title: Increased parasitism of limpets by a trematode metacercaria in fisheries management areas of central Chile: effects on host growth and reproduction : management areas and parasitism.
abstract: The rapid increase in body size and abundance of most species inside Management and Exploitations Areas for Benthic Resources (MEABRs) has led to the proposal of these areas as a good complement for achieving the conservation objectives of Marine Protected Areas (MPAs). However, when evaluating MEABRs and MPAs as conservation and/or management tools, their impact upon parasite populations has rarely been considered, despite the fact that epidemiological theory suggests an increased susceptibility to parasitism under high population abundance. We evaluated the effects of MEABRs on the parasite abundance of Proctoeces lintoni and its impact on the growth of the host limpet Fissurella crassa in central Chile. Parasitic magnitude was higher inside MEABRs than in Open-Access Areas, and parasitized limpets showed a greater shell length, muscular foot biomass, and gonadosomatic index compared to non-parasitized limpets of the same age. Our results suggest that the life cycle of P. lintoni and, consequently, its trophic links have been strengthened inside MEABRs. The increased growth rate could reduce the time required to reach the minimum catch size and increase the reproductive and muscular output of the host population. Thus, parasitism should be considered in the conservation and management of economically important mollusk hosts.
authors.affiliation: Escuela de Pedagogía en Biología y Ciencias, Facultad de Ciencias de la Educación, Universidad Central de Chile, Santa Isabel 1278, 6° piso, Santiago, Chile, maldanap@ucentral.cl.
authors.forename: Marcela
authors.initials: M
authors.lastname: Aldana
authors.forename: José M
authors.initials: JM
authors.lastname: Pulgar
authors.forename: Nathalie
authors.initials: N
authors.lastname: Orellana
authors.forename: F
authors.initials: F
authors.lastname: Patricio Ojeda
authors.forename: M Roberto
authors.initials: MR
authors.lastname: García-Huidobro
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002677:Chile; D003247:Conservation of Natural Resources / Q000379:methods*; D017753:Ecosystem; D005398:Fisheries / Q000379:methods* / Q000592:standards; D005399:Fishes / Q000469:parasitology*; D049851:Gastropoda / Q000469:parasitology*; D006790:Host-Parasite Interactions; D014200:Trematoda / Q000469:parasitology* / Q000472:pathogenicity; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary