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A class of the phylum Mollusca that includes the snails, whelks, slugs, and limpets.
[gastro- + G. pous (pod-), foot]
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This fusion into a single scar probably foreshadows the presence of only a single columellar scar in most extant gastropods (Fretter & Graham 1994) as a response to increasing anisostrophism and realignment of the axis of coiling (Linsley 1977; McNair et al.
The fossil record suggests absence of feeding by larval molluscs of the Cambrian, which in turn suggests absence of a metatroch in ancestral gastropods and bivalves.
However, many species of gastropods are included to the life cycle of helminths and the epizootic chain of domestic animals' invasive diseases, in particular Fasciola and Paramphistomum invasion of cattle.
It is also important to understand the life history of gastropods; the larval development strategy (i.e., free-swimming versus direct development) should be known as well as an estimate of when statolith growth might slow enough during the annual cycle for a growth ring to form.
The main goal of this work was extending the knowledge on sterols from marine gastropods especially from the genus Telescopium.
Predation on bivalve mollusks by gastropod mollusks is common in coastal regions; however, few studies have examined whether predatory gastropod mollusks exhibit prey selection.
Annual infection rates in gastropods vary relative to temperature, moisture, and the duration of conditions suitable for activity.
In India, till today, 5070 species of mollusca have been recorded of which 3370 species are from marine habitats [49].Molluscs frommarine habitat of India, belonging to 220 families and 591 genera, of which 1900 are gastropods, 1100 are bivalves, 210 are cephalopods, 41 are polyplacophores and 20 are scaphopods [2, 51].
Sandy beaches are inhabited by burrowing bivalves and gastropods. Examples of bivalves inhabit intertidal sandy flats and sandy beaches are Glycymeris, Ctena, Divalinga, Cardites, Acrosterigma, Mactra, Asaphis, Hiatula, Circe, Circenita, Gafrarium, Calista, Dosinia and Maria.
Our farm is at the top of a well-drained ridge; we don't have the abundance of large snails and giant slugs that plague gardeners in Pacific states; and our usually droughty warm-weather conditions are not conducive to large populations of the tiny gastropods we do have.
Changes in the chemical environment of aquatic ecosystems, such as elevated pesticide and heavy metals concentrations, may hinder chemoreception in many freshwater organisms including fish, gastropods, crustaceans, and amphibians (Blaxter and Hallers-Tjabbes, 1992; Lefcort et al., 1999; Luring and Scheffer, 2007).