Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river
Identifieur interne : 001302 ( Istex/Corpus ); précédent : 001301; suivant : 001303Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river
Auteurs : Chris T. Walsh ; Ivars V. Reinfelds ; Charles A. Gray ; Ron J. West ; Dylan E. Van Der Meulen ; James R. CraigSource :
- Ecology of Freshwater Fish [ 0906-6691 ] ; 2012-01.
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Abstract
Abstract – Understanding movement patterns and habitat utilisation is critical for the management of diadromous fishes. An acoustic telemetry array was used to monitor 33 estuary perch, Macquaria colonorum and 39 Australian bass, Macquaria novemaculeata in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged M. novemaculeata were detected for a considerably shorter period than M. colonorum, and evidence suggested that fishing pressure may have impacted on their survival. Macquaria colonorum displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, M. colonorum individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, M. novemaculeata were distributed in shallow (<2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like M. colonorum, M. novemaculeata made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some M. novemaculeata individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.
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DOI: 10.1111/j.1600-0633.2011.00534.x
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Reinfelds</name><affiliation><mods:affiliation>NSW Office of Water, Wollongong, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="Gray, Charles A" sort="Gray, Charles A" uniqKey="Gray C" first="Charles A." last="Gray">Charles A. Gray</name><affiliation><mods:affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="West, Ron J" sort="West, Ron J" uniqKey="West R" first="Ron J." last="West">Ron J. West</name><affiliation><mods:affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="Van Der Meulen, Dylan E" sort="Van Der Meulen, Dylan E" uniqKey="Van Der Meulen D" first="Dylan E." last="Van Der Meulen">Dylan E. 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Gray</name><affiliation><mods:affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="West, Ron J" sort="West, Ron J" uniqKey="West R" first="Ron J." last="West">Ron J. West</name><affiliation><mods:affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="Van Der Meulen, Dylan E" sort="Van Der Meulen, Dylan E" uniqKey="Van Der Meulen D" first="Dylan E." last="Van Der Meulen">Dylan E. Van Der Meulen</name><affiliation><mods:affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</mods:affiliation></affiliation></author><author><name sortKey="Craig, James R" sort="Craig, James R" uniqKey="Craig J" first="James R." last="Craig">James R. Craig</name><affiliation><mods:affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Ecology of Freshwater Fish</title><idno type="ISSN">0906-6691</idno><idno type="eISSN">1600-0633</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2012-01">2012-01</date><biblScope unit="volume">21</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="145">145</biblScope><biblScope unit="page" to="159">159</biblScope></imprint><idno type="ISSN">0906-6691</idno></series><idno type="istex">6997A891B12BD5D1A0BD21DBB4F21D14CF59E440</idno><idno type="DOI">10.1111/j.1600-0633.2011.00534.x</idno><idno type="ArticleID">EFF534</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0906-6691</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Macquaria colonorum</term><term>Macquaria novemaculeata</term><term>Percichthyidae</term><term>acoustic telemetry</term><term>migration</term><term>site fidelity</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Abstract – Understanding movement patterns and habitat utilisation is critical for the management of diadromous fishes. An acoustic telemetry array was used to monitor 33 estuary perch, Macquaria colonorum and 39 Australian bass, Macquaria novemaculeata in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged M. novemaculeata were detected for a considerably shorter period than M. colonorum, and evidence suggested that fishing pressure may have impacted on their survival. Macquaria colonorum displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, M. colonorum individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, M. novemaculeata were distributed in shallow (<2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like M. colonorum, M. novemaculeata made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some M. novemaculeata individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Chris T. 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An acoustic telemetry array was used to monitor 33 estuary perch, Macquaria colonorum and 39 Australian bass, Macquaria novemaculeata in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged M. novemaculeata were detected for a considerably shorter period than M. colonorum, and evidence suggested that fishing pressure may have impacted on their survival. Macquaria colonorum displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, M. colonorum individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, M. novemaculeata were distributed in shallow (>2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like M. colonorum, M. novemaculeata made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some M. novemaculeata individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.</abstract><qualityIndicators><score>8</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595.276 x 782.362 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1861</abstractCharCount><pdfWordCount>7992</pdfWordCount><pdfCharCount>52114</pdfCharCount><pdfPageCount>15</pdfPageCount><abstractWordCount>254</abstractWordCount></qualityIndicators><title>Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian 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within a south‐eastern Australian river</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><availability><p>© 2011 State of NSW</p></availability><date>2012</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river</title><author xml:id="author-1"><persName><forename type="first">Chris T.</forename><surname>Walsh</surname></persName><affiliation>NSW Department of Primary Industries, Batemans Bay Fisheries Centre, Batemans Bay, NSW, Australia</affiliation><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation><affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</affiliation></author><author xml:id="author-2"><persName><forename type="first">Ivars V.</forename><surname>Reinfelds</surname></persName><affiliation>NSW Office of Water, Wollongong, NSW, Australia</affiliation></author><author xml:id="author-3"><persName><forename type="first">Charles A.</forename><surname>Gray</surname></persName><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation></author><author xml:id="author-4"><persName><forename type="first">Ron J.</forename><surname>West</surname></persName><affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</affiliation></author><author xml:id="author-5"><persName><forename type="first">Dylan E.</forename><surname>van der Meulen</surname></persName><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation></author><author xml:id="author-6"><persName><forename 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ident="en">en</language></langUsage><abstract><p>Abstract – Understanding movement patterns and habitat utilisation is critical for the management of diadromous fishes. An acoustic telemetry array was used to monitor 33 estuary perch, Macquaria colonorum and 39 Australian bass, Macquaria novemaculeata in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged M. novemaculeata were detected for a considerably shorter period than M. colonorum, and evidence suggested that fishing pressure may have impacted on their survival. Macquaria colonorum displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, M. colonorum individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, M. novemaculeata were distributed in shallow (<2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like M. colonorum, M. novemaculeata made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some M. novemaculeata individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>acoustic telemetry</term></item><item><term>migration</term></item><item><term>Macquaria colonorum</term></item><item><term>Macquaria novemaculeata</term></item><item><term>Percichthyidae</term></item><item><term>site fidelity</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-01">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6997A891B12BD5D1A0BD21DBB4F21D14CF59E440/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1600-0633</doi><issn type="print">0906-6691</issn><issn type="electronic">1600-0633</issn><idGroup><id type="product" value="EFF"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="ECOLOGY OF FRESHWATER FISH">Ecology of Freshwater Fish</title></titleGroup></publicationMeta><publicationMeta level="part" position="01101"><doi origin="wiley">10.1111/eff.2011.21.issue-1</doi><numberingGroup><numbering type="journalVolume" number="21">21</numbering><numbering type="journalIssue" number="1">1</numbering></numberingGroup><coverDate startDate="2012-01">January 2012</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="14" status="forIssue"><doi origin="wiley">10.1111/j.1600-0633.2011.00534.x</doi><idGroup><id type="unit" value="EFF534"></id></idGroup><countGroup><count type="pageTotal" number="15"></count></countGroup><titleGroup><title type="tocHeading1">Original articles</title></titleGroup><copyright>© 2011 State of NSW</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:3.0.1 mode:FullText" date="2011-12-01"></event><event type="publishedOnlineEarlyUnpaginated" date="2011-10-02"></event><event type="firstOnline" date="2011-10-02"></event><event type="publishedOnlineFinalForm" date="2011-12-01"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-24"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.3.4 mode:FullText" date="2015-02-25"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="145">145</numbering><numbering type="pageLast" number="159">159</numbering></numberingGroup><correspondenceTo>C. T. Walsh, NSW Department of Primary Industries, Batemans Bay Fisheries Centre, PO Box 17, Batemans Bay, NSW 2536, Australia. E‐mail: <email>chris.walsh@industry.nsw.gov.au</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:EFF.EFF534.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Accepted for publication September 8, 2011</unparsedEditorialHistory><countGroup><count type="figureTotal" number="8"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river</title><title type="shortAuthors"><b>Walsh et al.</b></title><title type="short"><b>Residency and movement of diadromous fishes</b></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1 #a2 #a3"><personName><givenNames>Chris T.</givenNames><familyName>Walsh</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a4"><personName><givenNames>Ivars V.</givenNames><familyName>Reinfelds</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>Charles A.</givenNames><familyName>Gray</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>Ron J.</givenNames><familyName>West</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a2"><personName><givenNames>Dylan E.</givenNames><familyName>van der Meulen</familyName></personName></creator><creator creatorRole="author" xml:id="cr6" affiliationRef="#a2"><personName><givenNames>James R.</givenNames><familyName>Craig</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="AU"><unparsedAffiliation>NSW Department of Primary Industries, Batemans Bay Fisheries Centre, Batemans Bay, NSW, Australia</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="AU"><unparsedAffiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="AU"><unparsedAffiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</unparsedAffiliation></affiliation><affiliation xml:id="a4" countryCode="AU"><unparsedAffiliation>NSW Office of Water, Wollongong, NSW, Australia</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">acoustic telemetry</keyword><keyword xml:id="k2">migration</keyword><keyword xml:id="k3"><i>Macquaria colonorum</i></keyword><keyword xml:id="k4"><i>Macquaria novemaculeata</i></keyword><keyword xml:id="k5">Percichthyidae</keyword><keyword xml:id="k6">site fidelity</keyword></keywordGroup><supportingInformation><p><b>Figure S1.</b> Mean (±SE) seasonal linear home‐range estimates for (a) <i>M. colonorum</i> and (b) <i>M. novemaculeata</i>; and (c) seasonal distance upstream of river mouth for both <i>M. colonorum</i> (cohort 1, closed circle; cohort 2, open circle) and <i>M. ovemaculeata</i> (cohort 1, closed triangle; cohort 2, open triangle) within the Shoalhaven River.</p><supportingInfoItem><mediaResource alt="supporting info item" href="urn-x:wiley:09066691:media:eff534:EFF_534_sm_FigS1"></mediaResource><caption>Supporting info item</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main" xml:lang="en"><p><b>Abstract – </b> Understanding movement patterns and habitat utilisation is critical for the management of diadromous fishes. An acoustic telemetry array was used to monitor 33 estuary perch, <i>Macquaria colonorum</i> and 39 Australian bass, <i>Macquaria novemaculeata</i> in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged <i>M. novemaculeata</i> were detected for a considerably shorter period than <i>M. colonorum</i>, and evidence suggested that fishing pressure may have impacted on their survival. <i>Macquaria colonorum</i> displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, <i>M. colonorum</i> individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, <i>M. novemaculeata</i> were distributed in shallow (<2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like <i>M. colonorum</i>, <i>M. novemaculeata</i> made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some <i>M. novemaculeata</i> individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Residency and movement of diadromous fishes</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Seasonal residency and movement patterns of two co‐occurring catadromous percichthyids within a south‐eastern Australian river</title></titleInfo><name type="personal"><namePart type="given">Chris T.</namePart><namePart type="family">Walsh</namePart><affiliation>NSW Department of Primary Industries, Batemans Bay Fisheries Centre, Batemans Bay, NSW, Australia</affiliation><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation><affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ivars V.</namePart><namePart type="family">Reinfelds</namePart><affiliation>NSW Office of Water, Wollongong, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Charles A.</namePart><namePart type="family">Gray</namePart><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ron J.</namePart><namePart type="family">West</namePart><affiliation>University of Wollongong, School of Biological Sciences, Wollongong, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Dylan E.</namePart><namePart type="family">van der Meulen</namePart><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">James R.</namePart><namePart type="family">Craig</namePart><affiliation>NSW Department of Primary Industries, Cronulla Fisheries Research Centre of Excellence, Cronulla, NSW, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2012-01</dateIssued><edition>Accepted for publication September 8, 2011</edition><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">8</extent><extent unit="tables">2</extent></physicalDescription><abstract>Abstract – Understanding movement patterns and habitat utilisation is critical for the management of diadromous fishes. An acoustic telemetry array was used to monitor 33 estuary perch, Macquaria colonorum and 39 Australian bass, Macquaria novemaculeata in the freshwater and estuarine reaches on the Shoalhaven River, south‐east Australia. On average, tagged M. novemaculeata were detected for a considerably shorter period than M. colonorum, and evidence suggested that fishing pressure may have impacted on their survival. Macquaria colonorum displayed significant shifts in seasonal and size‐related habitat use, with fish predominantly residing in deep (>5 m) areas within the middle (mesohaline) reaches of the estuary during the austral spring to autumn months. In winter, M. colonorum individuals made frequent downstream migrations, often to localised areas, within the lower estuary (LE). In contrast, M. novemaculeata were distributed in shallow (<2 m) habitats throughout the year, within the upper (oligohaline) estuarine reaches of the river, as well as in fresh water. Like M. colonorum, M. novemaculeata made extensive downstream and upstream movements, often coincident with reproductive behaviour, water temperature and increased freshwater inflows. It is postulated that the high site fidelity and repetitive homing displayed by both species is influenced by ontogenetic behaviour and prey availability. Furthermore, the extent of instream distribution by both species, and the lack of observed annual spawning migrations by some M. novemaculeata individuals, indicates the once considered ‘catadromous’ life cycle of these fishes may not be obligatory. A management approach is recommended to ensure that both these species are not over‐exploited within a portion of their instream range, thus maintaining their full reproductive potential.</abstract><subject lang="en"><genre>keywords</genre><topic>acoustic telemetry</topic><topic>migration</topic><topic>Macquaria colonorum</topic><topic>Macquaria novemaculeata</topic><topic>Percichthyidae</topic><topic>site fidelity</topic></subject><relatedItem type="host"><titleInfo><title>Ecology of Freshwater Fish</title></titleInfo><genre type="journal">journal</genre><note type="content"> Figure S1. Mean (±SE) seasonal linear home‐range estimates for (a) M. colonorum and (b) M. novemaculeata; and (c) seasonal distance upstream of river mouth for both M. colonorum (cohort 1, closed circle; cohort 2, open circle) and M. ovemaculeata (cohort 1, closed triangle; cohort 2, open triangle) within the Shoalhaven River.Supporting Info Item: Supporting info item - </note><identifier type="ISSN">0906-6691</identifier><identifier type="eISSN">1600-0633</identifier><identifier type="DOI">10.1111/(ISSN)1600-0633</identifier><identifier type="PublisherID">EFF</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>21</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>145</start><end>159</end><total>15</total></extent></part></relatedItem><identifier type="istex">6997A891B12BD5D1A0BD21DBB4F21D14CF59E440</identifier><identifier type="DOI">10.1111/j.1600-0633.2011.00534.x</identifier><identifier type="ArticleID">EFF534</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 State of NSW</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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