Población de Crocodylus acutus (Crocodylia: Crocodylidae) en dos ríos de Costa Rica
Date
Authors
Sánchez R., Juan J.
Bolaños, Juan R.
Piedra Castro, Lilliana
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Costa Rica
Abstract
Description
La distribución espacial y el tamaño poblacional de Crocodylus acutus fue estimado durante diciembre 1992- marzo 1993 en los ríos Tempisque y Bebedero, Guanacaste, Costa Rica. A lo largo de 47 kilómetros, 138 cocodrilos fueron observados: 2.9 ind/km en el T empisque; 4.5 ind/km e n el Bebedero. L a distribución por talla en el Tempisque (dividido en área B, C y O) es variable, encontrándose la talla I (neonatos) preferentemente en el área B. La talla JI (reclutas) se encontró mayormente en el área C," junto con tallas entre 111 y VII (juveniles y adultos). En el área D no se encontraron las tallas IV y VII. Para el río Bebedero la mayoría fueron juveniles. Los animales fueron observados principalmente por sus "ojos" con un 48%; un 36% corresponde a individuos de clases I y 1Il. Los individuos sexualmente maduros, se concentran en las áreas C y D, Y fueron 12.3% del total de individuos observados. La distribución de las clases por tallas, sin considerar la clase "ojos", fue de 3% neonatos, 24,2% reclutas, 30,3% juveniles y 3% adultos en el Bebedero; y 13%, 12.3%, 14,5% Y 12,3% respectivamente en el Tempisque.
Spatial distribution and population size of Crocodylus acutus were estimated during December 1992-March 1993 in the Tempisque and Bebedero rivers, Guanacaste, Costa Rica. Along 47 km, 138 crocodiles were seen: 2.9 indlkm in Tempisque; 4.5 indlkm in Bebedero. The total length distribution in Tempisque (divided in areas B, C and D) presents individuals in Size 1 (hatchlings) in area B. Size II (recruits) were mainly found in area C, together with sizes III and VII (juveniles and adults). Area D lacked with sizes IV and VII. In Bebedero most were juveniles. Animals were noticed mainly for their "eyes": 48% to size 1, 36% to size IlI. Sexualy mature individuals were concentrated in areas C and D, and were 12.3% of the observed animals. The size distribution, without considering the "eyes" cIass, was 3% hatchlings, 24.2 recruits, 30.3% juveniles and 3% adults in Bebedero; and 13%, 12.3%, 14.5% and 12.3% respectively in Tempisque.
Spatial distribution and population size of Crocodylus acutus were estimated during December 1992-March 1993 in the Tempisque and Bebedero rivers, Guanacaste, Costa Rica. Along 47 km, 138 crocodiles were seen: 2.9 indlkm in Tempisque; 4.5 indlkm in Bebedero. The total length distribution in Tempisque (divided in areas B, C and D) presents individuals in Size 1 (hatchlings) in area B. Size II (recruits) were mainly found in area C, together with sizes III and VII (juveniles and adults). Area D lacked with sizes IV and VII. In Bebedero most were juveniles. Animals were noticed mainly for their "eyes": 48% to size 1, 36% to size IlI. Sexualy mature individuals were concentrated in areas C and D, and were 12.3% of the observed animals. The size distribution, without considering the "eyes" cIass, was 3% hatchlings, 24.2 recruits, 30.3% juveniles and 3% adults in Bebedero; and 13%, 12.3%, 14.5% and 12.3% respectively in Tempisque.