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Genetic Diversity of the Endemic Xantus’ Hummingbird Using 16 Novel Polymorphic Microsatellite Loci, and Their Cross Amplification between Six Related Species

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Open Journal of Genetics 2016年第1期6卷 19-27页

作者： cristina gonzález-rubio sanvicente Ricardo Rodríguez-Estrella Oscar Adrián Lozano-Garza Francisco J. García-De-León Laboratorio de Genética para la Conservación Centro de Investigaciones Biológicas del Noroeste La Paz Mexico Laboratorio de Análisis Espacial Ecología y Conservación Centro de Investigaciones Biológicas del Noroeste La Paz Mexico

A set of 16 microsatellite loci was developed and characterized for the Xantus’ hummingbird (Hylocharis xantusii) by using 454 next-generation sequencing. Twenty-five H. xantusii samples from one population were genotyped;all loci were polymorphic, with the number of alleles ranging from three to ten. The mean observed heterozygosity was 0.681 for all loci. No significant linkage disequilibrium was detected, but five loci (Hxan05, 06, 09, 13 and 14) showed deviation from Hardy-Weinberg equilibrium. These microsatellite loci are the first to be characterized for H. xantusii. A moderate to high level of cross-species amplification was observed across the six hummingbird species (31% - 87.5%), with the best cross amplification results observed in the closest related species (H. leucotis, Cynanthus latirostris, Calypte costae). The availability of these molecular tools allows assessing questions integrating population genetics, ecology, conservation, and evolutionary history for H. xantusii and for other phyogenetically related species.

关键词： Baja California Peninsula Hylocharis xantusii Microsatellites Pyrosequencing Cross-Species Amplification

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Segregated Distribution of Liriope tetraphylla, Aglaura hemistoma and Nausithoe punctata (Cnidaria) in the Southern Gulf of Mexico

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Open Journal of Ecology 2016年第9期6卷 568-578页

作者： César Flores-Coto Alejandro Puente-Tapia Laura sanvicente Añorve Mariana Fernández-Alamo Instituto de Ciencias del Mar y Limnología Universidad Nacional Autónoma de México Ciudad Universitaria México D.F. Mexico Facultad de Ciencias Universidad Nacional Autónoma de México Ciudad Universitaria México D.F. Mexico

In order to study the segregated distribution of the three most abundant jellyfish species in the southern Gulf of Mexico, a total of 85 stations were sampled during an oceanographic cruise from 19 May to 18 June 2006. Trawling took place from surface to a maximum depth of 200 m, using a Bongo net with a 61 cm mouth diameter and 333 and 500 μm mesh sizes. Temperature and salinity were recorded. Samples were preserved in 4% formalin, neutralized with sodium borate, and changed to 70% ethylic alcohol after 24 hours for conservation. The jellyfish data were standardized to 100 m3 of filtered water. A total of 10,610 jellyfish were collected from the 333 μm mesh size net, of which eight species represented 88.49% of the total density: Aglaura hemistoma, Liriope tetraphylla, Nausithoe punctata, Clytia hemisphaerica, Persa incolorata, Obelia spp., Clytia folleata and Eutima gracilis. The former three species are the subject of this study. The results obtained indicate that the high density areas of these three species have a segregated distribution. Segregation values (White’s index) recorded between pairs of specie were very high: L. tetraphylla - A. hemistoma, 0.88;L. tetraphylla - N. punctata, 0.86 and A. hemistoma - N. punctata, 0.84. The spatial distribution of the high density areas of these species fits well with the three hydrodynamically different areas: A. hemistoma in Campeche Bank, L. tetraphylla on the Campeche and Tabasco shelves and N. punctata in Campeche Bay. This spatial distribution pattern corresponds to their main habitat and reproductive habits of the species, as well as the influence of the hydrodynamics that dominate each area.

关键词： Cnidarians Segregated Distribution Southern Gulf Mexico

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Immigration of Post Larvae of Penaeid Shrimp to Terminos Lagoon,Campeche,Mexico:2013 Annual Cycle

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Open Journal of Ecology 2018年第9期8卷 522-535页

作者： Cesar Flores-Coto Daniel Embriz-Alba Mario Alejandro Gomez-Ponce Juana Lopez-Martinez Laura sanvicente-Anorve Instituto de Ciencias del Mar y Limnologìa Universidad Nacional autonoma de MexicoMexico CityMexico Centro de Investigaciones Biologicas del Noroeste S.C. GuaymasMexico

Immigration density magnitude and entry sizes of shrimp postlarvae to Terminos Lagoon were analyzed through sixteen fortnightly sampling from March to November in 2013, in three levels in the deepest channel of the Puerto Real inlet. Trapezium nets were used with 1.5 m length, 50 cm mouth diameter and 505 μm mesh, during each sampling 12 casts of 15 minutes/each were made. It was determined the presence of two species Litopenaeus setiferus and Farfantepenaeus duorarum, with total densities of 41.284 and 37.558 Pls 100 m-3 respectively. The annual cycle of immigration of postlarvae was very similar for both species, with a clear pattern of immigration throughout the year, linked to climatic variation, with the highest densities (88%) during rainy season. There were two periods of maximum density, related to the periods of greatest reproduction of these species. The density variation among cast reflects the presence of at least two and probably more postlarvae banks, located some closer than others to the mouth of the lagoon and with different densities in them. The average sizes of the two species were 7.9 mm total length of L. setiferus and 9.0 mm of F. duorarum. The differences in income sizes of both species seem to indicate the habitat preference of adult populations, L. setiferus occurring in more coastal areas than F. duorarum. Considering the variation in density and sizes throughout each sampling period, it is evident that the larvae on the banks belong to different cohorts and that have coincided in their location in front of the mouth.

关键词： Shrimp Immigration Magnitude Sizes

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