Doryteuthis (amerigo) gahi
Several authors found that a single stock of Patagonian squid exists around Falkland Islands and that there are no genetic differences between spawning cohorts (e.g. Carvalho and Pitcher, 1989; Vega et al., 2001; Shaw et al., 2004). However there are two fishing seasons related with two spawning cohorts – autumn-spawning cohort (ASC) and the spring-spawning cohort – that are subject to different oceanographic conditions, show distinct dynamics, are assessed and managed separately (Arkhipkin et al., 2007; FIG, 2013) and were thus here considered. Both national and international fleets operate within the Falkland Interim Conservation and Management Zone (FICZ) and Falkland Islands Outer Conservation Zone (FOCZ) and the existence of a distinc stock out of FICZ is referred by Casey et al. (2013) but further research is needed. Besides, Arkhipkin et al. (2007) consider that the life cycle of Patagonian squid is completed within FICZ. The map below regards an approximate distribution of both spawning stocks on the eastern-southern area of Falkland Islands.
Within FishSource, the term "fishery" is used to indicate each unique combination of a flag country with a fishing gear, operating within a particular management unit, upon a resource. That resource may have a known biological stock structure and/or may be assessed at another level for practical or jurisdictional reasons. A fishery is the finest scale of resolution captured in FishSource profiles, as it is generally the scale at which sustainability can most fairly and practically be evaluated.
Last updated on 16 October 2018
No related FIPs
No related MSC certifications
Agnew, D.J, Baranowski, R., Beddington, J.R., des Clers, S., Nolan, C.P. 1998. Approaches to assessing stocks of Loligo gahi around the Falkland Islands, Fisheries Research 35(3): 155–169 http://www.sciencedirect.com/science/article/pii/S0165783698000836
Arkhipkin, A. I., Middleton, D. A., Barton, J. 2007. Management and Conservation of a Short-Lived Fishery Resource: Loligo gahi around the Falkland Islands, American Fisheries Society Symposium, 10 pp. http://www.fisheriessociety.org/proofs/wfc/arkhipkin.pdf
Carvalho, G.R. and Pitcher, T.J. 1989. Biochemical genetic studies on the Patagonian squid Loligo gahi d’Orbigny. II. Population structure in Falkland waters using isozymes, morphometrics and life history data, Journal of Experimental Marine Biology and Ecology 126: 243-258 http://www.researchgate.net/publication/223846898_Biochemical_genetic_studies_on_the_Patagonian_squid_Loligo_gahi_d’Orbigny.II._Population_structure_in_Falkland_waters_using_isozymes_morphometrics_and_life_historydata
Casey, J., Vanhee, W., Doerner, H. 2013. Review of scientific advice for 2014, Consolidated Advice on Fish Stocks of Interest to the European Union (STECF-13-27), Scientific, Technical and Economic Committee for Fisheries (STECF), European Commission, 578 pp. http://stecf.jrc.ec.europa.eu/documents/43805/648827/2013-11_STECF+13-27+-+Consolidated+Review+of+advice+for+2014_JRC86158.pdf
Falkland Islands Government (FIG), 2013. Fisheries Department Fisheries Statistics, Volume 17 (2003-2012), FIG Fisheries Department, 72 pp http://www.fis.com/falklandfish/Bull17.pdf
Shaw, P. W., Arkhipkin, A. I., Adcock, G. J., Burnett, W. J., Carvalho, G. R., Scherbich, J. N., Villegas, P. A. 2004. DNA markers indicate that distinct spawning cohorts and aggregations of Patagonian squid, Loligo gahi, do not represent genetically discrete subpopulations, Marine Biology144(5): 961-970 http://link.springer.com/article/10.1007%2Fs00227-003-1260-z#page-1
Vega, M. A., Rocha, F. J., Osorio, C. 2001. Morfometría comparada de los estatolitos del calamar Loligo gahi d’Orbigny, 1835 (Cephalopoda: Loliginidae) del norte de Perú e islas Falkland, Investig. mar 29(1): 3-9 http://www.scielo.cl/pdf/imar/v29n1/art01.pdf