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

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Title Jellyfish, Forage Fish, and the World’s Major Fisheries
Names Robinson, Kelly L. (creator)
Ruzicka, James J. (creator)
Decker, Mary Beth (creator)
et al. (creator)
Date Issued 2014-12 (iso8601)
Note To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Oceanography Society and can be found at: http://tos.org/oceanography/index.html.
Abstract 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.
Genre Article
Identifier 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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