Conservation genetics of the tropical gar (Atractosteus tropicus, Lepisosteidae)

Conservation genetics of the tropical gar (Atractosteus tropicus, Lepisosteidae)
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热带雀鳝(Atractosteus tropicus,Lepisosteidae)的保护遗传学

DOI:
10.1007/s10592-023-01509-2
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发表时间:
2023
影响因子:
2.2
通讯作者:
Voelker, Gary
Voelker, Gary
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Palacios Mejia, Maura;Arias-Rodriguez, Lenin;Arciniega, Martha;Rodríguez, Victoria;Barraza Sandoval, José Enrique;Herrera, Néstor;Marroquín Mora, Dora Carolina;Ulloa Rojas, Juan B.;Márquez Couturier, Gabriel;Voelker, Gary

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热带雀鳝 (Atractosteus tropicus) 是鳞雀科 (Lepisosteidae) 中最小的成员;然而,该物种在墨西哥和中美洲具有巨大的社会经济影响,传统上是为了商业和生存而​​收获。虽然热带雀鳝在整个自然范围内的自然种群数量一直在减少,但它也是一种新兴的水产养殖物种,在当地孵化场生产并在私人池塘中生长。 A.自然种群面临的压力增加。热带鱼及其在水产养殖生产中的日益增多给自然种群的管理和保护带来了潜在的冲突。在这里,我们调查了热带雀鳝种群的种群遗传结构,其中包括在墨西哥、萨尔瓦多和哥斯达黎加采样的 200 多个个体。利用11个微卫星位点,我们确定了三个具有不同地理分布的遗传簇,包括中美洲太平洋沿岸流域的一个簇、流入墨西哥湾的格里哈尔瓦和乌苏马辛塔河流域的一个簇、以及流入加勒比海的圣胡安河的一个簇。鉴于观察到的分歧程度,这些结果表明热带雀鳝体内可能存在重要的进化单位,需要单独的渔业和保护管理。我们还发现,来自墨西哥太平洋沿岸水产养殖设施的热带雀鳝源自大西洋斑鳝种群,这表明个体已经跨越生物地理边界易位。我们讨论了这种易位如何对热带雀鳝的自然种群结构产生负面影响,并为未来的研究和水产养殖实践提供建议。
The tropical gar (Atractosteus tropicus) is the smallest member of the family Lepisosteidae; yet this species has a large socioeconomic impact in México and Central America where it is traditionally harvested commercially and for subsistence. While natural populations of tropical gar have been dwindling throughout its natural range, it is also an emergent aquaculture species that is produced in local hatcheries and grown out in privately owned ponds. The increased pressure on natural populations ofA. tropicusand its increasing use in aquaculture production poses potential conflicts for the management and conservation of natural populations. Here, we investigated the population genetic structure of tropical gar populations, including over 200 individuals sampled in México, El Salvador, and Costa Rica. Using 11 microsatellite loci, we identified three genetic clusters with distinct geographic distributions, including a cluster in drainages along the Pacific versant of Central America, a cluster in the Grijalva and Usumacinta River basins that drain into the Gulf of México, and a cluster in the Río San Juan that drains into the Caribbean Sea. Given the degree of divergence observed, these results indicate the potential presence of evolutionary significant units within tropical gar that warrant separate fisheries and conservation management. We also found that tropical gar from an aquaculture facility along the Pacific versant of México were derived from Atlantic versant populations, indicating that individuals have already been translocated across biogeographic boundaries. We discuss how such translocations can negatively impact the natural population structure of tropical gar and provide recommendations for future research and aquaculture practices.
DOI: --
发表时间: 2000-05
期刊: Genetics
影响因子: 3.3
作者:
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通讯作者: J. K. Pritchard;Matthew Stephens;Peter Donnelly
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期刊: Scientific reports
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DOI: 10.1155/2012/780169
发表时间: 2012
期刊: International Journal of Evolutionary Biology
影响因子: --
作者:
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DOI: --
发表时间: 2013
期刊:
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作者:
Sandra Bohn;E. Barraza;Caleb D. McMahan;Wilfredo A. Matamoros;B. Kreiser
通讯作者: B. Kreiser
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发表时间: 2018
影响因子: 1.4
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