Consulta: subjectFacets:"Conservation genetics"
Registros recuperados: 23
Data/hora: 09/06/2024 04:48:15

The Influence of the Academic Conservation Biology Literature on Endangered Species Recovery Planning
Provedor de dados: Ecology and Society
Autores: Stinchcombe, John; Brown University; John_Stinchcombe@brown.edu; Moyle, Leonie C; Duke University, Biology Department; lcm6@duke.edu; Hudgens, Brian R; Duke University, Biology Department;; Bloch, Philip L; ;; Chinnadurai, Sathya; ;; Morris, William F; ;.
Despite the volume of the academic conservation biology literature, there is little evidence as to what effect this work is having on endangered species recovery efforts. Using data collected from a national review of 136 endangered and threatened species recovery plans, we evaluated whether recovery plans were changing in response to publication trends in four areas of the academic conservation biology literature: metapopulation dynamics, population viability analysis, conservation corridors, and conservation genetics. We detected several changes in recovery plans in apparent response to publication trends in these areas (e.g., the number of tasks designed to promote the recovery of an endangered species shifted, although these tasks were rarely assigned...
Tipo: Peer-Reviewed Reports
Palavras-chave: Conservation biology; Conservation corridors; Conservation genetics; Endangered species; Endangered Species Act; Influential papers; Population Viability Analysis; PVA; Recovery plans.
Ano: 2002

Genetic characterization of the Neotropical catfish Pimelodus maculatus (Pimelodidae, Siluriformes) in the Upper Uruguay River
Provedor de dados: Genetics and Molecular Biology
Autores: Ribolli,Josiane; Melo,Cláudio Manoel Rodrigues de; Zaniboni-Filho,Evoy.
Freshwater fish present unique challenges when one attempts to understand the factors that determine the structure of their populations. Habitat fragmentation is a leading cause of population decline that threatens ecosystems worldwide. In this study, we investigated the conservation status of genetic variability in the Neotropical catfish (Pimelodus maculatus). Specifically, we examined the structure and genetic diversity of this species in a region of the Upper Uruguay River fragmented by natural barriers and dams. There was no genetic structure among the four sites analyzed, indicating the existence of only one population group. A combination of environmental management and genetic monitoring should be used to minimize the impact of impoundment on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Dams; Habitat fragmentation; Microsatellite.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000500009

Molecular evidence for a recent demographic expansion in the puma (Puma concolor) (Mammalia, Felidae)
Provedor de dados: Genetics and Molecular Biology
Autores: Matte,Eunice M.; Castilho,Camila S.; Miotto,Renata A.; Sana,Denis A.; Johnson,Warren E.; O'Brien,Stephen J.; Freitas,Thales R. O. de; Eizirik,Eduardo.
The puma is an iconic predator that ranges throughout the Americas, occupying diverse habitats. Previous phylogeographic analyses have revealed that it exhibits moderate levels of genetic structure across its range, with few of the classically recognized subspecies being supported as distinct demographic units. Moreover, most of the species' molecular diversity was found to be in South America. To further investigate the phylogeographic structure and demographic history of pumas we analyzed mtDNA sequences from 186 individuals sampled throughout their range, with emphasis on South America. Our objectives were to refine the phylogeographic assessment within South America and to investigate the demographic history of pumas using a coalescent approach. Our...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Mammals; Mitochondrial DNA; Molecular time estimate; Phylogeography.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400018

Mitochondrial DNA variation in wild populations of Leporinus elongatus from the Paraná River basin
Provedor de dados: Genetics and Molecular Biology
Autores: Martins,Cesar; Wasko,Adriane P.; Oliveira,Claudio; Foresti,Fausto.
Leporinus elongatus, a fish species widely distributed throughout the Paraná River basin in South America, is an important fishery resource and a valuable species in aquaculture programs. Despite its great economic importance, several wild populations have been suffering a drastic reduction. The comprehension of its population structure represents an important step for the conservation of these organisms in natural environments, and also for the selection of wild stocks to be used in hatchery programs. In order to understand the genetic-population structure of L. elongatus, D-loop mitochondrial DNA analyses were applied in six wild populations of the species. The results were used to estimate the levels of within and among population genetic variability....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; D-loop; Genetic variability; Leporinus elongatus; MtDNA.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000100006

Fine-scale spatial genetic structure of Dalbergia nigra (Fabaceae), a threatened and endemic tree of the Brazilian Atlantic Forest
Provedor de dados: Genetics and Molecular Biology
Autores: Buzatti,Renata Santiago de Oliveira; Ribeiro,Renata Acácio; Lemos Filho,José Pires de; Lovato,Maria Bernadete.
The Atlantic Forest is one of the most diverse ecosystems in the world and considered a hotspot of biodiversity conservation. Dalbergia nigra (Fabaceae) is a tree endemic to the Brazilian Atlantic Forest, and has become threatened due to overexploitation of its valuable timber. In the present study, we analyzed the genetic diversity and fine-scale spatial genetic structure of D. nigra in an area of primary forest of a large reserve. All adult individuals (N = 112) were sampled in a 9.3 ha plot, and genotyped for microsatellite loci. Our results indicated high diversity with a mean of 8.6 alleles per locus, and expected heterozygosity equal to 0.74. The co-ancestry coefficients were significant for distances among trees up to 80 m. The Sp value was equal to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dalbergia nigra; Atlantic Forest; Conservation genetics; Fine-scale spatial genetic structure; Sp statistic.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000500019

Noninvasive genetic sampling of endangered muriqui (Primates, Atelidae): efficiency of fecal DNA extraction
Provedor de dados: Genetics and Molecular Biology
Autores: Chaves,Paulo B.; Paes,Marcela F.; Mendes,Sérgio L.; Strier,Karen B.; Louro,Iúri D.; Fagundes,Valéria.
The muriqui (Brachyteles) is one of the most endangered primates in the world, however little is known about the viability of the remaining populations. We evaluated the technique of extracting DNA from wild muriqui feces for PCR applications. In order to determine the effect of the DNA in subsequent amplifications, we analyzed five different extracts. The importance of the recommended BSA and the HotStarTaq DNA polymerase was tested. The minimal conditions to successfully amplify highly degraded fecal DNA were determined, showing that the recommended reagents are not required. We envision that this method may be useful in further conservation management studies.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyteles; Conservation genetics; Endangered species; Fecal DNA; Noninvasive sampling.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000400028

Phylogeography and RAPD-PCR variation in Hoplias malabaricus (Bloch, 1794) (Pisces, Teleostei) in southeastern Brazil
Provedor de dados: Genetics and Molecular Biology
Autores: Dergam,Jorge A.; Paiva,Samuel R.; Schaeffer,Carlos E.; Godinho,Alexandre L.; Vieira,Fabio.
In the Rio Doce basin of southeastern Brazil, the freshwater fish Hoplias malabaricus (trahira) is a widespread predatory characin and one of the few resilient native fishes in a highly impacted lake system. In order to test for genetic differentiation in populations within this basin and for biogeographic relationships among populations of this species in other basins, a study was conducted using RAPD-PCR analysis of Rio Doce samples (N = 63) and phylogeographic analyses with mitochondrial DNA (mtDNA) haplotypes, including the Rio Grande and Macacu river basins. In the Rio Doce basin, the patterns of genetic similarity of RAPD-PCR markers (individual fingerprinting and Nei’s genetic distance) suggest the existence of two genetically different groups, one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RAPD; SSCP; MtDNA; Phylogeography; Hoplias malabaricus; Conservation genetics.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400005

Genetic characterization of Bhutanese native chickens based on an analysis of Red Junglefowl (Gallus gallus gallus and Gallus gallus spadecieus), domestic Southeast Asian and commercial chicken lines (Gallus gallus domesticus)
Provedor de dados: Genetics and Molecular Biology
Autores: Dorji,Nedup; Duangjinda,Monchai; Phasuk,Yupin.
The genetic diversity of Bhutanese chickens needs to be understood in order to develop a suitable conservation strategy for these birds in Bhutan. In this, work, we used microsatellite markers to examine the genetic diversity of Bhutanese chickens. Four Bhutanese chicken varieties (Black plumage, Frizzle, Naked neck and Red Junglefowllike, corresponding to Yuebjha Narp, Phulom, Khuilay and Seim, respectively), two subspecies of Red Junglefowl (Gallus gallus gallus and Gallus gallus spadecieus), two varieties of Thai native chickens (Pradhu Hang Dam and Chee; Gallus gallus domesticus) representing the Southeast Asian domestic chicken, and two commercial lines (Broiler and Single Comb White Leghorn) were genotyped with 18 microsatellites that included 16...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Genetic comparisons; Genetic variability; Microsatellites.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400010

Genomic resources for the conservation and management of the harpy eagle (Harpia harpyja, Falconiformes, Accipitridae)
Provedor de dados: Genetics and Molecular Biology
Autores: Banhos,Aureo; Hrbek,Tomas; Gravena,Waleska; Sanaiotti,Tânia; Farias,Izeni P.
We report the characterization and optimization of 45 heterologous microsatellite loci, and the development of a new set of molecular sex markers for the conservation and management of the Neotropical harpy eagle (Harpia harpyja L. 1758). Of the 45 microsatellites tested, 24 were polymorphic, six monomorphic, 10 uncharacterizable due to multiple bands and five did not amplify. The observed gene diversity of the analyzed sample of H. harpyja was low and similar to that of other threatened Falconiformes. While a high proportion of the microsatellite markers were highly variable, individuals of H. harpyja could be differentiated by a joint analysis of just three (p = 2.79 x 10-4) or four markers (p = 2.89 x 10-5). Paternity could be rejected with 95.23% and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Harpia harpyja; Microsatellites; Raptors; Sex markers.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100025

Genetic diversity and population structure of bocachico Prochilodus magdalenae (Pisces, Prochilodontidae) in the Magdalena River basin and its tributaries, Colombia
Provedor de dados: Genetics and Molecular Biology
Autores: Berdugo,Gilberto Orozco; Narváez Barandica,Juan C.
Prochilodus magdalenae is an endemic freshwater fish that occurs in the Magdalena, Sinú and Atrato hydrographic basins. It has an important economic role and is a food resource for the artisanal fishing communities. Its socioeconomic importance contrasts with the current status of its fisheries, where stocks are being depleted. Considering its importance and lack of information on its genetic structure, we used seven microsatellite markers to assess the genetic structure of wild populations of P. magdalenae. The genetic diversity was assessed and the population genetic structure was estimated through Fst, analysis of molecular variance and Bayesian analysis. A total of 290 alleles were found in all loci throughout all population. The high polymorphism...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical fish; Microsatellite; Conservation genetics; Population genetics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000100008

Genetic structure in two northern muriqui populations (Brachyteles hypoxanthus, Primates, Atelidae) as inferred from fecal DNA
Provedor de dados: Genetics and Molecular Biology
Autores: Fagundes,Valéria; Paes,Marcela F.; Chaves,Paulo B.; Mendes,Sérgio L.; Possamai,Carla de B.; Boubli,Jean P.; Strier,Karen B.
We assessed the genetic diversity of two northern muriqui (Brachyteles hypoxanthus Primata, Atelidae) populations, the Feliciano Miguel Abdala population (FMA, n = 108) in the Brazilian state of Minas Gerais (19°44' S, 41°49' W) and the Santa Maria de Jetibá population (SMJ, n = 18) in the Brazilian state of Espírito Santo (20°01' S, 40°44' W). Fecal DNA was isolated and PCR-RFLP analysis used to analyze 2160 bp of mitochondrial DNA, made up of an 820 bp segment of the gene cytochrome c oxidase subunit 2 (cox2, EC 1.9.3.1), an 880 bp segment of the gene cytochrome b (cytb, EC 1.10.2.2) and 460 bp of the hypervariable segment of the mtDNA control region (HVRI). The cox2 and cytb sequences were monomorphic within and between populations whereas the HVRI...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Brachyteles; Conservation genetics; Fecal DNA; MtDNA; PCR-RFLP.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100028

Phylogeographic analyses of the pampas cat (Leopardus colocola; Carnivora, Felidae) reveal a complex demographic history
Provedor de dados: Genetics and Molecular Biology
Autores: da Silva Santos,Anelisie; Trigo,Tatiane Campos; de Oliveira,Tadeu Gomes; Silveira,Leandro; Eizirik,Eduardo.
Abstract The pampas cat is a small felid that occurs in open habitats throughout much of South America. Previous studies have revealed intriguing patterns of morphological differentiation and genetic structure among its populations, as well as molecular evidence for hybridization with the closely related L. tigrinus. Here we report phylogeographic analyses encompassing most of its distribution (focusing particularly on Brazilian specimens, which had been poorly sampled in previous studies), using a novel dataset comprising 2,143 bp of the mitogenome, along with previously reported mtDNA sequences. Our data revealed strong population strutucture and supported a west-to-east colonization process in this species’ history. We detected two population expansion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phylogeography; Population genetics; Mitochondrial DNA; Conservation genetics; Historical demography.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200273

When physical oceanography meets population genetics: The case study of the genetic/evolutionary discontinuity in the endangered goliath grouper (Epinephelus itajara, Perciformes: Epinephelidae) with comments on the conservation of the species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benevides, E. A.; Vallinoto, M. N. S.; Fetter Filho, A. F. H.; De Souza, J. R. B.; Silva-oliveira, G.; Freitas, M. O.; Ferreira, B. P.; Hostim-silva, M.; Bertoncini, A. A.; Blanchard, Fabian; Torres, R. A.
Epinephelus itajara is one of the marine fish species most threatened for extinction and it is considered to be "critically endangered" by the IUCN. The present study evaluated the genetic diversity of the species and the genetic/evolutionary relationships of its populations along the Atlantic coast of South America. The results indicate relatively reduced genetic variation, re-emphasizing the low adaptive potential of the species. One of the populations presented relatively high degrees of genetic diversity and it is evolutionary isolated from the all other populations. The evidences indicate the existence of two Evolutionarily Significant Units comprising E. itajara in the Atlantic coast of South America and the conservation prospects for the species...
Tipo: Text
Palavras-chave: Epinephelus itajara; ISSRs; Population genetics; Conservation genetics.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00230/34100/34465.pdf

A river runs through it: The causes, consequences, and management of intraspecific diversity in river networks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchet, Simon; Prunier, Jérôme G.; Paz‐vinas, Ivan; Saint‐pé, Keoni; Rey, Olivier; Raffard, Allan; Mathieu‐bégné, Eglantine; Loot, Géraldine; Fourtune, Lisa; Dubut, Vincent.
Rivers are fascinating ecosystems in which the eco‐evolutionary dynamics of organisms are constrained by particular features, and biologists have developed a wealth of knowledge about freshwater biodiversity patterns. Over the last 10 years, our group used a holistic approach to contribute to this knowledge by focusing on the causes and consequences of intraspecific diversity in rivers. We conducted empirical works on temperate permanent rivers from southern France, and we broadened the scope of our findings using experiments, meta‐analyses, and simulations. We demonstrated that intraspecific (genetic) diversity follows a spatial pattern (downstream increase in diversity) that is repeatable across taxa (from plants to vertebrates) and river systems. This...
Tipo: Text
Palavras-chave: Conservation genetics; Dendritic networks; Eco‐evolutionary dynamics; Ecosystem services; Intraspecific diversity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00617/72935/71954.pdf

Pleistocene karyotypic divergence in Hoplias malabaricus (Bloch, 1794) (Teleostei: Erythrinidae) populations in southeastern Brazil
Provedor de dados: Neotropical Ichthyology
Autores: Jacobina,Uedson Pereira; Paiva,Edson; Dergam,Jorge Abdala.
The lacustrine system of the middle rio Doce basin is considered a paradigm of Pleistocene geomorphology. In these lakes, two Hoplias malabaricus karyomorphs (2n = 42A and 2n = 42B) live in sintopy in Carioca Lake. Cytogenetic analyses were performed on 65 specimens from 8 lakes (including Carioca Lake) to determine the distribution and relative frequency of these karyomorphs and the degree of cytogenetic divergence caused putatively by recent geographic isolation. All fish were 2n = 42B karyomorphs, except for 1 specimen from the Marola Lake, which was 2n = 42A. Among-population variation was especially high for C-banding patterns. Other characters such as X chromosome size and CMA3/DAPI also varied among populations. Our results suggested that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Karyotype evolution; Middle rio Doce Valley; Sympatry.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200009

The roles of marginal lagoons in the maintenance of genetic diversity in the Brazilian migratory fishes Prochilodus argenteus and P. costatus
Provedor de dados: Neotropical Ichthyology
Autores: Melo,Bruno F.; Sato,Yoshimi; Foresti,Fausto; Oliveira,Claudio.
The rio São Francisco basin contains many endemic species, such as Prochilodus argenteus and P. costatus, which have great commercial importance. However, information about the main recruitment sites and genetic studies containing extensive sampling of these species are scarce. To investigate the roles of the marginal lagoons in the maintenance of genetic variability and in the population structure, we analyzed six microsatellite loci in nine sampling groups of P. argenteusand five sampling groups of P. costatus. Our results showed high levels of genetic variability and low values of genetic differentiation for P. argenteus (FST =0.008, P&lt; 0.05) and for P. costatus(FST =0.031, P &lt; 0.05). In addition, high values of gene flow combined with a small...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Fish migration; Microsatellite; Nursery area; Rio São Francisco basin.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300625

Molecular identification of Atlantic goliath grouper Epinephelus itajara (Lichtenstein, 1822) (Perciformes: Epinephelidae) and related commercial species applying multiplex PCR
Provedor de dados: Neotropical Ichthyology
Autores: Damasceno,Júnio S.; Siccha-Ramirez,Raquel; Oliveira,Claudio; Mendonça,Fernando F.; Lima,Arthur C.; Machado,Leonardo F.; Tosta,Vander C.; Farro,Ana Paula C.; Hostim-Silva,Maurício.
ABSTRACT The Atlantic goliath grouper, Epinephelus itajara , is a critically endangered species, threatened by illegal fishing and the destruction of its habitats. A number of other closely related grouper species found in the western Atlantic are also fished intensively. While some countries apply rigorous legislation, illegal harvesting followed by the falsification of fish products, which impedes the correct identification of the species, is a common practice, allowing the catch to be marketed as a different grouper species. In this case, molecular techniques represent an important tool for the monitoring and regulation of fishery practices, and are essential for the forensic identification of a number of different species. In the present study,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; COI; Endangered species; Fishery management; Forensic genetics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300203

Genetic characterization of the Moxotó goat breed using RAPD markers
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Oliveira,Rejane Rodrigues de; Egito,Andréa Alves do; Ribeiro,Maria Norma; Paiva,Samuel Rezende; Albuquerque,Maria do Socorro Maués; Castro,Silvia Ribeiro; Mariante,Arthur da Silva; Adrião,Manuel.
The objective of this study was to verify the genetic diversity between and within seven populations of Moxotó goat (n = 264) from the States of Pernambuco, Paraíba and Rio Grande do Norte, using RAPD (Random Amplified Polymorphic DNA). Moxotó, as well as other naturalized breeds, suffers genetic losses due to the indiscriminate miscegenation with breeds raised in the Northeast Region of Brazil. The genetic characterization of these genetic resources is essential to conservation and breeding programs. DNA was extracted from lymphocytes using a non-organic protocol. The 16 primers used were selected from 120 decamer oligonucleotide primers and generated 56 polymorphic bands. The analysis of molecular variance (AMOVA) showed that the greater part of total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capra hircus; Native breeds; Population structure; Conservation genetics.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000300006

Genetic variability of the Brazilian hair sheep breeds
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Paiva,Samuel Rezende; Silvério,Vanessa Chaves; Egito,Andréa Alves; McManus,Concepta; Faria,Danielle Assis de; Mariante,Arthur da Silva; Castro,Sílvia Ribeiro; Albuquerque,Maria do Socorro Maués; Dergam,Jorge Abdala.
The objectives of this work were to investigate the genetic structure of the Brazilian hair sheep breeds and to determine the origin of the Santa Inês breed. Molecular similarity was determined using Randomly Amplified Polymorphic DNA - Polymerase Chain Reaction markers in 238 individuals from five naturalized sheep breeds: Santa Inês (48 animals), Rabo Largo (48), Somali (48), Morada Nova (48) and Bergamasca (46), collected in Goiás, Sergipe, Bahia, and Ceará States as well as in the Federal District. Fifty-four loci were selected from 19 primers, after a pilot test using 140 primers. Qualitative analyses indicate diagnostic markers for all breeds. All breeds were significantly different from each other. Interbreed differences were explained by 14.92% of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovis aries; Conservation genetics; Domestic animal diversity; Molecular markers; RAPD.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000900008

Hybrids between Pseudoplatystoma corruscans and P. reticulatum (Siluriformes: Pimelodidae) previously reported in the Upper Paraná River are likely escapes from aquaculture farms: evidence from microsatellite markers
Provedor de dados: Revista Brasileira de Zoologia
Autores: Baggio,Rafael A.; Moretti,Caroline B.; Bialetzki,Andréa; Boeger,Walter A.
ABSTRACT The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix &amp; Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann &amp; Eigenmann, 1889) in captivity has generated many concerns about the possibility of introduction of farmed hybrids into natural environments. In the last decade, hybrids between these species, known as 'pintachara' or 'cachapinta', were reported from different regions of the Upper Paraná River basin. Prospection of these hybrids is important in order to orient conservation programs for the species involved. Knowledge of the presence of these hybrids will direct conservation strategies towards prevention and/or mitigation of the effects of cross breeding in natural populations of P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Fish larvae; Interspecific hybrids; Introgression; Molecular markers.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000201303

Allelic diversity in populations of Solanum lycocarpum A. St.-Hil (Solanaceae) in a protected area and a disturbed environment
Provedor de dados: Acta Botanica Brasilica
Autores: Moura,Tânia Maria de; Sebbenn,Alexandre Magno; Martins,Karina; Moreno,Maria Andreia; Oliveira,Giancarlo Conde Xavier; Chaves,Lázaro José; Kageyama,Paulo Yoshio.
This study aimed to compare the genetic diversity of populations of Solanum lycocarpum A.St.-Hil between natural and human disturbed environments, with the assumption that protected areas have greater genetic diversity than disturbed areas. For this study, two populations were sampled in Goiás State, Brazil. One was located in a conservation unit, Serra de Caldas Novas State Park, in the Caldas Novas municipality. The other was located in a pasture area in the municipality of Morrinhos. The two populations are 41 km apart. We sampled 60 individuals from each population, which were genotyped with five microsatellite loci (SSR). The highest number of alleles was recorded in the population of the conservation unit, where we found 11 exclusive and five rare...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Gene flow; Conservation genetics; Genetic diversity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000400023

Preliminary qualitative analysis on mtDNA in Astyanax fasciatus populations Cuvier, 1819 (Teleostei; Characidae) indicate population distinctiveness
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Matoso,Daniele Aparecida; Martins,Cesar; Artoni,Roberto Ferreira; Galetti Jr,Pedro Manoel.
A preliminary qualitative analysis of genetic variability status in Astyanax fasciatus (Cuvier, 1819) from upper Tibagi River headwaters and Vila Velha State Park (VVSP) was carried out by enzymatic digestion (RFLP) of D-Loop region from mtDNA. The results showed that Tibagi and VVSP populations were genetically different.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical fish; RFLP; Conservation genetics.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300022

Genetic Variability of Brycon hilarii in a Repopulation Program
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Bignardi,Annaiza Braga; Povh,Jayme Aparecido; Alves,Mariana Srucki; Goes,Elenice Souza dos Reis; Filho,Ruy Alberto Caetano Corrêa; Castro,Reinaldo José; Barrero,Nelson Mauricio Lopera.
ABSTRACT Brycon hilarii, popularly called piraputanga in Brazil, is a species distributed throughout the whole basin of the river Paraguay. In recent years, the species has been on a repopulation program due to its remarkable decline as a wild species in the region. Assessment of the genetic diversity of broodstock and fingerling stocks in repopulation programs is basic to avoid genetic impacts on wild populations. The genetic variability of the wild population and of the broodstock and fingerling stocks of B. hilarii in a repopulation program in the river Itiquira MT Brazil will be determined. Seven microsatellite loci produced 52 polymorphic alleles and heterozygosity revealed rates between 0.5794 and 0.7204. FIS did not register any endogamy in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Microsatellites; Piraputanga.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100424