Movatterモバイル変換

[0]ホーム
URL:

Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
Thehttps:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

NIH NLM Logo
Log inShow account info
Access keysNCBI HomepageMyNCBI HomepageMain ContentMain Navigation
pubmed logo
Advanced Clipboard
User Guide

Full text links

Atypon full text link Atypon Free PMC article
Full text links

Actions

Share

.2017 Jan 24;114(4):717-721.
doi: 10.1073/pnas.1612722114. Epub 2016 Dec 27.

High fishery catches through trophic cascades in China

Affiliations

High fishery catches through trophic cascades in China

Cody S Szuwalski et al. Proc Natl Acad Sci U S A..

Abstract

Indiscriminate and intense fishing has occurred in many marine ecosystems around the world. Although this practice may have negative effects on biodiversity and populations of individual species, it may also increase total fishery productivity by removing predatory fish. We examine the potential for this phenomenon to explain the high reported wild catches in the East China Sea-one of the most productive ecosystems in the world that has also had its catch reporting accuracy and fishery management questioned. We show that reported catches can be approximated using an ecosystem model that allows for trophic cascades (i.e., the depletion of predators and consequent increases in production of their prey). This would be the world's largest known example of marine ecosystem "engineering" and suggests that trade-offs between conservation and food production exist. We project that fishing practices could be modified to increase total catches, revenue, and biomass in the East China Sea, but single-species management would decrease both catches and revenue by reversing the trophic cascades. Our results suggest that implementing single-species management in currently lightly managed and highly exploited multispecies fisheries (which account for a large fraction of global fish catch) may result in decreases in global catch. Efforts to reform management in these fisheries will need to consider system wide impacts of changes in management, rather than focusing only on individual species.

Keywords: China; ecosystem management; fisheries; food security; trophic cascades.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Fig. 1.
Fig. 1.
East China Sea model fitted to observed data for 11 species and 1 “other species” group. Size of plot roughly represents the proportion of the total catch a species represents (true proportions of the total catch that each species/group represented in 2014 are indicated after the group name).
Fig. 2.
Fig. 2.
Trophic cascades resulting from different management strategies implemented in the size-spectrum model of the East China Sea. Changes in abundance are relative to unfished levels, indicated by the dotted black line at a relative abundance of “1”;x axis is the weight in grams of fish within the model.
Fig. 3.
Fig. 3.
Ecosystem-wide catch (x axis), biomass (circle size), and value (y axis) by management strategies. Bar plot at theTop displays the selectivity by strategy, color-coded to match the circles representing scenarios within the main figure. The lines in the selectivity bars represent the individual selectivities for each species and can be seen in tabular format inSI Appendix, Fig. S9.
Fig. 4.
Fig. 4.
Proportion of virgin biomass levels predicted by the size-spectrum model for species under different management strategies. Values greater than 1 indicate the biomass of the species is greater than the virgin levels as a result of predatory release. “Max weight” is the maximum weight in kilograms of an individual from a given species or group.
See this image and copyright information in PMC

Comment in

  • Unplanned ecological engineering.
    Andersen KH, Gislason H.Andersen KH, et al.Proc Natl Acad Sci U S A. 2017 Jan 24;114(4):634-635. doi: 10.1073/pnas.1620158114. Epub 2017 Jan 12.Proc Natl Acad Sci U S A. 2017.PMID:28082724Free PMC article.No abstract available.

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Food and Agriculture Organization of the United Nations 2016 The State of World Fisheries and Aquaculture (Food and Agriculture Organization of the United Nations, Rome). Available atwww.fao.org/fishery/sofia/en. Accessed June 22, 2016.
    1. Hilborn R, Ovando D. Reflections on the success of traditional fisheries management. ICES J Mar Sci. 2014;71(5):1040–1046.
    1. Matsuda H, Abrams PA. Maximal yields from multispecies fisheries systems: Rules for systems with multiple trophic levels. Ecol Appl. 2006;16(1):225–237. - PubMed
    1. Bax NJ. A comparison of fish biomass flow to fish, fisheries, and mammals in six marine ecosystems. ICES Mar Sci Symp. 1991;193:217–224.
    1. Trebilco R, Baum JK, Salomon AK, Dulvy NK. Ecosystem ecology: Size-based constraints on the pyramids of life. Trends Ecol Evol. 2013;28(7):423–431. - PubMed

Publication types

MeSH terms

LinkOut - more resources

Full text links
Atypon full text link Atypon Free PMC article
Cite
Send To

NCBI Literature Resources

MeSHPMCBookshelfDisclaimer

The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Unauthorized use of these marks is strictly prohibited.

[8]ページ先頭
©2009-2025 Movatter.jp