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- Lafferriere, Natalia A. Rossi, et al.
(författare)
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Multiple Paternity in a Reintroduced Population of the Orinoco Crocodile (Crocodylus intermedius) at the El Frio Biological Station, Venezuela
- 2016
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Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 11:3
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Tidskriftsartikel (refereegranskat)abstract
- The success of a reintroduction program is determined by the ability of individuals to reproduce and thrive. Hence, an understanding of the mating system and breeding strategies of reintroduced species can be critical to the success, evaluation and effective management of reintroduction programs. As one of the most threatened crocodile species in the world, the Orinoco crocodile (Crocodylus intermedius) has been reduced to only a few wild populations in the Llanos of Venezuela and Colombia. One of these populations was founded by reintroduction at Cano Macanillal and La Ramera lagoon within the El Frio Biological Station, Venezuela. Twenty egg clutches of C. intermedius were collected at the El Frio Biological Station for incubation in the lab and release of juveniles after one year. Analyzing 17 polymorphic microsatellite loci from 335 hatchlings we found multiple paternity in C. intermedius, with half of the 20 clutches fathered by two or three males. Sixteen mothers and 14 fathers were inferred by reconstruction of multilocus parental genotypes. Our findings showed skewed paternal contributions to multiple-sired clutches in four of the clutches (40%), leading to an overall unequal contribution of offspring among fathers with six of the 14 inferred males fathering 90% of the total offspring, and three of those six males fathering more than 70% of the total offspring. Our results provide the first evidence of multiple paternity occurring in the Orinoco crocodile and confirm the success of reintroduction efforts of this critically endangered species in the El Frio Biological Station, Venezuela.
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| 4. |
- Castroviejo-Fisher, Santiago, et al.
(författare)
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A new species of Hyalinobatrachium (Anura: Centrolenidae) from the Amazonian slopes of the central Andes with comments on the diversity of the genus in the area
- 2009
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Ingår i: Zootaxa. - 1175-5326 .- 1175-5334. ; :2143, s. 24-44
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Tidskriftsartikel (refereegranskat)abstract
- We describe a new species of Hyalinobatrachium from the Amazonian slopes of the Andes in Peru and Bolivia on the basis of morphological, bioacoustic and genetic characteristics. Hyalinobatrachium carlesvilai sp. nov. can be distinguished from other species of Hyalinobatrachium by the combination of the following characters: (1) truncate snout in dorsal and lateral view; (2) white pericardium; (3) enameled dorsal, tarsal and cloacal folds; (4) hand webbing formula III 2(-) -1(+) IV; (5) iris cream; (6) advertisement call consisting of a single, frequency-modulated note with a pulsed section followed by a tonal section. The new species had been previously identified as Hyalinobatrachium munozorum and H. bergeri. The advertisement call of the new species was previously assigned to H. bergeri. Here we describe the previously unknown call of Hyalinobatrachium bergeri. Additionally, we study the taxonomic status of H. lemur and H. pellucidum and place the former as synonym of the later. We extend the distribution of H. pellucidum to Departamento Cusco in southern Peru.
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| 5. |
- Castroviejo-Fisher, Santiago, et al.
(författare)
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A new species of Hyalinobatrachium (Centrolenidae : Anura) from Serrania de Perija, Venezuela
- 2007
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Ingår i: Zootaxa. - 1175-5326 .- 1175-5334. ; :1441, s. 51-62
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Tidskriftsartikel (refereegranskat)abstract
- We describe a new species of Hyalinobatrachium from Serran a de Perija, Estado de Zulia, Venezuela. The new species is placed in the Hyalinobatrachium fleischmanni group and can be differentiated from all other species of Hyalinobatrachium by having small enamelled glands on the lower part of the upper lip and on the skin covering the jaw, iris with a horizontal dark band that connects the pupil with the lateral edges of the eye, marked ulnar and tarsal white enamelled folds, extensive webbing between fingers and between toes, white pericardium and an advertisement call formed by a high-pitched single note composed of two parts: a group of modulated pulses increasing in frequency followed by a long and modulated sound at a constant frequency.
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| 8. |
- Castroviejo-Fisher, Santiago, et al.
(författare)
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Resurrection of Hyalinobatrachium orocostale and notes on the Hyalinobatrachium orientale species complex (Anura: Centrolenidae)
- 2008
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Ingår i: Herpetologica. - 0018-0831 .- 1938-5099. ; 64:4, s. 472-484
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Tidskriftsartikel (refereegranskat)abstract
- Hyalinobatrachium orientale has a complex taxonomic history suggesting that more than one species could be under this name. In this review, we try to clarify the current taxonomic status of this species by means of morphological, bioacoustic, and mitochondrial DNA sequence comparisons of specimens from Tobago Island and the Venezuelan Cordillera de la Costa (Oriental Sector, Cordillera del Litoral and Cordillera del Interior). Our data support the resurrection of Hyalinobatrachium orocostale, restricted to the Cordillera del Interior. Additionally, specimens from Cordillera del Litoral and Oriental Sector do not form a monophyletic group; hence, we define as Hyalinobatrachium sp. the populations from Cordillera del Litoral and H. orientale sensu stricto the populations from the Oriental Sector. Preliminary bioacoustic and morphological analyses indicate that the populations from Tobago are conspecific with Hyalinobatrachium orientale sensu stricto.
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| 9. |
- Castroviejo-Fisher, Santiago, 1979-
(författare)
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Species Limits, and Evolutionary History of Glassfrogs
- 2009
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Recognizing the mechanisms of speciation and the limits of species is essential to understand the origin of biodiversity and how to conserve it. The general aims of my investigations during my doctoral studies were two-fold: to study evolutionary patterns and processes, and to provide specific and superspecific taxonomic classifications that try to reflect evolutionary history. I have focused my research on anurans in their biodiversity hotspot, the American Tropics. I have used morphological, behavioral (mating calls), and genetic (DNA sequences) characters to study species boundaries between frogs of the genus Pristimantis and the family Centrolenidae (glassfrogs). The results show that the exclusive use of single lines of evidence or the application of arbitrary thresholds impair and bias our ability to recognize new species and limit the possibility to understand evolutionary processes. Only an integrative approach combining every source of evidence provides the necessary feedback to discover all species and test their identity by comparing independent sets of data. This approach further allows identifying those species that probably represent stable comparative units (well supported species hypotheses) and to flag taxa that require further assessment. Phylogenetic reconstructions based on seven nuclear and mitochondrial genes for about 100 species of glassfrogs revealed that previous hypotheses of relationships were mislead by rampant convergent evolution at the phenotypic level. None of the previously suggested classifications fit with the reconstructed evolutionary history. Consequently, we proposed a new classification consistent with this phylogeny. I also studied the tempo and mode of diversification among glassfrogs. Based on sequences from ten genes in 87 species, I estimated species divergence times, age-range correlation between sister species, and reconstructed ancestral areas and dispersal/vicariance events. The results revealed a complex model of diversification where geographical isolation seems to be the dominant scenario for speciation and only clades of altitudinal generalists have been able to spread across the Neotropical rainforests.
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| 10. |
- Castroviejo-Fisher, Santiago, et al.
(författare)
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Species status of Centrolene lema Duellman & Señaris, 2003 (Amphibia: Centrolenidae) revealed by Integrative Taxonomy
- 2009
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Ingår i: Zootaxa. - 1175-5326 .- 1175-5334. ; 1980, s. 16-28
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Tidskriftsartikel (refereegranskat)abstract
- We evaluate the hypothesis of Centrolene lema as a species distinct from C. gorzulae using morphological, bioacousticand genetic comparisons. Our results show that there are no consistent differences in any of these three areas; hence, wepresent C. lema as a synonym of C. gorzulae. Additionally we provide new data on the distribution and ecology of thespecies.
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