Diversity of behavioural patterns displayed by a summer feeding aggregation of Atlantic sturgeon in the intertidal region of Minas Basin, Bay of Fundy, Canada
Identifieur interne : 000242 ( Main/Exploration ); précédent : 000241; suivant : 000243Diversity of behavioural patterns displayed by a summer feeding aggregation of Atlantic sturgeon in the intertidal region of Minas Basin, Bay of Fundy, Canada
Auteurs : Montana F. Mclean [Canada] ; Colin A. Simpfendorfer [Australie] ; Michelle R. Heupel [Australie] ; Michael J. Dadswell [Canada] ; Michael J. W. Stokesbury [Canada]Source :
- Marine ecology. Progress series : (Halstenbek) [ 0171-8630 ] ; 2014.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Canada.
- topic : Acoustique, Milieu marin.
English descriptors
- KwdEn :
Abstract
Quantifying animal movements can reveal spatial and temporal patterns of habitat use and may improve our understanding of the foraging strategies of marine predators where direct observations of feeding behaviour are rare or impossible because of turbidity. Fine-scale movement data from 25 acoustically tagged Atlantic sturgeon Acipenser oxyrinchus (Mitchill, 1815) were gathered using a Vemco Positioning System array of hydroacoustic receivers in the intertidal zone of Minas Basin, Bay of Fundy, Canada, during summer 2011. From these data, sturgeon relocations and movement trajectories were determined. Sturgeon movement trajectories were categorized into 3 movement types by analyzing 4 calculated metric variables including (1) mean distance between successive relocations; (2) mean relative angle or 'turning angle'; (3) mean rate of movement (ROM; m s-1); and (4) a linearity ratio. Movement Type 1 trajectories were characteristically slow and winding, with short steps between relocation, whereas Type 2 movements were fast and tortuous. Movement Type 3 trajectories were fast and linear, with large steps between relocations. Considerable variability in movement type was recognized with 11 individuals performing all 3 types of movement during the monitoring period. Movement Types 1 and 2 occurred primarily over the intertidal zone, where sediment type was comprised of larger sand and sandy/silt particles. This association with larger grain size may coincide with a diet preference for sand-tube dwelling polychaetes and indicates the importance of the intertidal zone to foraging Atlantic sturgeon. All movement types were equally likely to occur throughout a 24 h day and throughout all tidal stages; however, there was higher overall crepuscular activity which revealed a temporal pattern not previously recognized for Atlantic sturgeon.
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Mclean</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Biology Department, Acadia University, 33 Westwood Ave. Wolfville</s1><s2>Nova Scotia B4P 2R6</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Nova Scotia B4P 2R6</wicri:noRegion></affiliation></author><author><name sortKey="Simpfendorfer, Colin A" sort="Simpfendorfer, Colin A" uniqKey="Simpfendorfer C" first="Colin A." last="Simpfendorfer">Colin A. Simpfendorfer</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Centre for Sustainable Tropical Fisheries and Aquaculture, School of Earth and Environmental Sciences, James Cook University</s1><s2>Townsville, Queensland 4811</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Townsville, Queensland 4811</wicri:noRegion></affiliation></author><author><name sortKey="Heupel, Michelle R" sort="Heupel, Michelle R" uniqKey="Heupel M" first="Michelle R." last="Heupel">Michelle R. 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Dadswell</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Biology Department, Acadia University, 33 Westwood Ave. Wolfville</s1><s2>Nova Scotia B4P 2R6</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Nova Scotia B4P 2R6</wicri:noRegion></affiliation></author><author><name sortKey="Stokesbury, Michael J W" sort="Stokesbury, Michael J W" uniqKey="Stokesbury M" first="Michael J. W." last="Stokesbury">Michael J. W. Stokesbury</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Biology Department, Acadia University, 33 Westwood Ave. Wolfville</s1><s2>Nova Scotia B4P 2R6</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Nova Scotia B4P 2R6</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Marine ecology. Progress series : (Halstenbek)</title><title level="j" type="abbreviated">Mar. ecol., Prog. ser. : (Halstenbek)</title><idno type="ISSN">0171-8630</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Marine ecology. Progress series : (Halstenbek)</title><title level="j" type="abbreviated">Mar. ecol., Prog. ser. : (Halstenbek)</title><idno type="ISSN">0171-8630</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acipenser sturio</term><term>Acoustics</term><term>Activity</term><term>Aggregation</term><term>Bay of Fundy</term><term>Behavior</term><term>Canada</term><term>Diversity</term><term>Feeding</term><term>Intertidal zone</term><term>Marine environment</term><term>Positioning</term><term>Range finding</term><term>Spatial distribution</term><term>Spatial variation</term><term>Time variation</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Diversité</term><term>Comportement</term><term>Alimentation</term><term>Agrégation</term><term>Zone intertidale</term><term>Acoustique</term><term>Télémétrie</term><term>Positionnement</term><term>Activité</term><term>Variation spatiale</term><term>Répartition spatiale</term><term>Variation temporelle</term><term>Milieu marin</term><term>Baie Fundy</term><term>Canada</term><term>Acipenser sturio</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Acoustique</term><term>Milieu marin</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Quantifying animal movements can reveal spatial and temporal patterns of habitat use and may improve our understanding of the foraging strategies of marine predators where direct observations of feeding behaviour are rare or impossible because of turbidity. Fine-scale movement data from 25 acoustically tagged Atlantic sturgeon Acipenser oxyrinchus (Mitchill, 1815) were gathered using a Vemco Positioning System array of hydroacoustic receivers in the intertidal zone of Minas Basin, Bay of Fundy, Canada, during summer 2011. From these data, sturgeon relocations and movement trajectories were determined. Sturgeon movement trajectories were categorized into 3 movement types by analyzing 4 calculated metric variables including (1) mean distance between successive relocations; (2) mean relative angle or 'turning angle'; (3) mean rate of movement (ROM; m s<sup>-1</sup>); and (4) a linearity ratio. Movement Type 1 trajectories were characteristically slow and winding, with short steps between relocation, whereas Type 2 movements were fast and tortuous. Movement Type 3 trajectories were fast and linear, with large steps between relocations. Considerable variability in movement type was recognized with 11 individuals performing all 3 types of movement during the monitoring period. Movement Types 1 and 2 occurred primarily over the intertidal zone, where sediment type was comprised of larger sand and sandy/silt particles. This association with larger grain size may coincide with a diet preference for sand-tube dwelling polychaetes and indicates the importance of the intertidal zone to foraging Atlantic sturgeon. All movement types were equally likely to occur throughout a 24 h day and throughout all tidal stages; however, there was higher overall crepuscular activity which revealed a temporal pattern not previously recognized for Atlantic sturgeon.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Mclean, Montana F" sort="Mclean, Montana F" uniqKey="Mclean M" first="Montana F." last="Mclean">Montana F. Mclean</name></noRegion><name sortKey="Dadswell, Michael J" sort="Dadswell, Michael J" uniqKey="Dadswell M" first="Michael J." last="Dadswell">Michael J. Dadswell</name><name sortKey="Stokesbury, Michael J W" sort="Stokesbury, Michael J W" uniqKey="Stokesbury M" first="Michael J. W." last="Stokesbury">Michael J. W. Stokesbury</name></country><country name="Australie"><noRegion><name sortKey="Simpfendorfer, Colin A" sort="Simpfendorfer, Colin A" uniqKey="Simpfendorfer C" first="Colin A." last="Simpfendorfer">Colin A. Simpfendorfer</name></noRegion><name sortKey="Heupel, Michelle R" sort="Heupel, Michelle R" uniqKey="Heupel M" first="Michelle R." last="Heupel">Michelle R. Heupel</name><name sortKey="Heupel, Michelle R" sort="Heupel, Michelle R" uniqKey="Heupel M" first="Michelle R." last="Heupel">Michelle R. Heupel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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