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An acoustic telemetry study of seabream (Sparus aurata L.): first results on activity rhythm, effects of environmental variables and space utilization Bégout, M.L.; Lagardère, J.-P. (1995). An acoustic telemetry study of seabream (Sparus aurata L.): first results on activity rhythm, effects of environmental variables and space utilization. Hydrobiologia 300-301: 417-423. https://dx.doi.org/10.1007/BF00024483 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 214393 [ aanvragen ]

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Trefwoorden

Activity patterns Aquaculture Behaviour > Feeding behaviour Behaviour > Social behaviour > Schooling behaviour Equipment > Detectors > Acoustic tracking systems Sparus aurata Linnaeus, 1758 [WoRMS] Marien/Kust

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Auteurs		Top
Bégout, M.L. Lagardère, J.-P.

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Abstract

The movements of seabream (Sparus aurata L) were recorded in two earthen ponds (250 m2 and 400 m2) by tracking fish tagged with miniature acoustic transmitters. Five seabreams, 500 g in weight, were tracked for periods of four or five days. Fish positions were recorded continuously using an acoustic telemetry system. Each of the five tagged seabreams were tracked individually. Two fishes were released schooled with numerous other individuals, two others were released in isolation and one was grouped with three other individuals. The schooled seabreams were more active in general and, in the large school they were diurnal; isolated fishes however, were more active at night. Temperature influences significantly and progressively the fish activity. Activity decreases at night and increases during daylight. Oxygen saturation also influences swimming activity with a general positive relationship. The horizontal distribution of this species was not uniform. Its resting area was generally located around some particular landmarks such as inlet or outlet pipes in the ponds. No feverish feeding competition was observed between individuals of the same school. The feeding area was cleaned rapidly, in less than 10 minutes, without subsequent returns from the resting area to the feeding area.

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