We tested the relative strength of direct versus indirect effects of an aquatic omnivore depending on the functional composition of grazers by manipulating the presence of gastropod and amphipod grazers and omnivorous shrimp in outdoor mesocosms. By selectively preying upon amphipods and reducing their abundance by 70-80%, omnivorous shrimp favoured the dominance of gastropods. While gastropods...

Thermostable direct hemolysin-producing strain of Vibrio parahaemolyticus was not detected from the alimentary tract of 7 neritid gastropods including Clithon retropictus at 9 estuaries of Southwest Islands in Japan in the present study. The strain has been detected from C. retropictus at 2 estuaries facing The Sea of Japan but not at 2 estuaries facing The Seto Inland Sea and The Pacific Ocean...

New islands present the perfect opportunity for a species to get a fresh start and undergo adaptive radiation. For Galápagos land snails, both competition and resource diversity have together led to opportunity knocking twice.

Sixteen species belonging to 9 families of gastropods and bivalves have been recorded from Huneish island, Yemen. Measurments, diagnosis coloured photos for every specimen were provided .

3 Cole, L. J., W. E. Davis, R. M. Garver, and V. J. Rosen, Jr., Transpl. Bull., 26, 142 (1960). 4 Santos, G. W., R. M. Garver, and L. J. Cole, J. Nat. Cancer Inst., 24, 1367 (1960). I Barnes, D. W. H., and J. F. Loutit, Proc. Roy. Soc. B., 150, 131 (1959). 6 Koller, P. C., and S. M. A. Doak, in "Immediate and Low Level Effects of Ionizing Radiations," Conference held in Venice, June, 1959, Spec...

The fossil record of marine gastropods has been used as evidence to support the operation of species selection; namely, that species with limited dispersal differentially increase in numbers because they are more likely to speciate than widely dispersing species. This conclusion is based on a tacit phylogenetic assumption that increases in species with limited dispersal are solely the result of...

We give the results from the first investigation focused on the land snail fauna in Srebarna Nature Reserve in Bulgaria. A total of 23 localities were studied and 27 species of terrestrial gastropods were found, 23 of which were new observations for the Reserve.