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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Increasing jellyfish populations: Trends in Large Marine Ecosystems
Hydrobiologia, Volume 690, No. 1, Year 2012
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Description
Although there are various indications and claims that jellyfish (i. e., scyphozoans, cubozoans, most hydrozoans, ctenophores, and salps) have been increasing at a global scale in recent decades, a rigorous demonstration of this has never been presented. Because this is mainly due to scarcity of quantitative time series of jellyfish abundance from scientific surveys, we attempt to complement such data with non-conventional information from other sources. This was accomplished using the analytical framework of fuzzy logic, which allows the combination of information with variable degrees of cardinality, reliability, and temporal and spatial coverage. Data were aggregated and analyzed at the scale of Large Marine Ecosystem (LME). Of the 66 LMEs defined thus far that cover the world's coastal waters and seas, trends of jellyfish abundance after 1950 (increasing, decreasing, or stable/variable) were identified for 45, with variable degrees of confidence. Of those 45 LMEs, the majority (28 or 62%) showed increasing trends. These changes are discussed in the context of possible sources of bias and uncertainty, along with previously proposed hypotheses to explain increases in jellyfish. © 2012 The Author(s).
Authors & Co-Authors
Brotz, Lucas
Canada, Vancouver
The University of British Columbia
Cheung, William W.L.
United Kingdom, Norwich
University of East Anglia
Canada, Vancouver
The University of British Columbia
Kleisner, Kristin M.
Canada, Vancouver
The University of British Columbia
Pakhomov, Evgeny A.
Canada, Vancouver
The University of British Columbia
Pauly, Daniel
Canada, Vancouver
The University of British Columbia
Statistics
Citations: 343
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1007/s10750-012-1039-7
ISSN:
15735117
Research Areas
Health System And Policy
Study Design
Cross Sectional Study
Study Approach
Quantitative