LENGTH WEIGHT RELATIONSHIP AND CONDITIONFACTOROFPERIWINKLE FROM KOKO ESTUARY, WARRI, DELTA STATE, NIGERIA
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Abstract
Shellfish is a fisheries and culinary term for exoskeleton-bearing aquatic invertebrates usedasfood (Ehigiator and Oterai, 2012) including various species of molluscs, crustaceans, andechinoderms. Despite the name, shellfish are not fish. Most shellfish are lowon the foodchainand eat a diet composed primarily of phytoplankton and zooplankton. Shellfishes comprisesofinvertebrate animals such as periwinkle, rock snail, oyster and crabs which possessesexoskeleton called shells which may be single or double over the body (Amadi, 2015).
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