Izlaganje sa skupa
SHELLFISH OF THE RIVER KRKA MOUTH - FISHING AND FARMING
D. Marguš
E. Teskeredžić
Sažetak
Krka River spring is at the foot of Dinara mountain, starting from a 22 m high Topoljski waterfall. Its length is 72.5 km, and total slope 242 m. The length of freshwater waterway is 49 km and brackish waterway, i. e. flooded river mouth, 23.5 km long. Impact of seawater and depth of surface fresh water greatly vary depending on the river waterlevel, local precipitation, tides and wind directions. Owing to the extensive primary production in the river mouth shellfish are abundantly present with 56 species. The most abundant are Mediterranean mussel (Mytilus galloprouincialis) and flat oyster (Ostrea edulis), and partly common cockle (Cerastoderma glaucum), Venus shell (Venus verucosa), calico clam (Tapes decussates), Noah's arc (Arca noae), variegated scallop (Chlamis uaria) and Pilgrim's scallop (Pecten jacobaeus). Owing to very productive processes in the ecosystem of river mouth, fishing in the area is traditionally practice. The knowledge about natural populations of Mediterranean mussel fished out in quantities larger than 100 t/y have initiated the research on since 1979 shellfish in this area. Investigations on possibilities of commercial farming of Mediterranean mussel, flat oyster, variegated scallop and Pilgrim's scallop (Pecten jacobaeus) resulted in defining the technological procedure for commercial farming of Mediterranean mussel and flat oyster (1983), and variegated scallop and Pilgrim's scallop (1989). Nowadays at 25 localities of 87.000 m2 area and with 19 concessions a total production around 1500 t/y of Mediterranean mussel and about 10.000 pieces of flat oyster is provided, and there is also significant possibility to increase production up to 10.000 tons.
Ključne riječi
shellfishes; farming; river Krka mouth
Hrčak ID:
14735
URI
Datum izdavanja:
31.3.2004.
Posjeta: 1.979 *