engleski

The Results of European Flat Oyster (Ostrea edulis) Cultivation at Different Growth Depth

Studies of different grow out gears in Malostonski Bay, known for oyster cultivation, gave the best survival results for cultivation of European flat oyster (Ostrea edulis) in “ poches” . The aim of this research was to establish the most suitable growth depth in correlation to survival rate and weight gain of market size flat oyster. An experiment was carried out on two different locations ; Kuta and Stonska Luka. On both locations the same experiments were designed. There were three experimental groups consisting of four subgroups with 25 one year old animals of the same origin and approximately same length and weight. In the location “ Kuta” the first group was situated 1 m under the water surface, the second 3 m, and the third 5 m under the water surface. At the another location “ Stonska Luka” the first group was situated also 1 m under the water surface, the second was 5 m and the third was 10 m under the water surface. All grow out gears were attached to the ropes of the same shellfish farm which ensured them very similar environmental conditions through the course of the experiment. Each three months samples were collected and the parameters of growth were measured (length of the shell, total weight of the each animal, wet weight of the soft tissue, wet weight of the shells, volume of the whole animal and volume of the shells, dry weight of the soft tissue and dry weight of the shells). The CI (Condition index) according to Hopkins in each experimental group was estimated and the survival rate was noted. The results of the experiment indicated that there some differences between two location but on the both location the survival rate and growth results were better in the groups situated in the deeper layer of the water column (3 and 5 m).

Flat Oyster; Cultivation; Growth depth

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