SciELO - Scientific Electronic Library Online

 
vol.76 issue3Holocene distribution of Octodontid rodents in central ChileComposition, structure and energy flux of the meiobenthos off central Chile author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista chilena de historia natural

Print version ISSN 0716-078X

Abstract

CENTELLA, CRISTIAN; JEREZ, VIVIANE; GONZALEZ, URCESINO  and  BITTNER, MAGALIS. Specialization on the host use of Dictyneis asperatus (Blanchard 1851) in a fragment of sclerophyllous-higrophyllous shrublands in Península of Hualpén, Chile. Rev. chil. hist. nat. [online]. 2003, vol.76, n.3, pp.391-400. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2003000300005.

We evaluated trophic relationships between the coleopteran D. asperatus and five potencial hosts plants (Peumus boldus, Lithrea caustica, Cryptocarya alba, Aextoxicon punctatum and Luma apiculata) in a coastal forest of the Hualpén peninsula (36 S). Leaf shape and degree of sclerophylly were examined as possible determinants of host preferences and insect survival. Although D. asperatus was significantly more abundant on P. boldus, there were no significant differences in consumption of leaves of P. boldus, L. caustica and L. apiculata. Adults insects tended to stay under the concave leafs of boldo. Highest and lowest survival was registered in insects fed on P. boldus (72%) and A. punctatum (26%) respectively. The concave leaf of P. boldus represents a possible refuge, and the higher abundance and survival of insects, in spite of the highly sclerophyllous nature of this species, suggests that D. asperatus is an ecological specialist in P. boldus. However, as D. asperatus is common on other plant species at other sites, it can only be considered a local specialist on P. boldus at Hualpén.

Keywords : insect; trophic preferences; specialist; host plant.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License