INVESTIGADORES
CASAUX Ricardo Jorge
artículos
Título:
Effect of a shore-based sampling programme on Notothenia coriiceps populations
Autor/es:
CASAUX RICARDO; BARRERA-ORO ESTEBAN
Revista:
ANTARCTIC SCIENCE
Referencias:
Año: 2002 vol. 14 p. 221 - 224
ISSN:
0954-1020
Resumen:
Abstract
The effect of an
intensive sampling programme on an inshore population of Notothenia
coriiceps was studied at Potter Cove, South Shetland Islands, by comparing
catch data taken in successive summers of 1992/93 to 1994/95 at one specific
zone (site 1) with those taken in the 1994/95 summer at two close but not
previously sampled zones (sites 2 and 3). The fish were caught with trammel
nets under similar sampling conditions (depth, net measurements, bottom type).
In site 1, a decline in length (TL) of the fish was observed throughout the
whole period. The fish from sites 2 (x=32.4 cm) and 3 (x=31.8 cm) exhibited no
significant differences in mean length. They were larger (P=0.07) than
those from site 1 caught in the summers of 1994/95 (x=28.8 cm) and 1993/94 (x=30.2 cm), but were similar
in size to those sampled in the summer of 1992/93 (x=31.7 cm), just when the
sampling programme started in site 1. Although alternative hypotheses to
explain the results are discussed (e.g. random error, strong recruitment), it
is suggested that the size variations of the fish sampled at site 1 are due to
intensive sampling effort carried out throughout this study at that specific
zone in Potter Cove.