42 SPC Beche-de-mer Information Bulletin #39 – March 2019
Illegal fishing of the sea cucumber Isostichopus fuscus is rampant in the Gulf of California, Mexico
Luis E. Calderon-Aguilera1
Abstract The brown sea cucumber, Isostichopus fuscus, has been harvested in the Mexican Pacific since 1988 but the fishery was closed in 1994 due to overfishing, and the species was listed as at-risk in the Official Mexican Standard (NOM-059). In 2000, its status changed to under special protection and some permits to fish for this species were granted. However, illegal, unreported and unregulated fishing has always taken place in the Gulf of California where I. fuscus is more abundant. This work shows that the mean density of this sea cucumber has decreased from 15 ind. 100 m-2 in 2007 to 2.8 in 2016, a reduction of more than five fold, and that the reductions are largely due to illegal fishing. Official sources report that between 2013 and 2018, 1,024,813 individual sea cucumbers were confiscated in the region, so the illegal catch is certainly much larger. It is essential to increase surveillance in the field and law enforcement at borders, otherwise this spe- cies will soon become commercially extinct.
Keywords: poaching, unreported, illegal fishing, Isostichopus fuscus, protected area, Mexico, Gulf of California
Introduction and is included in the Convention on the Interna- tional Trade in Endangered Species Appendix III4 One of Mexico’s most valuable marine resources is as per the Government of Ecuador’s request.5 the brown sea cucumber Isostichopus fuscus Ludwig, 1875. This precious commodity is exported to Asia Methods where there is a huge demand for sea cucumbers,2 and species such as I. fuscus can fetch up to USD Fieldwork 1,030 kg-1 (Purcell et al. 2014). In 2005, at the request of Mexico’s Secretariat of The sea cucumber fishery in the Gulf of California is Environment and Natural Resources (Secretaría del a textbook example of a boom-and-bust cycle: from Medio Ambiente y Recursos Naturales, SEMAR- non-existent until 1988 when the fishery began NAT), we began conducting surveys along the east (Singh-Cabanillas and Vélez-Barajas 1996), to a coast of Baja California to estimate the density of peak in 1991, followed by a sharp decrease in 1993 Isostichopus fuscus. Night surveys were conducted (Fig. 1). In 1994, I. fuscus was listed in the Official (during the day the sea cucumber hides among Mexican Standard (NOM) 059 as being a species at- crevices, holes and rocks) using semi-autonomous risk (SEMARNAP 1994) and the fishery was totally diving gear, known as ‘hooka’, which consists of a banned until 2000 when its status changed to a spe- compressor that supplies air through a hose to the cies under special protection, and some permits to diver. Despite the fact that at the time no permits harvest it were granted. The use of I. fuscus is regu- were being issued, we frequently observed poach- lated by the General Wildlife Law (Ley General de ers boiling sea cucumbers in the islands. Vida Silvestre) and its regulations, and can only be harvested if ad hoc technical studies show that the Sampling consisted of band transects 2 m wide by population will not be affected (SEMARNAT 2010). 25 m long, so that a surface area of 50 m2 was cov- Moreover, it is listed as an endangered species by ered by each transect and two transects were made the International Union for Conservation of Nature3 at each depth. If the site was more than 20 m deep,
1 Professor Department of Ecology, Ensenada Center for Scientific Research and Higher Education, Mexico. (Centro de Investi- gación Científica y de Educación Superior de Ensenada, or CICESE). Email: [email protected] 2 http://www.eluniversal.com.mx/articulo/periodismo-de-investigacion/2016/03/6/mafia-china-arrasa-con-pepino-de-mar 3 http://www.iucnredlist.org/details/180373/0 4 https://www.cites.org/eng/app/appendices.php 5 Isostichopus fuscus has been found in: Colombia (mainland and Malpelo Is.); Costa Rica (mainland and Cocos Is.); Ecuador (main- land and Galápagos); El Salvador; Guatemala; Honduras; Mexico (Pacific coast and Revillagigedo Is.); Nicaragua; Panama; and Peru (Source: https://www.iucnredlist.org/species/180373/1621878#geographic-range) SPC Beche-de-mer Information Bulletin #39 – March 2019 43
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