ePIC

Age, growth and mortality of the prosobranch Zidona dufresnei (Donovan, 1823) in the Mar del Plata area, SW Atlantic Ocean

Edit Item Edit Item

General Information:

Citation:
Giménez, J. , Brey, T. , Mackensen, A. and Penchaszadeh, P. B. (2004): Age, growth and mortality of the prosobranch Zidona dufresnei (Donovan, 1823) in the Mar del Plata area, SW Atlantic Ocean , Marine Biology, 145 , pp. 707-712 . doi: 10.1007/s00227-004-1364-0
Cite this page as:
DOI:
Official URL:
Contact Email:
Download:

[img]
Preview
PDF
Gimenez04_MarBiol145.pdf

Download (271Kb) | Preview
Cite this document as:
Supplementary Information:

Abstract:

The volutid snail Zidona dufresnei is a benthic top predator in the Mar del Plata (Argentina) shelf area where is was subjected to unregulated commercial exploitation for more than 20 years. So far there is no stock management, and hitherto even the most basic information on population dynamics of this species is missing. Annual formation of internal shell growth bands visible by x-ray was confirmed by the stable oxygen isotope record in the shell carbonate that reflects seasonal oscillations in water temperature. A Gompertz growth function (SL= 208.84 mm, K = 0.211y-1, t0 = 5.496) fitted 142 pairs of size-at-age data (30 shells) best. Maximum individual production amounted to 26.8 g shell-free wet mass (SFWM) at 115 mm shell length. Based on a size-frequency distribution derived from commercial catches, annual mortality rate of Z dufresnei was estimated to be 0.61 (±0.21) y-1.

Further Details:

Imprint
AWI
Policies:
read more
OAI 2.0:
http://epic.awi.de/cgi/oai2
ePIC is powered by:
EPrints 3