Utilize este identificador para referenciar este registo: https://hdl.handle.net/10316/98661
Título: Consumption, growth and survival of the endemic stream shredder Limnephilus atlanticus (Trichoptera, Limnephilidae) fed with distinct leaf species
Autor: Balibrea, Ana
Ferreira, Verónica 
Goncalves, Vitor
Raposeiro, Pedro Miguel
Palavras-chave: Allometric relationships; Invertebrate ecology; Island systems; Leaf quality; Azores archipelago
Data: 2017
Título da revista, periódico, livro ou evento: Limnologica
Volume: 64
Resumo: Oceanic freshwater communities tend to be species poor but rich in endemism due to their physical isolation. The ecology of endemic freshwater species is, however, poorly known. This study assessed allometric relationships, feeding preferences, growth and survival of larvae of the endemic stream insect Limnephilus atlanticus (Trichoptera, Limnephilidae) exposed to four leaf species differing in their physical and chemical characteristics (Ilex perado, Morella faya, Alnus glutinosa and Clethra arborea), in laboratory trials. All regression models used to estimate L. atlanticus dry mass from body and case dimensions and wet mass were significant, but wet mass and body length were the best predictors. Limnephilus atlanticus consumed all the four leaf species offered, but when given a choice, shredders significantly preferred A. glutinosa over the other three leaf species. Relative larval growth rate was significantly higher when L. atlanticus fed on A. glutinosa and I. perado leaves in comparison with the other leaf species. Survival of 95% was found when individuals fed on A. glutinosa leaves while it decreased to 75% when they fed on the other leaf species. Our results suggest that L. atlanticus can be an active shredder and that it exhibits the same basic patterns of food exploitation as its continental counterparts. The lack of an effect of shredders on litter decomposition in Azorean streams revealed by previous studies may thus be due to low densities or to a preference for food resources other than the low quality native litter species.
URI: https://hdl.handle.net/10316/98661
DOI: 10.1016/j.1imno.2017.04.002
Direitos: openAccess
Aparece nas coleções:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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