{"id":1031,"date":"2020-03-13T11:34:10","date_gmt":"2020-03-13T11:34:10","guid":{"rendered":"https:\/\/ar19.iiasa.ac.at\/?p=1031"},"modified":"2020-03-13T11:43:55","modified_gmt":"2020-03-13T11:43:55","slug":"fisheries-management","status":"publish","type":"post","link":"http:\/\/ar19.iiasa.ac.at\/fisheries-management\/","title":{"rendered":"Science-to-policy insights for fisheries management"},"content":{"rendered":"[et_pb_section fb_built=”1″ _builder_version=”4.2.2″ custom_margin=”||||false|false” custom_padding=”0px||||false|false”][et_pb_row _builder_version=”4.2.2″ custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” locked=”on”][et_pb_column type=”4_4″ _builder_version=”4.2.2″][et_pb_post_title admin_label=”TITLE” _builder_version=”4.2.2″ title_text_align=”left” title_text_color=”#000000″ border_width_bottom=”1px” border_color_bottom=”rgba(0,88,157,0.22)” global_module=”176″ saved_tabs=”all” locked=”off”][\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_3,1_3″ _builder_version=”4.2.2″ custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” locked=”off”][et_pb_column type=”2_3″ _builder_version=”4.2.2″][et_pb_text admin_label=”TEASER – MANUAL TEASER” _builder_version=”4.3.4″ text_font=”|600|||||||” global_module=”307″ saved_tabs=”all”]

Over the years, IIASA research has significantly advanced our understanding of how fishing affects populations and has yielded insights on sustainable fisheries practices. Two recent studies examined the implications of emerging paradigms in fisheries management to safeguard the future of this important food source<\/strong>.<\/p>[\/et_pb_text][et_pb_text admin_label=”BODY” _builder_version=”4.3.4″ text_text_color=”#000000″ hover_enabled=”0″ global_module=”209″ saved_tabs=”all”]

\"\"

\u00a9 Watchares Hansawek | Dreamstime<\/p><\/div>\n

Fish is a major source of animal protein for millions of people. Unsustainable fishing practices are however placing pressure on available fish stocks, which in turn puts food security at risk. To address this, IIASA researchers investigated a harvesting strategy that results in at least 80% of the maximum sustainable yield, sometimes referred to as \u201cpretty good yield\u201d [1]. The range of harvesting options within this type of harvesting strategy is generally broad and thus leaves room to account for additional objectives apart from yield, notably, sustainability. The results highlight the trade-offs that exist between resource acquisition and conservation, but at the same time indicate that \u201cpretty good yield\u201d harvesting strategies can also bring large conservation benefits. Surprisingly, in contrast to conventional wisdom, this study found that harvesting juvenile and adult fish with equal intensity is often a good strategy. The study also revealed factors that can serve as early warnings of impending stock collapse. Namely, while the sustainability of any given fishing option may be difficult to assess in the field, it is often systematically negatively correlated with impacts on biomass and size structure that can more readily be evaluated.<\/p>\n

Another study considered the concept of \u201cbalanced harvest\u201d, which proposes to reduce fishing impact on ecosystems while simultaneously maintaining or even increasing fishery yield [2]. This concept has attracted broad interest but also received criticism. After reviewing the theory and empirical evidence and examining how this strategy relates to the existing legal and policy frameworks, the researchers highlighted unresolved issues from both scientific and management perspectives. They concluded that \u201cbalanced harvest\u201d explicitly bridges fisheries and conservation goals in accordance with international legal and policy frameworks and that it can reduce fishing impacts on ecosystem structures while increasing aggregate yields. This research lays the basis for objective discussions and further research on the role of \u201cbalanced harvest\u201d strategies in contributing to a practical ecosystem approach to fisheries. It also offers the hope that, through more informed fishing practices, the detrimental impacts of fishing can be reduced without any associated long-term reduction in fishing quotas.<\/p>\n[\/et_pb_text][et_pb_text admin_label=”REFERENCES TITLE” _builder_version=”4.3.4″ border_width_bottom=”1px” border_color_bottom=”rgba(0,88,157,0.22)” global_module=”215″ saved_tabs=”all” locked=”off”]

References<\/h3>[\/et_pb_text][et_pb_text admin_label=”REFERENCES TEXT” _builder_version=”4.3.4″ global_module=”468″ saved_tabs=”all”]

[1] Lundstr\u00f6m N, Loeuille N, Meng X, Bodin M, & Br\u00e4nnstr\u00f6m \u00c5 (2019). Meeting Yield and Conservation Objectives by Harvesting Both Juveniles and Adults<\/a>. The American Naturalist<\/em> 193 (3): 373-390.<\/p>\n

[2] Zhou S, Kolding J, Garcia SM, Plank MJ, Bundy A, Charles A, Hansen C, Heino M, et al. (2019). Balanced harvest: concept, policies, evidence, and management implications<\/a>. Reviews in Fish Biology and Fisheries<\/em> 29 (3): 711-733.<\/p>[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.2.2″][et_pb_button button_url=”https:\/\/ar19.iiasa.ac.at\/eep\/” button_text=”Evolution and Ecology” _builder_version=”4.3.4″ button_border_color=”rgba(0,88,157,0.22)” button_border_radius=”5px” button_icon_color=”rgba(0,88,157,0.73)” custom_padding=”|||30px|false|false” global_module=”211″ saved_tabs=”all”][\/et_pb_button][et_pb_sidebar orientation=”right” show_border=”off” admin_label=”Random highlights” _builder_version=”4.3.1″ global_module=”213″ saved_tabs=”all” locked=”on”][\/et_pb_sidebar][\/et_pb_column][\/et_pb_row][\/et_pb_section]","protected":false},"excerpt":{"rendered":"Over the years, IIASA research has significantly advanced our understanding of how fishing affects populations and has yielded insights on sustainable fisheries practices. Two recent studies examined the implications of emerging paradigms in fisheries management to safeguard the future of this important food source.","protected":false},"author":6,"featured_media":1019,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"\r\n

[et_pb_section fb_built=\"1\" _builder_version=\"4.2.2\"][et_pb_row _builder_version=\"4.2.2\"][et_pb_column _builder_version=\"4.2.2\" type=\"4_4\"][et_pb_text _builder_version=\"4.2.2\" _dynamic_attributes=\"content\" hover_enabled=\"0\"]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9leGNlcnB0Iiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJ3b3JkcyI6IiIsInJlYWRfbW9yZV9sYWJlbCI6IiJ9fQ==@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/div>\r\n\r\n\r\n\r\n

<\/p>\r\n","_et_gb_content_width":"1080","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1,52],"tags":[],"class_list":["post-1031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-random","category-eep","no-wpautop"],"jetpack_featured_media_url":"https:\/\/ar19.iiasa.ac.at\/wp-content\/uploads\/sites\/5\/2020\/03\/dreamstime_xxl_99115395.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/posts\/1031","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/comments?post=1031"}],"version-history":[{"count":0,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/posts\/1031\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/media\/1019"}],"wp:attachment":[{"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/media?parent=1031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/categories?post=1031"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ar19.iiasa.ac.at\/wp-json\/wp\/v2\/tags?post=1031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}