. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Catches of other small flounders consist mainly of rock sole and flathead sole, but include a number of other species such as Alaska plaice, starry flounder, longhead dab, and rex sole. These species are taken incidentally in the pollock and yellowfin sole fisher- ies. Concentrations of these species in Japanese catches in 1977 were widely distributed from depths of less than 100 m off Bristol Bay to near the shelf edge northwest of the Pribilof Islands (Fig. 60-
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Catches of other small flounders consist mainly of rock sole and flathead sole, but include a number of other species such as Alaska plaice, starry flounder, longhead dab, and rex sole. These species are taken incidentally in the pollock and yellowfin sole fisher- ies. Concentrations of these species in Japanese catches in 1977 were widely distributed from depths of less than 100 m off Bristol Bay to near the shelf edge northwest of the Pribilof Islands (Fig. 60-11). Catches in shallower regions of the southeast Bering Sea were principally rock sole and Alaska plaice, and those in deeper waters of the southeast Bering Sea and northwest of the Pribilof Islands were princi- pally flathead sole and rock â ^^-^-^ Figure 60-10. Distribution of Japanese catches of yellow- fin sole in 1977. Figure 60-11. Distribution of Japanese catches of "other flounders" in 1977. Apparent effect of the fisheries on the resources Foreign fisheries may have reduced the demersal fishery resources of the eastern Bering Sea consider- ably. Substantial reductions in abundance of most of the target species have been observed; some of these have undoubtedly been the direct result of high exploitation rates. The declines in abundance of yellowfin sole and Pacific halibut in early stages of the commercial fishery and in Pacific ocean perch, sablefish, and pollock in later stages have probably resulted, wholly or partly, from overexploitation. Other commercial species which are primarily taken as a by-catch of the pollock and yellowfin sole fisheries have shown little evidence of substantial reductions in abundance. However, assessment data for these nontarget species from commercial opera- tions and research vessel surveys have not been as good as those for target species. Sharp declines in relative abundance (catch-per- unit-effort, CPUE) in the c
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