Aquat. Living Resour.
Volume 31, 2018
|Number of page(s)||6|
|Published online||04 October 2018|
Trophic cues as possible triggers of mussel larval settlement in southeastern Brazil
Institut des sciences de la mer, Université du Québec à Rimouski,
310 allée des Ursulines,
G5L 3A1, Canada
2 Universidade de São Paulo, Centro de Biologia Marinha (CEBIMar/USP), Rod. Manoel Hipólito do Rego, km 131.5 11600-000, São Sebastião, São Paulo, Brazil
* Corresponding author: email@example.com
Handling Editor: Simon Morley
Accepted: 11 July 2018
Oligotrophic conditions may impose a nutritional challenge for the larval and early post-larval development of bivalves during the search for a suitable benthic habitat. Here we investigated what settlement cues might be important for mytilid populations in southeastern Brazil. Our results point to a trophic trigger mediating larval settlement that may include an effect of saturated fatty acids, probably linked to organic detritus and bacterial production deriving from terrestrial inputs. The prevalence of drifting in this population suggests it may be a strategy for individuals to delay final settlement until encountering favorable trophic environmental conditions.
Key words: Brachidontes solisianus / Shell morphometry / Prodissoconch II / Dissoconch / Juvenile drifting
© EDP Sciences 2018
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