Genetic Diversity of Captive and Wild Threatened Catfish<i>Pseudoplatystoma corruscans</i>in the São Francisco River

Dantas, Hozana Leite; Neto, Miguel Arcanjo dos Santos; Oliveira, Karine Kelly Cavalcanti; Severi, William; Diniz, Fábio Mendonça; Coimbra, Maria Raquel Moura

doi:10.1080/10641262.2013.800787

Cited by 16 publications

(12 citation statements)

References 31 publications

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“…The average PIC observed in the ive microsatellite markers was 0.755, which indicates that these have high informational power and are effective as genetic markers in R. quelen populations. This value is consistent with those published by Ribolli and Zaniboni-Filho (2009) in a study of the same species (0.706), and by Dantas et al (2013) in studies of P. corruscans (0.80 and 0.699, respectively).…”

Section: Discussionsupporting

confidence: 92%

Genetic variability of captive populations of Rhamdia quelen (Teleostei: Pimelodidae) using microsatellite markers

et al. 2017

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A análise da variabilidade genética de populações a serem utilizadas em programas de melhoramento genético é importante para a seleção de uma população base, a qual maximize a divergência genética entre as populações selecionadas. Duas populações cativas de Rhamdia quelen foram analisadas com marcadores microssatélites. Para a amplificação dos loci foram utilizados os seguintes primers marcados com fluoróforos: Pcor1 (FAM), Pcor2 (TET), Pc17 (HEX), Pc97 (TET) e Rh1 (FAM). Os cinco loci de microssatélites analisados apresentaram-se altamente polimórficos e informativos, com uma média de 9,8 alelos/locus. O coeficiente de endogamia (FIS) apresentou valores negativos, evidenciando que não houve cruzamentos consanguíneos. O teste de diferenciação alélica e genotípica entre as duas populações foi estatisticamente significativo, e o valor de divergência genética total (FST) foi de 0,01939, indicando baixo nível de divergência genética nas populações. A análise de variância molecular (AMOVA) demonstrou que a maior variabilidade genética se encontra dentro das populações (98,06%). Os marcadores microssatélites utilizados foram eficientes para a análise da estrutura e variabilidade genética das populações cativas de Rhamdia quelen. O manejo reprodutivo adotado mostrou-se adequado, uma vez que garantiu a manutenção da variabilidade genética das populações.

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Section: Discussionsupporting

confidence: 92%

Genetic variability of captive populations of Rhamdia quelen (Teleostei: Pimelodidae) using microsatellite markers

et al. 2017

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“…Further research is also necessary to map the genetic diversity of wild anoa populations with larger sample sizes and compare it with the captive population. On the other hand, the genetic diversity of wild populations has been shown to differ from captive populations (Bailey et al 2007;Dantas et al 2013;Jiang et al 2005;Miller et al 2014). Unfortunately, due to continued habitat loss and poaching, the population size of anoa in their natural habitat is estimated to be rapidly declining (Arini et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Genetic Diversity of the Endangered Endemic Anoa (Bubalus spp): Implication for Conservation

et al. 2022

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Anoa is an endemic ungulate in Sulawesi and its status now is endangered because the population continues to decline. Conservation genetics is one of the crucial issues in the anoa conservation strategy and action plan 2013-2022 document, but this genetic data is not yet available. To investigate and provide valuable information for conservation genetics measures, thirteen polymorphic microsatellites were used to analyze 20 adult anoa. Anoa has relatively low genetic diversity within populations (HO = 0.58), and high genetic differentiation among populations (FST = 0157). Although the anoa population has a bottleneck signal (T.P.M: 0.019; P0.05), the bottleneck simulation results show that the loss of genetic diversity is being slow over the next 100 years (9.5%). We provide some recommendations for conservation genetics based on the findings in this paper, including monitoring and genetically mapping for other anoa populations due to bottleneck signals, establishing the founder of the ex-situ population by examining their genetic diversity status, maintaining and increasing the number of individuals in the ex-situ population to genetically safe population size, and managing anoa populations by avoiding inbreeding. In-situ and ex-situ conservation programs should be combined to maintain the genetic diversity of anoa.

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“…The São Francisco River covers 7.4% of Brazil and represents a large number of reservoirs, representing the second highest source of hydropower in the country [18]. The headwaters rise in the southern region of Minas Gerais state, and run through Bahia, Pernambuco, Sergipe and Alagoas states to then empty into the Atlantic Ocean.…”

Section: Biological Resources Of Water 250mentioning

confidence: 99%

“…As a result of its sloping profile and abundance of rapids, the Uruguay River is hard to navigate compared to other rivers. With faster water, there are a considerable number of hydropowered dams in the basin that can affect the reproduction of migratory species and their eggs and larvae drift [17].The São Francisco River covers 7.4% of Brazil and represents a large number of reservoirs, representing the second highest source of hydropower in the country [18]. The headwaters rise in the southern region of Minas Gerais state, and run through Bahia, Pernambuco, Sergipe and Alagoas states to then empty into the Atlantic Ocean.…”

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confidence: 99%

Genetic Applications in the Conservation of Neotropical Freshwater Fish

Mastrochirico-Filho¹,

Freitas²,

Ariede³

et al. 2018

Biological Resources of Water

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Neotropical fish correspond to approximately 30% of all fish species worldwide. The diversity of fish species found in Neotropical basins reflects variations in life-history strategies and exhibition of particular morphological, physiological and ecological attributes. These attributes are mainly related to different forms of feeding, life maintenance and reproduction. Today, fish populations are being threatened by anthropogenic actions that are having a visible impact on the natural state of continental aquatic ecosystems. The main causes are overfishing, non-native species introduction, reservoir-dam systems, mining, pollution and deforestation. The biology and population dynamics of the species are still unclear due to lack of research. Genetic tools can be useful resources for the conservation of Neotropical fish species in several ways. Molecular genetic markers are considered powerful tools to identify cryptic and hybrid fish and also allow the evaluation of the genetic variability and structure of populations of Neotropical ichthyofauna. Several analyses of molecular markers have been performed on Neotropical fish, including allozyme analysis, restriction fragment length polymorphisms in regions of DNA (RFLP), randomly amplified polymorphic DNA (AFLP), randomly amplified polymorphic DNA (RAPD), microsatellites, single nucleotide polymorphisms (SNPs) and mitochondrial DNA (mtDNA) markers. In order to analyse a high number of markers, next generation sequencing has allowed researchers to generate a large amount of genomic information that can be applied to the conservation of Neotropical fish.Keywords: molecular markers, genetic conservation, Neotropical ichthyofauna, overfishing, dam © 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Rivers of the Neotropical regionThe distribution of freshwater fish around the world was mediated by historical climatic and geological events at different time points. Today, each global region has distinct patterns of distribution due to physical barriers obstructing species dispersion, representing different tolerances to environmental variables [1]. The tropics of the American continent are well known for their high biodiversity. This is due to habitat heterogeneity and a complex geological history. The Neotropical region is a biogeographic region that comprises Central America (including the southern part of Mexico and the peninsula of Baja California), the south of Florida, the Caribbean and South America. The origin and evolution of the Neotropical region arose through a process of synergism between its fauna that experienced local rainfall variations and gradual climate change resulting in a mosaic of habitats controlled by river migrations, sea-level fluctuations, local dryness and local uplifts [2,3].Regional geo...

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Genetic Diversity of Captive and Wild Threatened CatfishPseudoplatystoma corruscansin the São Francisco River

Cited by 16 publications

References 31 publications

Genetic variability of captive populations of Rhamdia quelen (Teleostei: Pimelodidae) using microsatellite markers

Genetic variability of captive populations of Rhamdia quelen (Teleostei: Pimelodidae) using microsatellite markers

Genetic Diversity of the Endangered Endemic Anoa (Bubalus spp): Implication for Conservation

Genetic Applications in the Conservation of Neotropical Freshwater Fish

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