SGER: Biodiversity of Native Mexican Trout (Genus Oncorhynchus spp.) and The Impending Treat of Their Demise by The Exotic Rainbow Trout O. mykiss gairdneri (Teleostei: Salmonidae)

SGER：墨西哥本地鳟鱼（Oncorhynchus spp.）的生物多样性以及外来虹鳟 O. mykiss gairdneri（Teleostei：鲑鱼科）即将面临的灭亡

• 批准号: 0240184
• 负责人: Richard Mayden
• 金额: $ 7.37万
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-10-01 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0240184&HistoricalAwards=false
• 关键词: SGER; Biodiversity; Native; Mexican; Trout

A grant has been awarded to Dr. Richard L. Mayden at Saint Louis University to conduct field and laboratory research in collaboration with other USA scientists and several scientists from Mexico on the environmental status, distribution, conservation and genetics of native trout populations of Mexico. While biologists have been aware of the existence of native trout in Mexico for over a century, they have received little study. Beginning in the mid-1990's a group of ichthyologists and conservation biologists from both Mexico and USA jointly formed an international alliance, Truchas Mexicanas, to better understand the native trout of the Sierra Madre Occidental. Through these efforts, scientists have discovered previously unknown trout species restricted to Mexico and introduced (non-native) populations of rainbow trout. The existence of these non-native rainbow trout originating from streams in the US and Canada in the ranges of the unique Mexican trout species is a significant threat to the future existence of native species. Rainbow trout are known to displace native trout species through competition or genetically "swamp out" their gene pools through aggressive hybridization. Other native populations of trout are also predicted to occur in the upper Rio Conchos; these populations are predicted to also be in danger from habitat destruction and introductions of rainbow trout. In this study we will inventory many river systems of the sierras for native and introduced trout species, including the upper Conchos River system. Genetic samples will be examined from all of these populations to evaluate genetic variability of native species and determine if any native populations are compromised genetically through hybridization with introduced rainbow trout. This research supports the development of an international alliance investigating native trout populations of Mexico and southwestern United States. Trout species are important game and forage species for human populations, constituting a major element of diets in some regions. Trout fisheries are also very important economic elements to some regions as trout are highly prized sport fish species. Understanding native trout species diversity in Mexico and its conservation and maintenance in these streams has a major impact on both fisheries and economic areas. Mexican trout species are the southern-most trout and are adapted to theses unique ecosystems. Introductions of non-native rainbow trouts will seriously jeopardize these adapted populations and lead to their extirpation from the region. This will have serious sociological and economic impacts for the native people of the region.

圣路易斯大学的理查德·L·梅登博士获得了一笔资助，与其他美国科学家和几位墨西哥科学家合作，对墨西哥本土鳟鱼种群的环境状况、分布、保护和遗传学进行实地和实验室研究。尽管生物学家在一个多世纪前就知道墨西哥本土鳟鱼的存在，但对其进行的研究却很少。从 1990 年代中期开始，一群来自墨西哥和美国的鱼类学家和保护生物学家联合成立了一个国际联盟 Truchas Mexicanas，以更好地了解西马德雷山脉的本地鳟鱼。 通过这些努力，科学家们发现了以前未知的仅限于墨西哥的鳟鱼物种，并引入了（非本地）虹鳟鱼种群。 这些来自美国和加拿大溪流的非本地虹鳟鱼的存在，存在于独特的墨西哥鳟鱼物种范围内，对本地物种的未来存在构成重大威胁。 众所周知，虹鳟鱼会通过竞争取代本地鳟鱼物种，或者通过积极的杂交从基因上“淹没”它们的基因库。 预计其他本地鳟鱼种群也会出现在康乔斯河上游。预计这些种群也将面临栖息地破坏和虹鳟鱼引入的危险。 在这项研究中，我们将清点山脉的许多河流系统中本地和引进的鳟鱼物种，包括康乔斯河上游系统。 将对所有这些种群的遗传样本进行检查，以评估本地物种的遗传变异性，并确定是否有任何本地种群因与引入的虹鳟鱼杂交而受到遗传损害。 这项研究支持建立一个调查墨西哥和美国西南部本地鳟鱼种群的国际联盟。 鳟鱼物种是人类重要的猎物和饲料物种，构成一些地区饮食的主要组成部分。 鳟鱼渔业对一些地区来说也是非常重要的经济要素，因为鳟鱼是非常珍贵的运动鱼类。 了解墨西哥本土鳟鱼物种多样性及其在这些溪流中的保护和维护对渔业和经济领域都有重大影响。 墨西哥鳟鱼是最南端的鳟鱼，适应这些独特的生态系统。 非本地虹鳟鱼的引入将严重危害这些适应的种群，并导致它们从该地区灭绝。 这将对该地区的原住民产生严重的社会和经济影响。