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Abstract:

Basic information, such as population size and density, is needed for conservation and management of many species, especially threatened species. Thus, well-designed population monitoring programs that use appropriate methods for estimating parameters of interest, including density and survival, are needed as well. Mark-recapture and distance-sampling are established methods for estimating density in wildlife surveys. The sand dune lizard (Liolaemus multimaculatus) is an endemic and vulnerable species that inhabits dune habitats in Argentina. At present, however, there are no accurate estimates of density of this species and no established monitoring programs. The objectives ofthis study were (1) to test the use ofmark- recapture and distance-sampling methods and (2) to estimate density of this species in Mar chiquita Reserve (37° 37' S-57° 16° W), an important area for the protection of this species. For distance-sampling surveys, we used asystematic line-transect design; for mark-recapture sampling, we performed exhaustive surveys and captured, marked, and recaptured lizards manually. Based on distance-sampling, populations were estimated at 3.6 and 5.4 individuals per ha in 2007 and 2008, respectively; corresponding estimates based on mark- recapture data were 5.2 and 4.1 individuals per ha in 2007 and 2008, respectively. Detection probabilities were 0.23 in both 2007 and 2008 distance-sampling analyses and capture probabilities were 0.02 and 0.05 in 2007 and 2008 mark-recapture analyses. Based on these estimates, the Mar Chiquita Reserve contains a population of at least 10, 000 individuals. Both methods were adequate for estimating populations of sand dune lizards, given the facility with which individuals can be detected and captured. The distance-sampling method requires less effort, but the mark-recapture method allows estimates of survival as well as density. Results of this work provide the baseline for developing a monitoring program for this lizard, and we suggest that the distance-sampling method be used to monitor all populations of sand dune lizard. © 2009 by The Herpetologists' League, Inc.

Registro:

Documento: Artículo
Título:Methods for assessing population size in sand dune lizards (Liolaemus Multimaculatus)
Autor:Kacoliris, F.P.; Berkunsky, I.; Williams, J.D.
Filiación:Seccioon Herpetologia, Division Zoologia Vertebrados, Museo de la Plata, Paseo del Bosque, s/n, CP1900, Buenos Aires, Argentina
Departamento de Ecologia, Geniitica y Evolucioon, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CP1428 Buenos Aires, Argentina
Palabras clave:Conservation; Density; Monitoring; Sand dune lizard; assessment method; dune; endangered species; estimation method; lizard; mark-recapture method; population density; population size; sampling; survival; Argentina; Buenos Aires [Argentina]; Mar Chiquita Biosphere Reserve; South America; Liolaemus multimaculatus; Squamata
Año:2009
Volumen:65
Número:2
Página de inicio:219
Página de fin:226
DOI: http://dx.doi.org/10.1655/08-036R1.1
Título revista:Herpetologica
Título revista abreviado:Herpetologica
ISSN:00180831
CODEN:HPTGA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180831_v65_n2_p219_Kacoliris

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Citas:

---------- APA ----------
Kacoliris, F.P., Berkunsky, I. & Williams, J.D. (2009) . Methods for assessing population size in sand dune lizards (Liolaemus Multimaculatus). Herpetologica, 65(2), 219-226.
http://dx.doi.org/10.1655/08-036R1.1
---------- CHICAGO ----------
Kacoliris, F.P., Berkunsky, I., Williams, J.D. "Methods for assessing population size in sand dune lizards (Liolaemus Multimaculatus)" . Herpetologica 65, no. 2 (2009) : 219-226.
http://dx.doi.org/10.1655/08-036R1.1
---------- MLA ----------
Kacoliris, F.P., Berkunsky, I., Williams, J.D. "Methods for assessing population size in sand dune lizards (Liolaemus Multimaculatus)" . Herpetologica, vol. 65, no. 2, 2009, pp. 219-226.
http://dx.doi.org/10.1655/08-036R1.1
---------- VANCOUVER ----------
Kacoliris, F.P., Berkunsky, I., Williams, J.D. Methods for assessing population size in sand dune lizards (Liolaemus Multimaculatus). Herpetologica. 2009;65(2):219-226.
http://dx.doi.org/10.1655/08-036R1.1