AustralieFrV1, PascalFrancis, Corpus, bibRecord, 003028

Determinants of dietary specialization : a comparison of two sympatric species of sea snakes

Identifieur interne : 003028 ( PascalFrancis/Corpus ); précédent : 003027; suivant : 003029

Determinants of dietary specialization : a comparison of two sympatric species of sea snakes

Auteurs : Francois Brischoux ; Xavier Bonnet ; Richard Shine

Source :

Oikos [ 0030-1299 ] ; 2009.

RBID : Pascal:09-0081728

Descripteurs français

Pascal (Inist)
- Régime alimentaire, Spécialisation, Sympatrie, Prédateur, Proie, Développement, Taille corporelle, Portée, Modèle, Test hypothèse, Ecologie, Habitat, Nouvelle Calédonie, Substrat meuble, Ophidia, Laticauda saintgironsi.

English descriptors

KwdEn :
- Body size, Development, Diet, Ecology, Habitat, Hypothesis test, Models, New Caledonia, Ophidia, Predator, Prey, Soft substrate, Span, Specialization, Sympatry.

Abstract

Why do some predator species specialize on only a single type of prey whereas others take a broad range? One critical determinant may be the ontogenetic range of body sizes of the predator compared to that of its prey. If any single prey taxon spans only part of the range of prey sizes ingestible by the predator, then the predator will be more likely to take multiple prey taxa. We exploit a model system that provides a robust opportunity to test this hypothesis. We studied two sympatric species of predatory sea snakes, similar in size and general ecology that feed on anguilliform fishes from different habitats in the Great Lagoon of New Caledonia. Eel species from soft-bottom habitats must construct their own burrows, and thus tend to be more slender-bodied and less variable in body size than eel species that inhabit variable-sized crevices among hard coral. As a result, a laticaudine sea snake species (Laticauda saintgironsi) that feeds on hard-coral-dwelling eels relies primarily on a single prey species: juveniles take young eels whereas adults consume adult eels of the same species. In contrast, a laticaudine species (L. laticaudata) that forages on soft-bottom eels switches its prey ontogenetically: juveniles take small eel species whereas adults consume large eel species. Thus, habitat-imposed constraints on the range of body sizes within each prey taxon generate a striking difference in the degree of dietary specialization of two closely related, sympatric predator species.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 09-0081728 INIST
ET :	Determinants of dietary specialization : a comparison of two sympatric species of sea snakes
AU :	BRISCHOUX (Francois); BONNET (Xavier); SHINE (Richard)
AF :	Centre d'e'tudes Biologiques de Chizé-CNRS/79360, Villiers en Bois/France (1 aut., 2 aut.); Univ. Francois Rabelais, 3 rue des Tanneurs/37041 Tours/France (1 aut.); Biological Sciences A08, Univ. of Sydney/New South Wales 2006/Australie (3 aut.)
DT :	Publication en série; Niveau analytique
SO :	Oikos; ISSN 0030-1299; Coden OIKSAA; Danemark; Da. 2009; Vol. 118; No. 1; Pp. 145-151; Bibl. 1 p.
LA :	Anglais
EA :	Why do some predator species specialize on only a single type of prey whereas others take a broad range? One critical determinant may be the ontogenetic range of body sizes of the predator compared to that of its prey. If any single prey taxon spans only part of the range of prey sizes ingestible by the predator, then the predator will be more likely to take multiple prey taxa. We exploit a model system that provides a robust opportunity to test this hypothesis. We studied two sympatric species of predatory sea snakes, similar in size and general ecology that feed on anguilliform fishes from different habitats in the Great Lagoon of New Caledonia. Eel species from soft-bottom habitats must construct their own burrows, and thus tend to be more slender-bodied and less variable in body size than eel species that inhabit variable-sized crevices among hard coral. As a result, a laticaudine sea snake species (Laticauda saintgironsi) that feeds on hard-coral-dwelling eels relies primarily on a single prey species: juveniles take young eels whereas adults consume adult eels of the same species. In contrast, a laticaudine species (L. laticaudata) that forages on soft-bottom eels switches its prey ontogenetically: juveniles take small eel species whereas adults consume large eel species. Thus, habitat-imposed constraints on the range of body sizes within each prey taxon generate a striking difference in the degree of dietary specialization of two closely related, sympatric predator species.
CC :	002A14B02C2B
FD :	Régime alimentaire; Spécialisation; Sympatrie; Prédateur; Proie; Développement; Taille corporelle; Portée; Modèle; Test hypothèse; Ecologie; Habitat; Nouvelle Calédonie; Substrat meuble; Ophidia; Laticauda saintgironsi
FG :	Mélanésie; Océanie; Alimentation; Biométrie corporelle; Reptilia; Vertebrata; Elapidae
ED :	Diet; Specialization; Sympatry; Predator; Prey; Development; Body size; Span; Models; Hypothesis test; Ecology; Habitat; New Caledonia; Soft substrate; Ophidia
EG :	Melanesia; Oceania; Feeding; Corporal biometry; Reptilia; Vertebrata
SD :	Régimen alimentario; Especialización; Simpatimetría; Depredador; Presa; Desarrollo; Talla corporal; Alcance; Modelo; Test hipótesis; Ecología; Habitat; Nueva Caledonia; Substrato blando; Ophidia
LO :	INIST-5651.354000184590580160
ID :	09-0081728

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Pascal:09-0081728

Le document en format XML

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<front><div type="abstract" xml:lang="en">Why do some predator species specialize on only a single type of prey whereas others take a broad range? One critical determinant may be the ontogenetic range of body sizes of the predator compared to that of its prey. If any single prey taxon spans only part of the range of prey sizes ingestible by the predator, then the predator will be more likely to take multiple prey taxa. We exploit a model system that provides a robust opportunity to test this hypothesis. We studied two sympatric species of predatory sea snakes, similar in size and general ecology that feed on anguilliform fishes from different habitats in the Great Lagoon of New Caledonia. Eel species from soft-bottom habitats must construct their own burrows, and thus tend to be more slender-bodied and less variable in body size than eel species that inhabit variable-sized crevices among hard coral. As a result, a laticaudine sea snake species (Laticauda saintgironsi) that feeds on hard-coral-dwelling eels relies primarily on a single prey species: juveniles take young eels whereas adults consume adult eels of the same species. In contrast, a laticaudine species (L. laticaudata) that forages on soft-bottom eels switches its prey ontogenetically: juveniles take small eel species whereas adults consume large eel species. Thus, habitat-imposed constraints on the range of body sizes within each prey taxon generate a striking difference in the degree of dietary specialization of two closely related, sympatric predator species.</div>
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<s5>02</s5>
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<fC03 i1="02" i2="X" l="SPA"><s0>Especialización</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Sympatrie</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Sympatry</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Simpatimetría</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Prédateur</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Predator</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Depredador</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Proie</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Prey</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Presa</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Développement</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Development</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Desarrollo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Taille corporelle</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Body size</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Talla corporal</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Portée</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Span</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Alcance</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Modèle</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Models</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Modelo</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Test hypothèse</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Hypothesis test</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Test hipótesis</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Ecologie</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Ecology</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Ecología</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Habitat</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Habitat</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Habitat</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Nouvelle Calédonie</s0>
<s2>NG</s2>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>New Caledonia</s0>
<s2>NG</s2>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Nueva Caledonia</s0>
<s2>NG</s2>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Substrat meuble</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Soft substrate</s0>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Substrato blando</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Ophidia</s0>
<s2>NS</s2>
<s5>49</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Ophidia</s0>
<s2>NS</s2>
<s5>49</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Ophidia</s0>
<s2>NS</s2>
<s5>49</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Laticauda saintgironsi</s0>
<s4>INC</s4>
<s5>64</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Mélanésie</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Melanesia</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Melanesia</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Océanie</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Oceania</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Oceania</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE"><s0>Alimentation</s0>
<s5>17</s5>
</fC07>
<fC07 i1="03" i2="X" l="ENG"><s0>Feeding</s0>
<s5>17</s5>
</fC07>
<fC07 i1="03" i2="X" l="SPA"><s0>Alimentación</s0>
<s5>17</s5>
</fC07>
<fC07 i1="04" i2="X" l="FRE"><s0>Biométrie corporelle</s0>
<s5>18</s5>
</fC07>
<fC07 i1="04" i2="X" l="ENG"><s0>Corporal biometry</s0>
<s5>18</s5>
</fC07>
<fC07 i1="04" i2="X" l="SPA"><s0>Biometría corporal</s0>
<s5>18</s5>
</fC07>
<fC07 i1="05" i2="X" l="FRE"><s0>Reptilia</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="ENG"><s0>Reptilia</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="SPA"><s0>Reptilia</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="FRE"><s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="ENG"><s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="SPA"><s0>Vertebrata</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="FRE"><s0>Elapidae</s0>
<s4>INC</s4>
<s5>70</s5>
</fC07>
<fN21><s1>061</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 09-0081728 INIST</NO>
<ET>Determinants of dietary specialization : a comparison of two sympatric species of sea snakes</ET>
<AU>BRISCHOUX (Francois); BONNET (Xavier); SHINE (Richard)</AU>
<AF>Centre d'e'tudes Biologiques de Chizé-CNRS/79360, Villiers en Bois/France (1 aut., 2 aut.); Univ. Francois Rabelais, 3 rue des Tanneurs/37041 Tours/France (1 aut.); Biological Sciences A08, Univ. of Sydney/New South Wales 2006/Australie (3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Oikos; ISSN 0030-1299; Coden OIKSAA; Danemark; Da. 2009; Vol. 118; No. 1; Pp. 145-151; Bibl. 1 p.</SO>
<LA>Anglais</LA>
<EA>Why do some predator species specialize on only a single type of prey whereas others take a broad range? One critical determinant may be the ontogenetic range of body sizes of the predator compared to that of its prey. If any single prey taxon spans only part of the range of prey sizes ingestible by the predator, then the predator will be more likely to take multiple prey taxa. We exploit a model system that provides a robust opportunity to test this hypothesis. We studied two sympatric species of predatory sea snakes, similar in size and general ecology that feed on anguilliform fishes from different habitats in the Great Lagoon of New Caledonia. Eel species from soft-bottom habitats must construct their own burrows, and thus tend to be more slender-bodied and less variable in body size than eel species that inhabit variable-sized crevices among hard coral. As a result, a laticaudine sea snake species (Laticauda saintgironsi) that feeds on hard-coral-dwelling eels relies primarily on a single prey species: juveniles take young eels whereas adults consume adult eels of the same species. In contrast, a laticaudine species (L. laticaudata) that forages on soft-bottom eels switches its prey ontogenetically: juveniles take small eel species whereas adults consume large eel species. Thus, habitat-imposed constraints on the range of body sizes within each prey taxon generate a striking difference in the degree of dietary specialization of two closely related, sympatric predator species.</EA>
<CC>002A14B02C2B</CC>
<FD>Régime alimentaire; Spécialisation; Sympatrie; Prédateur; Proie; Développement; Taille corporelle; Portée; Modèle; Test hypothèse; Ecologie; Habitat; Nouvelle Calédonie; Substrat meuble; Ophidia; Laticauda saintgironsi</FD>
<FG>Mélanésie; Océanie; Alimentation; Biométrie corporelle; Reptilia; Vertebrata; Elapidae</FG>
<ED>Diet; Specialization; Sympatry; Predator; Prey; Development; Body size; Span; Models; Hypothesis test; Ecology; Habitat; New Caledonia; Soft substrate; Ophidia</ED>
<EG>Melanesia; Oceania; Feeding; Corporal biometry; Reptilia; Vertebrata</EG>
<SD>Régimen alimentario; Especialización; Simpatimetría; Depredador; Presa; Desarrollo; Talla corporal; Alcance; Modelo; Test hipótesis; Ecología; Habitat; Nueva Caledonia; Substrato blando; Ophidia</SD>
<LO>INIST-5651.354000184590580160</LO>
<ID>09-0081728</ID>
</server>
</inist>
</record>

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Determinants of dietary specialization : a comparison of two sympatric species of sea snakes

Determinants of dietary specialization : a comparison of two sympatric species of sea snakes

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