Preliminary observations on the circadian variation in site fidelity in Atelopus hoogmoedi (Lescure, 1974) (Anura, Bufonidae).

Amphibian & Reptile Conservation 11(1) [General Section]: 45–50 (e136).

Inhalt:

Anhand von 14 markierten Männchen wurde die Ortstreue von Atelopus hoogmoedi überprüft.

"In conclusion our observations, although sparse, seem to confirm that Atelopus hoogmoedi does indeed show strong diurnal and nocturnal site fidelity, during breeding and non-breeding seasons. Although several hypotheses may explain this, the fact that perch site return rate is the highest after dark supports the predation evasion hypothesis."

nicolai-biblio

Conservation Status of the “Piracanjuba” Brycon orbignyanus (Valenciennes, 1850) (Characiformes, Bryconidae): Basis for Management Programs.

Revista Biodiversidade Brasileira – BioBrasil, 7(1): 18-33,

Volltext: https://revistaeletronica.icmbio.gov.br/BioBR/article/download/612/518

Abstract:

The excessive exploitation of freshwater resources has been caused by many impacts on natural populations, especially on fish. Different factors related to pollution, overfishing, introduction of exotic species, construction of dams, and destruction of riparian vegetation can cause changes on the current populations and interfere with their equilibrium. In this context, Brycon orbignyanus, popularly known as “piracanjuba”, is an endangered fish species affected by overfishing and environmental degradation. The quality of the meat and its aggressive behavior in the practice of sport and professional fishing, occurring concomitantly to continuous changes in the habitat, has resulted in the fast depletion of natural stocks and resulted in its addition to the list of endangered Brazilian fish species. The species has its distribution along the La Plata River basin, which has in its upper parts highly impacted by demographic occupation, dam constructions, and agricultural farm activities in marginal areas. Habitat changes lead the wild groups of this species to shift to less affected regions, being presently restricted to a few far rivers and small tributaries that remain in preserved environmental conditions. In order to obtain a better view of the real situation of B. orbignyanus populations, the aim of this work is the development of effective management programs for the conservation of this species. The article brings together information available in the literature and provides biological and population information about its current geographic distribution, the main threats to the equilibrium in the changing environments of occurrence, the genetic characteristics of populations, and the prospects for use in conservation programs.

oliveira-biblio

Conservation of Brycon orbignyanus natural populations and stocks for their reproductive, genetic, environmental sustainability: A model for species threatened with extinction.

Cien. Inv. Agr. 36(2):191-208. http://dx.doi.org/10.4067/S0718-16202009000200004

Abstract:

Several ecological and climatic factors, especially those related to human activities, have been contributing to the disappearance of natural populations of piracanjuba (Brycon orbignyanus). Due to the importance of these fish to the ecosystems in which they are located and their qualities of fast growth and ability to adapt to controlled environments, producers have expressed increased interest in recent years in using this species, with particular aims of increasing production, and participation in conservation programs. In this study, strategies for the sustainable management of B. orbignyanus are idealized and discussed, with the goals of perfecting the reproductive, genetic, environmental and sanitary management of this species and suggestions for improving monitoring stocks maintained in captivity and natural populations. These strategies can be used as models for other migratory species threatened with extinction.

loper-biblio; lopera-barrero-biblio

A phylogenetic analysis of Brycon and Henochilus (Characiformes, Characidae, Bryconinae) based on the mitochondrial gene 16S rRNA.

Genetics and Molecular Biology, 31 (1,  suppl): 366-371

Abstract:

The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H. wheatlandii) found in the upper Rio Doce basin. In the present study, partial sequences of the mitochondrial gene 16S were obtained for fifteen species of Brycon and for Henochilus wheatlandii. The results showed that the genus Brycon is paraphyletic, since Henochilus is the sister-group of B. ferox and B. insignis. The most basal species analyzed were the trans-Andean species B. henni, B. petrosus, and B. chagrensis.

wagner-biblio

The endangered species Brycon orbignyanus: genetic analysis and definition of priority areas for conservation.

Environ Biol Fish 98: 1845–1855. https://doi.org/10.1007/s10641-015-0402-8

Abstract:

Currently, biodiversity is threatened by several factors often associated with human population growth and the extension of areas occupied by human activity. In particular, freshwater fish fauna is affected by overfishing, deforestation, water pollution, introduction of exotic species and habitat fragmentation promoted by hydroelectric dams, among other environmental impact factors. Several action plans to preserve ichthyofauna biodiversity have been adopted; however, these plans frequently cover only a small number of species, and decisions are often made without strong scientific support. This study aimed to evaluate the genetic aspects of wild groups of Brycon orbignyanus, an endangered fish species, using microsatellites and D-loop regions to identify the genetic structure of the samples and to establish priority areas for conservation based on the genetic patterns of this species. The results indicated that the samples showed levels of genetic variability compatible with others studies with Neotropical fishes. However, the results obtained in the analysis of molecular variance (AMOVA) for microsatellites (F ST = 0.258) and D-loop (F ST = 0.234) and the interpopulation fixation index revealed that B. orbignyanus was structured in different subpopulations in the La Plata River basin; the areas with better environmental conditions also showed subgroups with higher rates of genetic variability. Future conservation actions addressing these sites should consider two different management units: the complex formed by the Ivinhema River, Upper Paraná, Camargo Port and Ilha Grande groups; and the complex formed by the Verde River and Sucuriu River groups.

ashikaga-biblio

Taxonomic revision of the pampas cat Leopardus colocola complex (Carnivora: Felidae): an integrative approach.

Zoological Journal of the Linnean Society
DOI: 10.1093/zoolinnean/zlaa043/5848237

Abstract:

The pampas cat Leopardus colocola has been subject to conflicting classifications over the years. Currently, one polytypic species with seven subspecies is recognized, but integrative taxonomic study for this debated group has never been done. Here, we combine the broadest morphological coverage of the pampas cat to date with molecular data and ecological niche models to clarify its species composition and test the validity of recently proposed subspecies. The multiple lines of evidence derived from morphology, molecular, biogeography and climatic niche datasets converged on the recognition of five monotypic species: L. braccatus, L. colocola, L. garleppi (including thomasi, budini, steinbachi, crespoi and wolffsohni as synonyms), L. munoai and L. pajeros (including crucina as synonym). These five species are morphologically diagnosable based on skin and skull traits, have evolved in distinct climatic niche spaces and were recovered in molecular species delimitation. Contrary to previous taxonomic arrangements, we do not recognize subspecies in pampas cats. To objectively define the two most controversial species, we designate neotypes for L. colocola and L. pajeros. The diversification of pampas cats is associated with Middle Pleistocene glaciations, but additional genetic samples from the central Andean region are still needed to conclusively reconstruct its evolutionary history.

nascimento-biblio

Vogelwelt von Südamerika I.Teil.

167 Seiten, 80 Farbtafeln. Verlag Littera Scripta Manet, Gorssel.

Der Band enthält Reproduktionen aus den Werken von John GOULD (1822-35):
A Monograph of the Odontophorinae
A Monograph of the Trogonidae
A Monograph of the Ramphastidae

Er ist Teil einer Serie mit insgesamt 800 Bildtafeln.

rutgers-biblio

On the identity of Bufo diptychus Cope, 1862 (Anura: Bufonidae).

Zootaxa 4442 (1): 161
ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)

Abstract:

The enigmatic toad Bufo diptychus was described by Cope (1862) based on a single individual (USNM 5841, now lost) of about 25 mm of SVL, collected during the expedition to La Plata River and tributaries, conducted by Captain Page between 1853 and 1856. As no dwarf species of toad was ever recorded in the surveyed area, and based on some tips that arise from Page’s narrative, we postulate that the description was based on a toadlet. With this hypothesis in mind, we compared Cope’s characterization of B. diptychus with juveniles of all species of Rhinella present in the region, finding an exact match in almost all characters shown by the juveniles of the common “cururú” or “rococo” toad, Rhinella schneideri (Werner 1894). Henceforth, we postulate that R. schneideri is a junior synonym of B. diptychus, under the combination Rhinella diptycha (Cope 1862).

lavilla-biblio

The description of a new species of the Neotropical land crab genus Gecarcinus Leach, 1814 (Crustacea, Decapoda, Brachyura, Gecarcinidae).

Zookeys. 2014; (435): 93–109. Published online 2014 Aug 18. doi: 10.3897/zookeys.435.7271

Abstract:

In this contribution a new species of the land crab genus Gecarcinus Leach, 1814, from the Neotropical Pacific coast of South America is described and illustrated. In addition to its unique body color, Gecarcinus nobilii sp. n. is distinguished from congeners by a distinctly wider carapace front and differences in the shape of the infraorbital margin. The new species is not isolated from Gecarcinus populations from the Pacific coast of Central America by an insurmountable geographic barrier. Considering the closure of the Panamanian Isthmus as a calibration point for morphological divergence between the trans-isthmian mainland populations of Gecarcinus, the virtual lack of morphological differentiation (other than color) between them and the distinctness of G. nobilii sp. n. suggests that G. nobilii sp. n. evolved from a common ancestor before the Isthmus closed.

perger-biblio

Studies on neotropical Phasmatodea I: A remarkable new species of Peruphasma  Conle & Hennemann, 2002 from Northern Peru (Phasmatodea: Pseudophasmatidae: Pseudophasmatinae).

Zootaxa 1068: 59–68. ISSN: 1175-5334 (online edition)

Abstract:

Peruphasma schultei n. sp, a remarkable new phasmid from the Cordillera del Condor in Northern Peru is described and illustrated from both sexes and the eggs. It is the first species of Peruphasma Conle & Hennemann, 2002 known to have rudimentary tegmina and alae. The original specimens were  collected by Dipl. Biol. Rainer Schulte (INIBICO  NGO, Tarapoto, Peru) to whom it is dedicated. Brief information on its biology and breeding are provided as well. Peruphasma picturata  (Redtenbacher, 1906) is re-transferred to
Autolyca Stål, 1875 and the type-locality “Chile” is shown to be wrong.