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Jellyfish, Forage Fish, and the World’s Major Fisheries Public Deposited

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  • A majority of the world’s largest net-based fisheries target planktivorous forage fish that serve as a critical trophic link between the plankton and upper-level consumers such as large predatory fishes, seabirds, and marine mammals. Because the plankton production that drives forage fish also drives jellyfish production, these taxa often overlap in space, time, and diet in coastal ecosystems. This overlap likely leads to predatory and competitive interactions, as jellyfish are effective predators of fish early life stages and zooplankton. The trophic interplay between these groups is made more complex by the harvest of forage fish, which presumably releases jellyfish from competition and is hypothesized to lead to an increase in their production. To understand the role forage fish and jellyfish play as alternate energy transfer pathways in coastal ecosystems, we explore how functional group productivity is altered in three oceanographically distinct ecosystems when jellyfish are abundant and when fish harvest rates are reduced using ecosystem modeling. We propose that ecosystem-based fishery management approaches to forage fish stocks include the use of jellyfish as an independent, empirical “ecosystem health” indicator.
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  • Robinson, K. L., Ruzicka, J. J., Decker, M. B., Brodeur, R. D., Hernandez, F. J., Quiñones, J., ... & Graham, W. M. (2014). Jellyfish, Forage Fish, and the World’s Major Fisheries. Oceanography, 27(4), 104-115. doi:10.5670/oceanog.2014.90
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  • K.L. Robinson, J.J. Ruzicka, and M.B. Decker were supported by a Lenfest Ocean Program grant (No. 00025535) to W.M. Graham at The University of Southern Mississippi, funded by the Pew Charitable Trusts. J.J. Ruzicka, M.B. Decker, and R.D. Brodeur were also supported by funding from North Pacific Research Board (Project 1405).
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  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2015-03-05T18:30:01Z (GMT) No. of bitstreams: 1 RobinsonKellyHMSCJellyfishForageFish.pdf: 1230100 bytes, checksum: 91a3377571768b98f0c2e8d49904779f (MD5)
  • description.provenance : Made available in DSpace on 2015-03-05T18:30:01Z (GMT). No. of bitstreams: 1 RobinsonKellyHMSCJellyfishForageFish.pdf: 1230100 bytes, checksum: 91a3377571768b98f0c2e8d49904779f (MD5) Previous issue date: 2014-12
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2015-03-05T18:29:49Z No. of bitstreams: 1 RobinsonKellyHMSCJellyfishForageFish.pdf: 1230100 bytes, checksum: 91a3377571768b98f0c2e8d49904779f (MD5)

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