Jorge López RochaUniversidad Nacional Autónoma de México | UNAM · School of Science
Jorge López Rocha
Professor
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76
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Introduction
Skills and Expertise
Additional affiliations
January 2009 - present
Instituto Politécnico Nacional (IPN)
January 2008 - present
Centro de Investigaciones Biológicas del Noroeste
Publications
Publications (76)
Es importante reconocer el estado multiespecífico en las capturas de pulpo en Yucatán. Con esto, se podrán generar esquemas de explotación capaces de determinar momentos en que se pueda poner en riesgo al recurso. Si bien es cierto que el potencial económico podría estar lejos de sufrir un impacto negativo, es necesario recordar que esta actividad...
El presente libro, es el resultado de uno de los componentes del proyecto multidisciplinario e interinstitucional titulado ”Caracterización de la Pesca Artesanal
en la Península de Yucatán: Identificando Unidades de Manejo”, financiado por el CONACYT (Fondo SEP-CONACYT-Clave 252215), el cual nos permitió acércanos a la pesca artesanal desde varios...
Es importante reconocer el estado multiespecífico en las capturas de pulpo en Yucatán. Con esto, se podrán generar esquemas de explotación capaces de determinar momentos en que se pueda poner en riesgo al recurso. Si bien es cierto que el potencial económico podría estar lejos de sufrir un impacto negativo, es necesario recordar que esta actividad...
Spatial-temporal variations of discarded catches associated with a shrimp-small scale fishery from the Celestun lagoon, Yucatan, Mexico, were analyzed throughout seasonal and spatial (inner, middle, and external estuarine zones) physicochemical gradients to observe the influence of ecological patterns on discarded ichthyofauna. Differences in abundan...
This paper uses over a decade’s worth of media coverage of sea cucumber crime (smuggling and poaching) in Mexico,
in order to characterise the spatio-temporal magnitude of the problem and to better understand the modus operandi of those engaged in this form of wildlife crime. Towards this goal, we analysed and mapped incidents of crime relating to...
Correlative ecological niche models have been widely used to infer the organisms' environmental suitability; nevertheless, the relationship between this estimated suitability and their abundance is less clear. The ecological theory proposes that the internal structure of a species niche determines its abundance. Specifically, abundance should decre...
La pesca es la única actividad del sector productivo primario donde no hay incentivos para incrementar la capacidad de producción, esto es, se depende de la capacidad natural de producción de las poblaciones silvestres. Esto significa que hay un límite para la producción, y por lo mismo riesgos de agotamiento si no hay controles. Esto es lo que hac...
El aprovechamiento de los recursos pesqueros en la península de Yucatán fue y sigue siendo una actividad muy importante, principalmente en las localidades costeras. Desde los antiguos mayas se hacía uso de la riqueza pesquera de la región, en ese entonces con balsas de madera, redes, anzuelos y arpones de materiales naturales como textiles, conchas...
La presnete obra, es el resultado de uno de los com- ponentes de un proyecto multidisciplinario e inte- rinstitucional titulado “Caracterización de la Pesca Arte- sanal en la Península de Yucatán: Identificando Unidades de Manejo”, financiado por el conacyt (Fondo sep-cona- cyt-Clave 252215), el cual nos permitió acércanos a la pesca artesanal desd...
Clams of the family Veneridae in northwest Mexico have traditionally been exploited by small-scale fisheries. Despite their socioeconomic importance for coastal communities in the region, most catch zones are currently in decline due to a lack of harvest control regulations that would impede the depletion of local fishing banks. In Puerto Libertad,...
Fisheries play critical roles in food supply and income for human communities worldwide. Unfortunately, the fishery distribution have been changing due to anthropogenic climate change (CC). In this sense, this study analyses were directed to predict the suitability and distribution of red octopus (Octopus maya), an endemic and commercially importan...
The relationship between total length and total weight (LWR) of four commercial species of finfish captured in the southern Gulf of Mexico (Lachnolaimus maximus, Ocyurus chrysurus, Mycteroperca bonaci, and Mycteroperca microlepis) was estimated. Two of these species are captured in the region by the small-scale fleet, while the other two are target...
The understanding of fishing effort allocation has been recognized as a key feature within the spatial management planning of fisheries. In small-scale fisheries this assessment is challenging because of their multi-specific context. This has resulted in management regulations that do not fulfill their objectives. Therefore, the analysis of vessels...
Formal and informal institutions govern fisheries around the world. Yucatan’s sea cucumber fishery is not an exemption, the sudden and fast development of the fishery in 2010 has motivated the creation of informal and illegal forms of organization. The prices, buyers’ interest and the fishing effort substantially increased, being followed by illega...
A decade ago, the Four-sided sea cucumber, Isostichopus badionotus, became an important fishery in the Yucatan peninsula, Mexico. However, difficulties in fishery management caused deterioration in its population and fishery. Consequently, at this time it is urgent to identify viable strategies to achieve its population restoration. Survival and gr...
Sea cucumber fishing emerged as a new fishing activity in the Yucatan
Peninsula and quickly became one of the most important
fisheries in the region due to the demand and the high prices that
this resource can reach. However, after the boom of the first years
of exploitation, the species that sustains the fishery in Yucatan,
Isostichopus badionotus...
The octopus is the main fishing resource caught on the coasts of
the Yucatan Peninsula due to catch volume and price. The catches
are composed of the red octopus Octopus maya and common
octopus Octopus vulgaris type II, of which Yucatán and Campeche
are the main producers. Of the total number, O. maya contributes
around 74% and O. vulgaris type II...
Population parameters of Diadema mexicanum have not yet been studied; therefore, the objective of this work was to describe, for the first time, the growth and mortality by age of this sea urchin. The growth curve was determined by applying a modal progression analysis of the length-frequency distribution sample to determine the number of cohorts p...
ABSTRACT. An Octopus briareus specimen was recorded off Port Sisal, Yucatán, Mexico. This finding represents the first record of O. briareus in the southern Gulf of Mexico, expanding the currently known westernmost distribution area for this species on the American continent. The specimen was captured by scientific divers performing routine mainten...
Sportfishing is an activity of increasing popularity that involves a large number of users and high levels of fishing effort. In Yucatan, most of the target species in sport fishing are the same as those of commercial fisheries. However, there is no record of fishing effort or catch volumes. Thus the impact of sport fishing on these populations is...
The density, selectivity and vulnerability by sex of Atlantic blue crab (Callinectes sapidus) in the Yucatan coast were estimated using a Jolly–Seber mark–recapture model. A total of 614 individuals of C. sapidus were captured, of which 336 were marked and of these 20 were recaptured. Overall male:female ratio was 1:3.78. The selectivity of fishing...
Growth rates of the brown shrimp Penaeus aztecus Ives, 1891 and pink shrimp Penaeus duorarum Burkenroad, 1931 were estimated using length-frequency data in the hypersaline coastal lagoon, Laguna Madre of Tamaulipas, Mexico. The influence of environmental variables (salinity and temperature) and shrimp body size on the growth of both penaeid species...
Los países asiáticos han ejercido una ambiciosa demanda por el pepino de mar ocasionando que actualmente la pesquería de este recurso se encuentre en prácticamente todos los mares del planeta. Desde 2010 se ha practicado una intensa explotación de pepinos de mar en la Península de Yucatán, lo que ha conducido a declinaciones en las abundancias del...
Since 2010, the sea cucumber Isostichopus badionotus, has been heavily exploited by small-scale fisheries in the Yucatan peninsula, Mexico. Despite management efforts, in the northwest fishing zone of the peninsula, intense fishing pressure led to a decrease in the sea cucumber abundance and discouraged commercial fishing in the area. The objective...
Understanding fishery market systems is vital to promoting the efficient development of small-scale fisheries. It can assist in the refocusing of public policy on goals beyond merely maintaining production, which promotes the construction of social capital that favors governance in environmental and/or economic crises. This study is an analysis of...
Small-scale fishing as an economic activity and social sustainability in coastal areas, has been expanding widely with the entry of new members, but has also been modified in ways of operation in accordance with changes in the availability of resources and conditions. Biogeographical information of the places where fishing takes place. In this sens...
The exploitation of bivalve molluscs in new fishing areas generally begins with scarce or no biological and fishery information to support management measures. The objective of this study was to estimate the morphometric relationships, growth parameters, and natural mortality in recently exploited populations of Megapitaria aurantiaca, Megapitaria...
The Natural Mortality coefficient (M) is a key parameter for stock assessments. The need to establish age-specific natural mortality coefficients is widely recognized because M decreases rapidly over the early stages of the life cycle until it reaches a stable M value around the age-at-maturity. The aim of this study was to estimate M during the li...
These results were obtained from GIM model software
Raw data (simulated data, Fig. 2).
R code for simulation of Chen & Watanabe model
La pesca de pulpo en la penísula de Yucatán es la mayor pesquería de pulpo en América y una de las más grandes en el mundo. En la península de Yucatán la pesquería de pulpo involucra la captura de dos especies: Octopus maya y O. vulgaris . Ésta regulada por la Carta Nacional Pesquera y las normas oficiales mexicanas NOM-0008-PESCA-1993 y NOM-009-PE...
La pesca deportiva es una actividad creciente que involucra una gran cantidad de usuarios y altos niveles de esfuerzo pesquero. En Yucatán algunas especies capturadas deportivamente son las mismas que las capturadas por la pesca comercial, sin embargo no se tienen registros del esfuerzo de pesca o volúmenes de captura y es desconocido el impacto de...
A short-term Jolly–Seber mark-recapture model experiment is described. This experiment was aimed at estimating the rate of catch per unit effort (CPUE) and the catchability coefficient (q) of the Atlantic blue crab ( Callinectes sapidus ) in the fishing port of Sisal, Yucatan, Mexico. To estimate the local population size, 52 traps were deployed al...
Background. The king angelfi sh, Holacanthus passer Valenciennes, 1846, is one of the principal species captured in the Gulf of California, Mexico, for the purpose of the aquarium trade. Although the species has been exploited for more than 40 years, studies have not yet been undertaken to understand the population parameters required for adequate...
RESUMEN
En México las jaibas son un recurso comercial muy importante ya que el valor de sus capturas se encuentra ubicado en el décimo lugar a nivel nacional. En Yucatán es uno de los recursos que menos información se tiene en comparación con otros recursos de importancia económica, como el pulpo o el mero, por lo que se desconocen los impactos am...
Los bosques de Sargassum spp constituyen ecosistemas que proporcionan importantes servicios ambientales relacionados con la alta diversidad de especies que mantienen. Entre estos servicios, destaca su función como sitios de reclutamiento y alimentación de especies. Este estudio describe la variación espacio-temporal de la cobertura de los bosques d...
The lion-paw scallop Nodipecten subnodosus is a commercially important resource in the northwest of Mexico; however few studies evaluate its growth. Length of shell was used to estimate individual growth parameters of the lion-paw scallop from a wild population. Monthly samplings were performed from January to December 2006 in Bahia de Los Angeles...
Anthropogenic activities have been the major cause of watershed deterioration in many parts of the world, negatively impacting inland fisheries. In Mexico, freshwater fishing represents a source of protein, income, and employment for rural communities; however, in the national fisheries statistics they only account for 3% of the total production, a...
The red octopus Octopus maya is an endemic species of the continental shelf of the Yucatan Peninsula, Mexico and supports the largest octopus fishery in the American continent. Little is, however, known about its spatial dynamics. The study of the space-time variation of catchability is a key element in the stock assessment, because it allows behav...
Uno de los principales riesgos para la conservación de la biodiversidad marina lo constituyen las pesquerías para las cuales no existe información en la que se pueda basar la toma de decisiones para una adecuada
administración de los recursos explotados. La mayoría de las pesquerías en el mundo no cuentan con
información científicamente validada so...
To measure secondary productivity of mangrove systems, we estimated the abundance (individuals/m 2) and mass increment (g/month) of the two bivalve species: the black ark Anadara tuberculosa and palmate oyster Sac-costrea palmula. Mass increments were based on individual growth rates derived from length-frequency distributions analyses. Samples wer...
Se estudiaron la abundancia estacional y la selectividad de las principales especies de crustáceos asociadas a la pesca de la jaiba azul, en el puerto de Sisal, Yucatán, México. Para ello se utilizaron 52 trampas jaiberas, divididas en cuatro transectos colocados de manera paralela, a una distancia de 100, 150, 200 y 250 m de la línea de costa. Cad...
A predator–prey model was applied to the red grouper Epinephelus morio fishery from Yucatan, Mexico, with the aim of understanding the spatial behaviour of a mid-sized fishing fleet. The heterogeneity of the environ-ment was considered, and different habitat quality levels were determined to address environmental differences. The behaviour of the f...
RESUMEN La extracción de pepino de mar en la península de Yucatán constituye una nueva pesquería. En el 2013 será declarada oficialmente como pesca comercial, por lo que resulta importante generar los conocimientos tanto biológicos-pesqueros como socioeconómicos en que estarán basadas las medidas de manejo para un aprovechamiento sustentable. En es...
Mangrove ecosystems are a critical habitat for many species. The productivity of mangroves is important due its contribution of organic detritus and secondary production. The objective was to identify indicators of secondary productivity of mangrove systems to establish a baseline for measuring changes in the mangrove system due potential natural o...
The spatial dynamics of the red grouper Epinephelus morio plays a fundamental role in the fishery management on the Campeche Bank, where it is overfished. The objective of this study was to characterize the spatial dynamics of this population. We used a dynamic model of spatial distribution to estimate population movement rates between adjacent are...
La extracción de pepino de mar en la península de Yucatán constituye una nueva pesquería. En el 2013 será declarada oficialmente como pesca comercial, por lo que resulta importante generar los conocimientos tanto biológicos-pesqueros como socioeconómicos en que estarán basadas las medidas de manejo para un aprovechamiento sustentable. En este senti...
Indirect methods such as length–frequency analysis have not been recommended for growth estimation in octopus (length is not a good measure of size for soft-bodied organisms; size is not a good indicator of age because of the high interindividual variability in growth rates and an asymptotic growth is often assumed). However, these methods are stil...
Mangrove ecosystems are critical habitats for many species, and their productivity is important because of their contribution of organic detritus and secondary production. The objective of this study was to identify suitable indicators of secondary productivity of mangrove systems, in order to establish a baseline for measuring changes in the mangr...
Mangrove ecosystems are critical habitats for many species, and their productivity is important because of their contribution of organic detritus and secondary production. The objective of this study was to identify suitable indicators of secondary productivity of mangrove systems, in order to establish a baseline for measuring changes in the mangr...
La pesquería de pulpo es la más importante de la península de Yucatán. Este recurso es extraído principalmente por una flota ribereña distribuida en 13 puertos de Campeche y Yucatán. Las capturas de pulpo en los últimos años han presentado grandes fluctuaciones, en algunos casos, los años con capturas extremadamente bajas han sido explicadas por la...
Recientemente se ha iniciado la explotación pesquera del pepino de mar Isostichopus badionotus en la península de Yucatán, por lo que es necesario generar la información para establecer las estrategias de explotación y medidas de manejo adecuadas. Uno de los aspectos básicos a conocer en el inicio de una pesquería es la distribución y abundancia de...
The reproductive cycle of Hyotissa hyotis during El Niño 1997-98 and La Niña 1998-99 events in La Ballena Island, Gulf of California, Mexico was examined in relation to sea water temperature and chlorophyll a concentration. Every month, from January 1997 to December 1999, 30 adult specimens of H. hyotis were collected at 10 m depth by scuba diving....
Piñera. 2010. La pesquería de la almeja chocolata Megapitaria squalida (Bivalvia: Veneridae) en Baja California Sur, México. Hidrobiológica 20 (3): 230-237. RESUMEN La almeja chocolata Megapitaria squalida representa una de las pesquerías de bivalvos más importantes en Baja California Sur. Sin embargo, poco se sabe sobre el estado actual de esta pe...
En México, la pesquería de pulpo ocupa el octavolugar en cuanto a captura. Más de 90% de la producción nacional proviene de la península de Yucatán, donde se extrae O. vulgaris y O. maya (Solís-Ramírez y Chávez, 1986; Anónimo, 2006). En el Pacífico mexicano y golfo de California la captura de pulpo es considerablemente menor (Anónimo, 2004a) y de a...
