Intraguild predation of Atlantic mackerel on early life stages of anchovy and sardine

Event Abstract Back to Event Intraguild predation of Atlantic mackerel on early life stages of anchovy and sardine Eneko Bachiller1*, Elsa Cuende1, Paula Alvarez1, Almudena Fontán1, Naiara Rodriguez-Ezpeleta1 and Unai Cotano1 1 AZTI Foundation, Marine Ecosystem Functioning Area, Spain Intraguild predation between small pelagic fish as regulation mechanism of early life stage survival (e.g. top-down control) may have a significant effect on inter-annual variations in fish abundance and recruitment variability. For instance, although traditionally linked to physical (e.g. transport, retention) processes, survival of anchovy early life stages in the main spawning grounds (i.e. French continental shelf in spring) of the Bay of Biscay is partly regulated by small pelagic fish predation. Visual identification of adult fish stomach contents may underestimate early life stage mortality due to predation; indeed, preliminary genetic based prey identification suggests new potential predators such as mackerel larvae potentially feeding on anchovy and sardine eggs in the shelf break, where they could have been transported by advection. However, the role of different life stages of mackerel as potential predators and the relevance of their co-occurrence in the anchovy and sardine main spawning and nursery areas for early life stages survival and recruitment, remain unclear. This study combines both microscope and genetic based prey identification to provide more accurate estimates of anchovy and sardine early life stage mortality of due to predation by mackerel larvae and adults. In addition, egg and larvae transport is considered as a potential factor that may regulate the effects of the intraguild predation, increasing or decreasing the prey-predator encounter rates. This study provides new insights into the trophic interactions in the Bay of Biscay, which is critical to inform advanced multispecies ecosystem models. References Albaina, A., Irigoien, X., Aldalur, U., Cotano, U., Santos, M., Boyra, G., et al. (2015). A real-time PCR assay to estimate invertebrate and fish predation on anchovy eggs in the Bay of Biscay. Prog. Oceanogr. 131, 82–99. Bachiller, E., Cotano, U., Ibaibarriaga, L., Santos, M., and Irigoien, X. (2015). Intraguild predation between small pelagic fish in the Bay of Biscay: impact on anchovy (Engraulis encrasicolus L.) egg mortality. Mar. Biol. 162, 1351–1369. doi:DOI 10.1007/s00227-015-2674-0. Irigoien, X., Fiksen, Ø., Cotano, U., Uriarte, A., Alvarez, P., Arrizabalaga, H., et al. (2007). Could Biscay Bay Anchovy recruit through a spatial loophole? Prog. Oceanogr. 74, 132–148. doi:10.1016/j.pocean.2007.04.011. Keywords: Scomber scombrus, intraguild predation, Ichtyoplankton, Spatial overlap, Stomach contents, qPCR, metabarcoding Conference: XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016. Presentation Type: Oral Presentation Topic: 3. OCEANOGRAPHY, MODELLING AND ECOSYSTEM DYNAMICS Citation: Bachiller E, Cuende E, Alvarez P, Fontán A, Rodriguez-Ezpeleta N and Cotano U (2016). Intraguild predation of Atlantic mackerel on early life stages of anchovy and sardine. Front. Mar. Sci. Conference Abstract: XIX Iberian Symposium on Marine Biology Studies. doi: 10.3389/conf.FMARS.2016.05.00061 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 28 Apr 2016; Published Online: 02 Sep 2016. * Correspondence: Dr. Eneko Bachiller, AZTI Foundation, Marine Ecosystem Functioning Area, Pasaia, Gipuzkoa, 20110, Spain, ebachiller@azti.es Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Eneko Bachiller Elsa Cuende Paula Alvarez Almudena Fontán Naiara Rodriguez-Ezpeleta Unai Cotano Google Eneko Bachiller Elsa Cuende Paula Alvarez Almudena Fontán Naiara Rodriguez-Ezpeleta Unai Cotano Google Scholar Eneko Bachiller Elsa Cuende Paula Alvarez Almudena Fontán Naiara Rodriguez-Ezpeleta Unai Cotano PubMed Eneko Bachiller Elsa Cuende Paula Alvarez Almudena Fontán Naiara Rodriguez-Ezpeleta Unai Cotano Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Topic: Marine and fisheries research
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences