02359nas a2200169   4500008004100000020002500041245015000066210006900216260001600285520171100301100002402012700002702036700002202063700001802085700002902103856005702132       2021                        eng d  a1566-0621, 1572-973700aPopulation genetics and species distribution modeling highlight conservation needs of the endemic trout from the Northern Sierra Madre Occidental0 aPopulation genetics and species distribution modeling highlight   c2021/06/23/3 aRecent climatic conditions are afecting biodiversity, particularly those species highly isolated and at their distribution limits such as trout (Oncorhynchus sp.) inhabiting the Northern Sierra Madre Occidental (NSMO) in Mexico, which is a current conservation concern due to their fragmented distribution and anthropogenic threads. Here, we compiled previously published data from 24 microsatellite loci from multiple localities of trout throughout the NSMO to construct geographic genetic structuring hypotheses. Our results confrm two genetically distinct subgroups within the NSMO corresponding to  the northern populations from Río Yaqui-Río Bavispe and Río Casas Grandes, and the southern population from Río Yaqui- Río Sirupa and Río Conchos. In addition, we found a strong genetic diferentiation between most of the locations sampled.  We assembled species distribution models (SDM) to estimate the current distribution of trout. The SDM show that suitable environmental conditions may exist between northern and southern populations but are highly fragmented. In addition, association analyzes between FST and environmental factors show that the minimum temperature of the coldest month, the precipitation of wettest month, and the compound topographic index were responsible for the genetic structure. These results along with the limited mobility of the species, support limited connectivity as a possible explanation for current north and south arrangement of diversity. This study provides deep insights into the ecology and divergence processes within Northern Sierra Madre Occidental trout, and for the urgent development of efective conservation strategies for each of those lineages.1 aAbadía-Cardoso, A.1 aHernández-Guzmán, R.1 aVarela-Romero, A.1 aGarza, J., C.1 aDe León, F., J. García  uhttps://link.springer.com/10.1007/s10592-021-01388-502486nas 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.2021.2001