The critical period of high mortality of larvae fish —A discussion based on current research
Identifieur interne : 001E93 ( Main/Exploration ); précédent : 001E92; suivant : 001E94The critical period of high mortality of larvae fish —A discussion based on current research
Auteurs : Li Sifa [République populaire de Chine] ; J. A. Mathias [Canada]Source :
- Chinese Journal of Oceanology and Limnology [ 0254-4059 ] ; 1987-03-01.
Abstract
Abstract: Most fishes suffer high mortality during early development stages. The existence of a “critical period” was hypothesized by Hjort (1914). However, several decades of research have resulted in considerable controversy over the hypothesis. This paper attempts to clarify the critical period concept, demonstrate its usefulness, and resolve some of the controversy surrounding it. Based on our own studies and the literature, we find that within the “aquaculture school” (those concerned with culturing fishes, particulary larval stages), there is a great deal of evidence for the critical period concept. But we redefine the concept of “critical period” of mortality of fish larvae in this way. The deepest, sharpest, and fastest physiological and ecological changes during the development of the larvae are produced with the shift from endogenous nutrition to exogenous. At this stage, the old functions are quickly being replaced by new functions inside the body. Because of this shifting of function and imperfection of organs, the larvae are most sensitive at this time to environmental factors, particularly food supply. A higher specific mortality rate often occurs immediately folowing the period of strictly endogenous yolk feeding, and during the period of first exogenous feeding. Then it may be followed by a lower specific mortality rate. The significance of a “critical period” for fish populations is discussed. A good understanding of the “critical period” would provide a means for predicting the strength of year classes in natural fish populations, and also suggests approaches for increasing survival in aquaculture systems.
Url:
DOI: 10.1007/BF02848526
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001262
- to stream Istex, to step Curation: 001260
- to stream Istex, to step Checkpoint: 001316
- to stream Main, to step Merge: 002060
- to stream Main, to step Curation: 001E93
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">The critical period of high mortality of larvae fish —A discussion based on current research</title><author><name sortKey="Sifa, Li" sort="Sifa, Li" uniqKey="Sifa L" first="Li" last="Sifa">Li Sifa</name></author><author><name sortKey="Mathias, J A" sort="Mathias, J A" uniqKey="Mathias J" first="J. A." last="Mathias">J. A. Mathias</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:A4B1D5D13BD82899BD8E5FCB29D9CC3EE6BF374A</idno><date when="1987" year="1987">1987</date><idno type="doi">10.1007/BF02848526</idno><idno type="url">https://api.istex.fr/document/A4B1D5D13BD82899BD8E5FCB29D9CC3EE6BF374A/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001262</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001262</idno><idno type="wicri:Area/Istex/Curation">001260</idno><idno type="wicri:Area/Istex/Checkpoint">001316</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001316</idno><idno type="wicri:doubleKey">0254-4059:1987:Sifa L:the:critical:period</idno><idno type="wicri:Area/Main/Merge">002060</idno><idno type="wicri:Area/Main/Curation">001E93</idno><idno type="wicri:Area/Main/Exploration">001E93</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">The critical period of high mortality of larvae fish —A discussion based on current research</title><author><name sortKey="Sifa, Li" sort="Sifa, Li" uniqKey="Sifa L" first="Li" last="Sifa">Li Sifa</name><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Shanghai Fisheries University, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Mathias, J A" sort="Mathias, J A" uniqKey="Mathias J" first="J. A." last="Mathias">J. A. Mathias</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Fisheries and Oceans, Freshwater Institute</wicri:regionArea><wicri:noRegion>Freshwater Institute</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Chinese Journal of Oceanology and Limnology</title><title level="j" type="abbrev">Chin. J. Ocean. Limnol.</title><idno type="ISSN">0254-4059</idno><idno type="eISSN">1993-5005</idno><imprint><publisher>Science Press</publisher><pubPlace>Beijing</pubPlace><date type="published" when="1987-03-01">1987-03-01</date><biblScope unit="volume">5</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="80">80</biblScope><biblScope unit="page" to="96">96</biblScope></imprint><idno type="ISSN">0254-4059</idno></series><idno type="istex">A4B1D5D13BD82899BD8E5FCB29D9CC3EE6BF374A</idno><idno type="DOI">10.1007/BF02848526</idno><idno type="ArticleID">BF02848526</idno><idno type="ArticleID">Art10</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0254-4059</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Most fishes suffer high mortality during early development stages. The existence of a “critical period” was hypothesized by Hjort (1914). However, several decades of research have resulted in considerable controversy over the hypothesis. This paper attempts to clarify the critical period concept, demonstrate its usefulness, and resolve some of the controversy surrounding it. Based on our own studies and the literature, we find that within the “aquaculture school” (those concerned with culturing fishes, particulary larval stages), there is a great deal of evidence for the critical period concept. But we redefine the concept of “critical period” of mortality of fish larvae in this way. The deepest, sharpest, and fastest physiological and ecological changes during the development of the larvae are produced with the shift from endogenous nutrition to exogenous. At this stage, the old functions are quickly being replaced by new functions inside the body. Because of this shifting of function and imperfection of organs, the larvae are most sensitive at this time to environmental factors, particularly food supply. A higher specific mortality rate often occurs immediately folowing the period of strictly endogenous yolk feeding, and during the period of first exogenous feeding. Then it may be followed by a lower specific mortality rate. The significance of a “critical period” for fish populations is discussed. A good understanding of the “critical period” would provide a means for predicting the strength of year classes in natural fish populations, and also suggests approaches for increasing survival in aquaculture systems.</div></front></TEI><affiliations><list><country><li>Canada</li><li>République populaire de Chine</li></country></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Sifa, Li" sort="Sifa, Li" uniqKey="Sifa L" first="Li" last="Sifa">Li Sifa</name></noRegion></country><country name="Canada"><noRegion><name sortKey="Mathias, J A" sort="Mathias, J A" uniqKey="Mathias J" first="J. A." last="Mathias">J. A. Mathias</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/EsturgeonV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001E93 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001E93 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Eau
|area= EsturgeonV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:A4B1D5D13BD82899BD8E5FCB29D9CC3EE6BF374A
|texte= The critical period of high mortality of larvae fish —A discussion based on current research
}}
| This area was generated with Dilib version V0.6.27. |  |