SciELO - Scientific Electronic Library Online

vol.46 número3Macroalgas submareales de los canales interiores del Parque Nacional Bernardo O’Higgins (~49°- 51° S), región de Magallanes, ChileNoticia inquietante: ausencia del abejorro Bombus (Fervidobombus) dahlbomii guérin-méneville (Hymenoptera: Apidae) en la primavera 2017-verano 2018 de la ciudad de Punta Arenas (53 o 10’S; 70 o 55’O), Magallanes, Chile meridional, con antecedentes históricos de la especie índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google


Anales del Instituto de la Patagonia

versión On-line ISSN 0718-686X


PINOCHET, Ramona; SOTO, Juan Carlos; PALACIOS, Mauricio  y  OYARZUN, Sylvia. Dietary selection of Tegula atra (Lesson, 1830) as an approximation of preference over different species of macroalgae from south of Chile. Anales Instituto Patagonia (Chile) [online]. 2018, vol.46, n.3, pp.51-60. ISSN 0718-686X.

Among the causes that determine food preference are the properties of diets, consumer or consumer- prey interactions. Due to the challenge of integrating all these causes to assess food preference, it was chosen a measuring the food selection the selection of a particular food type. The food selection was measured thoughout the consumption rate, assuming that those food that satisfy the body’s physiological requirements more quickly, will be most consume. If there is selection for a particular type of food, consumption rate on that food will be different if it is presented as a mono- or mixed- diet. In order to evaluate dietary preference in the black snail Tegula atra, manipulative experiments of selectivity were carried out with individuals from two localities in Southern Chile: Bahía Metri (Puerto Montt) and Punta Santa Ana (strait of Magellan). The specimens were exposed to monospecific diet of macroalgae and macroalgae mixed-diet. The results of consumption rate showed the capacity of this organism to feed on varied species of macroalgae, but also certain selective behaviours, mainly due to the greater consumption of the macroalgae, Macrocystis pyrifera. These results coincide with the frequency of co-occurrence of both species on their natural environment.

Palabras clave : herbivory; trophic relationships; food selection; consumption rate.

        · resumen en Español     · texto en Español     · Español ( pdf )