Cristin-resultat-ID: 344596
Sist endret: 19. februar 2010, 18:24
NVI-rapporteringsår: 2009
Resultat
Vitenskapelig artikkel
2009

What can size distributions within cohorts tell us about ecological processes in fish larvae?

Bidragsytere:
  • Arild Folkvord
  • Øyvind Fiksen
  • Hans Høie
  • Arne Johannessen
  • Erling Otterlei og
  • Knut Wiik Vollset

Tidsskrift

Scientia Marina
ISSN 0214-8358
e-ISSN 1886-8134
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2009
Volum: 73
Sider: 119 - 130
Open Access

Importkilder

Scopus-ID: 2-s2.0-70350710584
Isi-ID: 000271157200011
Isi-ID: 2,71157E+11

Klassifisering

Vitenskapsdisipliner

Marinbiologi • Ressursbiologi

Beskrivelse Beskrivelse

Tittel

What can size distributions within cohorts tell us about ecological processes in fish larvae?

Sammendrag

Marine fish larvae are subject to variable environments, which is probably reflected in their growth and survival rates. Mortality rates are generally high and size-dependent. At the species level, these mortality rates are usually accompanied by correspondingly high growth rates. Here we provide examples from experimental studies with Atlantic cod (Gadus morhua) and Atlantic herring (Clupea harengus) larvae, in which multiple cohorts were followed over time. Body size, prey concentrations, and temperature are shown to influence growth rates. We present a method based on cumulative size distributions (CSD s) for visualizing variability of sizes within cohorts over time. Analysis of CSD s revealed size-selective mortality and variations among populations in size- and temperature-dependent growth throughout ontogeny. We found that cod larvae consistently exhibit higher growth rates than herring larvae. While cod larvae may have an advantage over herring larvae when food availability is high, herring were more able to survive at low food concentrations than cod. Cod and herring seem to represent two growth strategies: cod larvae are relatively small at hatching and a high growth rate appears to be a prerequisite for success, whereas herring larvae are initially large, but grow more slowly.

Bidragsytere

Arild Folkvord

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap (BIO) ved Universitetet i Bergen
Aktiv cristin-person

Øyvind Fiksen

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap (BIO) ved Universitetet i Bergen

Hans Høie

Bidragsyterens navn vises på dette resultatet som Hans Høie
  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap (BIO) ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Havforskningsinstituttet

Arne Johannessen

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap (BIO) ved Universitetet i Bergen

Erling Otterlei

  • Tilknyttet:
    Forfatter
    ved Sagafjord Sea Farm AS
  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap (BIO) ved Universitetet i Bergen
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