Portuguese commercial fisheries of swordfish, Xiphias gladius
-
1
Escola Superior de Turismo e Tecnologia do Mar, Portugal
Swordfish has an important role in Portuguese fisheries. Portuguese commercial swordfish landings were analyzed from 1986 to 2012. Commercial landings of five incidental catches of pelagic sharks (Alopias superciliosus, Alopias vulpinus, Isurus oxyrinchus, Prionace glauca and Sphryna zygaena) were also evaluated for the same period. A total of 3.653 landings of swordfish (12.625 t) were observed in 62 ports. Annual landings for the fishery generally decreased over time, with a corresponding increase in price per kilogram. The most fished shark was blue shark with 12.715 t in 48 ports. It was followed by shortfin mako, thresher, smooth hammerhead and bigeye thresher (with 5.113 t, 672 t, 19 t and 0,45 t, respectively). The lowest landings of swordfish were observed in the first semester of each years while catch levels of blue sharks were high. Shortfin mako catches raised only since 2005. The remaining species studies always displayed lower landings, suggesting that most of them are bycaught.
Keywords:
swordfish,
landings,
Fisheries,
bycatch,
Management
Conference:
IMMR | International Meeting on Marine Research 2014, Peniche, Portugal, 10 Jul - 11 Jul, 2014.
Presentation Type:
Poster Presentation
Topic:
FISHERIES AND MANAGEMENT
Citation:
Nunes
AR,
Mendes
SL and
Correia
JP
(2014). Portuguese commercial fisheries of swordfish, Xiphias gladius.
Front. Mar. Sci.
Conference Abstract:
IMMR | International Meeting on Marine Research 2014.
doi: 10.3389/conf.fmars.2014.02.00133
Copyright:
The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers.
They are made available through the Frontiers publishing platform as a service to conference organizers and presenters.
The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated.
Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed.
For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions.
Received:
10 May 2014;
Published Online:
18 Jul 2014.
*
Correspondence:
Mr. André R Nunes, Escola Superior de Turismo e Tecnologia do Mar, Peniche, Portugal, andreroxoo@gmail.com