02919nam a2200145 4500008004100000020002200041245006600063210006600129260009000195300000800285520235900293653001802652100002602670856007702696 2012 eng d a978-607-7908-65-400aCatálogo de los Peces Dulceacuícolas de Baja California Sur0 aCatálogo de los Peces Dulceacuícolas de Baja California Sur aD.F., MéxicobInstituto Nacional de Ecología (INE-Semarnat), México, D.F.c2012/// a1693 a

A pesar de que Baja California Sur (BCS) es tipificada como una regiónárida y con pocas corrientes epicontinentales en sus vertientes Pacífico y Golfo de California (Tamayo, 1962), existen numerosos cuerpos de agua perennes conocidos como “oasis” que representan eocosistemas mesófilos relictos de afinidad subtropical (Axelrod, 1948, 1979; Grismer y McGuire, 1993). Estos oasis son habitados por peces con diferentes historias biogeográficas y evolutivas, siendo escenarios de endemismos autóctonos (Fundulus lima y Gobiesox juniperoserrai) o de colonización vía fluvial por especies eurihalinas de estirpe marina (Follett, 1960; Espinosa Pérez y Castro-Aguirre, 1996; Ruiz-Campos et al., 2003). En términos ecogeográficos, no hay peces dulceacuícolas de origen primario o secundario en BCS (Follett, 1960) y varios factores causales han sido propuestos para explicar tal situación: (1) discontinuidad paleohidrológica entre los arroyos del sur de California y de la península de Baja California durante la disminución del nivel del mar en el Pleistoceno tardío; (2) la prolongada aridez prevaleciente desde el inicio del Holoceno ha frenado la dispersión de peces por vía estuarina a través de la costa peninsular; (3) lo abrupto de gran parte de la costa oriental ha evitado la formación de lagunas y complicado la dispersión; y (4) el Golfo de California actúa como una barrera para la entrada de peces dulceacuícolas desde Mesoamérica. ● Peces dulceacuícolas de Baja California Sur Follett (1960) reportó 21 especies dulceacuícolas nativas para BCS, sin ningún caso de introducción de especies exóticas. Posteriormente, Ruiz-Campos y Contreras-Balderas (1987) incrementaron este número a 28, aportando primeros registros de tres especies periféricas esporádicas (Harengula thrissina, Hypsopsetta guttulata y Achirus mazatlanus) y tres exóticas (Gambusia affinis, Poecilia reticulata y Xiphophorus maculatus). Muchos de los registros referidos por ambos estudios fueron procedentes de las partes bajas de los ríos Muelegé y San José del Cabo, pero sin evidencia

10aMexican trout1 aRuiz-Campos, Gorgonio uhttp://www2.ine.gob.mx/publicaciones/consultaPublicacion.html?id_pub=65902085nas a2200337 4500008004100000245011300041210006900154260001200223300001200235490000700247520102100254653001401275653001201289653001701301653001501318653000901333653001801342653001701360653002401377653001801401653001501419653002201434100003101456700002601487700002301513700002401536700002601560700002901586700003601615856009601651 2008 eng d00aMitochondrial haplotype variation in wild trout populations (Teleostei: Salmonidae) from northwestern Mexico0 aMitochondrial haplotype variation in wild trout populations Tele c2008/// a33 - 450 v183 a

The variation and composition of Mexican wild trout mitochondrial DNA haplotypes throughout northwestern Mexico was determined by means of polymerase chain reaction-restriction fragment polymorphism analysis (PCR-RFLP), of one region of mitochondrial DNA between cytochrome b and the D-loop. This analysis was based on 261 specimens taken in 12 basins and four hatcheries from northwestern Mexico. From 23 haplotypes, 15 wild trout haplotypes were identified and classified in four groups: (1) one restricted to Nelson's trout (Oncorhynchus mykiss nelsoni), (2) four restricted to R¡o Mayo and R¡oYaqui trout (O. mykiss sspp.), (3) six to Mexican golden trout (O. chrysogaster) with two subgroups, and (4) one exclusive to R¡o Piaxtla trout. Distributions of native haplotypes broadly overlap the distribution of non-native hatchery rainbow trout reflecting the historical management of introductions of exotic rainbow trout and the artificial transference of these trout among basins.

10aChihuahua10aConchos10aCytochrome b10aendangered10aMayo10aMexican trout10aOncorhynchus10aOncorhynchus mykiss10arainbow trout10aSalmonidae10aTruchas Mexicanas1 aCamarena-Rosales, Faustino1 aRuiz-Campos, Gorgonio1 aRosa-Vélez, Jorge1 aMayden, Richard, L.1 aHendrickson, Dean, A.1 aVarela-Romero, Alejandro1 ade León, Francisco, J. García u⬚d:\users\dean_h\reprints in pdf or other\Camarena_2008_Mt_haplotype_Mexican_trout.pdf⬚03941nas a2200433 4500008004100000245010000041210006900141260001200210300001400222490001300236520260400249653002002853653001402873653001202887653001202899653002602911653002602937653001702963653001802980653001502998653002803013653001203041653001103053653002203064100002603086700002403112700001803136700001503154700002003169700001703189700001803206700001503224700002603239700002203265700002503287700001703312700003603329856014203365 2003 eng d00aMexican native trouts: a review of their history and current systematic and conservation status0 aMexican native trouts a review of their history and current syst c2003/// a273 - 3160 v12(2002)3 a

While biologists have been aware of the existence of native Mexican trouts for over a century, they have received little study. The few early studies that did much more than mention their existence began in the 1930s and continued into the early 1960s, focusing primarily on distributional surveys and taxonomic analyses. Starting in the 1980s the Baja California rainbow trout became the subject of more detailed studies, but very little remains known of mainland trouts of the Sierra Madre Occidental. We review earlier studies and report on our own collections and observations made between 1975 and 2000. We present newly discovered historical evidence that leads us to conclude that a ``lost'' cutthroat trout, a lineage not previously known from Mexico, was collected more than a century ago from headwaters of the R¡o Conchos (a major tributary of the Rio Grande (= R¡o Bravo)), a basin not previously considered to harbor a native trout. We review the last century of regional natural resource management and discuss our own observations of trout habitats. Impacts of logging, road building and overgrazing are widespread and expanding. Many streams suffer from heavy erosion, siltation and contamination, and though long-term hydrologic data are generally not available, there is evidence of decreased discharge in many streams. These problems appear related to region-wide land management practices as well as recent regional drought. Trout culture operations using exotic rainbow trout have rapidly proliferated throughout the region, threatening genetic introgression and/or competition with native forms and predation on them. Knowledge of distribution, abundance, relationships and taxonomy, not to mention ecology and population biology, of native trouts of the Sierra Madre Occidental remains inadequate. Vast areas of most mainland drainages are still unexplored by fish collectors, and even rudimentary information regarding basic biology, ecology and population structure of stocks remains lacking. Concentrated exploration, research and management of this long overlooked and undervalued resource are all urgently needed. The history of natural resources exploitation that placed so many native trouts of the western United States on threatened and endangered species lists is repeating itself in the Sierra Madre Occidental. Without concerted action and development of region-wide socio-economic solutions for current, largely non-sustainable resource management practices, native Mexican trout gene pools will soon be in grave danger of extinction.

10aBaja California10aChihuahua10aConchos10aDurango10agenetic introgression10aOnchorchynchus mykiss10aOnchorynchus10arainbow trout10aRio Grande10aSierra Madre Occidental10aSinaloa10aSonora10aTruchas Mexicanas1 aHendrickson, Dean, A.1 aEspinosa-Pérez, H.1 aFindley, L.T.1 aForbes, W.1 aTomelleri, J.R.1 aMayden, R.L.1 aNielsen, J.L.1 aJensen, B.1 aRuiz-Campos, Gorgonio1 aVarela-Romero, A.1 aVan Der Heiden, A.M.1 aCamarena, F.1 ade León, Francisco, J. García uhttps://truchasmexicanas.myspecies.info/content/mexican-native-trouts-review-their-history-and-current-systematic-and-conservation-status