西海岸 김 養殖場에 關한 硏究(Ⅴ. 沃溝海岸 養殖 김의 生育과 生産量 分析)

Studies on the Cultural Grounds of Laver in Western Coast of Korea(V. Analysis of Growth and Production on the Cultural Laver in Okku Coast)

As a part of the biological primary investigation of the cultural laver farms at Okku coastal area in order to investigated the growth and production of cultural laver, at the Haje, Okson. Oshik-to and Piung-do a fraternity of fishing viIlages in Okku-gun of Chunbuk province were selected, and all the laver culturing grounds were investigated every month during the laver culturing period from November 1989 to March 1990. Samples were taken randomly at each laver ground stations, and the length, width, wet and dry weight of laver blades were checked about 30 individuals per 10cm laver net string. As quantitative analysis of culturing laver growth, length, width, blade area, wet and dry weight of laver were compared with by each culturing grounds, and qualitative analysis of culturing laver growth, on the length and width of laver, morphological variations were compared with the growing condition of each grounds by having allometric growth coefficient. On the analysis of covarience of allometric growth length and width in the laver culturing grounds a four fraternity of fishing village, the significant difference of b-test was admitted Haje between Okson(F^(1)_(68)=5.31, P<0,05), and Oshik-to(F^(1)_(83)=8.442, P<0.01) grounds. a-test was admitted only Haje between Okson ground(F^(1)_(89)=11.47, P<0.0l), but between the other laver culturing grounds were not admitted. The allometric growth rate of width between length in the culturing lavers were represented Oshik-to 0.8826 mm/month. Okson 0.7210 mm/month, Piung-do 0.2287 mm/month and Haje 0.0409 mm/month in order, and t-test of allometric growth coefficient was not admitted(p<0.01) the significant difference among the all laver grounds of Haje(t=68,02), Okson(t=27.90). Oshik-to(t=I1.74) and Piung-do(t=44.58). So growth pattern, of culturing laver were represented by inequa!itie growth equation with the lapsed time. The mean blade areas on the net string a per unit(10cm) was Oshik-to 147.9㎠i to 93.9~211.3 ㎠. Piung-<lo 106.7㎠ to 94.5~127.0㎠. Okson 99.2㎠ to 59.5~24.8㎠ and Haje 75.5㎠ to 54.5~94.7㎠, wet weight was Piung-do 5.30g to 2.22~9.73g, Oshik-to 5.08g to 3.85~6.13g, Okson 4.15g to 2.35~6.66g and Haje 2.89g to 0.99~4.32g, dry weight was Oshik-to 0.82g to 0.51~1.12g. Piung-do 0.73g to 0.34~1.18g. Okson O.69g to 0.38~1.10g and Haje 0.44g to 0.16~0.70g, numbers of individual was Haje 1,233, Okson 1,144, Piung-do 991 and Oshik-to 844 in respectivly. The gross production per chaek to blade area and individuals per unit a net string that were estimated by production of culturing laver was calculated by following formula, and the mean gross production per chack was Okson 19.9 sok/chaek to 11.7~24.7 sok/chaek, Oshik-to 17.4 sok/chaek to 13.8~19.7 sok/chaek, Piung-do 18.2 sok/chaek to 16.6~20.1 sok/chaek and Haje 17.2 sok/chaek to 7.5~23.0 sok/chaek in respectively. On the whole, a mean production with the total grounds, months and cutting numbers in the laver culturing grounds of Okku coastal area were estimated 109.2 sok/chaek by production of blade area, individual, net and gross. Net production=(individual×total blade area)×2.14 Gross production=(net production/100)×6