A review of the global relationship among freshwater fish, autotrophic activity, and regional climate

Reviews in Fish Biology and Fisheries
By: , and 

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Abstract

The relationship between autotrophic activity and freshwater fish populations is an important consideration for ecologists describing trophic structure in aquatic communities, fisheries managers tasked with increasing sustainable fisheries development, and fish farmers seeking to maximize production. Previous studies of the empirical relationships of autotrophic activity and freshwater fish yield have found positive relationships but were limited by small sample sizes, small geographic scopes, and the inability to compare patterns among many types of measurement techniques. Individual studies and reviews have also lacked consistent consideration of regional climate factors which may inform relationships between fisheries and autotrophic activity. We compiled data from over 700 freshwater systems worldwide and used meta-analysis and linear models to develop a comprehensive global synthesis between multiple metrics of autotrophic activity, fisheries, and climate indicators. Our results demonstrate that multiple metrics of fish (i.e., catch per unit effort, yield, and production) increase with autotrophic activity across a variety of fisheries. At the global scale additional variation in this positive relationship can be ascribed to regional climate differences (i.e., temperature and precipitation) across systems. Our results provide a method and proof-of-concept for assessing inland fisheries production at the global scale, where current estimates are highly uncertain, and may therefore inform the continued sustainable use of global inland fishery resources.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A review of the global relationship among freshwater fish, autotrophic activity, and regional climate
Series title Reviews in Fish Biology and Fisheries
DOI 10.1007/s11160-015-9384-z
Volume 25
Issue 2
Year Published 2015
Language English
Publisher Springer
Contributing office(s) Great Lakes Science Center
Description 14 p.
First page 323
Last page 336
Online Only (Y/N) N
Additional Online Files (Y/N) N