Spatially explicit estimates of stock size, structure and biomass of North Atlantic albacore tuna (Thunnus alalunga) in the North Atlantic for the period 1973-2011, compiled from statistics about ICCAT fishery region L2


Autoria(s): Lehodey, Patrick; Senina, Inna; Dragon, Anne-Cécile; Arrizabalaga, Haritz
Cobertura

MEDIAN LATITUDE: 21.508239 * MEDIAN LONGITUDE: -32.034806 * SOUTH-BOUND LATITUDE: 2.500000 * WEST-BOUND LONGITUDE: -97.500000 * NORTH-BOUND LATITUDE: 62.500000 * EAST-BOUND LONGITUDE: 27.500000 * DATE/TIME START: 1973-01-15T00:00:00 * DATE/TIME END: 2011-12-15T00:00:00

Data(s)

29/01/2014

Resumo

The development of the ecosystem approach and models for the management of ocean marine resources requires easy access to standard validated datasets of historical catch data for the main exploited species. They are used to measure the impact of biomass removal by fisheries and to evaluate the models skills, while the use of standard dataset facilitates models inter-comparison. North Atlantic albacore tuna is exploited all year round by longline and in summer and autumn by surface fisheries and fishery statistics compiled by the International Commission for the Conservation of Atlantic Tunas (ICCAT). Catch and effort with geographical coordinates at monthly spatial resolution of 1° or 5° squares were extracted for this species with a careful definition of fisheries and data screening. In total, thirteen fisheries were defined for the period 1956-2010, with fishing gears longline, troll, mid-water trawl and bait fishing. However, the spatialized catch effort data available in ICCAT database represent a fraction of the entire total catch. Length frequencies of catch were also extracted according to the definition of fisheries above for the period 1956-2010 with a quarterly temporal resolution and spatial resolutions varying from 1°x 1° to 10°x 20°. The resolution used to measure the fish also varies with size-bins of 1, 2 or 5 cm (Fork Length). The screening of data allowed detecting inconsistencies with a relatively large number of samples larger than 150 cm while all studies on the growth of albacore suggest that fish rarely grow up over 130 cm. Therefore, a threshold value of 130 cm has been arbitrarily fixed and all length frequency data above this value removed from the original data set.

Formato

text/tab-separated-values, 53526 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.828226

doi:10.1594/PANGAEA.828226

Idioma(s)

en

Publicador

PANGAEA

Relação

doi:10.1594/PANGAEA.830797

Lehodey, Patrick; Senina, Inna; Dragon, Anne-Cécile; Arrizabalaga, Haritz (2014): Spatially explicit estimates of stock size, structure and biomass of North Atlantic albacore tuna (Thunnus alalunga). Earth System Science Data, 6(2), 317-329, doi:10.5194/essd-6-317-2014

Report of the 2009 ICCAT Albacore Stock Assessment Session (Madrid, Spain, July 13 to 18, 2009) (2010). Collective Volume of Scientific Papers, 65(4), 1113-1253, hdl:10013/epic.42942.d001

Report of the 2013 ICCAT North and South Atlantic Albacore data preparatory meeting (Madrid, Spain - April 22 to 26, 2013) (2013). 66, hdl:10013/epic.42942.d002

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Collecte Localisation Satellites

Palavras-Chave #Basin Scale Analysis, Synthesis and Integration (European Commission Grant Agreement 264 933); Code; DATE/TIME; Determined by number of hooks; EURO-BASIN; Event label; Fishing effort; ICCAT-L2; LATITUDE; LLDEP; LONGITUDE; Longline deployment; Thunnus alalunga
Tipo

Dataset