Article

El “cocodrilo de tumbes” (Crocodylus acutus Cuvier 1807): estudio preliminar de su estado actual en el Norte de Perú

Ecología Aplicada 01/2003;
Source: DOAJ

ABSTRACT

De Junio del 2002 a Febrero del 2003, se han realizado recorridos en la zona norte de Perú, específicamente en la región de Tumbes, para conocer el estado actual de Crocodylus acutus, mediante recorridos diurnos y nocturnos, estimando una densidad de 0.18 ind/Km siendo una de las densidades más bajas de C. acutus en su ámbito de distribución. La estructura poblacional es de 82.61% juveniles, 4.35% de sub-adultos y 13.04% de adultos, siendo similar a lo reportado en otras poblaciones.

Download full-text

Full-text

Available from: Armando H. Escobedo-Galván, Nov 05, 2014
  • Source
    • "which are higher than population studies from other countries (Escobedo and Mejia 2003, Platt et al. 2004, Carvajal et al. 2005). The representativeness of the current results indicates that populations across the Caribbean coast of Colombia are unevenly distributed across the area. "

    Full-text · Article · Jan 2008
  • Source
    • "Hasta finales de la década de los noventa, la información científica sobre esta especie no estuvo disponible, pues hubo ausencia de investigación en países como El Salvador, Guatemala, Panamá, Colombia, Ecuador y Perú (Ross 1998). Recientemente, a comienzos del 2000, se han llevado a cabo estudios de campo sobre su abundancia poblacional en Perú (Escobedo & Mejía 2003) y Colombia (Barrera 2004 6 ). Este estudio contribuye con la obtención de datos científicos in situ relevantes a la ecología, estimación poblacional y distribución del cocodrilo de la costa en el área protegida " Reserva de Carvajal et al. "
    [Show abstract] [Hide abstract]
    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.
    Full-text · Article · Dec 2005 · Revista de Biologia Marina Y Oceanografia
  • Source
    • "Hasta finales de la década de los noventa, la información científica sobre esta especie no estuvo disponible, pues hubo ausencia de investigación en países como El Salvador, Guatemala, Panamá, Colombia, Ecuador y Perú (Ross 1998). Recientemente, a comienzos del 2000, se han llevado a cabo estudios de campo sobre su abundancia poblacional en Perú (Escobedo & Mejía 2003) y Colombia (Barrera 2004 6 ). Este estudio contribuye con la obtención de datos científicos in situ relevantes a la ecología, estimación poblacional y distribución del cocodrilo de la costa en el área protegida " Reserva de Carvajal et al. "
    [Show abstract] [Hide abstract]
    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.
    Full-text · Article · Jan 2005 · Revista de Biologia Marina Y Oceanografia
Show more