Estimates of the total number of black rockfish, Sebastes schlegeli, caught by commercial and recreational fishing boats and surf fishing
2001
Onodera, T. (Miyagi-ken. Interior Water Experiment Station, Yamato (Japan)) | Kikuchi, Y. | Mizuma, T. | Sato, K. | Fujita, N.
Stocking of the black rock fish, Sebastes schlegeli, started in Shizugawa Bay in 1983. The total number of fish landed at the Shizugawa Fish Market and the Kesennuma Fish Market, which is also located near Shizugawa Bay, increased by 27 fold from 1984 (1,300 inds) to 1991 (35,100 inds), but then started to decline and reached 6,000 inds in 1999. In order to examine the cause of the decrease of the number of black rock fish landed at the local markets, we estimated the number of fish caught by recreational party fishing boats, recreational surf fishing and the fish traded outside the fish markets by commercial fishermen, mainly by means of questionnaires to the fishermen. Consequently it was estimated that 37% of total catch (number) in Shizugawa Bay were landed at the two local fish markets, 28% were caught by recreational fishing boats, 4% by surf fishing, 9% were consumed by commercial fishermen themselves and 22% being sold to live fish markets and not through the local fish markets. Including the numbers of fish which were not landed at the two local fish markets, the annual total number of black rock fish caught in Shizugawa Bay was estimated to range from 25,000 to 45,000 and the total return rates of stocked fish from 8 to 15% in recent years.
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