there are many freshwater snails involved in the life cycle of parasitic flukes. some of these animals, such as bulinus spp and lymnaea spp are very important in public health and veterinary medicine. for example, bulinus trucatus and lymnaeid snails transmit human bilharziosis and zoonotic fascioliosis, respectively. for this reason most freshwater bodies of northern iran, were searched for po...

The specificity of the arylsulphatase and glycosulphatase enzymes of the marine mollusc Charonia lampas towards a number of carbohydrate sulphate esters was examined. The results confirm that the relationship between the established nomenclature of the two enzymes and their respective specificities is inconsistent.

Evolutionary Aspects of Neuropeptides and their Genes Structure and evolution of insulin and insulin-like growth factors in chordates p. 15 Relationships among the FMRFamide-like peptides p. 25 Molecular evolution of neurohypophysial hormone precursors p. 39 A vasopressin-related peptide in the mollusc Lymnaea stagnalis: Peptide structure, prohormone organization, evolutionary and functional as...

Knowledge of the population dynamics of parasites and their hosts is essential to build veterinary and health programs. The example chosen is that of Fasciola hepatica, a food-borne trematode responsible for severe human and animal infections on the five continents. In this paper, we review the relationships between the liver fluke and its intermediate (mollusc) and definitive (vertebrate) hosts.

BACKGROUND Tropical marine molluscs are traded globally. Larger species with slow life histories are under threat from over-exploitation. We report on the trade in protected marine mollusc shells in and from Java and Bali, Indonesia. Since 1987 twelve species of marine molluscs are protected under Indonesian law to shield them from overexploitation. Despite this protection they are traded openl...

Marine aquaculture releases mollusc shell debris which can accumulate on the seabed. Due to its low degradability, becomes integrated into sediment, modifying both structure and associated biogeochemical processes. These changes are expected influence biological assemblages within play a key role in processes due bioturbation. We performed an in-situ experiment test effects of shell-hash biotur...

In the present work, well radiocarbon-dated Quaternary malacological and palynological analyses were implemented on 4 cm samples deriving from one of thickest best developed last glacial sequences Central Europe Madaras brickyard borehole Kolon Lake in southern part Hungary. Using a combination mollusc, anthracological, climatic proxies evidence preserved within loess, we demonstrate that long-...

The study of the Neolithic period in Lake Eyasi Basin was dominated by attempts to formulate area’s chronology, mobility, settlement patterns, subsistence, and cultural capabilities people as attested domesticated animals, pottery, lithic artefacts. Occasionally, studies on molluscs were mentioned, but rarely described detail. sites across have yielded remains both terrestrial (gastropods) fres...