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Publication
Estimation of the life history parameters of Mytilus galloprovincialis (Lamarck) larvae in a coastal lagoon (Ria Formosa south Portugal)
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Advisor(s)
Abstract(s)
The life history parameters of early stages of marine invertebrates, particularly field estimations,have received relatively little attention. The aim of this research was to estimate in situ abundance and growth of Mytilus galloprovincialis planktonic larvae. Plankton samples were filtered through
gauze of 63 mm mesh and identified, counted and measured using an inverted microscope.
Short-term fluctuations in Mytilus galloprovincialis larvae abundance and environmental parameters (water temperature, salinity, wind velocity direction, tidal amplitude and chlorophyll a) were
monitored (two to three times a week). Larval cohorts were identified using size–frequency distributions and age estimates compared with larval shell growth lines. Data were fitted to the linear, exponential, von Bertalanffy and Laird–Gompertz growth models. Larval growth adjusted 21 2 better to the Laird–Gompertz model (0.52560.073 mm d ; r 50.768; P,0.05). Reduction of shell growth after 1 to 1.5 months in the plankton suggests the occurrence, in this period, of a
‘delay of metamorphosis’ phase. The results of our study indicate that advection and availability of settlement substratum may be the key factors for the life history parameters of this species in a coastal system such as the Ria Formosa.
Description
Keywords
Bivalve larvae Growth Mussel Mytilus galloprovincialis Marine benthic invertebrates Edulis-L
Citation
Chicharo, L. M. Z.; Chicharo, M. A. Estimation of the life history parameters of Mytilus galloprovincialis (Lamarck) larvae in a coastal lagoon (Ria Formosa south Portugal), Journal of Experimental Marine Biology and Ecology, 243, 1, 81-94, 2000.
Publisher
Elsevier