The influence of light on the diel vertical migration of young‐of‐the‐year burbot Lota lota in Lake Constance
Identifieur interne : 000543 ( Main/Exploration ); précédent : 000542; suivant : 000544The influence of light on the diel vertical migration of young‐of‐the‐year burbot Lota lota in Lake Constance
Auteurs : W. N. Probst [Allemagne] ; Reiner Eckmann [Allemagne]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 2009-01.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Eau.
- effets des radiations : Larve.
- physiologie : Gadiformes, Larve.
- Acoustique, Allemagne, Analyse de régression, Animaux, Eau douce, Lumière, Modèles statistiques, Photopériode, Saisons.
- Wicri :
- geographic : Allemagne.
English descriptors
- KwdEn :
- Acoustics (MeSH), Animals (MeSH), Fresh Water (MeSH), Gadiformes (physiology), Germany (MeSH), Larva (physiology), Larva (radiation effects), Light (MeSH), Models, Statistical (MeSH), Photoperiod (MeSH), Regression Analysis (MeSH), Seasons (MeSH), Water (analysis), gadoid, hydroacoustics, larvae, ontogeny, pelagic, predator evasion.
- MESH :
- chemical , analysis : Water.
- geographic : Germany.
- physiology : Gadiformes, Larva.
- radiation effects : Larva.
- Acoustics, Animals, Fresh Water, Light, Models, Statistical, Photoperiod, Regression Analysis, Seasons.
Abstract
The diel vertical distribution of young‐of‐the‐year (YOY) burbot Lota lota in the pelagic zone of Lake Constance was compared to light intensity at the surface and to the light intensity at their mean depth. Lota lota larvae inhabited the pelagic zone of Lake Constance from the beginning of May until the end of August. From early June, after the stratification of the water column, fish performed diel vertical migrations (DVM) between the hypolimnion and epilimnion. The amplitude of DVM increased constantly during the summer and reached 70 m by the end of August. Lota lota started their ascent to the surface after sunset and descended into the hypolimnion after sunrise. As the YOY fish grew from May to August, they experienced decreasing diel maximum light intensities: in May and early June L. lota spent the day at light intensities >40 W m−2, but they never experienced light intensities >0·1 W m−2 after the end of June. From this time, L. lota experienced the brightest light intensities during dusk and dawn, suggesting feeding opportunities at crepuscular hours. The present study implies, that YOY L. lota in the pelagic zone of Lake Constance increased their DVM amplitude during the summer to counteract a perceived predation risk related to body size and pigmentation.
Url:
DOI: 10.1111/j.1095-8649.2008.02120.x
Affiliations:
- Allemagne
- Bade-Wurtemberg, District de Fribourg-en-Brisgau
- Constance (Allemagne)
- Université de Constance
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Le document en format XML
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Lota lota larvae inhabited the pelagic zone of Lake Constance from the beginning of May until the end of August. From early June, after the stratification of the water column, fish performed diel vertical migrations (DVM) between the hypolimnion and epilimnion. The amplitude of DVM increased constantly during the summer and reached 70 m by the end of August. Lota lota started their ascent to the surface after sunset and descended into the hypolimnion after sunrise. As the YOY fish grew from May to August, they experienced decreasing diel maximum light intensities: in May and early June L. lota spent the day at light intensities >40 W m−2, but they never experienced light intensities >0·1 W m−2 after the end of June. From this time, L. lota experienced the brightest light intensities during dusk and dawn, suggesting feeding opportunities at crepuscular hours. The present study implies, that YOY L. lota in the pelagic zone of Lake Constance increased their DVM amplitude during the summer to counteract a perceived predation risk related to body size and pigmentation.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>Bade-Wurtemberg</li><li>District de Fribourg-en-Brisgau</li></region><settlement><li>Constance (Allemagne)</li></settlement><orgName><li>Université de Constance</li></orgName></list><tree><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Probst, W N" sort="Probst, W N" uniqKey="Probst W" first="W. N." last="Probst">W. N. Probst</name></region><name sortKey="Eckmann, R" sort="Eckmann, R" uniqKey="Eckmann R" first="R." last="Eckmann">Reiner Eckmann</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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