Población de Crocodylus acutus (Crocodylia: Crocodylidae) en dos ríos de Costa Rica
Fecha
1996
Autores
Sánchez R., Juan J.
Bolaños, Juan R.
Piedra Castro, Lilliana María
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Editor
Universidad de Costa Rica (Costa Rica)
Resumen
La distribución espacial y el tamaño de la población de Crocodylus acutus se estimaron entre diciembre de 1992 y marzo.
1993 en los ríos Tempisque y Bebedero, Guanacaste, Costa Rica. A lo largo de 47 km se avistaron 138 cocodrilos: 2,9
indlkm en Tempisque; 4,5 km en Bebedero. La distribución de longitud total en Tempisque (dividida en áreas B, C y
D) presenta individuos de Tamaño 1 (crías) en el área B. El Tamaño II (reclutas) se encontraron principalmente en el área C, junto con
Tallas III y VII (juveniles y adultos). Al área D le faltaban los tamaños IV y VII. En Bebedero la mayoría eran menores.
Los animales se notaron principalmente por sus "ojos": el 48% en el tamaño 1, el 36% en el tamaño IlI. Los individuos sexualmente maduros se concentraron
en las zonas C y D, y fueron el 12,3% de los animales observados. La distribución del tamaño, sin considerar los "ojos".
clase, fue 3% crías, 24.2 reclutas, 30.3% juveniles y 3% adultos en Bebedero; y 13%, 12,3%, 14,5% y
12.3% respectivamente en 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.
Descripción
Palabras clave
CROCODYLUS ACUTUS, DENSIDAD, DISTRIBUCIÓN, AGE CIASSES, COCODRILO, GUANACASTE (COSTA RICA)