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Common House Gecl~O Hemidactylus /Renatus Scljegel (Squamata: Gelj~Onidae) in Cuba, with Comments on the Other Colonizing Species of the Genus in the Island

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Common House Gecl~O Hemidactylus /Renatus Scljegel (Squamata: Gelj~Onidae) in Cuba, with Comments on the Other Colonizing Species of the Genus in the Island WWW.IRCF.ORG/REPTILESANDAMPHIBIANSJOURNAL IRCF REPTILES &AMPHIBIANS • 21(1):30-34 • MAR2014 CONSERVATION AND NATURAL HISTORY INTRODUCED SPECIES A New Locality Record for the Common House Gecl~o Hemidactylus /renatus SclJegel (Squamata: GelJ~onidae) in Cuba, with Comments on the Other Colonizing Species of the Genus in the Island Luis M. Díaz Museo Nacional de Historia Natural de Cuba, Obispo #61, esquina Oficios, Plaza de Armas, Habana Vieja, CP 10100, Cuba ([email protected] and luisfi:[email protected]) Photographs by thc author. he Common House Gecko (Hemidactylus frenatus Arnold 2006, Bomford et al. 2009). Shigesada et al. (1995) T Schlegel) is one of several species in the genus that have suggested that introduced species of Hemidactylus exhibit a colonized many places in both the Eastern and Western stratified diffusion invasion by combining human-assisted Hemispheres (i.e., Townsend and Krysko 2003, Carranza transportation and a gradual colonization of neighboring and Arnold 2006, Bomford et al. 2009, Kraus 2009, Caicedo­ lo calities (Meshaka 1995, Caicedo-Portilla and Dulcey-Cala Portilla and Dulcey-Cala 201 L Powell et al. 20 1 L Ota and 2011). For example, vehicles transporting household furni­ Whitaker 2013). Those introductions were largely medi­ ture and other items are known to contribute to dispersion ated by human activity and, as a consequence, the species (e.g., Somma et al. 20 13). An advantage for H frenatus in has increased its range considerably during the last century particular as a successful colonizer is the capacity for long­ (Rodder et al. 2008). The presence of these geckos was docu­ term sperm storage by females (Murphy-Walker and Haley mented recently in the Dominican Republic (Scantlebury et 1996, Yamamoto and Ota 2006). Herein, besides reporting al. 2010) and from the U.S. Naval Base at Guantánamo in H frenatus from a new locality in Cuba, I discuss the status eastern Cuba (Powell et al. 2011 ). No other localities have of the other introduced species in the genus and the resultant been reported for this species in Cuba. inter-specific dynamics during the past few decades. Other non-native species of Hemidactylus that have On 6 and 7 December 2013, during a weekend stay become established on the island are the Antillean House in the Hotel Husa Cayo Santa María (Fig. 2), Cayo Santa Gecko (H angulatus Hallowell1), the Tropical House Gecko María, Villa Clara Province, more than three dozen H frena­ (H. mabouia Moreau de Jonnes), and the Mediterranean tus, including adults and juveniles, were observed in less than House Gecko (H turcicus [Linnaeus]) (Fig. 1), which, two hours on three buildings and in the hotel lobby. Ariatna together with H frenatus, are among the species in the genus Linares and I collected nine voucher specimens, which were with broad human-mediated distributions (Carranza and deposited in the collection of the Museo Nacional de Historia Natural de Cuba (MNHNCu 5060~5068). Aaron M. Bauer 1 The Afi:ican H angulatus species comple:x dearly includes the West Indian popu­ confirmed the identity of the specimens from photographs. lations originally described as a subspecies of Brook's House Gecko (H. brookii Considering the local abundance of H. frenatus on Gray) by Meerwarth (1901). Subsequent references to these populations have fol­ lowcd Meerwarth in rcferring to thcm as H. brookii haitianus (c.g., Klugc 1969, Cayo Santa María, the population was probably established Powdl and Maxey 1990, Lynxwiler etal. 1991), but others have used H haiti4nus sorne years ago. The hotel was built in 2008 (formerly as the (Powcll 1993, Powdl and Parmcrlce 1993, Powdl et al. 1996, Estrada 2012) or H angulatus (Hcndcrson and Powdl 2009), the latter afi:er taxonomic revisions Hotel Barceló Cayo Santa María), and the building mate­ in Carranza andArnold (2006), Weiss and Hedges (2007), and Rosler and Glaw rials included wood imponed from locations unknown. (2010). However, further studies ofAfi:ican populations are nccessary to resolve thc ambiguity rcgarding the taxonomic status of populations in the Western Shipments of lumber are a known method of introduction Hcmisphcre (sce also the subsequent footnote regarding populations in Colombia). for these commensal geckos (Powell 2004). We were unable Copynght © 2014. Lu1z M Df,z. Al i nghts reserved. 30 INTRODUCED SPECIES IRCF REPTILES & AMPHIBIANS • 21 (1 ):30-34 • MAR 2014 Fig. l. Three species of Hemidactylus now established in Cuba: (A) Hemidactylus angulatus, adult male from Lawton, La Habana, with distinctive dark band­ ing; (B) H angulatus, juvenile from same locality (note the X-shaped dorsal figures surrounded by paler tubercles); (C) H ftenatus, adult male (MNHNCu 5060) from Hotel Husa Cayo Santa María, Cayo Santa María, Villa Clara, with obvious longitudinal dark zones and interspersed light spots; (D) H ftenatus, same male in light phase; (E) H mabouia, adult female, from Lawton, La Habana, with a typical chevron pattern; (F) H mabouia, adult male, same locality, with a poorly defined pattern. to verify the presence of H ftenatus in nearby hotels and other 5069-5070), of which only three individuals were seen in two tourism facilities on the cay. The presence of H ftenatus on nights, two of them with regenerated tails. Although unlikely, Cayo Santa María and at the Naval Base at Guantánamo since this species has been established in Cuba for sorne time, likely reflect two different pathways of introduction. its relative scarcity could indicate that this species arrived at The other house gecko present at the hotel on Cayo this locality subsequent to H ftenatus. No previous records of Santa María was H mabouia (voucher specimens MNHNCu H mabouia exist for this cay and no base-line data are avail- 31 INTRODUCED SPECIES IRCF REPTILES & AMPHIBIANS • 21 (1 ):30-34 • MAR 2014 Fig. 2. Partial view of the Hotel Husa Cayo Santa María, Villa Clara Province (left), where Hemidactylus ftenatus (right) was commonly seen on building walls, roofs, and around electric lights. able for comparing the current population status of the spe­ The history and dynarnics of colonization of Hemidactylus cies with that prior to the introduction of H ftenatus. lnstead, geckos in Cuba have been poorly studied, largely due to low the relative scarcity probably demonstrates the competitive collection efforts and frequent species misidentifications. dominance of H ftenatus and the possible displacement of H However, alien geckos in Cuba appear to have exhibited a mabouia. Species displacement and replacement among intro­ pattern of displacement and replacement similar to those duced Hemidactylus has occurred in several regions. Meshaka described above. Leavitt (1933) first reported the presence of et al. (1994) reported H mabouia as an established member H turcicus, and at least six localities in Cuba were recorded of the Florida herpetofauna and suggested that its rapid range by Schwartz and Henderson (1991). However, no recent expansion indicated that it might be a more successful colo­ records exist and the species probably is no longer established. nizer than previously introduced H turcicus and H garnotii. Hemidactylus angulatuswas abundant in Havana until the late The authors noted that the once common H. turcicus was 1990s, but H mabouia became the most frequendy encoun­ nearly absent at localities where H mabouia had been intro­ tered species during the 2000s, displacing (but not yet replac­ duced. Short and Petren (2011) demonstrated a complete ing) the former. Figure 3 shows that H mabouia has a wider displacement of H garnotii by H mabouia in less than seven distribution in Cuba than previously reported (Schwartz and years at sorne localities of Florida, with H mabouia popula­ Henderson 1991, Powell et al. 1998), and populations seem to tions increasing ata very rapid rate (>10% per year). Powell be increasing rapidly across the island. Hemidactylus angulatus et al. (1998) reported the displacement of H mabouia by is the species with the widest distribution on the island (Fig. H ftenatus in the Los T uxdas region of Mexico. Caicedo­ 3) and is the only member of the genus in localities where H Portilla and Dulcey-Cala (2011) observed that populations mabouia is absent. When both species are found together, H of H angulatus2 in Colombia showed a notable decline after angulatus usually is less abundant than H mabouia. Estrada the recent introduction of H ftenatus. Based on dimate data, (2012) reported H angulatus in Cayo Santa María, but we Rodder et al. (2008) predicted that the extent of dimatically did not find it in December 2013 at the Hotel Husa Cayo suitable areas and the potential distribution of H ftenatuswill Santa María. This probably represents another species succes­ increase on a global scale, whereas those of H mabouia will sion, with H angulatus being the first introduced species, later decrease. being displaced or replaced by H mabouia, and now H ftena­ tus is the most abundant species there. Hemidactylus angulatus was the only species found in November 2013 at the Hotel 2 Colombian house geckos were originally described as a distinct species Sol Cayo Coco, Cayo Coco, Ciego de Ávila Province. With (Hemidactlylus leightont) by Boulenger (1911). Recent references have variously referred to these populations, undoubtedly pan of the African H angulatus spe­ the apparendy recent introduction of H ftenatus into Cuba, cies complex, as H brookii haitianus (Mechler 1968), H brooki leightoni (Kluge the status ofboth H angulatusand H mabouiamight change 1969, Powell and Maxey 1990), H leightoni (Powell et al. 1996, by implication; Rivas Fuenmayor 2002), H angulatus (Caicedo-Portilla and Dulcey-Cala 2011), if H ftenatus gradually colonizes new territories and achieves and H angulatus leightoni (Rosler and Glaw 201 O). As far Antillean populations a wider distribution. (see previous faotnote), the status of populations in the Western Hemisphere must await further studies of African populations befare the taxonomic status of The impact of introduced geckos on native Cuban spe­ Antillean and Colombian populations can be resolved.
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