Alonso Ibarra | Universidad Nacional Autónoma de México (original) (raw)

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Papers by Alonso Ibarra

Research paper thumbnail of Modelling the factors that influence fish guilds composition using a back-propagation network: assessment of metrics for indices of biotic integrity

Ecological Modelling, 2003

Research paper thumbnail of Economic reasons, ecological actions and social consequences in the Mexican sea cucumber fishery

SPC Beche-de-Mer Information Bulletin, Jan 1, 2002

Increasing attention is being given to the effects of international trade on the environment, esp... more Increasing attention is being given to the effects of international trade on the environment, especially in situations where biodiversity conservation is opposed to export-led industries such as fisheries. Even many small-scale fisheries are not an exception. When a natural ...

Research paper thumbnail of Longitudinal diversity patterns in streams: comparing invertebrates and fish communities

Archiv Fur Hydrobiologie, Jan 1, 2003

ABSTRACT The aim of our study was to compare the longitudinal pattern of invertebrate EPTC (Ephem... more ABSTRACT The aim of our study was to compare the longitudinal pattern of invertebrate EPTC (Ephemeroptera-Plecoptera-Trichoptera-Coleoptera) taxa richness and fish species richness, at the Adour-Garonne drainage basin scale (SW France). We considered 177 sampling sites for invertebrates and 109 sampling sites for fish, spread over the whole stream system. The statistical treatment consisted in simple linear regressions including bootstrap simulations, performed between the logarithm of EPTC taxa or fish species richness and the logarithm of the distance from the source. The model obtained for EPTC fitted a parabola with a maximal taxa richness in the intermediate part of the river continuum, while the model obtained for fish corresponded to a linear increase in species richness with the distance from the source. This difference in spatial distribution pattern is discussed with respect to the benthic nature of invertebrates vs. the pelagic nature of most fish species.

Research paper thumbnail of The new economic model and marine fisheries development in Latin America

World Development, Jan 1, 2000

Research paper thumbnail of Neoliberalism and its impact on overfishing and overcapitalisation in the marine fisheries of Chile, Mexico and Peru

Research paper thumbnail of The Political Economy of Marine Fisheries Development in Peru, Chile and Mexico

Journal of Latin American …, Jan 1, 2000

... In late i980, the ministry announced the closure of the pilchard fishery in an ... strategy w... more ... In late i980, the ministry announced the closure of the pilchard fishery in an ... strategy was complemented by a new regulatory framework and sectoral development progamme, courtesy of ... 4 A. Garcia Mesinas 'Current Status and Strategies of Peruvian Fisheries', in M. Murphy (ed ...

Research paper thumbnail of Modelling the factors that influence fish guilds composition using a back-propagation network: assessment of metrics for indices of biotic integrity

Ecological Modelling, 2003

Research paper thumbnail of Economic reasons, ecological actions and social consequences in the Mexican sea cucumber fishery

SPC Beche-de-Mer Information Bulletin, Jan 1, 2002

Increasing attention is being given to the effects of international trade on the environment, esp... more Increasing attention is being given to the effects of international trade on the environment, especially in situations where biodiversity conservation is opposed to export-led industries such as fisheries. Even many small-scale fisheries are not an exception. When a natural ...

Research paper thumbnail of Longitudinal diversity patterns in streams: comparing invertebrates and fish communities

Archiv Fur Hydrobiologie, Jan 1, 2003

ABSTRACT The aim of our study was to compare the longitudinal pattern of invertebrate EPTC (Ephem... more ABSTRACT The aim of our study was to compare the longitudinal pattern of invertebrate EPTC (Ephemeroptera-Plecoptera-Trichoptera-Coleoptera) taxa richness and fish species richness, at the Adour-Garonne drainage basin scale (SW France). We considered 177 sampling sites for invertebrates and 109 sampling sites for fish, spread over the whole stream system. The statistical treatment consisted in simple linear regressions including bootstrap simulations, performed between the logarithm of EPTC taxa or fish species richness and the logarithm of the distance from the source. The model obtained for EPTC fitted a parabola with a maximal taxa richness in the intermediate part of the river continuum, while the model obtained for fish corresponded to a linear increase in species richness with the distance from the source. This difference in spatial distribution pattern is discussed with respect to the benthic nature of invertebrates vs. the pelagic nature of most fish species.

Research paper thumbnail of The new economic model and marine fisheries development in Latin America

World Development, Jan 1, 2000

Research paper thumbnail of Neoliberalism and its impact on overfishing and overcapitalisation in the marine fisheries of Chile, Mexico and Peru

Research paper thumbnail of The Political Economy of Marine Fisheries Development in Peru, Chile and Mexico

Journal of Latin American …, Jan 1, 2000

... In late i980, the ministry announced the closure of the pilchard fishery in an ... strategy w... more ... In late i980, the ministry announced the closure of the pilchard fishery in an ... strategy was complemented by a new regulatory framework and sectoral development progamme, courtesy of ... 4 A. Garcia Mesinas 'Current Status and Strategies of Peruvian Fisheries', in M. Murphy (ed ...

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