Aspects Of Littorinid Biology: Proceedings Of The Fifth International Symposium On Littorinid Biology, Held In Cork, Ireland, 7-13 September 1996 (developments In Hydrobiology)

Members of the family Littorinidae are among the most widely studied gastropod molluscs and the more questions we answer about this group, the more questions are inevitably posed. Littorinid research spans diverse disciplines, from molecular biology, physiology, ecology, systematics and evolutionary biology to elegant anatomical studies. The papers n this volume reflect the current research being carried out on littorinids, and fall into three broad themes: systematics, ecology, and pollution studies. This book is primarily targeted at the research level, while providing useful information for advanced first-degree students conducting research projects. Front Matter....Pages i-xi Genetic variability in Littorina saxatilis from different habitats on an island in Galway Bay....Pages 1-10 Electrophoretic heterogeneity within and between flat periwinkles (Mollusca: Gastropoda) along an intertidal transect at Ria Ferrol, northwest Spain....Pages 11-19 A preliminary study on genetic differentiation in Littorina saxatilis from Galway Bay, Ireland: Littorina tenebrosa Montagu — a valid species or ecotype?....Pages 21-25 Lack of significant esterase and myoglobin differentiation in the periwinkle, Littorina striata (Gastropoda, Prosobranchia)....Pages 27-32 A comparison of different protocols for RAPD analysis of Littorina ....Pages 33-42 Radular myoglobin and protein variation within and among some littorinid species (Mollusca: Gastropoda)....Pages 43-51 Allozyme variation and behavioural dimorphism among populations of Littorina brevicula (Philippi) from Japan....Pages 53-57 Sexual selection and assortative mating by size and their roles in the maintenance of a polymorphism in Swedish Littorina saxatilis populations....Pages 59-69 Rough periwinkle polymorphism on the east coast of Yorkshire: comparison of RAPD-DNA data with morphotype....Pages 71-78 Assortative mating between two distinct micro-allopatric populations of Littorina saxatilis (Olivi) on the northeast coast of England....Pages 79-88 Natural selection on a vertical environmental gradient in Littorina saxatilis : analysis of fecundity....Pages 89-94 Effects of habitat on growth and shape of contrasting phenotypes of Bembicium vittatum Philippi in the Houtman Abrolhos Islands, Western Australia....Pages 95-103 Increasing precision in randomised field experiments: barnacle microtopography as a predictor of Littorina abundance....Pages 105-114 Temporal variation in parasite loading in relation to life history patterns of Littorina obtusata and L. fabalis ....Pages 115-127 Gills and size in some small Littorina ....Pages 129-132 A hot summer, cold winters, and the geographical limit of Trochocochlea lineata in Somerset....Pages 133-141 Density and shell-size variation of Nodilittorina lineolata (Orbigny, 1840) in the intertidal region in southeastern Brazil....Pages 143-148 Spawning periodicity of three species of Nodilittorina in Hong Kong....Pages 149-160 What to do when there is nothing to do: the ecology of Jamaican intertidal Littorinidae (Gastropoda: Prosobranchia) in repose....Pages 161-185 Seasonal variation in soluble uric acid concentration in Littorina saxatilis (Olivi)....Pages 187-191 Intersex and Littorina littorea in Cork Harbour: results of a medium-term monitoring programme....Pages 193-197 Imposex in Nucella lapillus and intersex in Littorina littorea : interspecific comparison of two TBT-induced effects and their geographical uniformity....Pages 199-213 Toxico-kinetic and -dynamic aspects of TBT-induced imposex in Hydrobia ulvae compared with intersex in Littorina littorea (Gastropoda, Prosobranchia)....Pages 215-225 Ultrastructure of prostate gland tissue in males and females with intersex phenomena of Littorina littorea L.....Pages 227-233 Diet in Littoraria ....Pages 235-236 A novel method to assess the cercariae emission intensity of littorinid populations....Pages 237-239 Additional records of rough periwinkles in northwest Scotland....Pages 241-242 Epilogue....Pages 243-246 Back Matter....Pages 247-248