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Floating behaviour in the tellinid bivalve Macoma balthica (L.) (1988)

Sörlin, Tommy

Springer

Oecologia 77 (1988), S. 273-277

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ISSN: 1432-1939

Keywords: Secondary distribution ; Floating behaviour Tellinid bivalve ; Juveniles ; Adults

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary The tellinid bivalve Macoma balthica from the Dutch Wadden Sea mudflats achieved secondary distribution by a floating behaviour after stimulation by low ambient temperature in slow-moving sea water (salinity 25‰). Floating behaviour among responding mussels began with burrowing displacements as their foot was directed towards the sediment surface. After extreme protrusion of the foot they became buoyant and were able to float. Floating behaviour was observed to last for periods of 1.5 h. During this active sequence frequent stops (range 2–6) were followed by resting periods on the sediment. In stagnant water at a constant temperature, mussels displayed burrowing displacement in a rhythmic manner with one peak of activity during the dark period of the day. Mussels previously acclimatized at high temperatue showed significantly stronger responses to current and temperature stimuli. Adult mussels as well as juveniles performed the floating behaviour. The paper discusses the ecological significane of secondary distribution.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00379198

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Production ecology in the Northern Baltic (1981)

Sandström, Olof ; Sörlin, Tommy

Springer

Hydrobiologia 76 (1981), S. 87-96

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ISSN: 1573-5117

Keywords: Ecology ; production ; Gulf of Bothnia ; pelagial ; benthos

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Production biology in the Bothnian Bay is discussed and compared to that of the southern parts of the Baltic. Severe ice-conditions, low water temperatures in spring and early summer and a pronounced water-colouring cause a delay of the spring development of phytoplankton and a low annual production in the Bothnian Bay. This delay makes possible a higher efficiency of the pelagic system as the zooplankton fauna can develop in harmony with the food resources. The downward transport of energy and matter to the bottom communities from an efficient pelagial should be small and temporally unpredictable, which is thought to be an adequate explanation of the observed very low benthic fauna biomasses in the Bothnian Bay.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00014038

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