LANGUAGE
ES / EN
SUBMIT ARTICLE

BACK TO TABLE OF CONTENTS Volume 40

ISSUE 2

Previous

Índice de la Revista de Biología Marina y Oceanografía entre 1948 y 2005 

RESEARCH NOTE

Ecología poblacional, distribución y estudio de hábitat de Crocodylus acutus (Cuvier, 1807) en la “Reserva de producción de fauna manglares El Salado” del estuario del Golfo de Guayaquil, Ecuador 

Authors

CORRESPONDING

Juan José Alava

jalavasa@sfu.ca

1

1

Fundación Natura Capítulo Guayaquil, Av. Carlos Julio Arosemena Km. 2.5. P.O. Box 09-01-11327, Guayaquil, Ecuador

2

2

School of the Environment, University of South Carolina, 901 Sumter Street, 702G Byrnes Building, Columbia, SC 29208 USA *Dirección actual: Environmental Toxicology Research Group, School of Resource & Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada

Raúl I. Carvajal

1

1

Fundación Natura Capítulo Guayaquil, Av. Carlos Julio Arosemena Km. 2.5. P.O. Box 09-01-11327, Guayaquil, Ecuador

Miguel Saavedra

1

1

Fundación Natura Capítulo Guayaquil, Av. Carlos Julio Arosemena Km. 2.5. P.O. Box 09-01-11327, Guayaquil, Ecuador

Abstract

An assessment on the population ecology, distribution and habitat of the American crocodile (Crocodylus acutus) was conducted within the recent protected area “Reserva de producción de fauna manglares El Salado”, Gulf of Guayaquil, Ecuador. The study was developed along 15 km of mangrove channels and tidal creeks, using nocturnal spotlight boat surveys during the dry season (September to December, 2004). About four crocodiles, with a relative abundance of 0.45 ind./km, ranging 0.27–0.63 ind./km, were detected. Crocodiles were aggregated in the final extreme of a tidal creek (Estero Plano Seco), where the water salinity ranged 10.0–28.0 psu and releasing of effluents (>32.0°C) from electric power plants and run-off from urbanized centers have been evidenced. Most of the crocodile sightings occurred during low tide. The population was represented only by adults (50%) and juveniles (50%); subadults and hatchlings were not observed during the study period. The population density found in this study is one of the lowest densities for American crocodile in the American regions. The euryhaline ability and tolerance to inhabit elevated surface water temperature (thermoconformer) confirm the physiological adaptation of this reptile species. More ecologic and population studies are needed to elucidate some gaps and the environmental factors influencing on the species conservation, as well as the establishment of management strategies to ensure its survival.

Key words

 population, density, salinity, temperature, American crocodile

DOWNLOAD ARTICLE

(Tamaño 373 KB)

DOWNLOAD RESOURCES

DOWNLOADS COUNT

78