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RANA CATESBEIANA (Bullfrog). ECUADOR: PROVINCIA DE NAPO: Carretera Puyo-Tena, ca. 50 km (by road) from Puyo (ca. 77º50’W, 01º08’S, ca. 400 m). 18 March 2000. D. F. Cisneros-Heredia, M. Brandt, A. Chiriboga, G. Reck. Universidad San Francisco de Quito, Quito (DFCH-USFQ 750; juvenile active at 1830 h in flooded grassland, ca. 100 m from an abandoned bullfrog farm). Verified by J. M. Touzet. Rana catesbeiana was introduced to Ecuador in 1988 with the importation of 100 adults and 70.000 tadpoles for commercial purposes; and although initially the bullfrog farms were located in western Ecuador, now they are spread along the western and eastern lowlands (ECOLAP. 1998. El Manejo para la Protección y el Uso Sustentable de la Vida Silvestre en el Ecuador. Proyecto INEFAN/GEF act. 20, Quito; Cano et al. 2000. In: La Biodiversidad del Ecuador Informe 2000. Ministerio del Ambiente, EcoCiencia and IUCN.). Specimen reported herein is the first of this alien taxon from outside of farms. This record and observations in the surroundings of Bahía de Caráquez (ca. 80º20’W, 00º40’S, ca. 8 m), province of Manabí, confirm that Bullfrogs are escaping and probably establishing feral populations in Ecuador (tadpoles and amplectant pairs were observed in ditches at the locality in the province of Napo).
Herpetological Review 35(4): 406; 2004
© 2004 by Society for the Study of Amphibians and Reptiles
RANA CATESBEIANA (Bullfrog). ECUADOR: PROVINCIA
DE NAPO: Carretera Puyo-Tena, ca. 50 km (by road) from Puyo
(ca. 77º50W, 01º08S, ca. 400 m). 18 March 2000. D. F.
Cisneros-Heredia, M. Brandt, A. Chiriboga, G. Reck. Universidad
San Francisco de Quito, Quito (DFCH-USFQ 750; juvenile active
at 1830 h in flooded grassland, ca. 100 m from an abandoned
bullfrog farm). Verified by J. M. Touzet. Rana catesbeiana was
introduced to Ecuador in 1988 with the importation of 100 adults
and 70.000 tadpoles for commercial purposes; and although
initially the bullfrog farms were located in western Ecuador, now
they are spread along the western and eastern lowlands (ECOLAP.
1998. El Manejo para la Protección y el Uso Sustentable de la
Vida Silvestre en el Ecuador. Proyecto INEFAN/GEF act. 20,
Quito; Cano et al. 2000. In: La Biodiversidad del Ecuador Informe
2000. Ministerio del Ambiente, EcoCiencia and IUCN.). Specimen
reported herein is the first of this alien taxon from outside of farms.
This record and observations in the surroundings of Bahía de
Caráquez (ca. 80º20W, 00º40S, ca. 8 m), province of Manabí,
confirm that Bullfrogs are escaping and probably establishing feral
populations in Ecuador (tadpoles and amplectant pairs were
observed in ditches at the locality in the province of Napo).
Submitted by DIEGO F. CISNEROS-HEREDIA, College of
Biological and Environmental Sciences, Universidad San Fran-
cisco de Quito, Ave. Interoceánica y calle Diego de Robles, Cam-
pus Cumbayá, Edif. Maxwell. Casilla Postal 17-12-841, Quito,
Ecuador. e-mail: diegofrancisco_cisneros@yahoo.com.
Herpetological Review 35(4), 2004
... It is mainly farmed as a protein source for human consumption, but it has also been released as a biological control agent or as an ornamental species (Jennings and Hayes 1985). In South America, it was introduced to Brazil (Both et al. 2011), Colombia (Rueda-Almonacid 1999, Ecuador (Cisneros-Heredia 2004;Cobos et al. 2015;Valarezo-Aguilar et al. 2016), Peru (Catenazzi and von May 2014), Uruguay (Laufer et al. 2008), Argentina (Sanabria et al. 2011) andVenezuela (Hanselmann et al. 2004). ...
... During the 90's, twenty three farms were established in Ecuadorian Amazonia (sixteen in Zamora Chinchipe, five in Napo, two in Pastaza and two in Morona Santiago) and; six farms in the Ecuadorian Coast (four in Guayas and two in Los Ríos) (Villacis and Zurita 2002). In Amazonia, feral populations of this exotic species were reported nearby an abandoned bullfrog farm in Napo province (Cisneros-Heredia 2004) and in a biological station (CEDAMAZ) located in the Zamora Chinchipe province (Valarezo-Aguilar et al. 2016). In Andes, a feral population of bullfrog was reported in a recreational park in Loja city (Loja province; Cobos et al. 2015). ...
... Previous accounts of L. catesbeianus were restricted to the Amazon (Napo and Zamora Chinchipe), the Andean (Loja) and, the Coast (Manabí) regions of Ecuador (Cisneros-Heredia 2004;Valarezo-Aguilar 2012;Cobos et al. 2015). This new record from Santay Island, in the outermost part of the Guayas river basin, is the first for a feral population inside a protected area or Ramsar site in Ecuador. ...
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The American bullfrog (Lithobates catesbeianus), an amphibian species native to eastern North America, is considered one of the 100 most harmful invasive species in the world. Previous studies document several feral populations in the Amazon and Andean regions of Ecuador. Only few adults have been reported in the Coast region, despite some evidence suggesting its introduction 31 years ago. Using visual and auditory cues, we explored a 490-hectare wetland area at Santay Island, a protected sanctuary and a Ramsar site on the Ecuadorian Coast. Bullfrogs were detected in seven out of 15 sampled ponds in all types of habitats except for mangroves. The low abundance of adults and juveniles suggests a recently established population. This is the first record of a feral population inside a protected area or Ramsar site in Ecuador. In accordance with the Ramsar Convention mission of preserving wetlands, we propose two strategies to manage bullfrogs at Santay Island.
... La provincia de Zamora Chinchipe, es la zona de la amazonia donde existen más ranarios que ninguna otro provincia ecuatoriana (16 de los 31 que existen en el país) (Villacís y Zurita, 2002), en los cuales Ortega (2007) evidenció el escape de individuos jóvenes y adultos hacia los ecosistemas adyacentes. Cisneros-Heredia (2004) reporta una población de rana toro aparentemente establecida en Ecuador, la misma fue registrada en una localidad de la provincia de Napo, Amazonía ecuatoriana. Además, menciona observaciones adicionales de ranas toro escapadas en la provincia de Manabí. ...
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... L. catesbeianus has been widely introduced around the world. In South America, it has been introduced to Brazil (Borges-Martins et al., 2002), Chile (Lever, 2003), Colombia (Rueda Almonacid, 2000), Ecuador (Cisneros- Heredia, 2004), Guayana (Rueda-Almonacid, 1999), Paraguay (Frost, 2009), Perú (Rueda-Almonacid, 1999), Uruguay ( Laufer et al., 2008), and Venezuela ( Hanselmann et al. 2004 We discovered this new population in an agricultural area in Cerro Blanco, Zonda Department, San Juan Province, Argentina (31° 55' S, 68° 70' W; 650 m). The region is part of the phytogeographic province of Monte, which has an arid climate and a mean annual temperature of 17.3 ºC (mean annual minimum and maximum: 10.4 and 25.7 ºC, respectively) and a mean annual rainfall of 89 mm, which falls mainly in summer (Cabrera, 1994). ...
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... En el caso particular de Sudamérica se ha reportado la presencia de poblaciones asilvestradas de esta especie en Brasil (Borges-Martins et al., 2002), Ecuador (Cisneros-Heredia, 2004), Venezuela (Hanselmann et al., 2004), Uruguay (Laufer et al., 2007), Colombia y Perú (Frost, 2008). En Argentina se ha constatado la presencia de poblaciones asilvestradas de Lithobates catesbeianus en las provincias de San Juan (Sanabria et al., 2005) y de Misiones (Pereyra et al., 2006). ...
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