Papers by Michel Martinez
Journal of Entomological Science, 2012
Journal of Entomological Science, 2010
Journal of Entomological Science, 2010
Entomological News, 2010
ABSTRACT
Proceedings of the Royal Society B: Biological Sciences, 2006
It has recently been reported that the synaptic acetylcholinesterase (AChE) in mosquitoes is enco... more It has recently been reported that the synaptic acetylcholinesterase (AChE) in mosquitoes is encoded by the ace-1 gene, distinct and divergent from the ace-2 gene, which performs this function in Drosophila. This is an unprecedented situation within the Diptera order because both ace genes derive from an old duplication and are present in most insects and arthropods. Nevertheless, Drosophila possesses only the ace-2 gene. Thus, a secondary loss occurred during the evolution of Diptera, implying a vital function switch from one gene (ace-1) to the other (ace-2). We sampled 78 species, representing 50 families (27% of the Dipteran families) spread over all major subdivisions of the Diptera, and looked for ace-1 and ace-2 by systematic PCR screening to determine which taxonomic groups within the Diptera have this gene change. We show that this loss probably extends to all true flies (or Cyclorrhapha), a large monophyletic group of the Diptera. We also show that ace-2 plays a non-detectable role in the synaptic AChE in a lower Diptera species, suggesting that it has non-synaptic functions. A relative molecular evolution rate test showed that the intensity of purifying selection on ace-2 sequences is constant across the Diptera, irrespective of the presence or absence of ace-1, confirming the evolutionary importance of non-synaptic functions for this gene. We discuss the evolutionary scenarios for the takeover of ace-2 and the loss of ace-1, taking into account our limited knowledge of non-synaptic functions of ace genes and some specific adaptations of true flies.
Journal of Insect Science, 2010
The genus Pseudonapomyza (Diptera: Agromyzidae) includes the main leafminer pests for monocots. T... more The genus Pseudonapomyza (Diptera: Agromyzidae) includes the main leafminer pests for monocots. Three new species are described that were captured using Malaise traps in "Tinença de Benifassà", "Font Roja" and "Lagunas de La Mata-Torrevieja" (Spain) Natural Parks: Pseudonapomyza curvata n. sp., P. longitata n. sp., and P. sicicornis n. sp. Systematics. Ecological data are discussed.
Public Economics Working Paper Series, Feb 1, 1998
This paper explores the link between the measurement of intergenerational mobility and the notion... more This paper explores the link between the measurement of intergenerational mobility and the notion of equality of opportunity. We show how recently proposed theories of equality of opportunity can be meaningfully adapted to the intergenerational context. This throws a new light on the interpretation of existing mobility measures: these may be interesting to measure mobility as movement, but they are inadequate to capture the notion of equality of opportunity. We propose some new mobility measures, which start from the idea that the intergenerational transition matrix gives useful information about the opportunity sets of the children of different social classes. These measures are used in an empirical illustration to evaluate the degree of inequality of opportunity in the US, Great Britain and Italy.
Economica, 2001
We axiomatize three different motivations for being concerned about intergenerational mobility: m... more We axiomatize three different motivations for being concerned about intergenerational mobility: mobility as a description of movement, as an indication of equality of opportunity, and as an indication of equality of life chances. These three motivations are shown to be incompatible. None of the existing measures is acceptable as an indicator of equality of opportunity or equality of life chances. We propose two new measures of intergenerational mobility which more adequately reflect these concerns.
Public Economics Working …, 1998
This paper explores the link between the measurement of intergenerational mobility and the notion... more This paper explores the link between the measurement of intergenerational mobility and the notion of equality of opportunity. We show how recently proposed theories of equality of opportunity can be meaningfully adapted to the intergenerational context. This throws a new light on ...
Biodiversity Data Journal, 2015
más importantes para el control de la producción, dado que de una línea de fabricación equilibrad... more más importantes para el control de la producción, dado que de una línea de fabricación equilibrada depende la optimización de ciertas variables que afectan la productividad de un proceso, variables tales como los son los inventarios de producto en proceso, los tiempos de fabricación y las entregas parciales de producción.
Teaching Documents by Michel Martinez
más importantes para el control de la producción, dado que de una línea de fabricación equilibrad... more más importantes para el control de la producción, dado que de una línea de fabricación equilibrada depende la optimización de ciertas variables que afectan la productividad de un proceso, variables tales como los son los inventarios de producto en proceso, los tiempos de fabricación y las entregas parciales de producción.
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Papers by Michel Martinez
Teaching Documents by Michel Martinez