Ontogenetic changes in habitat use by whitefish, Coregonus lavaretus
Identifieur interne : 001558 ( Main/Exploration ); précédent : 001557; suivant : 001559Ontogenetic changes in habitat use by whitefish, Coregonus lavaretus
Auteurs : Terj Sandlund [Norvège] ; Fredri N Sje [Norvège] ; Bror Jonsson [Norvège]Source :
- Environmental Biology of Fishes [ 0378-1909 ] ; 1992-04-01.
English descriptors
- KwdEn :
Abstract
Synopsis: The whitefish, Coregonus lavaretus, in the lake Mjøsa exhibited two niche changes during their life cycle. Juveniles (< 25 cm body length) were confined to the shallow (0–30 m) epibenthic zone. Medium sized whitefish (25–35 cm body length) expanded their habitat use to include the deep (30–90 m) epibenthic zone as well as the pelagic zone. From a body length of 35 cm, habitat use was restricted to the deep epibenthic zone. Small fish in the shallow epibenthic zone ate small and medium-sized prey (zooplankton, insect larvae and surface insects). Medium-sized fish in this zone were in addition feeding on the larger amphipod, Pallasea quadrispinosa. In the pelagic zone, the diet of medium-sized whitefish was dominated by zooplankton, although some larger prey like surface insects and age-0 smelt, Osmerus eperlanus, were also eaten. In the deep epibenthic zone, the diet of both medium-sized and large (< 35 cm) whitefish consisted mainly of the large prey P. quadrispinosa.
Url:
DOI: 10.1007/BF00010945
Affiliations:
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Juveniles (< 25 cm body length) were confined to the shallow (0–30 m) epibenthic zone. Medium sized whitefish (25–35 cm body length) expanded their habitat use to include the deep (30–90 m) epibenthic zone as well as the pelagic zone. From a body length of 35 cm, habitat use was restricted to the deep epibenthic zone. Small fish in the shallow epibenthic zone ate small and medium-sized prey (zooplankton, insect larvae and surface insects). Medium-sized fish in this zone were in addition feeding on the larger amphipod, Pallasea quadrispinosa. In the pelagic zone, the diet of medium-sized whitefish was dominated by zooplankton, although some larger prey like surface insects and age-0 smelt, Osmerus eperlanus, were also eaten. In the deep epibenthic zone, the diet of both medium-sized and large (< 35 cm) whitefish consisted mainly of the large prey P. quadrispinosa.</div></front></TEI><affiliations><list><country><li>Norvège</li></country><region><li>Trøndelag</li></region><settlement><li>Trondheim</li></settlement></list><tree><country name="Norvège"><region name="Trøndelag"><name sortKey="Sandlund, Terj" sort="Sandlund, Terj" uniqKey="Sandlund T" first="Terj" last="Sandlund">Terj Sandlund</name></region><name sortKey="Jonsson, Bror" sort="Jonsson, Bror" uniqKey="Jonsson B" first="Bror" last="Jonsson">Bror Jonsson</name><name sortKey="N Sje, Fredri" sort="N Sje, Fredri" uniqKey="N Sje F" first="Fredri" last="N Sje">Fredri N Sje</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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