Ecological significances of ontogenetic shifts in the stream‐dwelling catfish, Hatcheria macraei (Siluriformes, Trichomycteridae), in a Patagonian river
Identifieur interne : 000C82 ( Istex/Corpus ); précédent : 000C81; suivant : 000C83Ecological significances of ontogenetic shifts in the stream‐dwelling catfish, Hatcheria macraei (Siluriformes, Trichomycteridae), in a Patagonian river
Auteurs : J. P. Barriga ; M. A. BattiniSource :
- Ecology of Freshwater Fish [ 0906-6691 ] ; 2009-09.
English descriptors
Abstract
Abstract – The relationship between ontogenetic changes and both feeding and habitat preferences was studied in a stream catfish population of Argentine Patagonia. Fish capture, as well as habitat data recording, was performed during a 1‐year long period. Larvae–juvenile transition was determined between 22.4 and 29.4 mm standard length (SL), on the basis of the relative growth changes and morphogenesis, and juvenile–adult shift was established between 61 and 65 mm SL using a macroscopic criterion of gonadal development and gonadosomatic index. Spawning period was estimated to be in the summer season, from December to February. Larvae preferred shallow marginal pools and fed mainly on small Chironomidae larvae, while juveniles and adults inhabited riffles and preyed on Ephemeroptera nymphs and Chironomid larvae. Morphological constraints during the larval period were related to habitat and feeding preferences. A complete development of fins allowed juveniles to colonise faster water habitats while a bigger mouth gape permitted them to prey on new items and on a larger size prey range.
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DOI: 10.1111/j.1600-0633.2009.00356.x
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P. Barriga, Quintral 1250, (8400) San Carlos de Bariloche, Río Negro, Argentina; e‐mail: <email>barriga@crub.uncoma.edu.ar</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:EFF.EFF356.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Accepted for publication February 7, 2009</unparsedEditorialHistory><countGroup><count type="figureTotal" number="6"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main">Ecological significances of ontogenetic shifts in the stream‐dwelling catfish, <i>Hatcheria macraei</i> (Siluriformes, Trichomycteridae), in a Patagonian river</title><title type="shortAuthors"><b>Barriga & Battini</b></title><title type="short"><b>Ecological significances of ontogenetic shifts in <i>Hatcheria macraei</i></b></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#aff-1-1"><personName><givenNames>J. P.</givenNames><familyName>Barriga</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#aff-1-1"><personName><givenNames>M. A.</givenNames><familyName>Battini</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="aff-1-1"><unparsedAffiliation>Instituto de Investigaciones en Biodiversidad y Medioambiente (CONICET – Universidad Nacional del Comahue)</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">allometric changes</keyword><keyword xml:id="k2">habitat use</keyword><keyword xml:id="k3">diet shift</keyword><keyword xml:id="k4">morphological constraints</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><!-- Barriga JP, Battini MA. Ecological significances of ontogenetic shifts in the stream-dwelling catfish, Hatcheria macraei (Siluriformes, Trichomycteridae), in a Patagonian river.
Ecology of Freshwater Fish 2009: 18: 395–405. © 2009 John Wiley & Sons A/S --><p><b>Abstract – </b> The relationship between ontogenetic changes and both feeding and habitat preferences was studied in a stream catfish population of Argentine Patagonia. Fish capture, as well as habitat data recording, was performed during a 1‐year long period. Larvae–juvenile transition was determined between 22.4 and 29.4 mm standard length (SL), on the basis of the relative growth changes and morphogenesis, and juvenile–adult shift was established between 61 and 65 mm SL using a macroscopic criterion of gonadal development and gonadosomatic index. Spawning period was estimated to be in the summer season, from December to February. Larvae preferred shallow marginal pools and fed mainly on small Chironomidae larvae, while juveniles and adults inhabited riffles and preyed on Ephemeroptera nymphs and Chironomid larvae. Morphological constraints during the larval period were related to habitat and feeding preferences. A complete development of fins allowed juveniles to colonise faster water habitats while a bigger mouth gape permitted them to prey on new items and on a larger size prey range.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Ecological significances of ontogenetic shifts in the stream‐dwelling catfish, Hatcheria macraei (Siluriformes, Trichomycteridae), in a Patagonian river</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Ecological significances of ontogenetic shifts in Hatcheria macraei</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Ecological significances of ontogenetic shifts in the stream‐dwelling catfish, Hatcheria macraei (Siluriformes, Trichomycteridae), in a Patagonian river</title></titleInfo><name type="personal"><namePart type="given">J. P.</namePart><namePart type="family">Barriga</namePart><affiliation>Instituto de Investigaciones en Biodiversidad y Medioambiente (CONICET – Universidad Nacional del Comahue)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M. A.</namePart><namePart type="family">Battini</namePart><affiliation>Instituto de Investigaciones en Biodiversidad y Medioambiente (CONICET – Universidad Nacional del Comahue)</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">2009-09</dateIssued><edition>Accepted for publication February 7, 2009</edition><copyrightDate encoding="w3cdtf">2009</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">6</extent><extent unit="tables">3</extent></physicalDescription><abstract>Abstract – The relationship between ontogenetic changes and both feeding and habitat preferences was studied in a stream catfish population of Argentine Patagonia. Fish capture, as well as habitat data recording, was performed during a 1‐year long period. Larvae–juvenile transition was determined between 22.4 and 29.4 mm standard length (SL), on the basis of the relative growth changes and morphogenesis, and juvenile–adult shift was established between 61 and 65 mm SL using a macroscopic criterion of gonadal development and gonadosomatic index. Spawning period was estimated to be in the summer season, from December to February. Larvae preferred shallow marginal pools and fed mainly on small Chironomidae larvae, while juveniles and adults inhabited riffles and preyed on Ephemeroptera nymphs and Chironomid larvae. Morphological constraints during the larval period were related to habitat and feeding preferences. A complete development of fins allowed juveniles to colonise faster water habitats while a bigger mouth gape permitted them to prey on new items and on a larger size prey range.</abstract><subject lang="en"><genre>keywords</genre><topic>allometric changes</topic><topic>habitat use</topic><topic>diet shift</topic><topic>morphological constraints</topic></subject><relatedItem type="host"><titleInfo><title>Ecology of Freshwater Fish</title></titleInfo><genre type="journal">journal</genre><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>2009</date><detail type="volume"><caption>vol.</caption><number>18</number></detail><detail type="issue"><caption>no.</caption><number>3</number></detail><extent unit="pages"><start>395</start><end>405</end><total>11</total></extent></part></relatedItem><identifier type="istex">B5D3C6AA0E3F7B01329038DF73BABF38362DA772</identifier><identifier type="DOI">10.1111/j.1600-0633.2009.00356.x</identifier><identifier type="ArticleID">EFF356</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2009 John Wiley & Sons A/S</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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