A INTRODUÇÃO DO GÊNERO Cichla [BLOCK E SCHNEIDER, 1801] NA PLANÍCIE DE INUNDAÇÃO DO ALTO RIO PARANÁ

Gasques, Luciano Seraphim; Fabrin, Thomaz Mansini Carrenho; Prioli, Sônia Maria Alves Pinto; Prioli, Alberto José

doi:10.25110/arqvet.v17i4.2014.5027

Cited by 4 publications

(7 citation statements)

References 26 publications

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“…Introgressive hybridization is common among fish and has been documented for Cichlids (Genner & Turner, 2012; Keller et al, 2012; Meier et al, 2016; Meyer, Matschiner, & Salzburger, 2017; Salzburger, Baric, & Sturmbauer, 2002). Hybridization has already been reported in Cichla (Brinn et al, 2004) even outside its natural range (Gasques, 2013; Oliveira et al, 2006). Anthropogenic interventions such as species introductions contribute to disrupt isolation mechanisms, favoring hybridization (Scribner et al, 2001), especially among species with great genetic similarity, as C. kelberi and C. monoculus .…”

Section: Discussionmentioning

confidence: 86%

“…Once the invasion occurred, introgression might produce novel forms that are subject to natural selection, promoting rapid and consistent evolutionary changes (Mallet, 2005). Excepting the study of Gasques (2013) on a regulated floodplain, no other explored the possibility of hybridization between C. monoculus and C. kelberi . Therefore, this study is a pioneer in performing a nuclear DNA analysis and in investigating Cichla hybridization in altered ecosystems.…”

Section: Discussionmentioning

confidence: 99%

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Genomic markers confirm introgressive hybridization in Cichla (Teleostei) in an invaded coastal system

Diamante

Oliveira

Petry

et al. 2020

Internat Rev Hydrobiol

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Hybridization seems frequent among Cichla species (peacock bass), as studies have reported hybrids in populations within and outside their natural range (the Amazon and Orinoco river basins). Cichla kelberi and C. monoculus were introduced to the São João river (Southeast Brazil) more than 20 years ago, where they successfully colonized different environments. In this system, specimens have coloration and morphology that differ from patterns observed in their native range, indicating that the contact between C. monoculus and C. kelberi eliminated reproductive isolation, leading to introgressive hybridization. In this context, we used the LWS and dlx2 genes and the random amplified polymorphic DNA technique to characterize Cichla species in the São João river and to detect possible hybridization processes. The genetic markers identified here showed mismatches between mitochondrial and nuclear DNA in C. monoculus and C. kelberi, sampled both in the reservoir and in the estuarine stretch. Fragments of nuclear DNA from both species, as well as the presence of mitochondrial DNA from one species associated with the nuclear genome of the other, provide strong evidence of hybridization associated with bidirectional genetic introgression. Because hybrids may be more resistant, competitive, and aggressive than their parental species, these invaders may pose a significant threat to native biodiversity in this and other coastal rivers of the region.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Genomic markers confirm introgressive hybridization in Cichla (Teleostei) in an invaded coastal system

Diamante

Oliveira

Petry

et al. 2020

Internat Rev Hydrobiol

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“…However, the set of loci analyzed showed high I value (0.010) and low Q value (0.436). In addition, fish dispersal strategies and life-history traits contribute to the effects of genetic variation (Pilger, Gido, Propst, Whitney, & Turner, 2017) and for C. piquiti, there is naturally low gene flow, due to its territorial and sedentary behavior (Gasques et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Assessing the genetic structure and the low genetic diversity in C. piquiti and high monomorphism in the transferred loci in C. kelberi highlights the existence of mechanisms leading to the homozygosity of individuals for these loci, which requires further studies since this is a native species of Serra da Mesa flooding region (Gasques et al, 2014). Besides, information regarding the genetic variability of these species, degree of inbreeding, or genetic linkage is essential for establishing management actions for fishing and even control of the populations of C. kelberi and C. piquiti.…”

Section: Discussionmentioning

confidence: 99%

“…The genus Cichla Block and Schneider, 1801 represents one of the main groups of piscivorous fish of the Cichlidae family in South America (Goldstein, 1973;Willis et al, 2015). These species are popularly known in Brazil as peacock basses (Tucunaré) and come from the Amazon and the Tocantins-Araguaia River basins and are widely introduced in the basins of the Paraná, Paraguai, Paraíba do Sul and Paraguaçú rivers (Gasques, Fabrin, Gonçalves, Prioli, & Prioli, 2014). Unlike most Amazonian fish, peacock basses are sedentary and diurnal, and they chase prey until successful capture.…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity in Cichla piquiti and cross-amplification for Cichla kelberi in the Serra da Mesa reservoir, Goiás, Brazil

Faquim

Ferreira²,

Castro³

et al. 2022

Acta Sci. Biol. Sci.

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Species Cichla piquiti and Cichla kelberi are found in the Serra da Mesa reservoir, Goiás and are sedentary with diurnal habits. This study aimed to evaluate the magnitude and distribution of genetic variability in subpopulations of C. piquiti with specific microsatellite loci and to test transferability in other microsatellite markers for C. kelberi. We analyzed 99 individuals of C. piquiti from seven points to evaluate genetic diversity and structure with 10 microsatellite loci. Transferability of 75 loci was tested in C. kelberi to increase microsatellite markers available. Genetic structure was assessed with Bayesian clustering. Global FST for C. piquiti was weak (0.056), but FIS (0.598) and FIT (0.621) were significantly high, indicating that the mating system has a strong influence on the organization of genetic variability with most mating among related. Two genetic groups were evidenced with most individuals allocated to a single group. Transferability of microsatellite loci for C. kelberi had low polymorphism. The level of genetic diversity was low, increasing inbreeding and suggesting that few individuals of C. piquiti colonized the reservoir during its installation due founder effect. Other factors as reproductive behavior and overfishing can act to decrease genetic diversity. Therefore, we reinforce the need for genetic monitoring to avoid loss of genetic diversity that can be intensified both construction of hydropower plants and ecological and reproductive aspects in some fish species.

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Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil

Bertaco

Azevedo

2023

Pap. Avulsos Zool.

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The present study catalogues exotic and allochthonous fish species found in the three main freshwater river drainages of Rio Grande do Sul State using records of scientific collections and literature, and discusses the main impacts caused by their introduction in natural environments. Ten exotic species are found in the area, i.e., Clarias gariepinus, Coptodon rendalli, Ctenopharyngodon idella, Cyprinus carpio, Hypophthalmichthys molitrix, Hypophthalmichthys nobilis, Ictalurus punctatus, Micropterus salmoides, Oncorhynchus mykiss and Oreochromis niloticus, belonging to five orders, nine genera and seven families. These fishes are native from African, Asian, European and North American countries. The eight allochthonous species, i.e., Acestrorhynchus pantaneiro, Hoplerythrinus unitaeniatus, Hoplias lacerdae, Megaleporinus macrocephalus, Piaractus mesopotamicus, Pachyurus bonariensis, Serrasalmus maculatus, and Trachelyopterus lucenai, belong to three orders, eight genera, and six families, are native from the Río La Plata basin, that includes the Río Uruguay, and have been all registered in the Laguna dos Patos. Two of these species are further recorded in the Rio Tramandaí system (A. pantaneiro and T. lucenai). The study also presentes a brief history of the first records of exotic species in the state and in the country, and their main vectors of introduction. According to the records of exotic species in scientific collections, the two exotic species with the highest number of records in the country are tilapias Coptodon rendalii (508 records) and Oreochromis niloticus (376 records), and most records occurred in the last two decades. The two carps Cyprinus carpio and Ctenopharyngodon idella are the only exotic species recorded in the three main drainage basins of the state. In addition, we warn about the importance of studies about the biology and negative impacts of exotic species over native species on the understanding of management in wild environments.

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A INTRODUÇÃO DO GÊNERO Cichla [BLOCK E SCHNEIDER, 1801] NA PLANÍCIE DE INUNDAÇÃO DO ALTO RIO PARANÁ

Cited by 4 publications

References 26 publications

Genomic markers confirm introgressive hybridization in Cichla (Teleostei) in an invaded coastal system

Genomic markers confirm introgressive hybridization in Cichla (Teleostei) in an invaded coastal system

Genetic diversity in Cichla piquiti and cross-amplification for Cichla kelberi in the Serra da Mesa reservoir, Goiás, Brazil

Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil

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