Comments on the biological basis of management of the commercial fisheries of the eastern Bering Sea and some relevant observations about fisheries management off New England

1988 ◽  
pp. 210-216
Author(s):  
Michael P. Sissenwine
Keyword(s):  
New England ◽  
Fisheries Management ◽  
Bering Sea ◽  
Commercial Fisheries ◽  
Biological Basis ◽  
Eastern Bering Sea

scholarly journals Fisheries management for regime-based ecosystems: a management strategy evaluation for the snow crab fishery in the eastern Bering Sea

2012 ◽  
Vol 70 (5) ◽  
pp. 955-967 ◽  
Author(s):  
Cody S. Szuwalski ◽  
André E. Punt
Keyword(s):  
Fisheries Management ◽  
Bering Sea ◽  
Management Strategy ◽  
Management Strategies ◽  
Regime Shifts ◽  
Snow Crab ◽  
Management Strategy Evaluation ◽  
Eastern Bering Sea ◽  
Strategy Evaluation ◽  
Spawning Biomass

Abstract Szuwalski, C., and Punt A. E. 2013. Fisheries management for regime-based ecosystems: a management strategy evaluation for the snow crab fishery in the eastern Bering Sea. – ICES Journal of Marine Science, 70: 955–967. Regime shifts are a prominent feature of the physical environment of some ecosystems and have the potential to influence stock productivity. However, few management strategies or harvest control rules (HCRs) consider the possibility of changes in stock productivity. A management strategy evaluation is conducted for the snow crab (Chionoecetes opilio) fishery in the eastern Bering Sea, an ecosystem influenced by regime shifts. Operating models that project recruitment as a single average (i.e. the current basis for management advice), regime-based with no relationship between recruitment and spawning biomass, and regime-based with control of recruitment oscillating between environmental conditions and spawning biomass are considered. An HCR that accounts for shifts in recruitment regime is compared with the status quo HCR for each operating model. The regime-based HCR increases yield and decreases variability in yield at the cost of a higher probability of overfishing in regime-based systems. However, the regime-based HCR slightly decreases yield (no change in variability) and increases the probability of overfishing in non-regime-based systems. Identifying changes in productivity that are definitely driven by environmental regime rather than fishing pressure is the largest difficulty in implementing these rules.

scholarly journals Bottom–Up Impacts of Forecasted Climate Change on the Eastern Bering Sea Food Web

2021 ◽  
Vol 8 ◽  
Author(s):  
George A. Whitehouse ◽  
Kerim Y. Aydin ◽  
Anne B. Hollowed ◽  
Kirstin K. Holsman ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Climate Change ◽  
Food Web ◽  
Fisheries Management ◽  
Bering Sea ◽  
Status Quo ◽  
Ecosystem Dynamics ◽  
Trophic Levels ◽  
Emission Scenarios ◽  
Bottom Up ◽  
Eastern Bering Sea

Recent observations of record low winter sea-ice coverage and warming water temperatures in the eastern Bering Sea have signaled the potential impacts of climate change on this ecosystem, which have implications for commercial fisheries production. We investigate the impacts of forecasted climate change on the eastern Bering Sea food web through the end of the century under medium- and high-emissions climate scenarios in combination with a selection of fisheries management strategies by conducting simulations using a dynamic food web model. The outputs from three global earth system models run under two greenhouse gas emission scenarios were dynamically downscaled using a regional ocean and biogeochemical model to project ecosystem dynamics at the base of the food web. Four fishing scenarios were explored: status quo, no fishing, and two scenarios that alternatively assume increased fishing emphasis on either gadids or flatfishes. Annual fishery quotas were dynamically simulated by combining harvest control rules based on model-simulated stock biomass, while incorporating social and economic tradeoffs induced by the Bering Sea’s combined groundfish harvest cap. There was little predicted difference between the status quo and no fishing scenario for most managed groundfish species biomasses at the end of the century, regardless of emission scenario. Under the status quo fishing scenario, biomass projections for most species and functional groups across trophic levels showed a slow but steady decline toward the end of the century, and most groups were near or below recent historical (1991–2017) biomass levels by 2080. The bottom–up effects of declines in biomass at lower trophic levels as forecasted by the climate-enhanced lower trophic level modeling, drove the biomass trends at higher trophic levels. By 2080, the biomass projections for species and trophic guilds showed very little difference between emission scenarios. Our method for climate-enhanced food web projections can support fisheries managers by informing strategic guidance on the long-term impacts of ecosystem productivity shifts driven by climate change on commercial species and the food web, and how those impacts may interact with different fisheries management scenarios.

Modern Industrial Fisheries Management

Overfishing ◽  
2012 ◽  
Author(s):  
Ray Hilborn ◽  
Ulrike Hilborn
Keyword(s):  
Fisheries Management ◽  
Bering Sea ◽  
Bluefin Tuna ◽  
Eastern Bering Sea

What is an example of a well-managed fishery? On September 10, 2009, the Economist published an article on Bluefin tuna and Eastern Bering Sea pollock entitled “A Tale of Two Fisheries: How to Pillage the Oceans Deliberately, and by Accident.” The article...

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