques différentes résultant d'une répartition latitudinale étendue. L'adaptation optimale est réalisée aux environs de 14°C chez les formes des eaux tempérées et de 18°C chez les formes des eaux subtropicales.
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Communicated by J. M. Peres, Marseille
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Champalbert, G. Métabolisme respiratoire d'Anomalocera patersoni (Copepoda: Pontellidae). Marine Biology 19, 315–319 (1973). https://doi.org/10.1007/BF00348900
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DOI: https://doi.org/10.1007/BF00348900