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Amphibians and Reptiles Recorded in the Conservation Area Imiría in the Ucayali Region in Peru

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Amphibians and Reptiles Recorded in the Conservation Area Imiría in the Ucayali Region in Peru Acta Soc. Zool. Bohem. 80: 317–341, 2016 ISSN 1211-376X Amphibians and reptiles recorded in the Conservation Area Imiría in the Ucayali region in Peru Jiří Moravec1,4), Illich Arista Tuanama2), Giussepe Gagliardi Urrutia3) & Václav Gvoždík1) 1) National Museum Prague, Department of Zoology, Cirkusová 1740, CZ–193 00 Praha 9, Czech Republic 2) Urb. El Trébol, Mz. Ñ, Lote 23, Distrito Los Olivos, Lima, Peru 3) Laboratório de Sistemática de Vertebrados, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, 90619-900 Porto Alegre, Brasil 4) corresponding author: [email protected] Received 20 September 2016; accepted 14 December 2016 Published 28 December 2016 Abstract. This study summarizes the faunistic and natural history information for 38 amphibians and 17 species of reptiles recorded in and in the vicinity of the northern part of the Regional Conservation Area Imiría (Region Ucayali, Peru). Considerable extensions in ranges of Pristimantis delius Duellman et Mendelson, 1995 (Craugastoridae) and Osteocephalus yasuni Ron et Pramuk, 1999 (Hylidae) are documented. Current knowledge of the local herpetofauna is discussed and the importance of the conservation area for the protection of the regional flora and fauna is highlighted. Key words. Biogeography, species diversity, habitat conservation, Amphibia, Reptilia, Amazonia. INTRODUCTION The Regional Conservation Area Imiría (Área de Conservación Regional Imiría) managed by the Regional government of Ucayali, is located on the right bank of the Ucayali River within the watersheds of the rivers Tamaya and Inamapuya (District Masisea, Province Coronel Portillo, Region Ucayali, Peru). This conservation area was founded in June 2010 in order to protect the ecosystem of humid and seasonally flooded lowland forests, local natural resources and the esthe- tical value of the landscape. It covers an area of 135,737.52 ha (including the large black-water lakes Laguna Imiría and Laguna Chauya). Fundamental data on the history, mission and geography of the Regional Conservation Area Imiría and data on its flora and fauna are summarized in the “Plan Maestro” of the area (GRU 2014). It is expected that anthropogenic pressure on the area will increase in the near future as a consequence of the plan to connect the city of Pucallpa with the Brazilian road network (Schick et al. 2016). In cooperation with the Regional government of Ucayali in Pucallpa two short-term surveys of the amphibian and reptilian fauna were carried out in the northwestern part of the Regional Conservation Area Imiría and in the vicinity of its northern part (surroundings of the community of Masisea). The primary goals of the surveys were: (i) to contribute to the knowledge of the local species diversity of amphibians and reptiles and (ii) to evaluate the importance of the Regional Conservation Area Imiría for the conservation of the unique biodiversity of lowland rainforests in western Amazonia. 317 MATERIAL AND METHODS The field research was done by the first two authors (JM, IAT) in November 2009 and September 2011. In the vicinity of the northern part of the Regional Conservation Area Imiría (RCAI) the amphibian and reptilian faunas were surveyed around the community of Masisea (most frequently in the area of the settlement Nuevo Ceylan located ca. 8 km W of the NW frontier of RCAI, 08° 36’ 18.7” S, 74° 18’ 23.2” W; Fig. 1) on 20–22 November 2009 and on 24 September 2011. The field studies were carried out within a radius of ca. 1000 m around two collecting points (CP) situated ca. 2 km north and ca. 3 km south of the settlement Nuevo Ceylan (CP1: 08° 35’ 25.8” S, 74° 18’ 02.7” W; CP2: 08° 38’ 06.2” S, 74° 18’ 30.5” W; altitude 150–160 m a. s. l.). The landscape surrounding the community of Masisea is a mosaic of open disturbed habitats, pastures, small agricultural fields, secondary growth, inundated grassland, marshes, and small lakes (Figs 2A, B; characterized as an anthropogenic area in the Fig. 1). In RCAI amphibians and reptiles were collected on 23–24 November 2009 and photographically documented on 25–30 September 2011. The field studies were carried out around five collecting points (radius up to 500 m) located along an Fig. 1. Schematic map of the northern part of the Regional Conservation Area Imiría (Region Ucayali, Peru) and its vicinity. Delineation of the Conservation Area is outlined by a red line; yellow triangles 1–7 indicate collecting points CP1–CP7. See text for more details. 318 ca. 6 km long transect (CP3: 08° 44’ 54.7” S, 74° 20’ 57.6” W; CP4: 08° 45’ 28.4” S, 74° 20’ 22.5” W; CP5: 08° 46’ 26.7” S, 74° 20’ 17.5” W; CP6: 08° 46’ 50.3” S, 74° 20’ 08.5” W; CP7: 08° 47’ 49.9” S, 74° 19’ 44.0” W; altitude 170–175 m a. s. l.; Fig. 1). The transect was marked out along a forest road (Fig. 3A) connecting the community of Masisea on the Ucayali River with the settlement of Caimito on the northern bank of Laguna Imiría (08° 51’ 23.6” S, 74° 18’ 56.3” W). The distance between the collecting points CP2 and CP3 was ca. 14 km. The area studied was covered by tall seasonally flooded forest (categorized as Amazonian moist forest in the “Plan Maestro” and as Evergreen seasonal flat land forest in southwestern Amazonia in Fig. 1). Despite the selective logging that occurred in the area both in 2009 and in 2011 the forest appeared relatively well preserved. It was characterized by a canopy height of ca. 30 m with emergent trees (inclu- ding Ceiba pentandra [L.] Gaertn.), dense understory and frequent occurrence of palms of the genera Mauritia L.f. (Fig. 3B) and Socratea H. Karst. Several small houses of local settlers and hunters surrounded by crop fields with pineapple, manioc, rice and banana were scattered along the forest road between collecting points CP4 and CP5. In the record of species, families, genera and species are listed in alphabetical order. Selected voucher specimens as well as photographs are deposited in the herpetological collections of the National Museum Prague (NMP) and in Museo de Historia Natural de la Universidad Nacional de San Antonio Abad del Cusco. To facilitate genetic comparisons, tissue samples from five specimens of three species of Osteocephalus Steindach- ner, 1862 collected at CP3 were taken from preserved voucher specimens NMP6V 74441, NMP6V 74442/1–2, NMP6V 74442/4 and NMP6V 74913. The genomic DNA was extracted using a commercial kit. The mitochondrial fragment covering a portion of the 12S rRNA, complete tRNA-Val and a portion of the 16S rRNA genes (12S-16S rRNA, 1932 bp) was targeted, or alternatively two separate fragments of the 12S rRNA (12S, 352 bp) and 16S rRNA (16S, 549 bp) genes if the whole long fragment was not successfully amplified. For primers, PCR conditions and more details see Moravec et al. (2009). New nucleotide sequences were deposited in GenBank (KY211975–KY211981). The nomenclature and higher systematic categories used follow Frost (2016) and Uetz et al. (2016). The only exception is the generic name Mabuya, as proposed by Pinto-Sánchez et al. (2015). SPECIES RECORD Amphibia Anura Aromobatidae Allobates femoralis (Boulenger, 1884) (Figs 4A, B) Locality. RCAI (2011). Two individuals observed in closed-canopy forest around CP5 and CP6. Bufonidae Rhinella marina (Linnaeus, 1758) (Fig. 4C) Localities. Masisea (2009, 2011), RCAI (2011). Common species in secondary habitats around the community at Masisea (CP2); associated with open habitats along the forest road in RCAI (CP3–7). Rhinella poeppigii (Tschudi, 1845) (Fig. 4D) Locality. Masisea (2009, 2011). Observed only in non-inundated habitats around the community Masisea, where it was recorded calling at the same water bodies as Rhinella marina. 319 Rhinella sp. (R. margaritifera complex) (Figs 4E, F) Localities. RCAI (2009, 2011). Material. NMP6V 74915. Relatively common species in forested habitats. A group of 4–5 males was recorded calling after a shower at night on 27 September 2011. The calling males aggregated around a small temporary puddle (partly overgrown by herbaceous vegetation and low bushes) situated close to a forest road. Based on a comparison of the mitochondrial 16S rRNA gene sequences, the collected subadult specimen NMP6V 74915, GenBank: KF992143 (Moravec et al. 2014) was genetically similar (1.3% uncorrected p-distance) to a specimen of the Rhinella margaritifera complex (KU 215145) from Madre de Dios (Peru) analyzed by Pramuk (2006). Adult males (n=2) examined had the fol- lowing characters: SVL (snout-vent length) 53 and 59 mm; snout pointed in dorsal view, protruding beyond the margin of lip, bearing rostral keel; canthal crest not elevated, supraorbital and widely expanded supratympanic crests continuous; tympanum large, oval vertically; bony protrusion at angle of jaw large; protruding neural crest of vertebrae present; parotid glands narrowly triangular, protruding laterally, incorporated into lateral row of tubercles; skin on dorsum tubercular. Craugastoridae Pristimantis delius Duellman et Mendelson, 1995 (Figs 4G, H) Locality. RCAI (2011). An adult individual observed sitting on vegetation ca. 1 m above the ground at CP5. This is the first record ofPristimantis delius in the Amazonian lowland of central Peru. The finding extends the range of this species by ca. 230 km SW of the closest known locality (Cruseiro do Sul, Acre, Brazil; López-Rojas et al. 2013). Dendrobatidae Ameerega cf. hahneli (Boulenger, 1884) (Figs 5A, B) Locality. RCAI (2011). A single individual observed during the day at CP5. It is difficult to distinguish betweenAmeerega hahneli and morphologically similar A. altamazonica Twomey et Brown, 2008 without an adver- tisement-call comparison. Nevertheless, niche models published by Twomey & Brown (2008) indicate that the RCAI should provide better environmental conditions for A.
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