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      Estructura poblacional y estado de conservación de Rhinoclemmys melanosterna Gray, J.E, 1861 (Orden: Rhinoclemmys Familia Geoemydidae) en ecosistemas perturbados por minería en el Pacífico colombiano Translated title: Population structure and conservation status of Rhinoclemmys melanosterna Gray, J.E, 1861 (Order: Rhinoclemmys Family Geoemydidae) in ecosystems disturbed by mining in the Colombian Pacific

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          Abstract

          Resumen Objetivo: El presente estudio tiene como objetivo determinar la estructura poblacional y el estado de conservación de la población de Rhinoclemmys melanosterna presentes en ecosistemas perturbados por minería en el cauce del río en la cabecera municipal de Managrú. Metodología: Se realizaron 20 muestreos en cuerpos de agua perturbados por minería aurífera, donde se utilizaron trampas para captura de tortugas y redes de arrastre. Resultados: La población de la especie en estudio tuvo representada por 44 individuos; 25 por medio de trampas y 19 por medio de barridos con redes de arrastre, se aplicó un esfuerzo de muestreo de 150 horas/hombre para obtener un éxito de captura de 0,02 individuos/horas.trampa. De igual manera por medio de arrastres fue de 80 horas/hombre, y un éxito de captura de 0.01 individuos/horas.hombre. La población de R. melanosterna se observó que los machos fueron dominantes, con un 70%, lo que permitió que existieran diferencias estadísticas significativas (P-valor =0,0405). En lo que se refiere al dimorfismo sexual, no se evidenció diferencia significativa (α>0,05) en todas las medidas corporales entre machos y hembras. Conclusión: Las hembras fueron más grandes que los machos en todas las medidas corporales, tan sólo en la longitud de la cola los machos tuvieron una longitud significativamente mayor a las hembras.

          Translated abstract

          Abstract Objective: This study aims to determine the population structure and the conservation status of the population of Rhinoclemmys melanosterna present in ecosystems disturbed by mining in the riverbed in the municipal head of Managrú. Methodology: Twenty samplings were carried out in bodies of water disturbed by gold mining, where traps were used to capture turtles and trawl nets. Results: The population of the species under study was represented by 44 individuals, 25 by means of traps and 19 by means of sweeping with trawl nets. A sampling effort of 150 hours/ man was applied to obtain a capture success of 0.02 individuals/hour trap. Similarly, by means of trawling it was 80 hours/man, and a catch success was of 0.01 individuals/hour. man. In the of R. melanosterna population was observed that males were dominant, with a 70%, which allowed significant statistical differences to exist (P-value = 0.0405). Regarding sexual dimorphism, there was no significant difference (α>0.05) in all body measurements between males and females. Conclusion: The females were larger than the males in all body measurements, only in the length of the tail did the males have a significantly greater length than the females.

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          Sexual size dimorphism and sexual selection in turtles (order testudines)

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            Sexual Dimorphism in Turtles with Emphasis on the Slider Turtle (Trachemys scripta)

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              Habitat structure is more important than vegetation composition for local‐level management of native terrestrial reptile and small mammal species living in urban remnants: A case study from Brisbane, Australia

              Abstract  As urban areas continue to expand and replace natural and agricultural landscapes, the ability to manage and conserve native wildlife within urban environments is becoming increasingly important. To do so we first need to understand species' responses to local‐level habitat attributes in order to inform the decision‐making process and on‐ground conservation actions. Patterns in the occurrence of native terrestrial reptile and small mammal species in 59 sites located in remnant urban habitat fragments of Brisbane City were assessed against local‐level environmental characteristics of each site. Cluster analysis, multidimensional scaling ordination, and principal axis correlation were used to investigate relationships between species' occurrences and environmental characteristics. Native reptiles were most strongly associated with the presence of termite mounds, a high amount of fallen woody material, and a moderate amount of weed cover. Native small mammals were most strongly associated with the presence of grass trees (Xanthorrhoea spp.), and both reptiles and small mammals were negatively influenced by increased soil compaction. Significant floristic characteristics were considered to be important as structural, rather than compositional, habitat elements. Therefore, habitat structure, rather than vegetation composition, appears to be most important for determining native, terrestrial reptile and small mammal species assemblages in urban forest fragments. We discuss the management implications in relation to human disturbances and local‐level management of urban remnants.
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                Author and article information

                Journal
                bccm
                Boletín Científico. Centro de Museos. Museo de Historia Natural
                Bol. Cient. Mus. Hist. Nat. Univ. Caldas
                Universidad de Caldas. Vicerrectoría de Investigaciones y Postgrados (Manizales, Caldas, Colombia )
                0123-3068
                June 2022
                : 26
                : 1
                : 99-110
                Affiliations
                [4] Quibdó Chocó orgnameUniversidad Tecnológica del Chocó Colombia halaby@ 123456utch.edu.co
                [1] Quibdó Chocó orgnameUniversidad Tecnológica del Chocó Colombia
                [2] Quibdó Chocó orgnameUniversidad Tecnológica del Chocó Colombia
                [3] Quibdó Chocó orgnameUniversidad Tecnológica del Chocó Colombia
                Article
                S0123-30682022000100099 S0123-3068(22)02600100099
                10.17151/bccm.2022.26.1.7
                db9e7850-6d87-4591-a497-5e2912a59ce8

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 13 February 2021
                : 22 August 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 35, Pages: 12
                Product

                SciELO Colombia

                Categories
                Conservación

                Choco,population,continental turtles,Conservation,Chocó,población,tortugas continentales,Conservación

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