Effects of Arenicola marina and Cerastoderma edule on distribution, abundance and population structure of Corophium volutator in Gullmarsfjorden Western Sweden

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The amphipod Corophium volutator has a patchy distribution which has been related to different factors (both physical and biological) at different sites. Experiments in the Wadden Sea, involving manipulation of the densities of the lugworm Arenicola marina and the bivalve Cerastoderma edule showed strong negative effects of these two species on the abundance of C. valutator. This result could explain the distribution pattern of C. valutator found in the Wadden Sea. The question was if this would also be the case in other geographical regions. Therefore, these experiments were repeated under different physical conditions in two shallow and almost non-tidal soft-bottom bays in Gullmarsfjorden on the Swedish west coast. Again, a significant negative density-dependent effect on Corophium was found. This effect was even stronger when A. marina and C. edule occurred together. A. marina and C. edule affected the numbers of the two sexes of C. valutator in a similar way. However, in the treatments with high densities of A. marina and C. edule the proportion of females with eggs and the mean lengths of the females were lower resulting in a lower reproductive output. Surveys of several bays along Gullmarsfjorden showed that the bay-to-bay variability in the abundance of C. volutator could not be explained by differences in abundances of A. marina, C. edule or Nereis diversicalor. Within the only two bays with locally high densities of A. marina the densities of C. volutator showed a clear negative relationship with those of A. marina. In conclusion: at a small scale the abundance of C. volutator is closely related to densities of A. marina and C. edule, but at a larger scale other factors must be of more importance. 14 pp., 11 figs, gr. 8.

N° de réf. du vendeur W22220

Détails bibliographiques

Titre
Effects of Arenicola marina and Cerastoderma edule on distribution, abundance and population structure of Corophium volutator in Gullmarsfjorden Western Sweden
Auteur
Flach, E. C. & de Bruin, W.
Année de publication
1993

ConchBooks

Harxheim, Allemagne

Vendeur avec une évaluation de 4 étoiles

Vendeur AbeBooks depuis 1 mars 2007

Frais d'expédition de Allemagne vers Etats-Unis

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Founded in 1985 we are specialized in worldwide literature on Mollusca and marine invertebrates. Our publishing house has meanwhile published approximately 60 titles on that field of interest. We have stocks of most available international books on Malacology and a huge amount of antiquarian literature, even of the latter most titles are only available once.

Spécialité

Weichtiere / Shells, Schnecken / Snails & Slugs, Muscheln / Bivalves, Tintenfische / Squids / Octopusses / Ammonites, Malacology, Conchology, Marine Biology