Juarez WAM Dec. 2016
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W RLD AQUACULTURE VOLUMEN 47, NÚMERO 4 LA REVISTA DE LA SOCIEDAD MUNDIAL DE ACUICULTURA DICIEMBRE 2016 CULTIVO DE TOTOABA EN MEXICO Totoaba Aquaculture and Conservation: Hope for an Endangered Fish from Mexico’s Sea of Cortez Lorenzo M. Juarez, Pablo A. Konietzko and Michael H. Schwarz This is the story of the m, and live up to 30 years totoaba Totoaba macdonaldi, (Berdegue 1955). Their body an iconic and highly valuable is elongated with a sharp fish from the Sea of Cortez (also snout, large oblique mouth, known as the Gulf of California) and a projecting lower jaw. in Mexico. Overfished to Juveniles eat mainly small commercial depletion in the first crustaceans off the bottom half of the twentieth century, and smaller fish from the the species is currently listed water column. Totoaba are as critically endangered and schooling fish endemic to it continues to be threatened the Sea of Cortez in Mexico by illegal fishing, habitat (NOAA 2016). Adults are degradation, and insufficient one of the top predator fishes enforcement of fishing and FIGURE 1. Adult totoaba in a broodstock maturation tank at the Earth in the upper Sea of Cortez environmental regulations. Ocean Farms hatchery. EOF photo by Fernando Cavalin. and have pelagic feeding Few fish are as interesting as habits, favoring sardines the totoaba from the standpoints of and anchovies, although benthic biology, conservation, sociology, and crustaceans, such as shrimps and regulation. Now aquaculture has the crabs are also part of their diet potential to bring totoaba back as a (Cisneros-Mata et al. 1995). sustainable resource and to generate Totoaba spawn during the late prosperity in an economically- spring in the turbid waters of the depressed region of Mexico. Colorado River delta, a biosphere Totoaba are remarkably well-suit- reserve at the northernmost tip of ed for aquaculture. Hatchery and grow- the Sea (Fig. 2). Juveniles typically out technologies have been developed stay in that area for one or two and commercial production trials are years before migrating south on currently underway. Totoaba growth the peninsular side, following the is among the fastest reported for any schools of sardines and anchovies farmed marine fish and their quality on which they feed. Their summer as a food fish is high. Their status as a feeding grounds extend south to critically-endangered species presents Bahia Concepcion on the Baja unique challenges. In this article we Peninsula, and occasionally present the history of the fishery and farther south to the Bay of La Paz how perverse economic incentives and (Valenzuela-Quiñonez 2014), and enforcement challenges resulted in its possibly even as far as San Jose commercial depletion. We go on to FIGURE 2. Map of Northwest Mexico showing the Gulf of del Cabo (Peet 2009). However, present current advances in hatchery California and sites relevant to the totoaba fishery (mapmaker. we recently received a trustworthy and grow-out and to show how regula- nationalgeographic.org, with permission). record and photographs of an tory considerations affect the species, approximately 45-kg totoaba leading to an opportunity for fishermen, regulators, researchers, captured south of Puerto Vallarta, much farther to the south of the aquaculturists, and conservationists to work together to restore the reported range of the species. fishery, promote regional socio-economic development, and ensure Fish in these summer feeding areas are thought to cross the the preservation of this iconic species for future generations. Sea to the mainland side, south to the delta of the Fuerte River in The totoaba (Fig. 1) is the largest of the Sciaenidae, a family Sinaloa, where they feed during the fall. Once they become adults that includes fish commonly known as drums, croakers, corvinas, after another 4 or 5 years, schools of totoaba migrate northward in and sea bass. Totoaba can reach a weight of 135 kg, a length of 2 the winter along the eastern coast of the Sea of Cortez, returning 30 DECEMBER 2016 • WORLD AQUACULTURE • WWW.WAS.ORG but now overfished and affected by pollution to the point that it is extremely rare to catch this fish. Totoaba maws are valued for their high collagen content and some people believe they can boost fertility, circulation, skin vitality, and longevity. Because of these perceived properties and their scarcity and illegal status, dried swim bladders of totoaba command astronomical prices. Typical prices to the consumer in Hong Kong vary from about US$2,600 for a 100-g dry totoaba bladder to US$25,000 for a 500-g unit. The Chinese have been known to stockpile the more valuable bladders as a form of speculative investment and to use them as currency. Illegal fishermen in the upper Sea of Cortez are paid US$3,000-5,000/kg of fresh swim bladder, known as buche de totoaba in Mexico. Historically Chinese demand for totoaba maws drove the development of the commercial fishery in the FIGURE 3. Totoaba on the beach after having their swim bladders extracted upper Sea of Cortez and, paired with challenges in enforcement by indigenous Seri women and children in Bahia Kino, circa 1935. The of fishing regulations, contributed to its eventual collapse in the boy on the left is holding a large swim bladder. Reprinted with permission mid-twentieth century. To this day, the economic incentives for from the University of Arizona Libraries Special Collections, Laurence Huey illegal fishing and trafficking of totoaba continue to threaten Collection # 9232. the possibility of establishing a sustainable fishery and the very existence of totoaba and related valuable species. 2500 18 The Totoaba Fishery 16 The story of the totoaba fishery is one of greed, short 2000 14 Catch Volume sightedness, and ineffective governance, tragically driving a 12 valuable natural resource to near extinction, while contributing to 1500 ) 3 the impoverishment of the local population, rather than to their 10 (m 9 prosperity. Before the commercial fishery began at the turn of the 8 twentieth century, totoaba were part of the diet and folklore of the Volume X 10 Reported Catch (MT) 1000 indigenous people. The Seri people of Sonora used harpoons with 6 large points to spear totoaba in shallow nearshore waters (Bahre et 4 500 al. 2000). Stories abound of how incredibly plentiful and large the 2 totoaba were in those days. Asian demand for swim bladders prompted the beginning of 0 0 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 a hook and line fishery around 1910 in the coastal waters between Guaymas and the delta of the Fuerte River. Devoid of effective FIGURE 4. Reported annual catch of totoaba in the Sea of Cortez, 1930 regulation, in a frontier region often forgotten by authorities, to 1975, and annual volume of Colorado River water delivered to Mexico the exploitation of totoaba was characterized by wanton waste. (from Cisneros-Mata et al. 1995). Fish were dragged onto the beach, slit open, and their swim bladders were removed, dried, and shipped to China via San to their natal spawning and nursery areas near the Colorado River Francisco (Bahre et al. 2000). Lack of refrigeration and transport delta, where they remain through the spawning period the following infrastructure, together with the high price of the swim bladder, spring (Cisneros-Mata et al. 1995). made perverse economic sense for the totoaba carcasses to be left on the beaches to rot (Fig. 3). These practices accelerated so swiftly The Totoaba Swim Bladder that totoaba was already commercially depleted in that zone by the The swim bladder is an internal, gas-filled organ that fish use 1920s, and fishing moved north towards the mouth of the Colorado to regulate buoyancy. In totoaba and other sound-producing fish it River, the spawning and nursery grounds of the fish (Kira 2005). also functions as a resonating chamber for a group of specialized In the early 1920s fishermen discovered that totoaba muscles that vibrate against it, producing a croaking or drumming aggregated for spawning in great numbers in the waters of the sound used for communication and location purposes. The swim Colorado River delta. The commercial fishery took advantage bladder has properties that make it highly appreciated as an of this reproductive migration and thus became the most ingredient in Chinese cuisine and medicine. Fish swim bladders, important economic activity in the area; so important that it known as maws, are prepared in traditional soups or stews. Dried brought about some of the first permanent settlements along the swim bladders of totoaba are known in China as jin quian min, northern coastline of Sonora and Baja California (Bahre et al. which translates to “money maw.” They are highly appreciated due 2000), including the fishing camps of San Felipe (1923), Golfo to their similarity to those of the Chinese bahaba, or giant yellow de Santa Clara (1927), and Puerto Peñasco (1928). A market for croaker Bahaba taipingensis, once abundant in the south of China, (CONTINUED ON PAGE 32) WWW.WAS.ORG • WORLD AQUACULTURE • DECEMBER 2016 31 totoaba meat began to develop across the US border in California The evolution of totoaba capture between 1930 and 1975 and Arizona. During those years the totoaba fishery attracted (Fig. 4) constitutes a typical example of overfishing and habitat people to areas that previously had been practically unpopulated, degradation contributing to the collapse of a fishery. The with important sociological and ethnographic consequences. For emerging industry responded to the growing US market by example, permanent settlement of the Seri indigenous group in developing transportation and refrigeration infrastructure and by Bahia Kino ended their traditional seminomadic ways as hunter- improving fishing gear efficiency and boat facilities (Flanagan and gatherers and was the main cause of their assimilation into Mexican Hendrickson 1976).