By R. N. Hughes (auth.), P. J. Mill, C. D. McQuaid (eds.)
Members of the gastropod relatives Littorinidae are universal in the course of the international. They shape a truly considerable portion of many intertidal and shallow subtidal ecosystems and, by way of their grazing, usually play a vital position in shaping those groups. in addition they exhibit quite a lot of lifestyles heritage innovations and plenty of are polymorphic, making them appealing version organisms for ecologists, evolutionary biologists and physiologists alike. parts of specific curiosity contain ecological interactions with different animals and with algae, the consequences of pollution and using littorinids as sentinel species for tracking pollutants, the results of parasites on progress and ecology, taxonomy, and the learn of genotypic/phenotypic responses to environmental components. there's nonetheless a lot to be performed, and the littorinids are proving to be a fantastic team on which to paintings.
Audience: essentially certain on the examine point. also will offer worthy details for complex first-degree scholars accomplishing learn projects.
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Participants of the gastropod relations Littorinidae are universal in the course of the global. They shape a truly ample part of many intertidal and shallow subtidal ecosystems and, by means of their grazing, usually play a relevant function in shaping those groups. in addition they exhibit quite a lot of lifestyles historical past concepts and plenty of are polymorphic, making them beautiful version organisms for ecologists, evolutionary biologists and physiologists alike.
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Additional resources for Advances in Littorinid Biology: Proceedings of the Fourth International Symposium on Littorinid Biology, held in Roscoff, France, 19–25 September 1993
1. Map of France indicating the position of three sites: Luc-sur-Mer (A). , 1987): RPSI = [(mean female penis length) 3/ (mean male penis length)3] x 100 VDSI Some aphallic Nucella (males and females) were sampled at polluted sites from the Brest region (Fig. 1). Such a phenomenon has been recorded by Gibbs (1993) for a polluted English site and seems to have a genetic basis. Thus aphallic animals were considered to be non-imposex and therefore discarded from the calculation of indices. 1 mm. VDS stages extend from 0 to 6 on the scale of Gibbs etal.
Fioroni2 , J. Oehlmann2 & E. A. S. ) reveals that Nucella is the most TBT sensitive species while Hinia is the least sensitive. Of the two imposex indices VDSI and RPSI, good interspecies correlations were obtained only for VDSI. The three species can be considered as complementary not only in terms of their ecology but also for their levels of sensitivity. Indeed, Nucella and Ocenebra are useful test species at TBT concentrations below 2 ng Sn I-I while Hinia is the more appropriate species at higher TBT levels.
Angulo & J. Moya, 1986b. Copper treatment of the digestive gland of the slug Arion ater L. 2. Morphometrics and histophysiology. Bull. envir. Contam. Toxic. 36: 608~15. Marigomez, J. , V. Saez, M. P. Cajaraville & E. Angulo, 1990. A planimetric study of the mean epithelial thickness of the molluscan digestive gland over the tidal cycle and under environmental stress conditions. Helgoliinder wiss Meeresunters. 44: 81-94. Marigomez, J. , M. Soto & E. Angulo, 1991. Responses of winkles digestive cells and their lysosomal system to environmental salinity changes.
Advances in Littorinid Biology: Proceedings of the Fourth International Symposium on Littorinid Biology, held in Roscoff, France, 19–25 September 1993 by R. N. Hughes (auth.), P. J. Mill, C. D. McQuaid (eds.)