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Distribution, biomass, recruitment and productivity of Anadara senilis (L.) (Mollusca: Bivalvia) on the Banc d'Arguin Mauritania
Wolff, W. J., Gueye, A., Meijboom, A., Piersma, T. & Alassane Sall, M.
Da: ConchBooks, Harxheim, GermaniaConchBooks
Contatta il venditoreVenditore con 4 stelleCondizione: Usato
EUR 5,75
EUR 24,00 spedizioneSpedito da Germania a U.S.A.Quantità: 1 disponibili
Aggiungi al carrelloData on distribution, ecology, biomass, recruitment, growth, mortality and productivity of the West African bloody cockle Anadara senilis were collected at the Banc d'Aguuin, Mauritania, in early 1985 and 1986. Ash-free dry weight appeared to be correlated best with shell height. A. senilis was abundant on the tidal flats of lan…dlocked coastal bays, but nearly absent on the tidal flats bordering the open sea. The average biomass for the entire area of tidal flats was estimated at 5.5 g m?2 ash-free dry weight. The A. senilis population appeared to consist mainly of 10 to 20-year-old individuals, showing a very slow growth and a production: biomass ratio of about 0.02 y?1. Recruitment appeared negligible and mortality was estimated to be about 10% per year. Oystercatchers (Haematopus ostralegus), the gastropod Cymbium cymbium and unknown fish species were responsible for a large share of this. The distinction of annual growth marks permitted the assessment of year-class strength, which appeared to be correlated with the average discharge of the river Senegal. This may be explained by assuming that year-class strength and river discharge both are correlated with rainfall at the Banc d'Arguin. 11 pp., 11 figs, gr. 8.
