Adapting the operation of cascaded reservoirs on Yuan River for fish habitat conservation

2016 ◽  
Vol 337 ◽  
pp. 221-230 ◽  
Author(s):  
Xin Wen ◽  
Guo-hua Fang ◽  
Yu-xue Guo ◽  
Lei Zhou
Fisheries ◽  
2016 ◽  
Vol 41 (6) ◽  
pp. 302-317 ◽  
Author(s):  
Peter C. Jacobson ◽  
Timothy K. Cross ◽  
Donna L. Dustin ◽  
Michael Duval

<em>Abstract.</em>—Based on increased concern for habitat degradation, destructive fishing practices, and cumulative impacts across regional ecosystems, marine fish habitat conservation has received unprecedented attention in the past 15 years. Significant progress in science, management, and policy reflect growing acceptance that habitat conservation is an essential ingredient for successful management at the regional or ecosystem levels. Economic realities from the recent global downturn are dampening an immediate infusion of new monies, but the cumulative benefits of these efforts promise to bear fruit. In U.S. waters, our ocean’s health and society’s expectations appear to be nearing their respective tipping points on marine environmental and ecological issues such as declining population vitality and worsening economic yields. This new paradigm calls for a more inclusive approach to fisheries management, including habitat protection and restoration in regional approaches to resource management. Fisheries are likely to be managed in a larger context with other ocean uses and with an eye toward a broader sweep of ecosystem services. The next era of resource management could be based less on traditional fishery management tactics and more on new expectations related to broad ocean management. The result could be healthier oceans yielding greater returns across the larger range of societal needs.


2021 ◽  
Vol 7 ◽  
Author(s):  
Geoffrey G. Shester ◽  
Ben Enticknap ◽  
Brianne Mecum ◽  
Ashley Blacow-Draeger ◽  
Tara Brock ◽  
...  

On January 1, 2020, the United States (U.S.) government implemented new regulations increasing total closed areas to bottom trawl fishing by 363,513 km2, including a net increase of 44,498 km2 in essential fish habitat conservation areas at fishable depths (&lt;1,280 m) along the West Coast continental shelf and upper slope. At the same time, the government reopened certain bottom trawl fishing grounds originally established to rebuild overfished groundfish. In combination with previously existing conservation areas, the result of these regulations is that bottom trawl fishing is now prohibited in 90% (739,491 km2) of ocean waters in the United States West Coast Exclusive Economic Zone, including 32.6% of shelf (&lt;200 m) depth zones and 56.0% of upper slope depth zones (200-1,280 m), with a disproportionate focus on priority habitat features that are proxies for fish habitat, sensitivity to bottom trawling, and biodiversity. The final spatial management measures include 53 new or modified habitat conservation areas closed to bottom trawling in fishable depths (&lt;1,280 m) and a precautionary prohibition on all bottom contact fishing gears at depths greater than 3,500 m. Together the final set of habitat conservation area closures and openings result in an overall increase in coastwide protections for hard, mixed, and soft substrates; seamounts; submarine canyons; and known and predicted coral, sponge, and pennatulid locations. Finer scale analyses indicate net increases or no change in coral and sponge observations inside protected areas across all regions and depth zones, despite some reductions in total area and hard substrate protected in certain regions. Based on historic bottom trawl effort data, we estimate that the opening of previously closed areas restores 24.6% of fishing effort that was displaced by bottom trawl closures implemented prior to 2020. Here we describe the involvement and approach of the conservation organization, Oceana, to protect seafloor habitats off the United States West Coast, which included a coastwide proposal to modify conservation areas, geospatial analyses, grassroots organizing, media stories, and scientific expeditions using remotely operated vehicles. Our comparison of the new versus previous assemblage of habitat conservation areas demonstrates increased overall habitat protection and fishing opportunities throughout depths and bioregions off the United States West Coast.


Author(s):  
Weiming Li ◽  
Xujiao Yao ◽  
Xia Yang

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