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Spatial and seasonal variation in growth rate and secondary production of Yoldia notabilis in Otsuchi Bay, Japan, with reference to the influence of food supply from the water column Nakaoka, M. (1992). Spatial and seasonal variation in growth rate and secondary production of Yoldia notabilis in Otsuchi Bay, Japan, with reference to the influence of food supply from the water column. Mar. Ecol. Prog. Ser. 88(2-3): 215-223. https://dx.doi.org/10.3354/meps088215 In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer

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Beschikbaar in	Auteur
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Trefwoorden

Analysis > Mathematical analysis > Statistical analysis > Correlation analysis Availability > Food availability Biological production > Primary production Biological production > Secondary production Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine molluscs Organic matter Population functions > Growth Spatial variations Temporal variations > Periodic variations > Seasonal variations Yoldia notabilis Yokoyama, 1922 [WoRMS] Marien/Kust

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Auteur		Top
Nakaoka, M.

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Abstract

A 1 yr field study of a long-lived protobranch bivalve, Yoldia notabilis, in Otsuchi Bay, northeastern Japan, revealed that there was a large seasonal and spatial variation in growth rate and secondary production, and that primary production in the water column and following organic supply to the bottom were responsible for the variation. Both shell and soft tissue growth of each of 9 year-classes were rapid in spring, and slow or even negative in other seasons. The rapid growth coincided well with the occurrence of spring phytoplankton bloom in the water column and the peak of organic flux to the bottom. Mean shell length and mean soft tissue weight of each year-class were larger, and the growth rates of shell and soft tissue as well as the secondary production were higher at the shallower station (10 m deep) than at the deeper station (14 m). The differences in size, growth rate and production between the 2 stations were consistent with the local differences in food supply from the water column to the bottom, but not related to other environmental factors such as temperature, salinity, organic content in the sediment and density of Y. notabilis.

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