Remotely sensed mesoscale oceanography and the distribution of Illex argentinus in the South Atlantic
In this study, we consider the influence of mesoscale
oceanographic processes around the Falkland Islands
(Islas Malvinas) in the South-west Atlantic, during
the period in which the commercial squid fishery for
Illex argentinus operates. Spatially referenced fishery
data and satellite-derived advanced very high resolution
radiometry (AVHRR) sea surface temperature
(SST) data were examined using geographic information
system (GIS) techniques. The distribution and
relative abundance of I. argentinus in the Falkland
Islands fishery was examined for the period 1989±96.
Three consistent areas of high abundance were
observed to the north-east (shelf-break region) and
north-west (shelf region) of the islands, and close to
the northern coast of East Falkland. Areas of high sea
surface temperature gradients (thermal gradients)
extracted from remotely sensed satellite images were
used as an indicator of mesoscale oceanographic
activity and compared with the location of the fishery.
I. argentinus were found to be associated with areas of
thermal gradients, commonly seen at the interface of
Falkland Current and Patagonian shelf waters. The
techniques used in this analysis allow the overlay and
analysis of physical oceanographic and fishery data
with potential applications in fisheries management
and operational fisheries oceanography.
Authors: Waluda, C M, Rodhouse, P G, Trathan, P N, Pierce, G J
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.