Meeting Yield and Conservation Objectives by Harvesting Both Juveniles and Adults

15711 10 86360 3 246223 document 86360 ArXiV-version_Lundstrom-etal_2018.pdf application/pdf adb677725dc0f2014eef4d5fc6cc3536 MD5 2432791 2019-02-26 10:38:03 https://pure.iiasa.ac.at/id/eprint/15711/1/ArXiV-version_Lundstrom-etal_2018.pdf 15711 1 1 application/pdf text en public cc_by_nc_4

ArXiV-version_Lundstrom-etal_2018.pdf

accepted 86366 1 244985 document 86366 indexcodes.txt text/x-c 9990a503e59ba0ab1519334bc6fde27f MD5 16579 2019-01-28 14:22:50 https://pure.iiasa.ac.at/id/eprint/15711/2/indexcodes.txt 15711 2 2 text/x-c other Generate index codes conversion from text to indexcodes en public

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/86360 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/86360 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/86360 archive 353 disk0/00/01/57/11 2019-01-28 14:16:24 2021-08-27 17:31:20 2019-01-28 14:16:24 article show Lundström N. Loeuille N. Meng X. Bodin M. Brännström Å. 8085 Meeting Yield and Conservation Objectives by Harvesting Both Juveniles and Adults pub prog_eep fisheries management, maximum sustainable yield, pretty good yield, Pareto front, resilience, size structure Sustainable yields that are at least 80% of the maximum sustainable yield are sometimes referred to as “pretty good yields” (PGY). The range of PGY harvesting strategies is generally broad and thus leaves room to account for additional objectives besides high yield. Here, we analyze stage-dependent harvesting strategies that realize PGY with conservation as a second objective. We show that (1) PGY harvesting strategies can give large conservation benefits and (2) equal harvesting rates of juveniles and adults is often a good strategy. These conclusions are based on trade-off curves between yield and four measures of conservation that form in two established population models, one age-structured model and one stage-structured model, when considering different harvesting rates of juveniles and adults. These conclusions hold for a broad range of parameter settings, although our investigation of robustness also reveals that (3) predictions of the age-structured model are more sensitive to variations in parameter values than those of the stage-structured model. Finally, we find that (4) measures of stability that are often quite difficult to assess in the field (e.g., basic reproduction ratio and resilience) are systematically negatively correlated with impacts on biomass and size structure, so that these later quantities can provide integrative signals to detect possible collapses. 2019-03 published University of Chicago Press 10.1086/701631 39 public The American Naturalist 193 3 373-390 TRUE 0003-0147 FALSE no info:eu-repo/semantics/article