Variabilidad genética de la tortuga del Río Magdalena, Podocnemis lewyana (duméril, 1852), en la depresión momposina, Colombia

  • Adriana Restrepo Universidad de Antioquia.
  • Brian C. Bock Universidad de Antioquia
  • Vivian P. Páez Universidad de Antioquia
Palabras clave: alozimas, estructura poblacional, Podocnemididae, Podocnemis lewyana, variabilidad genética

Resumen

Two populations of the endangered Magdalena River turtle, Podocnemis lewyana, separated by 55 km in the Mom-pos Depression were sampled to quantify levels of genetic variation and inspect for evidence of genetic structure. Allozyme analyses resolved 22 presumptive gene loci, but only one resulted polymorphic. Genotype proportions at this locus departed from those expected under Hardy-Weinberg equilibrium, showing heterozygote deficiencies in both populations. However, allele frequencies at the locus did not differ between the two sites. The level of genetic variability documented is one of the lowest yet reported for a turtle species, and may reflect either a historical or recent bottleneck event. The lack of evidence for genetic structure suggests gene flow among the sites, at least historically, but the heterozygote deficiencies at each site also imply that inbreeding may be occurring presently within each deme.

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Biografía del autor/a

Adriana Restrepo, Universidad de Antioquia.

Instituto de Biología, Universidad de Antioquia. A. A. 1226. Medellín (Antioquia), Colombia

Citas

Anonymous. 2001. Estudio ambiental de la cuenca Mag-dalena-Cauca. Informe final. Convenio 003 de 1999. Instituto de Hidrología, Meteorología y Estudios Am-bientales (IDEAM) y Corporación Autónoma Regional del Río Grande de la Magdalena (CorMagdalena). Bogotá D.C., Colombia.Avise JC. 2004. Molecular markers, natural history, and evo-lution. Second edition. Sinauer Associates. Sunderland, Massachusetts, USA.Bazin R, Glemin S, Galtier N. 2006. Population size does not influence mitochondrial genetic diversity in animals. Science, 312:570-572.Bock BC, Páez VP, White MM. 2001. Genetic population structure of two endangered South American river

turtle species (Podocnemis expansa and P. unifilis). Chelonian Conservation and Biology, 4:47-52.Bohonak AJ. 1999. Dispersal, gene flow and population structure. Quarterly Review of Biology, 74:21-45.Bonnel ML,Selander RK. 1974. Elephant seals: Genetic variation and near extinction. Science, 184:908-909.Britten HB, Riddle BR, Brussard PF, Marlow RW, Lee TE. 1997. Genetic delineation of management units for the desert tortoise, Gopherus agassizii, in northeastern Mojave Desert. Copeia, 1997:523-530.Castaño-M OV. 1986. Contribución al conocimiento de la reproducción de Podocnemis lewyana, Dumeril 1852 (Reptilia: Quelonia: Pelomedusidae). Caldasia,15:71-75.

Castaño-M OV. 2002. Libro rojo de reptiles de Colombia.Instituto de Ciencias Naturales-Universidad Nacional de Colombia, Ministerio de Medio Ambiente, Conser-vación Internacional. Bogotá D.C. Colombia.Corpomojana (Corporación para el Desarrollo Sostenible de la Mojana y el San Jorge). 2002. Plan de manejo ambiental de los humedales asociados al bajo Río San Jorge en los municipios de Caimito, San Benito Abad, y San Marcos, Sucre. Ministerio de Medio Ambiente y Corpomojana. San Marcos, Sucre, Colombia.DGE (Dirección General de Ecosistemas). 2002. Programa nacional para la conservación de las tortugas marinas y continentales en Colombia. Dirección General de Ecosistemas. Bogotá, Colombia.Díaz-G M, Camacho LA, Maestre A. 2001. Modelación de balances hídricos de ciénagas fluviales y costeras colombianas. Revista de Ingeniería, Universidad de los Andes, 13:12-30.DMAAC (Defense Mapping Agency Aerospace Center). 1995. Riverine route maps. Maps 105-108. Defense Mapping Agency Aerospace Center. St. Louis, Mis-souri, USA.Escalona T, Hernández OE, Engstrom TN, Bock BC, Vogt RC, Valenzuela N. In press. Population genetics of the endangered South American freshwater turtle, Podoc-nemis unifilis, inferred from microsatellite DNA data. Conservation Genetics.Fals BO. 2002. Mompox y Loba: Historia Doble de la Costa 1. El Áncora Editores. Bogotá, Colombia.FitzSimmons NN, Hart KM. 2007. Genetic studies of fres-hwater turtles and tortoises: A review of the past 70 years. Chelonian Research Monographs, 4:15-46.Frankham R, Ballou JD, Briscou DA. 2002. Introduction to Conservation Genetics. Cambridge University Press. Cambridge, UK.Gallego-G N, Castaño-M OV. 2008. Ecology and status of the Magdalena River turtle Podocnemis lewyanaa Colombian endemic. Chelonian Conservation and Biology, 7:37-44.Gallego-G N. 2004. Anotaciones sobre la historia natural de la tortuga de río Podocnemis lewyana (Testudinata: Podocnemididae) en el Río Sinú, Córdoba, Colombia. Undergraduate thesis. Universidad Militar Nueva Gra-nada. Bogotá, Colombia.Gallo H,Díaz-S J. 2003. Variabilidad genética del bagre rayado Pseudoplatystoma fasciatum (Pisces: Pimelo-didae) en el Río Magdalena (Colombia). Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 27:599-605.Gálvis G, Mojica JI, Lozano C. 1997. Peces del Catatumbo. Asociación Cravo Norte. Bogotá, Colombia.Gibbons JW. 2003. Terrestrial habitat: A vital component for herpetofauna of isolated wetlands. Wetlands,23:630-635.Gibbons, JW. 1970. Terrestrial activity and the population

dynamics of aquatic turtles. American Midland Natu-ralist, 83:404-414.Harris H, Hopkinson DA. 1978. Handbook of enzyme elec-trophoresis in human genetics. North-Holland Publ. Co. Amsterdam, Netherlands.Hurtado N. 1973. Algunos aspectos bioecológicos de Podocnemis lewyana (Dumeril, 1984) (Testudinata: Pleurodira: Pelomedusidae 1830). Biol 1. Centro de Investigaciones Biológico pesqueras del Río Magda-lena. La Dorada, Caldas, Colombia.Kohn MH, Murphy WJ, Ostrander EA, Wayne RK. Ge-nomics and conservation genetics. Trends in Ecology and Evolution, 21:629-637.Lande R,Barrowclough GF. 1987. Effective population size, genetic variation, and their use in population management. Pp. 87-123. In: Soulé ME (ed.). Viable Populations for Conservation. Cambridge Univ. Press, Cambridge, UK.Lande R. 1999. Extinction risks from anthropogenic, eco-logical, and genetic factors. Pp. 1-22. In: Landweberg LF, Dobson AP (eds.). Genetics and the extinction of species: DNA and the conservation of biodiversity. Pri-ceton University Press. Princeton, New Jersey, USA.Larson S,Jameson R, Etnier M, Fleming M, Bentzen P.2002. Loss of genetic diversity in sea otters (Enhydra lutris) associated with the fur trade of the 18th and 19thcenturies. Molecular Ecology, 11:1899-1903.Lundberg J, Machado-A A, Kay RF. 1986. Miocene Cha-racidae fishes from Colombia: Evolutionary Stasis and Extirpation. Science, 234:208-209.Martinez LM, Bock BC, Páez VP. 2007. Population genetics of the slider turtle (Trachemys scripta callirostris) in the Mompos Depression, Colombia. Copeia, 2007:1001-1005.Maynard-S J, Haigh J. 1974. The hitch-hiking effect of a favourable gene. Genetics Research, 23:23-35.Moritz C. 1994a. Applications of mitochondrial DNA analisis on conservation. Molecular Ecology, 3:401-411.Moritz C. 1994b. Defining “evolutionarily significant units” for conservation. Trends in Ecology and Evolution, 9:373-375.Murphy RW, Sites JW, Buth DG, Haufler CH. 1996. Proteins: isozyme electrophoresis. Pp. 51-120. In: Hillis DM, Moritz C, Mable BK (eds.). Molecular systematics. Sinauer Associates, Inc. Sunderland, Massachusetts, USA.Páez VP, Correa JC, Cano AM.In press. A comparison of maternal and temperature effects on sex, size, and growth of hatchlings of the Magdalena River turtle (Podocnemis lewyana) incubated under field and con-trolled laboratory condiditions. Copeia.Pearse DE, Arndt AD, Valenzuela N, Millar BA, Cantarelli V, Sites JW. 2006. Estimating population structure under nonequilibrium conditions in a conservation context: continent-wide population genetics of the giant

Sites JW Jr, Bickham JW, Pytel BA, Greenbaum IF, Bates BA. 1984. Biochemical characteristics and the recons-truction of turtle phylogenies: Relationships among Batagurine genera. Systematic Zoology, 33:137-158.Sites JW, FitzSimmons NN, Da Silva JN, Canterelli VH.1999. Conservation genetics of the giant Amazon River turtle (Podocnemis expansa; Pelomedusidae): Inferen-ces from two classes of molecular markers. Chelonian Conservation and Biology, 3:454-463.Turbay S, Gómez GA, López AD, Alzate C, Álvarez AJ.2000. La fauna de la Depresión Momposina. Editorial Lealon. Medellín, Colombia.Uller T, Olsson M. 2008. Multiple paternity in reptiles: Patterns and processes. Molecular Ecology, 17:2566-2580.Valenzuela N. 2001. Genetic differentiation among nesting beaches in the highly migratory giant river turtle (Po-docnemis expansa) from Colombia. Herpetologica,57:48-57.Vargas-R M, Castaño-M OV, Fritz U. 2008. Molecular phylogeny and divergence times of ancient South American and Malagasy river turtles (Testudines: Pleurodira: Podocnemididae). Organisms, Diversity and Evolution, 8:388-398.Vargas-R M, Chiari Y, Castaño-M OV, Menken SBJ. 2007. Low genetic variability in the endangered Colombian endemic freshwater turtle Podocnemis lewyana (Tes-tudines, Podocnemididae). Contributions to Zoology,76:1-7.Yeh, FC, Yang RC, Boyle BJ, Ye ZH, Mao JX. 1997. PO-PGENE, the user-friendly shareware for population genetic analysis. Molecular Biology and Biotechnology Centre, University of Alberta. Alberta, Canada.

Publicado
2010-02-08
Cómo citar
Restrepo A., Bock B. C., & Páez V. P. (2010). Variabilidad genética de la tortuga del Río Magdalena, <i>Podocnemis lewyana</i&gt; (duméril, 1852), en la depresión momposina, Colombia. Actualidades Biológicas, 30(89), 1-9. Recuperado a partir de https://revistas.udea.edu.co/index.php/actbio/article/view/4741
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