title: Ontogenetic variability in the feeding behavior of a marine amphipod in response to ocean acidification.
abstract: Global stressors like ocean acidification (OA) are expected to influence the quality or palatability of primary producers like algae. Such changes can trigger a response on algal consumers' feeding strategies, and this response may not necessarily be the same for the consumers during the ontogeny. We used a mesocosm's system to expose algae to current and projected OA conditions (390 and 1000ppm, respectively) and then compared the feeding behavior and absorption efficiency of juvenile and adult stages of the amphipod Orchestoidea tuberculata. Specifically, we measured consumption rates (with and without a choice) and absorption efficiency on algae exposed and not exposed to OA. Our results show that OA affect the amphipod's consumption and feeding preferences, and that these effects were related with the analyzed ontogenetic stage (juveniles versus adults). These results support the existence of an ontogenetic change in the response of this species and others similar marine invertebrates to OA, which highlight the need to incorporate different life stages in the study of OA or others global stressors.
authors.affiliation: Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andrés Bello, Santiago, Chile; Center for the Study of Multiple-drivers on Marine Socio-Ecological System (MUSELS), Universidad de Concepción, Concepción, Chile; Centro de Investigación e Innovación para el Cambio Climático (CIICC), Facultad de Ciencias, Universidad Santo Tomas, Ejército 146, Santiago, Chile.
authors.forename: Samanta
authors.initials: S
authors.lastname: Benítez
authors.affiliation: Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andrés Bello, Santiago, Chile; Center for the Study of Multiple-drivers on Marine Socio-Ecological System (MUSELS), Universidad de Concepción, Concepción, Chile. Electronic address: cristian.duarte@unab.cl.
authors.forename: Cristian
authors.initials: C
authors.lastname: Duarte
authors.affiliation: Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.
authors.forename: Jorge
authors.initials: J
authors.lastname: López
authors.affiliation: Laboratorio de Ecología y Conducta de la Ontogenia Temprana (LECOT), Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Avenida Ossandón 877, Coquimbo, Chile.
authors.forename: Patricio H
authors.initials: PH
authors.lastname: Manríquez
authors.affiliation: Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile.
authors.forename: Jorge M
authors.initials: JM
authors.lastname: Navarro
authors.affiliation: Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.
authors.forename: Cesar C
authors.initials: CC
authors.lastname: Bonta
authors.affiliation: Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Coyhaique, Chile.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Torres
authors.affiliation: Department of Biology, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
authors.forename: Pedro A
authors.initials: PA
authors.lastname: Quijón
mesh_terms: D033304:Amphipoda / Q000502:physiology*; D000818:Animals; D059001:Aquatic Organisms; D018533:Biomass; D002245:Carbon Dioxide / Q000737:chemistry; D017753:Ecosystem; D005247:Feeding Behavior; D006863:Hydrogen-Ion Concentration; D009792:Oceans and Seas; D012623:Seawater / Q000737:chemistry*; D012624:Seaweed
chemical_list: D002245:Carbon Dioxide
keywords: Amphipods; Feeding behavior; Ocean acidification; Ontogeny