03426nas a2200241   4500008004100000245012700041210007000168260001200238300001400250490000700264520257200271653002502843653002402868653002002892653001702912100003702929700003202966700002902998700003103027700003103058700002603089856006903115       2019                        eng d00aVariabilidad genética poblacional de la trucha Yaqui (Oncorhynchus sp.) en la región de Mesa Tres Ríos, Sonora, México0 aVariabilidad genética poblacional de la trucha Yaqui Oncorhynchu  c2019///  a134 - 1420 v213 aLa trucha Yaqui pertenece a un grupo de truchas nativas no descritas del género Oncorhynchus del Noroeste de México. Estudios morfológicos y moleculares postulan a la trucha Yaqui como una nueva especie exclusiva para las cuencas de los ríos Yaqui, Mayo y Casas Grandes y, evolutivamente muy cercana a la trucha arcoíris, Oncorhynchus mykiss. El conocimiento de su historia natural es escaso. Se estudió la variabilidad genética poblacional y su estatus de conservación en su distribución en Sonora en la región de Mesa Tres Ríos. Se muestrearon seis arroyos de aguas frías (localidades) en la región de Mesa Tres Ríos en dos vertientes geográficas en la búsqueda de estructura genética poblacional. Se analizaron 61 secuencias completas de la región control del ADN mitocondrial. Se obtuvieron nueve haplotipos, tres de ellos se encontraron en ambas vertientes de las localidades del área estudiada. Los resultados mostraron una baja diferenciación genética poblacional (Fst = 0.08035) y un moderado número de migrantes por generación (Nem = 5.72), que resulta en una falta de estructura poblacional y sustenta la hipótesis de una sola población de trucha Yaqui en las vertientes muestreadas de la región de Mesa Tres Ríos, Sonora.Yaqui trout belongs to a group of undescribed native trouts of the Oncorhynchus genus in the Northwest Mexico. Morphological  and  molecular  studies  postulate  the  Yaqui  trout as a new species exclusively inhabiting the Yaqui, Mayo and Casas Grandes rivers basins, and with a very close evolu-tionary relationship to the rainbow trout, Oncorhynchus my-kiss. Knowledge of its natural history is scarce. We studied the population genetic variability and its conservation status in its distribution in Sonora in the Mesa Tres Ríos region. Six cold water streams (localities) were sampled in the Mesa Tres Ríos region in two geographic slopes in the search for population genetic  structure.  We  analyzed  61  complete  sequences  of  the mitochondrial DNA control region. Nine haplotypes were obtained, three of them found in both slopes of the localities in the studied area. Results showed a low population genetic differentiation  (Fst  =  0.08035),  and  a  moderate  number  of  migrants per generation (Nem = 5.72), which results in a lack of  population  structure,  and  supports  the  hypothesis  of  a  single  population  of  Yaqui  trout  in  the  sampled  watersheds  from the Mesa Tres Ríos region, Sonora.Keywords:  Control  region,  Genetic  structure,  Yaqui  trout,  Northwest Mexico
10aEstructura genética10aNoroeste de México10aRegión control10atrucha Yaqui1 aBallesteros-Córdova, Carlos, A.1 aVarela-Romero, Alejandro, V1 aGrijalva-Chon, José, M.1 aCastillo-Gámez, Reyna, A.1 aCamarena-Rosales, Faustino1 aRuiz-Campos, Gorgonio  uhttp://biotecnia.unison.mx/index.php/biotecnia/article/view/104502486nas a2200277   4500008004100000020001400041245023500055210006900290260001600359490000700375520144000382653001901822653001001841653001201851653001001863653003201873653002201905100003301927700002601960700002701986700002202013700003902035700003102074700002702105856007602132       2021                        eng d  a1723-863300aDaily, seasonal, and annual variability of temperature in streams inhabited by the endemic San Pedro Martir trout (Oncorhynchus mykiss nelsoni), in Baja California, Mexico, and the predicted temperature for the years 2025 and 20500 aDaily seasonal and annual variability of temperature in streams   c2021/05/25/0 v803 aThe present study measured the daily, seasonal, and annual variability of the water temperature of streams in which the endemic rainbow trout, Oncorhynchus mykiss nelsoni, is distributed on the western slope of the Sierra San Pedro Mártir, Baja California, Mexico, between 1996 and 2019. The seasonal thermal interval and daily duration of summer temperatures above the thermal threshold for this trout subspecies (≥ 28°C) were determined in streams at different elevations (553, 1,220, and 2,080 masl, or meters above sea level). Temperatures ≥ 28°C were recorded at the study site on the stream with the lowest elevation (San Antonio de Murillos Creek) over an accumulated 365 h between June and September 2014, with the maximum temperature recorded there, 30.66 °C, making it the site most vulnerable to climate change. At the San Antonio de Murillos Creek, the average water temperature predicted by three models (GFDL R30, HadCM3, and Mote) for the year 2025 would be a non-lethal temperature, < 28 °C, for trout at a minimum elevation of 491-511 masl, while this was predicted to be 545-701 masl for the year 2050. Predicted hourly water temperatures of 28°C (non-lethal) may occur at minimum elevations of 868-898 masl in 2025 and at 908-1028 masl in 2050, reducing a 21-23% and 23-31% its current altitudinal distribution range, respectively, thus avoiding its presence at the type locality (San Antonio de Murillos).10aclimate change10acreek10aendemic10amodel10aOncorhynchus mykiss nelsoni10awater temperature1 aMeza-Matty, Iván, Alejandro1 aRuiz-Campos, Gorgonio1 aDaesslé, Luis, Walter1 aRuiz-Luna, Arturo1 aLópez-Lambraño, Álvaro, Alberto1 aCamarena-Rosales, Faustino1 aMatthews, Kathleen, R.  uhttps://www.jlimnol.it/index.php/jlimnol/article/view/jlimnol.2021.200102887nas a2200193   4500008004100000020002500041245014600066210006900212260001600281520213700297100003602434700002302470700003202493700002102525700003102546700003602577700002402613856005602637       2020                        eng d  a0378-1909, 1573-513300aFirst steps towards the identification of evolutionarily significant units in Mexican native trout: An assessment of microsatellite variation0 aFirst steps towards the identification of evolutionarily signifi  c2020/05/15/3 aIn the remote high-elevation streams and rivers in the northwest of Mexico, there is an endemic and highly diverse group of native trout related to the rainbow trout lineage (Oncorhynchus mykiss). Currently, only two species have been formally described from this trout complex, the Mexican golden trout, O. chrysogaster, and the San Pedro Mártir rainbow trout, O. m. nelsoni, but only the former occurs in the Sierra Madre Occidental (SMO). South and north of the O. chrysogaster range, there are other undescribed trout that have been recently discovered. Given the various human impacts on aquatic systems occupied by these Mexican native trout, the lack of taxonomic descriptions and the imminent risk of losing populations without their even being documented, we sought to infer a hierarchical population structure of the Mexican native trout, determine the geographic patterns of genetic diversity and gene flow among them, and identify evolutionarily significant units for a prompt conservation strategy. The allelic diversity across eleven microsatellite loci was used to assess genetic divergences of wild trout collected throughout its range in Mexico. Our results reject the old hypothesis that many of the trout in Mexico are introduced or translocated hatcheryreared rainbow trout and strongly support the new hypothesis of distinct genetic populations and lineages in the northwest of Mexico. According to the different statistical analysis of the genetic data, we distinguish between species and subspecies (O. chrysogaster, O. mykiss, and O. m. nelsoni) of the other regional lineages of undescribed trout (northern and southern) inhabiting the SMO. We also found a strong genetic substructure within these large clusters. We propose the presence of seven Evolutionarily Significant Units in the drainage basins of the SMO (two occur in the northern region, four in the southern, and one for the area of distribution of O. chrysogaster) and one in northwestern Baja California. Based in microsatellite data a minimum gene flow among populations is evidenced, resulting the presence the highly divergent populations.1 aDe León, Francisco, J. García1 aDillman, Casey, B.1 aCamarillo, Anna, Belia De L1 aGeorge, Anna, L.1 aCamarena-Rosales, Faustino1 aBarriga-Sosa, Irene, De Los Ang1 aMayden, Richard, L.  uhttp://link.springer.com/10.1007/s10641-020-00979-4