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Daily activity pattern of the sand goby, Pomatoschistus minutus (Pisces), at low light intensity.
Stockholm University, Faculty of Science, Department of Systems Ecology.
Stockholm University, Faculty of Science, Department of Systems Ecology.
2008 (English)In: HYDROBIOLOGIA, ISSN 0018-8158, Vol. 603, 129-137 p.Article in journal (Refereed) Published
Abstract [en]

In autumn and winter, the sand goby (Pomatoschistus minutus) in the Baltic Sea is to a large extent found on soft bottoms deeper than the summer thermocline. Although P. minutus are numerous during a large part of the year in these areas, most studies on this species have been performed on very shallow bottoms. Here we study the activity of P. minutus in autumn using video recordings in the laboratory, under light (1.5-2 lux) and temperature conditions prevailing at ca. 30 m depth. We propose that the results can be used to evaluate in situ abundance censuses. P. minutus had the same nocturnal activity pattern in low light intensity as described for light intensities found in shallow water. The fish swim significantly more in darkness than in light, and bury in the sediment mainly at day. These behaviours, recorded in the absence of predators, are suggested to be adaptations to avoid predators.

Place, publisher, year, edition, pages
2008. Vol. 603, 129-137 p.
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URN: urn:nbn:se:su:diva-15623DOI: doi:10.1007/s10750-007-9253-4ISI: 000254088900009OAI: diva2:182143
Available from: 2008-12-07 Created: 2008-12-07 Last updated: 2011-01-10Bibliographically approved

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Ejdung, Gunilla
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