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dc.creatorEspinoza Mendiola, Mario
dc.creatorWehrtmann, Ingo S.
dc.date2007-10-01
dc.date.accessioned2016-05-03T15:27:53Z
dc.date.available2016-05-03T15:27:53Z
dc.identifierhttp://revistas.ucr.ac.cr/index.php/rbt/article/view/5772
dc.identifier10.15517/rbt.v56i4.5772
dc.identifier.urihttp://hdl.handle.net/10669/26243
dc.descriptionOur knowledge of deepwater ecosystems along the Pacific of Central America is extremely limited. We analyzed the diet composition of 200 adult specimens of Lophiodes spilurus ranging in size from 7.8 to 17.8 cm total length (TL). Samples were obtained from deep bottom trawls (depth: 105-238 m) along the central Pacific of Costa Rica. We calculated the percentage of number (% N), weight (% W), and occurrence (% O) of each food item encountered in the stomachs; based on this information, the Index of Relative Importance (IR) was calculated. Moreover, we estimated diet overlap for three different size classes ( < 10.1, 10.1-15.0 and > 15.1 cm TL). The results revealed exclusively two groups of benthic prey items: crustaceans (30%) and teleost fish (70%) in their diet. The most frequent preys were pandalid shrimps Plesionika trispinus (% O = 17) and the fathom mora Physiculus rastrelliger (% O = 12). The greatest diversity and frequency of abundance of food items was observed in intermediate-sized individuals (10.1-15.0 cm TL). Small-sized L. spilurus ( < 10.1 cm TL) fed mainly on teleost fish, while larger ( > 15.0 cm TL) preyed on large-sized stomatopods and teleost fish. There was a clear diet overlap between small and intermediate-sized L. spilurus (p < 0.05). However, differences in diet-overlap were not detected in small and large-sized individuals or intermediate and large-sized specimens (p > 0.05). Our results suggest that L. spilurus feeds exclusively on crustaceans (Decapoda and Stomatopoda) and benthic teleost fish along the Pacific of Costa Rica. While small and large-sized individuals showed a more pronounced selectivity for certain prey items, the high diversity of benthic prey items observed in intermediatesized specimens suggest a more opportunistic foraging behavior.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherUniversidad de Costa Ricaen-US
dc.rightsCopyright (c) 2014 International Journal of Tropical Biology and Conservationen
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 56 (4) December 2008es-ES
dc.source2215-2075
dc.source0034-7744
dc.source10.15517/rbt.v56i4
dc.titleStomach content analyses of the threadfin anglerfish Lophiodes spilurus (Lophiiformes: Lophiidae) associated with deepwater shrimp fisheries from the central Pacific of Costa Ricaen
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageCRCen


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