Anti‐Predator Benefits of Mixed‐Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest
Identifieur interne : 000414 ( Main/Exploration ); précédent : 000413; suivant : 000415Anti‐Predator Benefits of Mixed‐Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest
Auteurs : Christina A. D. Semeniuk [Canada] ; Lawrence M. Dill [Canada]Source :
- Ethology [ 0179-1613 ] ; 2006-01.
Abstract
Heterospecific grouping can sometimes provide greater antipredator benefits to individuals than grouping with conspecifics. We explored the potential benefits of mixed‐species group resting in the cowtail stingray, Pastinachus sephen, and the reticulate whipray, Himantura uarnak, in Shark Bay, Western Australia. From focal follow data on individual resting choice, we first ascertained that cowtails preferred to rest with heterospecifics, as they chose to settle next to whiprays more often than to pass them (with the opposite trend observed for conspecifics). In addition, we determined from filmed boat transects that cowtails formed larger hetero‐ than monospecific groups despite the low density of whiprays. Possible benefits accrued by the cowtail were investigated in terms of predator protection. Whiprays responded earlier than cowtails to a mock predator (boat), and were most frequently the first to respond when in a mixed group. Thus, cowtails may benefit from grouping with heterospecifics by receiving earlier warning of a predator's approach. A decoy experiment using model whiprays demonstrated that cowtails were more willing to rest with models with relatively longer tails (controlled for body size). Ray tails, which are equipped with a mechanoreceptor capable of detecting predators, may constitute an important secondary means of predator detection aside from early warning. This contention is supported by the observation that stingrays mainly form resting groups when their visual ability is likely to be impaired by environmental conditions, and that tail length is negatively allometric with body size, suggesting its importance in vulnerable early life stages. If the efficacy of the mechanoreceptor increases with tail length, then cowtails may have further improved their likelihood of detecting predators by grouping with longer‐tailed heterospecifics.
Url:
DOI: 10.1111/j.1439-0310.2006.01108.x
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000792
- to stream Istex, to step Curation: 000792
- to stream Istex, to step Checkpoint: 000174
- to stream Main, to step Merge: 000414
- to stream Main, to step Curation: 000414
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Anti‐Predator Benefits of Mixed‐Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest</title><author><name sortKey="Semeniuk, Christina A D" sort="Semeniuk, Christina A D" uniqKey="Semeniuk C" first="Christina A. D." last="Semeniuk">Christina A. D. Semeniuk</name></author><author><name sortKey="Dill, Lawrence M" sort="Dill, Lawrence M" uniqKey="Dill L" first="Lawrence M." last="Dill">Lawrence M. Dill</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:8E850252F2010FC8D471D1E5974B1A23C3BEE6CB</idno><date when="2006" year="2006">2006</date><idno type="doi">10.1111/j.1439-0310.2006.01108.x</idno><idno type="url">https://api.istex.fr/document/8E850252F2010FC8D471D1E5974B1A23C3BEE6CB/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000792</idno><idno type="wicri:Area/Istex/Curation">000792</idno><idno type="wicri:Area/Istex/Checkpoint">000174</idno><idno type="wicri:doubleKey">0179-1613:2006:Semeniuk C:anti:predator:benefits</idno><idno type="wicri:Area/Main/Merge">000414</idno><idno type="wicri:Area/Main/Curation">000414</idno><idno type="wicri:Area/Main/Exploration">000414</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Anti‐Predator Benefits of Mixed‐Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest</title><author><name sortKey="Semeniuk, Christina A D" sort="Semeniuk, Christina A D" uniqKey="Semeniuk C" first="Christina A. D." last="Semeniuk">Christina A. D. Semeniuk</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC</wicri:regionArea><wicri:noRegion>BC</wicri:noRegion></affiliation></author><author><name sortKey="Dill, Lawrence M" sort="Dill, Lawrence M" uniqKey="Dill L" first="Lawrence M." last="Dill">Lawrence M. Dill</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC</wicri:regionArea><wicri:noRegion>BC</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Ethology</title><idno type="ISSN">0179-1613</idno><idno type="eISSN">1439-0310</idno><imprint><publisher>Blackwell Verlag, GmbH</publisher><pubPlace>Berlin, Germany</pubPlace><date type="published" when="2006-01">2006-01</date><biblScope unit="volume">112</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="33">33</biblScope><biblScope unit="page" to="43">43</biblScope></imprint><idno type="ISSN">0179-1613</idno></series><idno type="istex">8E850252F2010FC8D471D1E5974B1A23C3BEE6CB</idno><idno type="DOI">10.1111/j.1439-0310.2006.01108.x</idno><idno type="ArticleID">ETH1108</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0179-1613</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Heterospecific grouping can sometimes provide greater antipredator benefits to individuals than grouping with conspecifics. We explored the potential benefits of mixed‐species group resting in the cowtail stingray, Pastinachus sephen, and the reticulate whipray, Himantura uarnak, in Shark Bay, Western Australia. From focal follow data on individual resting choice, we first ascertained that cowtails preferred to rest with heterospecifics, as they chose to settle next to whiprays more often than to pass them (with the opposite trend observed for conspecifics). In addition, we determined from filmed boat transects that cowtails formed larger hetero‐ than monospecific groups despite the low density of whiprays. Possible benefits accrued by the cowtail were investigated in terms of predator protection. Whiprays responded earlier than cowtails to a mock predator (boat), and were most frequently the first to respond when in a mixed group. Thus, cowtails may benefit from grouping with heterospecifics by receiving earlier warning of a predator's approach. A decoy experiment using model whiprays demonstrated that cowtails were more willing to rest with models with relatively longer tails (controlled for body size). Ray tails, which are equipped with a mechanoreceptor capable of detecting predators, may constitute an important secondary means of predator detection aside from early warning. This contention is supported by the observation that stingrays mainly form resting groups when their visual ability is likely to be impaired by environmental conditions, and that tail length is negatively allometric with body size, suggesting its importance in vulnerable early life stages. If the efficacy of the mechanoreceptor increases with tail length, then cowtails may have further improved their likelihood of detecting predators by grouping with longer‐tailed heterospecifics.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Semeniuk, Christina A D" sort="Semeniuk, Christina A D" uniqKey="Semeniuk C" first="Christina A. D." last="Semeniuk">Christina A. D. Semeniuk</name></noRegion><name sortKey="Dill, Lawrence M" sort="Dill, Lawrence M" uniqKey="Dill L" first="Lawrence M." last="Dill">Lawrence M. Dill</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/ScalaireV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000414 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000414 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Eau
|area= ScalaireV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:8E850252F2010FC8D471D1E5974B1A23C3BEE6CB
|texte= Anti‐Predator Benefits of Mixed‐Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest
}}
| This area was generated with Dilib version V0.6.27. |  |