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Spatial patterns of Anchoveta (Engraulis ringens) eggs and larvae in relation to pCO(2) in the Peruvian upwelling system

TitleSpatial patterns of Anchoveta (Engraulis ringens) eggs and larvae in relation to pCO(2) in the Peruvian upwelling system
Publication TypeJournal Article
Year of Publication2017
AuthorsShen S.G, Thompson A.R, Correa J., Fietzek P., Ayon P., Checkley DM
JournalProceedings of the Royal Society B-Biological Sciences
Date Published2017/05
Type of ArticleArticle
ISBN Number0962-8452
Accession NumberWOS:000405148800015
KeywordsAnchoveta (Engraulis ringens); california current system; carbon-dioxide; co2; ecology; ecosystem; encrasicolus; Environmental Sciences &; Evolutionary Biology; fishes; habitat; larvae; Life Sciences & Biomedicine - Other Topics; ocean acidification; pacific; Peru; sardine sardinops-sagax; spawning; Spawning habitat

Large and productive fisheries occur in regions experiencing or projected to experience ocean acidification. Anchoveta (Engraulis ringens) constitute the world's largest single-species fishery and live in one of the ocean's highest pCO(2) regions. We investigated the relationship of the distribution and abundance of Anchoveta eggs and larvae to natural gradients in pCO(2) in the Peruvian upwelling system. Eggs and larvae, zooplankton, and data on temperature, salinity, chlorophyll a and pCO(2) were collected during a cruise off Peru in 2013. pCO(2) ranged from 167-1392 atm and explained variability in egg presence, an index of spawning habitat. Zooplankton abundance explained variability in the abundance of small larvae. Within the main spawning and larva habitats (6-10 degrees S), eggs were found in cool, low-salinity, and both extremely low (less than 200 mu atm) and high (more than 900 mu atm) pCO(2) waters, and larvae were collected in warmer, higher salinity, and moderate (400-600 atm) pCO(2) waters. Our data support the hypothesis that Anchoveta preferentially spawned at high pCO(2) and these eggs had lower survival. Enhanced understanding of the influence of pCO(2) on Anchoveta spawning and larva mortality, together with pCO(2) measurements, may enable predictions of ocean acidification effects on Anchoveta and inform adaptive fisheries management.

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