Golden Coquí, Coquí Dorado
Eleutherodactylus jasperi can be distinguished from other Eleutherodactylus in Puerto Rico by its golden ground color without dorsal patterning, by its translucent venter without dark pigmentation, and by the lack of prevomerine teeth (Drewry and Jones, 1976).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Puerto Rico
Life History, Abundance, Activity, and Special Behaviors
During the mating season, males give off a call that sounds like "tuit-tuit-tuit-tuit" (Duellman, 2003). A single call sequence lasts for between ten seconds and two minutes. The first call of the sequence has one to two notes, with successive calls increasing up to a maximum of four to six notes, and maintaining at that maximum number until the end of the call sequence. Notes have approximately the same duration. They consist of relatively pure tones of about 5 kHz. The advertisement calls seem to be the same as territorial calls, as there was no difference between calls made by solitary calling males and those given by multiple males placed together in a single collecting bag. Males placed together in a bag alternately called and engaged in biting each other (Drewry and Jones, 1976).
Call sequences are somewhat synchronized between neighboring males. Eleutherodactylus jasperi is more difficult to distinguish in a multi-species chorus, as it makes somewhat softer calls than other frog species in the same habitat. However, it calls throughout the night, unlike other species which subside between midnight and dawn (Drewry and Jones, 1976).
Eleutherodactylus jasperi is ovoviviparous. It is the only live-bearing species in the genus Eleutherodactylus and family Leptodactylidae, and thus presumably also the only species in that genus and family to have internal fertilization. The only other species of frogs known to retain developing embryos within the oviducts are in the genus Nectophrynoides, in the family Bufonidae (Wake, 1978).
Gravid females have been collected between April and August, containing three to six mature eggs (Drewry and Jones, 1976). Mature eggs are large, 3.3 to 5 mm in diameter (Drewry and Jones, 1976; Wake, 1978). Once fertilized, eggs are retained within a chamber, essentially a uterus, formed of fused portions of the oviducts (Wake, 1978). The embryos take about a month to develop (Drewry and Jones, 1976). As is characteristic of other species with direct development, Eleutherodactylus jasperi embryos have poorly developed mouthparts, lacking denticles and adhesive organs (Wake, 1978). The larval spiracle and external gills are present but transitory, and rates of development are also modified (Wake, 1978). Approximately thirty-three days after amplexus, three to five tiny, fully metamorphosed froglets are born (Drewry and Jones, 1976). The froglets of this species have a small egg tooth and a large, thin, highly vascularized fan-like tail (Wake, 1978). The tail may function in intra-oviducal gaseous exchange (Wake, 1978). The source of nutrition for developing embryos appears to be egg yolk and not maternal secretions, as there is no evidence of a placenta or maternal secretions, and unresorbed yolk is still present in froglets after birth (Wake, 1978). Thus E. jasperi is classified as ovoviviparous, and not viviparous.
Females may reproduce more than once a year, since dissected females had two visible size classes of eggs within the ovaries (Wake, 1978). Although gravid females were collected between April and August, Wake (1978) noted that year-round collections had not been done. Thus it is not known whether reproduction in this species is seasonal or if it occurs throughout the year.
Subadults have been found in the same plant with females, implying that dispersal does not occur until the juvenile is older (Drewry and Jones, 1976).
This species preys mostly on small arthropods (Duellman, 2003).
Trends and Threats
Possible reasons for amphibian decline
General habitat alteration and loss
This species was first described by Drewry and Jones (1976). It was named for one of the collectors of the holotype, Dr. Jasper J. Loftus-Hills, of New Victoria, Australia. Dr. Loftus-Hills passed away in 1974 at the age of 28 from an automobile accident. (Drewry and Jones, 1976).
Burrowes, P. A., Joglar, R. L., and Green, D. E. (2004). ''Potential causes for amphibian declines in Puerto Rico.'' Herpetologica, 60, 141-154.
Drewry, G. E., and Jones, K. L. (1976). ''A new ovoviviparous frog, Eleutherodactylus jasperi (Amphibia, Anura, Leptodactylidae) from Puerto Rico.'' Journal of Herpetology, 10(3), 161-165.
Duellman, W. E. (2003). ''Golden coqui, Eleutherodactylus jasperi.'' Grzimek's Animal Life Encyclopedia, Volume 6, Amphibians. 2nd edition. M. Hutchins, W. E. Duellman, and N. Schlager, eds., Gale Group, Farmington Hills, Michigan.
Moreno, J. A. (1991). ''Status survey of the Golden Coqui, Eleutherodactylus jasperi.'' Status y Distribución de los Anfibios y Reptiles de Puerto Rico, Publicación Científica Miscelaneous No. 1. J.A. Moreno, eds., Departamento de Recursos Naturales, San Juan, Puerto Rico, 37-41.
Wake, M. H. (1978). ''The reproductive biology of Eleutherodactylus jasperi (Amphibia, Anura, Leptodactylidae, with comments on the evolution of live-bearing systems.'' Journal of Herpetology, 12(2), 121-133.
Written by Kellie Whittaker, Peera Chantasirivisal (biologist AT earthlink.net), UC Berkeley
First submitted 2005-11-10
Edited by Kellie Whittaker (2008-11-14)
Species Account Citation: AmphibiaWeb 2008 Eleutherodactylus jasperi: Golden Coquí <http://amphibiaweb.org/species/2988> University of California, Berkeley, CA, USA. Accessed Dec 15, 2018.
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Citation: AmphibiaWeb. 2018. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 15 Dec 2018.
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