DENSITY AND REPRODUCTIVE PATTERN OF <i>Rhinoclavissinensis</i>, Gmelin 1791 (GASTROPODA: CERITHIIDAE) AT THE KRAKAL BEACH, YOGYAKARTA
Abstract
Krakal Beach Yogyakarta was the most disturbed beach among others in Yogyakarta in term of shells exploitation. Those shells had been traded not only locally at Krakal Beach, but also to Kukup Beach, Baron Beach,Yogyakarta city and for export purpose in the form of raw or handicraft material. Those activities makes the beach condition even much worse.
Some researches were done to reveal whether exploitations were done by tourists (Andiet al. 2005) or local people (Zahidaet al. 2005), and the researched showed that it caused by local people. Further research wanted to elucidate the intensity and volume of harvested shells (Zahida and Sinulingga 2004), and the results showed that more shells were harvested before adults. This was an indication of overharvesting.
Overharvesting or commonly called as overfishing status of the shells exploitation was studied in Krakal Beach, Yogyakarta. King (2003) stated that the exploitation of gastropods for their shells is unquantified, but may account for a much larger live catch weight than does exploitation for food. The aim of this research was to study the density and reproductive pattern of R. sinensis from Krakal Beach, Yogyakarta.
References
Andi, S.A., F. Zahida, and B.B.R. Sidharta. 2005. Preliminary study of marine snails harvesting (Gastropods) at Krakal Beach, Yogyakarta III: Tourists activities. Biota X: 114-119.
Dharma, B. 2005.Recent and Fossil Indonesia Shells. ConchBook, Jakarta.
Hartati, R., and Widianingsih. 2009. Identification and abundance of Gastropods in Mangrove area IjoBodo River Kebumen and Adiraja River Cilacap. Pages II 120-129 in F. Yulianda, N.T.M. Pratiwi, Y. Mayalanda, & M.R. Cordova, eds. Proceeding of National Seminar of Mollusks 2. Department of Resource Management, Faculty of Fisheries and Marine Science, IPB, Bogor.
Hasri, I., F. Yulianda, and I. Dewiyanti. 2009. Mollusks community structure (Gastropods and Bivalvia) and its association to Mangrove Ecosystem, UleeLheue Beach Banda Aceh, NAD. Pages II 130-150in F. Yulianda, N.T.M. Pratiwi, Y. Mayalanda, & M.R. Cordova, eds. Proceeding of National Seminar of Mollusks 2. Department of Resource Management, Faculty of Fisheries and Marine Science, IPB, Bogor.
Houbrick, R.S. 1978. The Family Cerithiidae in the Indo-Pacific Part 1: The genera Rhinoclavis, Pseudovertagus and Clavocerithium. American Malacologist, Inc.
King, M. 2003. Fisheries Biology Assessment and Management. Blackwell Science.
Lester, N.P., B.J. Shutter, and P.A. Abrams. 2004. Interpreting the von Bertallanffy model of somatic growth in fishes: the cost of reproduction. Proceeding of the Royal Society London 271: 1625-1631.
Roy, K., A.G. Collins, B.J. Becker, E. Begovic, and J.M. Engle. 2003. Antropogenic impacts and historical decline in body size of rocky intertidal gastropods in Southern California. Ecology Letters 6: 205-211.
Ujianti, R.M.D., B. Hendrarto, and S. Rudiyanti. 2009. Distribution and abundance of Gastropoda at mangrove area Surodadi Village, Sayung Municipality Demak, pages II 151-160 in F. Yulianda, N.T.M. Pratiwi, Y. Mayalanda, & M.R. Cordova, eds. Proceeding of National Seminar of Mollusks 2. Department of Resource Management, Faculty of Fisheries and Marine Science, IPB, Bogor.
Zahida, F., M.B. Sinulingga, and W.N. Jati. 2005. Preliminary study of marine snail harvesting (Gastropods) at Krakal Beach, Yogyakarta II: Harvesters activities. Biota X: 24-30.
Zahida, F., and M.B. Sinulingga. 2004. Preliminary study of marine snail harvesting (Gastropods) at Krakal Beach, Yogyakarta I: Harvest volume. Biota IX: 136-143.
Zahida, F. 1999. Assessment of some characters of Pomaceacanaliculata spp. In Luzon, Philippines: I. Breeding, Operculum, and Anatomy of Reproductive System. Biota IV: 11-21.