Insular mammalian populations living in areas of small size are often characterized by a drastic change in body mass compared to related continental populations or species. Generally, small mammals (less than 100 g) evolve into giant forms while large mammals (up to 100 g) evolve into dwarf forms. These changes, coupled with changes in other life, behavioural, physiological or demographic traits are referred to generally as the insular syndrome. We tested in this study the relative contribution of three factors - area of island, numbers of competitor species and number of predator species - to changes in body size of the woodmouse (Apodemus sylvaticus) in the Western Mediterranean Sea. Our results, based on a comparative analysis using the phylogenetic independent contrasts method, indicate that the increase in body size is related both to the decrease of island size and to the lower number of predator species. A decrease of competitor species does not seem to have an important effect.

Michaux J.R., De Bellocq J.G., Sara' M., Morand S. (2002). Body size increase in insular rodent populations: A role for predators?. GLOBAL ECOLOGY AND BIOGEOGRAPHY, 11(5), 427-436 [10.1046/j.1466-822x.2002.00301.x].

Body size increase in insular rodent populations: A role for predators?

Sara' M.
Penultimo
Writing – Original Draft Preparation
;
2002-09-01

Abstract

Insular mammalian populations living in areas of small size are often characterized by a drastic change in body mass compared to related continental populations or species. Generally, small mammals (less than 100 g) evolve into giant forms while large mammals (up to 100 g) evolve into dwarf forms. These changes, coupled with changes in other life, behavioural, physiological or demographic traits are referred to generally as the insular syndrome. We tested in this study the relative contribution of three factors - area of island, numbers of competitor species and number of predator species - to changes in body size of the woodmouse (Apodemus sylvaticus) in the Western Mediterranean Sea. Our results, based on a comparative analysis using the phylogenetic independent contrasts method, indicate that the increase in body size is related both to the decrease of island size and to the lower number of predator species. A decrease of competitor species does not seem to have an important effect.
set-2002
Settore BIO/05 - Zoologia
Michaux J.R., De Bellocq J.G., Sara' M., Morand S. (2002). Body size increase in insular rodent populations: A role for predators?. GLOBAL ECOLOGY AND BIOGEOGRAPHY, 11(5), 427-436 [10.1046/j.1466-822x.2002.00301.x].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/516058
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