The Research Network on Amazonian Ichthyofauna

Darias, María J.; Amadio, Sidinéia; Rosenthal, H.

doi:10.1111/jai.12986

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…The Amazon basin is home to the largest biodiversity of freshwater fish in the world, there are about 2300 recognized species, corresponding to more than 15% all of the freshwater fish species described on the planet [ 29 ], not counting the new ones that are described annually. However, all this aquatic biodiversity is under strong threat due to deforestation, construction of dams and navigable waterways, pollution and overfishing [ 30 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

Novel Microsatellite Markers Used for Determining Genetic Diversity and Tracing of Wild and Farmed Populations of the Amazonian Giant Fish Arapaima gigas

Gomes

Aguiar

Marques

et al. 2021

Genes

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The Amazonian symbol fish Arapaima gigas is the only living representative of the Arapamidae family. Environmental pressures and illegal fishing threaten the species’ survival. To protect wild populations, a national regulation must be developed for the management of A. gigas throughout the Amazon basin. Moreover, the reproductive genetic management and recruitment of additional founders by aquaculture farms are needed to mitigate the damage caused by domestication. To contribute to the sustainable development, we investigated the genetic diversity of wild and cultivated populations of A. gigas and developed a panel composed by 12 microsatellite markers for individual and population genetic tracing. We analyzed 368 samples from three wild and four farmed populations. The results revealed low rates of genetic diversity in all populations, loss of genetic diversity and high inbreeding rates in farmed populations, and genetic structuring among wild and farmed populations. Genetic tracing using the 12 microsatellite markers was effective, and presented a better performance in identifying samples at the population level. The 12-microsatellite panel is appliable to the legal aspects of the trade of the A. gigas, such as origin discrimination, reproductive genetic management by DNA profiling, and evaluation and monitoring of genetic diversity.

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Section: Discussionmentioning

confidence: 99%