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Göteborgs universitets publikationer

Barnacle larvae actively select flow environments supporting post-settlement growth and survival

Författare och institution:
Ann I. Larsson (Institutionen för marin ekologi & Institutionen för marin ekologi, Tjärnö marinbiologiska laboratorium); Per R. Jonsson (Institutionen för marin ekologi & Institutionen för marin ekologi, Tjärnö marinbiologiska laboratorium)
Publicerad i:
Ecology, 87 ( 8 ) s. 1960-1966
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Many marine dispersive propagules select specific settlement sites based on a range of environmental cues. However, the link between larval choice and post-settlement growth and survival is still poorly understood. Here we show that cypris larvae of the barnacle Balanus improvisus actively reject surfaces exposed to local flow speeds exceeding 5-10 cm/s. Field experiments show that post-settlement growth and survival decline in free-stream flows above 15 cm/s. Moreover, studies in flume flow at local speeds exceeding 10 cm/s reveal that early juveniles show reduced feeding rates caused by deformation of the cirral fan, reduced retention efficiency, and a decrease in time spent feeding. We conclude that cypris larvae actively reject flow environments that will be suboptimal for suspension feeding in the early post-settlement phase. Our study suggests that larval choice can be adaptively connected to a specific part of the life cycle, in this case the very sensitive time after metamorphosis.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper ->
Balanus improvisus, barnacle, feeding, flow, growth, larval behavior, spatial distribution, survival, HABITAT SELECTION, SETTLEMENT-PATTERNS, RECRUITMENT, EXPLORATION, SUBSTRATA, SURFACE, INVERTEBRATES, ATTACHMENT, DEPENDENCE, RETENTION
Postens nummer:
Posten skapad:
2007-10-30 11:46
Posten ändrad:
2010-02-18 11:22

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