. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . -58N 175 170 165w Figure 34-4. Release and recovery locations of yellowfin sole tagged by Japanese research vessels in 1970 and 1971 and recovered by commercial fishing vessels (from Wakabayashi et al. 1977). Numbers of fish released are shown at each tagging location; a few fish (as indicated by light dashed lines) were released by commercial vessels. The heavy dashed line between St. George Island and Cape Avinof represents the line separating proposed north and south stock areas. rela
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . -58N 175 170 165w Figure 34-4. Release and recovery locations of yellowfin sole tagged by Japanese research vessels in 1970 and 1971 and recovered by commercial fishing vessels (from Wakabayashi et al. 1977). Numbers of fish released are shown at each tagging location; a few fish (as indicated by light dashed lines) were released by commercial vessels. The heavy dashed line between St. George Island and Cape Avinof represents the line separating proposed north and south stock areas. relatively strong year-classes originating in the years 1966-70. Research vessel data indicate that the 1971 and 1972 year-classes may not be as abundant as those of 1966-70 but the 1973 year-class may be of above average strength. Size and age at maturity and recruitment to the fishery Male yellowfin sole begin to mature at a length of cm, females at cm (Wakabayashi 1974; see also Fig. 34-7). The length at which 50 percent of the population is mature is cm for males aind cm for females. All males are mature at 25 cm and most females at 30 cm. On the basis of samples collected in 1959-64, Fadeev (1970a) reported that males first begin to mature at 12 cm and females at 16-18 cm but that 50 percent of the population reached maturity at 16-18 cm for males and 30-32 cm for females. Wakabayashi (1974) suggests that fish may have matured at a smaller size in 1973 because the population was less abundant than in 1959-64. Females begin to mature at age six and 50 percent reach maturity at about age nine; all the females were mature at age 15 (Fig. 34-7). Yellowfin sole first become recruited to the fishery at 13 or 14 cm, which corresponds to age four or five. They become fully recruited to the fishery at age
Size: 2567px × 1948px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookcollectionamericana, bookleafnumber582
