SciELO - Scientific Electronic Library Online

 
vol.37 issue1LIMNOLOGICAL STUDIES IN LAKES AND PONDS OF TORRES DEL PAINE NATIONAL PARK (51° S, CHILE)TEMPERATURE VARIATIONS IN PUNTA ARENAS (CHILE) DURING THE LAST 120 YEARS author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Anales del Instituto de la Patagonia

On-line version ISSN 0718-686X

Abstract

ANDRADE, Claudia; MONTIEL, Américo  and  QUIROGA, Eduardo. ESTIMATION OF SECONDARY PRODUCTION AND PRODUCTIVITY FROM AN INTERTIDAL POPULATION OF TROPHON GEVERSIANUS, (LAREDO BAY, STRAITS OF MAGELLAN). Anales Instituto Patagonia (Chile) [online]. 2009, vol.37, n.1, pp.73-84. ISSN 0718-686X.  http://dx.doi.org/10.4067/S0718-686X2009000100007.

Alíhough íhe carnivorous gasíropod Trophon geversianus (Pallas, 1774) is one oí íhe commercially harvesíed beníhic species in íhe Magellan región, no informaíion is available on iís biological producíiviíy. Secondary producíion and producíiviíy (P/B raíio) from an iníeríidal populaíion of T. geversianus was esíimaíed using íhe neural neíworks model. Seasonal sampling was carried ouí in Bahía Laredo, Esírecrío de Magallanes beíween Augusí 2007 and April 2008. Individual lengíhs of T. geversianus ranged from 12.4 ío 55.4 mm (28.4 ± 7.4). The populaíion showed a unimodal size disíribuíion. The seasonal average densiíy ranged from 0.23 ind m2 ío 0.97 ind m2, while average biomass varied beíween 0.041 g AFDW m2 and 0.194 g AFDW m2. Mean secondary producíion was esíimaíed ío range beíween 0.03 and 0.16 g AFDW m2 yr1 and esíimaíed producíiviíy was 0.7 year1. The P/B raíio was significaníly correlaíed wiíh body size of T. geversianus. The esíimaíed producíiviíy valúes of T. geversianus are consisíení wiíh íhose reporíed in íhe liíeraíure for oíhers molluscan species from Aníarcíic, Subaníarcíic and Chilean waíers.

Keywords : Gastropoda; Muricidae; P/B ratio.

        · 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