Luis González-Reynoso

Bio: Luis González-Reynoso is an academic researcher. The author has contributed to research in topics: Aquaculture & Hypophthalmus. The author has an hindex of 1, co-authored 3 publications receiving 6 citations.

A theoretical analysis for the study of agroecosystems

Abstract: The agroecosystem (AES) is a concept to identify a unit of study at different hierarchical levels of primary production systems that sets the management of man for adaptation, modification and interaction with natural resources for food production and services requiring by society. This essay aims to make a reflection about the theories-approaches bases on the concept of agro-ecosystem from a dialectical approach and propose to use it to understand the agriculture.

Avances del Sargo Archosargus probatocephalus (WALBAUM, 1792) en la acuicultura como respuesta al cambio climático

Abstract: A reduction of up to 40% in fishing due to the effects of climate change in tropical regions is expected, causing the impact on primary productivity affecting mainly fish populations that carry out their reproduction in reefs and estuaries; In addition to this, there is no physical and economic access to sufficient, safe and nutritious food to meet the food needs of the population. For these reasons aquaculture was thought of as a response to the reduction of fishing and sustainable food production, with a native fish that lives in areas of estuaries and reefs, such as the sea bream, which due to its biological and economic characteristics may be suitable for aquaculture To this end, an experimental culture was established from December 2011 to March 2012 at the Technological Institute of Boca del Rio, consisting of 2circular ponds of 25 m3, in closed area, with aquaculture recirculation system, salinity of 30 ppm (+1), pH of 8.3 (+ 0.4) and temperature of 26 ° C (+ 2). At first, aggressive behavior was observed, so shelters were introduced and an improvement was observed. A diet of bivalve molluscs was established, afterwith a custard based on squid and finally with balanced food. Being that it had good adaptation to captivity, good acceptance of the balanced feed, obtaining a 95% survival in culture, in addition the sea bream has good wreck in the market, for these reasons it is considered a suitable species for the culture.

Economic Impact and Feasibility of Striped Catfish Farming (Pangasius hypophthalmus) in Mexico

Abstract: Objective: To assess the productive behavior of Pangasius hypophthalmus in actual rural aquaculture farming conditions for the state of Veracruz, Mexico. Methodology: The study had a duration of 331 days in a circular pond of 135 m3, with no aeration. 2000 juveniles were bred upon attaining 7.9 g; they were fed once a day, four days a week. Their weight and length were assessed every 15 days. Results: The growth of P. hypophthalmus reached 900 g in 150 days at temperatures between 26 y 34 °C, with growths of 100 g in 150 days at temperatures between 22 and 26 °C. An average final weight of 1254 kg and a survival of 87.8% were attained for a total production of 2.2 t. These organisms may attain 2 kg per year at 26 to 35 °C-1. Study limitations: For a period of 153 days, water temperatures greater than 26°C limited the growth of this fish. Conclusions: The Pangasius hypophthalmus species represents an aquaculture alternative with high potential for tropical areas of Mexico, mainly where electric power availability is limited.

Objetivos de Desarrollo Sostenible

Abstract: This article reflects on the contrast between justice and the social contract in the globalized world of the 21st century, which faces increasing insecurity and the expectations of sustainable development. It exposes the causes for the widespread global distrust that has been growing since the middle of the last century and is affecting the prospects of a safe world headed to sustainable development. It presents the agreement of the post-modern social contract in the Objectives of Sustainable Development (ODS) as the last opportunity to redirect the egalitarian coexistence of humanity, without compromising the next generations, as John Rawls indicates. It also stresses the importance of certainty in the development and security set out in these objectives as an essential characteristic of post-modernity.

La diversidad de arvenses de los agroecosistemas maiceros de Cuba, Angola y México

Abstract: Es determinante conocer las arvenses dominantes en cualquier territorio para poder recomendar los sistemas de manejo mas adecuados, a la vez que se logra hacer un uso mas eficiente de las bondades de las especies, debido a sus valores utilitarios dentro de la diversidad biologica. Entre los anos 2008 y 2011 se llevo a cabo una investigacion dirigida a la determinacion de las arvenses dominantes En los agroecosistemas del territorio San Jose de Las Lajas, Cuba, en Huambo, Angola y en Chiapas, Mexico, se evaluaron 25 agroecosistemas, de los cuales tres correspondieron a fincas de Huambo y una de Mexico; donde el resto son fincas cubanas. El 100 % de los agroecosistemas han tenido la mision de producir alimentos; sin embargo, todas constituyen agroecosistemas integrales y las arvenses dominantes y subordinadas se caracterizaron por agroecosistemas. Se evaluaron las causas de su presencia segun los cultivos precedentes y, con la informacion de los actores locales, se determinaron las bondades de cada especie dentro de la diversidad biologica. Se determino el indice de predominio y de similitud de especies entre agroecosistemas (Leyva y col, 1999; Leyva y col, 2005). La diversidad total de arvenses alcanzo la cifra superior a 50 especies; en las fincas cubanas fue superior. La menor diversidad de especies con alta abundancia se encontro en Mexico, debido al manejo monocultural del cultivo con uso intensivo de herbicidas residuales.

Comparison of agroecosystem assessment frameworks

Abstract: The formulation of the concept of sustainability indicates the need to consider in a integral and global way the productive processes, as well as, the obtaining of sustainability measures. In this way lists of indicators and characteristics that they should have were made. Concepts, criteria and methodologies were then proposed to select / derive / build indicators that define the sustainability indexes or that were part of different sustainability evaluation frameworks. In Latin America, systems have been developed to evaluate agroecosystems with an unequal degree of conceptualization and rigor, and also with different criteria. Since these systems have been fairly analyzed in their conceptual phase as well as in their applied phase, in this article we propose to compare the "Framework for the evaluation of natural resource management systems incorporating sustainability indicators" (MESMIS) and the framework "Evaluation of agroecosystems through sustainability indicators", looking for similarities and differences between them, in order to highlight their advantages and limitations. As a general conclusion it is stated that none of the two frameworks presents in general, overcoming characteristics. However, the systemic approach present in the MESMIS framework gives it greater heuristic power.

The fisheries and aquaculture sector in Latin America: Exports to East Asia and production

Abstract: The Asian giant has agitated foreign trade in Latin America due to easy access to this market, tariff policies, and international agreements. In the face of a globalized world, in the last decade fisheries and aquaculture entrepreneurs of Latin American countries have taken on the challenge of getting their products known at International Fisheries and Aquaculture Exhibition fairs in Asian countries, which has generated an increase in the exportation of their products. Fishing and aquaculture exports are a variable of the economy of each country reflected in the gross domestic product and foreign exchange results. The present research work analyzed the fishing and aquaculture sector through the first difference Generalized Method of Moments estimator to establish the behavior of exports from Latin American countries to Asia, the production of each Latin American country, and the subsequent effect on the economic growth of the fishing and aquaculture sector during the period 2012–2019. The findings of this article suggest the significant positive relationship between output and economic growth, and a non-significant negative relationship between exports to East Asia and the economy.