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Revista mexicana de ciencias agrícolas

versão impressa ISSN 2007-0934

Rev. Mex. Cienc. Agríc vol.7 spe 14 Texcoco Fev./Mar. 2016

 

Essays

Global climate change: impacts and adaptation of Mexican aquaculture

Diego Esteban Platas-Rosado1  § 

Juan Cristóbal Hernández-Arzaba1 

Luling Preza-Lagunes1 

Luis González-Reynoso1 

1Colegio de Postgraduados-Campus Veracruz. Carretera Federal Xalapa-Veracruz, km 88.5, Tepetates, Municipio de Manlio Fabio Altamirano, Veracruz, México. A. P. 421, C. P. 91690. (jc.hernandez@colpos.mx; luling.preza@colpos.mx; luisgorey@yahoo.com.mx).


Abstract

Mexico is one of the most affected countries by the Global Climate Change (GCC). The state of Veracruz (located on the coast of the Gulf of Mexico) is impacted by strong hurricanes and tropical storms each year. This state is one of the largest producers of tilapia in the country. In 2010 three hurricanes in a row (Frank, Karl and Matthew), with a month of difference between them, strongly affected all aquaculture farms in the state. Till today many producers have not recovered from the damage, 200 units of commercial production and approximately 2000 small households units were affected and not just in Veracruz but in other states like Oaxaca, Tabasco and Chiapas were also disasters that were not considered. The production in Veracruz dropped from 10 000 t / year to 2 000 t in the present and the final product price increased from $40/kg to $65/kg at consumer level.

Keywords: climate change; economic impact; Mexican aquaculture

Resumen

México es uno de los países del mundo más afectado por el Cambio Climático Global (CCG). El estado de Veracruz (localizado en la costa del golfo de México) es impactado por fuertes ciclones y tormentas tropicales cada año. Este estado es uno de los mayores productores de tilapia en el país. En 2010 tres huracanes en línea (Frank, Karl y Matthew), con un mes de diferencia entre ellos, afectaron seriamente todas las granjas acuícolas del estado. En el presente muchos de los productores no se han recobrado, 200 unidades de producción comercial y aproximadamente 2 000 pequeñas unidades familiares fueron afectadas y no sólo en Veracruz pero en otros estados como Oaxaca, Tabasco y Chiapas también hubo desastres que no fueron contabilizados. La producción en Veracruz bajó de 10 000 t/año a 2 000 t en el presente y el precio del producto final se incrementó de $40/kg a $65/kg, al nivel de consumidor.

Palabras claves: acuacultura mexicana; cambio climático; impacto económico

Introduction

Aquaculture is strongly impacted by Global Climate Change (GCC) today and will be so in the future. Tropical storms, typhoons, cyclones, floods, high winds, tornadoes, and extreme temperatures are some of the natural disasters affecting aquaculture on land or offshore. The aquaculture sector can be the most affected primary productive activity by GCC, due to its strategic location on the coast or in low flooding areas due to their need for water availability. Most farms in Mexico are located along both coasts East (Gulf of Mexico and Caribbean Sea) and West (Pacific and Gulf of California) and are mainly of freshwater of ashore, mostly tilapia (Oreochromis niloticus), although there is saltwater in shrimp farms (Penaeus vannamei) in the Northeast (CONAPESCA, 2012).

In 2010 the east coast was hit by three hurricanes in a row, causing great economic losses, in terms of biomass and infrastructure, in aquaculture farms from Veracruz and neighboring states. These natural disasters were a watershed in the history of the sector, because the producers were not prepared for a phenomenon of this magnitude and with serious consequences. Institutional action as well as producer organizations played a major role in the quantification of material and biological loss. The damage report to government agencies to access funds for natural disasters, and the help with paperwork to access the funds aided a lot to the producers.

Institutions like the Postgraduate College - Campus Veracruz, have organized events with producers and stakeholders to share and document lessons learned and experiences for the future, as well as the development of recommendations manual to prepare for natural disasters; guidance document for new aquaculture producers who wish to venture into the activity, on which factors should be taken into account for the construction of a new farm. Public policy recommendations for the prevention of natural disasters in the aquaculture sector were also made.

2010 hurricanes

Mexico is one of the most affected countries, or perhaps the most impacted by GCC in the world. East Coast where the Gulf of Mexico and the Caribbean Sea are located, face each year several storms and tropical cyclones (CNA, 2012) (Figure 1). For example in 2005 in the Gulf of Mexico five hurricanes were formed in three months: Dennis on July 10th and Emily the 17th from the same month, Katrina on August 23rd with very well-known consequences for the city of New Orleans, Rita on September 23rd also hitting the Gulf Coast of Mexico, and the United States of America; Category 3 Wilma on October 21st, 2005 in the Caribbean Sea; all of them causing great losses in economic activities and infrastructure, but mostly lives in Mexico, Caribbean countries such as Cuba and EU.UU.

Figure 1 2005 hurricanes in the Gulf of Mexico (CNA, 2012). 

Veracruz and neighboring states like Tabasco, Chiapas and Oaxaca, in 2010 were impacted by three hurricanes in a row. Storm Frank (August 21st-23rd) hitting the Pacific Coast but its rain reached the Gulf of Mexico overfilling the Tezmacal and Miguel Aleman dams in Veracruz and Oaxaca. In this time the floodgates of the dams had be open to drain water excess and avoid bursting with unpredictable damage. Then there was the first evacuation of the emblematic city of Tlacotalpan, Veracruz (cultural heritage of humanity) of 20 000 inhabitants.

With Tropical Storm Frank the entire Papaloapan River basin was flooded, where hundreds of fish farms are located, all of them with losses of 100% bio-mass: fingerlings (small fish in growth stage) and harvest, and significant loss of infrastructure (Figure 2).

Figure 2 2010 Hurricanes in Veracruz. 

Hurricane Karl formed from September 11th in the northern coast of Venezuela, moving towards the north and on September 16 Karl became the strongest hurricane that has crossed over the Campeche Bay from 60 years ago. This impacted on September 17, 2010 at 11:30 am, one day after celebrating the bicentennial of national independence, as Category 3 on the Saffir-Simpson scale, on central Veracruz, exactly in the city Antigua 30 km north from Puerto de Veracruz. It affected the most populated area of the state and where most of fish farms are located. The losses were unquantifiable. This was followed by Igor and Julia storms forming in the Atlantic (Figure 3).

Figure 3 Hurricane Karl impacting Veracruz, followed by Igor and Julia. 

This phenomenon struck a strip of 40 km wide by 200 km long where high winds caused the demolition of more than 2 million trees (SMN, 2010). But the consequences worsened the next day with floods over several meters deep in whole villages because Karl hit the Pico de Orizaba and then poured all the water, which lasted 24 hours to reach the coast. Indeed it was the first time in thousands and perhaps millions of years that the Pico de Orizaba ran out of snow at the top.

Tropical Storm Matthew formed since September 20th in the Caribbean but touched ground in Veracruz until the 29th. This tropical storm was not very strong, but found a front cold that caused torrential rains in the south and north of Veracruz, causing flooding on both sides, because the ground was already very wet and rivers full by previous events. Matthew caused losses in fish farms in northern Veracruz and the second evacuation from Tlacotalpan when the return from the first event was not over yet.

Economic losses from 2010 hurricanes

Veracruz was the leading producer of tilapia in the country before 2010 hurricanes; with a production of 10 000 t / year (Figure 4). A census conducted by the Postgraduate College - Campus Veracruz, in 2009 and 2010 (before the rainy season) detected the existence of 800 commercial farms and households in 125 municipalities from the state, mainly in the central area. With other parallel studies and extrapolating to 212 municipalities, 2 000 aquaculture production units between large and small were detected in the state of Veracruz.

Figure 4 State participation in the production of tilapia, 2010. (CONAPESCA, 2012). 

Material losses accounted for the Product-service system Tilapia, National Union of fish producers and the Postgraduate College was $ 160 million pesos ($16 million USD), but the loss in biomass for non-harvested products, because all organisms were taken away by water flow reaches another $ 150 million pesos ($15 million USD). Losing also 6 000 direct jobs and impacting income from 25 000 people.

The latter were immediate losses, but the greater loss is consumer welfare, since Veracruz is one of the main consumers of fish in the country, consuming 10 000 t / year. The decrease in supply impacted the increase in consumer prices with an increase of $20 00 pesos / kg. This represents a loss to the consumer of $ 200 million pesos a year for three years that took to recovery, losing $600 million pesos ($ 60 million USD).

The damage caused was in different ways, some by flood (Figure 5), and short cuts on power. Others by falling trees on the ponds (Figure 6), others floating cages by dragging due to strong currents of water (Figure 7) and loss of genetic material selected for 20 years, which is invaluable in monetary terms (Figure 8).

Figure 5 Farm Pargo industries, before and after Hurricane Karl. 

Figure 6 Farm La Conquista, before and after Hurricane Karl. 

Figure 7 Farm Tilmex before and after the storm Matthew. 

Figure 8 Farm la Ravana. Loss of genetic material. 

The after-effects of hysteria consisted on producers and investors resistance to reinvest risk capital on farms. Trust loss in financial services and the refusal of agricultural insurance companies to cover aquaculture and natural disasters.

Actions and learned experiences

Institutions such as the Postgraduate College - Campus Veracruz, the Technological Institute of Boca del Rio and producer organizations like the National Union of fish farmers, product- service system tilapia, Veracruz Committees and Acuacultores Veracruzanos A. C. gave to the task of organizing the affected in documenting the effects of the phenomena and report them to CONAPESCA, as well as training them on filling out forms and have access to the Funds for Natural Disasters (FONDEN) which consisted of $ 16 000.00 pesos per farm, obtained for 200 farms in the state of Veracruz plus neighboring states. The agency and lobbying reached the highest decision level in the country (Figure 9). Forums were performed to reflect and make proposals to be prepared in the future events.

Figure 9 Forums and management on the impacts of the disasters of 2010. 

In the reflection period with all stakeholders, got to the conclusion that there were several serious mistakes on behalf of the producers and other agents. First, there had never been a series of natural disasters of this magnitude in such a consistent way; the area of impact from Hurricane Karl had not suffered a similar experience for 50 years. Then there was no way to prevent or be prepared for these phenomena. The other cause of the serious consequences was that the specific characteristic of aquaculture, all producers were following water source; that is, placed in the riskiest parts of their land in the lowest place on the sea level, river banks and lakes and in areas of high risk with rapid response streams.

The infrastructure was not prepared to resist winds and water currents so strong. Many farms survived the impact but lost biomass because they did not have emergency power plant and did not have enough fuel (diesel) for several days and even if some were ready the water reached the power plants and did not worked. There was not an aquaculture insurance that covered biomass and infrastructure loss in case of natural disaster, but there is no culture from the producers to insure harvest.

Recommendations

From the analysis made on the effects of natural disasters in aquaculture, several recommendations at producer level but also for decision makers in public sector policies were derived.

Among the most important recommendations was mentioned that natural phenomena are not under the control of human being and are unpredictable, the only thing to do is to be prepared for the event and know what to do after once it happened.

For producers it is suggested to select a space in the highest part of the land where the farm is going to be built to avoid floods, not worrying for pumping water, the cost of additional pumping is equivalent to flood insurance. Not to build on the margins of rivers and streams of quick response or water bodies with strong currents. Not having trees in the middle of the farm that can fall down on the ponds and break them. If this is not possible, to produce only in low risk seasons, that is in winter and spring.

For electricity to count with a power plant with enough capacity than required, build bases to more than one meter above ground and always have enough fuel for at least two weeks. The food, machinery and equipment warehouses and other valuables should be in a high building.

In the case of civil servants and decision makers it is suggested to seek insurance or to organize producers to insure both harvest and infrastructure. I.e. promote a prevention and insurance culture.

Conclusions

Global Climate Change is a natural phenomenon, caused by man, which is already present and significantly affects productive activities of the field. Mexico is one of the most impacted countries by this phenomenon and every year is likely to be hit by several hurricanes and tropical storms on the coasts and especially in the Gulf of Mexico.

The fish sector, due to its water source need to be carried out, has high risk facing GCC; however, there are measures that can mitigate the impact, these should be taken into account before the construction of the farms at producer level and internalize costs. At government level it is necessary to promote a prevention and insurance culture.

Literatura citada

CNA. 2012. Atlas de Riesgo en el Golfo de México. www.cna.gob.mx. [ Links ]

CONAPESCA. 2012. Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación, México. www.conapesca.gob.mx. [ Links ]

SMN. 2010. Karl impactó a Veracruz. www.smn.cna.gob.mx. [ Links ]

Received: November 2015; Accepted: February 2016

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