A preliminary study of growth in Cerithidea (Cerithweopsilla) fluviatilis (Potiez and Michaud), (Prosobranchia-Gastropoda)

Ramamoorthi, K and Alagaraja, K (1968) A preliminary study of growth in Cerithidea (Cerithweopsilla) fluviatilis (Potiez and Michaud), (Prosobranchia-Gastropoda). In: Proceedings of the symposium on Mollusca, CochinPart II, MBAI, 12-16 January 1968, Cochin.

[img]
Preview
PDF
137Kb

Abstract

Observations on the growth of Cerithidea (Cerithideopsilla) fluviatilis in the Vcllar estuary have been in progress for over six months. Weekly samples were collected and linear measurements were recorded for a total number of 13,300 specimens. The samples showed unimodal frequency. The heavy aggregation of young on«s during July and August and the unimodal frequency distribution would indicate that there is only one breeding season in the year. In the interior parts of inlets and creeks during flood time and at other times also over-sized specimens above 23 mm. were observed whereas only large number of dead ones infested with crabs were noticed during flood time in the sampling area. This is apparently due to differential survival, the over-sized specimens taking shelter in creeks.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Cerithidea fluviatilis; Cerithweopsilla; Prosobranchia; Gastropoda
Subjects:Molluscan Fisheries > Gastropods
Divisions:CMFRI-Cochin > Marine Capture > Molluscan Fisheries
ID Code:6800
Deposited By:Arun Surendran
Deposited On:02 Dec 2010 10:29
Last Modified:02 Dec 2010 10:29

Repository Staff Only: item control page