313 research outputs found
Attractiveness and distinctiveness between speakers' voices in naturalistic speech and their faces are uncorrelated
honest signal hypothesis, attractiveness, averageness, face, distinctiveness, voic
El cariotipo de Amphisbaena munoai y comentarios sobre la meiosis en los Amphisbaenidae
El cariotipo de Amphisbaena munoai es descripto en base a cuatro ejemplares provenientes de la localidad típica, Cerro de las Ánimas, en el departamento de Maldonado, Uruguay. Los cuatro individuos, dos machos (GSKR-118 y 135), y dos hembras (GSKR-116 y 117), fueron ingresados provisoriamente en la colección de campo del autor.Asociación Herpetológica Argentin
El cariotipo de Amphisbaena munoai y comentarios sobre la meiosis en los Amphisbaenidae
El cariotipo de Amphisbaena munoai es descripto en base a cuatro ejemplares provenientes de la localidad típica, Cerro de las Ánimas, en el departamento de Maldonado, Uruguay. Los cuatro individuos, dos machos (GSKR-118 y 135), y dos hembras (GSKR-116 y 117), fueron ingresados provisoriamente en la colección de campo del autor.Asociación Herpetológica Argentin
The problem of wastewater treatment in the Karst region
The thesis addresses the issue of the treatment of urban waste water in three municipalities of the Karst region. The first part of the thesis comprises a general review of the legislation covering the discharge, emission and treatment of waste water both at the European and Slovene level and a description of the existing urban and industrial waste water treatment plants in the Karst area.\ud
With regards to Rules on the collection and treatment of urban waste water and meteoric water the thesis analyzes the actual burden caused by waste water in settlements with a population equivalent of more than 50. Various potential solutions are given, the most favourable of which is detailed in the final part of the thesis together with the capacity and the number of small urban waste water treatment plants that should be built
Description of the Tadpole of Proceratophrys renalis (Miranda-Ribeiro, 1920) (Anura: Cycloramphidae)
The tadpole of Proceratophrys renalis is described based on specimens from Maceió, State of Alagoas, northeastern Brazil. At stage 35 the body is slightly dorso-ventrally depressed, ovoid in lateral, dorsal, and ventral views. Oral disc is ventral with lateral emarginations, surrounded by a single row of marginal papillae with a large gap on the upper labium. Labial tooth row formula is 2(2)/3(1). The analysis of internal oral anatomy revealed two possible characters that readily distinguish P. renalis from P. boiei, supporting the recent ressurection of P. renalis. Comparisons with available descriptions of the larvae for other species in the genus are provided
Description of the Tadpole of \u3cem\u3eProceratophrys renalis\u3c/em\u3e (Miranda-Ribeiro, 1920) (Anura: Cycloramphidae)
The tadpole of Proceratophrys renalis is described based on specimens from Maceió, State of Alagoas, northeastern Brazil. At stage 35 the body is slightly dorso-ventrally depressed, ovoid in lateral, dorsal, and ventral views. Oral disc is ventral with lateral emarginations, surrounded by a single row of marginal papillae with a large gap on the upper labium. Labial tooth row formula is 2(2)/3(1 ). The analysis of internal oral anatomy revealed two possible characters that readily distinguish P. renalis from P. boiei, supporting the recent resurrection of P. renal is. Comparisons with available descriptions of the larvae for other species in the genus are provided
Hábitos alimenticios de la rana bromélicola Phyllodytes edelmoi Peixoto, Caramaschi & Freire, 2003 (Anura: Hylidae) del Estado de Alagoas, Noreste de Brasil
El género de hílidos Phyllodytes está compuesto por 12 especies distribuidas en el este de Brasil y conocidas por habitar estrictamente bromeliáceas. En este estudio se exploran los hábitos alimenticios de P. edelmoi y se testea la selectividad de las presas por la especie comparando las presas encontradas en los estómagos con la disponibilidad de presas en las bromelias. Nuestros resultados muestran que P. edelmoi consume grandes cantidades de hormigas a lo largo del año, por lo que podría considerarse una especie "especializada en hormigas". Este comportamiento alimenticio especializado podría ser considerado una sinapomorfia para el género Phyllodytes.The hylid frog genus Phyllodytes comprised 12 species distributed in eastern Brazil and knownto strictly inhabit inside bromeliads. In this study, we explore the feeding habits of P. edelmoiand test the prey selectivity of the species by comparing the prey items in the stomachs contentswith the availability of preys in bromeliads. Our results show that P. edelmoi consumes highamounts of ants along the year, and therefore it could be considered an ?ant specialist? species.This specialist feeding behaviour could be considered a synapomorphy of the genus Phyllodytes.Fil: Araujo-Vieira, Katyuscia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Ubiratan G. Silva. Universidade Federal de Alagoas; BrasilFil: Jhonatan Guedes dos Santos. Universidade Federal de Alagoas; BrasilFil: Thame G. Ferreira. Departamento de Ecologia E Biomonitoramento; BrasilFil: Gabriel O. Skuk. Universidade Federal de Alagoas; Brasi
Karyotypes of Eight Species of \u3cem\u3eLeptodactylus\u3c/em\u3e (Anura, Leptodactylidae) with a Description of a New Karyotype for the Genus
Karyotypes of eight species of Leptodactylus (Anura, Leptodactylidae) with a description of a new karyotype for the genus. Eight species of the Neotropical genus Leptodactylus were karyologically studied: seven of them (L. gracilis, L. mystacinus, L. petersii, L. pustulatus, L. macrosternum, L. ocellatus, L. labyrinthicus) presented 2n=22 and L. silvanimbus showed a distinctive karyotype with 2n=24. Nucleolar organizer regions (Ag-NORs) were detected in two different pairs of chromosomes: pair 4 at the proximal region of the long arm of one individual of L. mystacinus from São Paulo state and of L. petersii; and pair 8 of all other species (located terminally at the short arm of L. silvanimbus, L. ocellatus, L. macrosternum, L. pustulatus, and L. labyrinthicus; interstitially at the short arm in L. gracilis; and at the long arm in L. mystacinus from Mato Grosso state). The diploid number reported here for L. silvanimbus shared with Scythrophrys and Paratelmatobius could represent the ancestral chromosome number for Leptodactylus (sensu Frost et al. 2006); in this case the 2n=22 karyotypes would then represent the derivative condition for the genus. Nevertheless, the distinctive karyotype of L. silvanimbus lead us to preclude a final decision on its relationships. Additional studies including morphological and molecular approaches are needed in order to clarify the phylogenetic position of L. silvanimbus
Karyotypes of eight species of Leptodactylus (Anura, Leptodactylidae) with a description of a new karyotype for the genus
Eight species of the Neotropical genus Leptodactylus were karyologically studied: seven of them (L. gracilis, L. mystacinus, L. petersii, L. pustulatus, L. macrosternum, L. ocellatus, L. labyrinthicus) presented 2n=22 and L. silvanimbus showed a distinctive karyotype with 2n=24. Nucleolar organizer regions (Ag-NORs) were detected in two different pairs of chromosomes: pair 4 at the proximal region of the long arm of one individual of L. mystacinus from São Paulo state and of L. petersii; and pair 8 of all other species (located terminally at the short arm of L. silvanimbus, L. ocellatus, L. macrosternum, L. pustulatus, and L. labyrinthicus; interstitially at the short arm in L. gracilis; and at the long arm in L. mystacinus from Mato Grosso state). The diploid number reported here for L. silvanimbus shared with Scythrophrys and Paratelmatobius could represent the ancestral chromosome number for Leptodactylus (sensu Frost et al. 2006); in this case the 2n=22 karyotypes would then represent the derivative condition for the genus. Nevertheless, the distinctive karyotype of L. silvanimbus lead us to preclude a final decision on its relationships. Additional studies including morphological and molecular approaches are needed in order to clarify the phylogenetic position of L. silvanimbus
The tadpole of Hypsiboas atlanticus (Anura, Hylidae) from northeastern Brazil
The tadpole of Hypsiboas atlanticus (Caramaschi & Velosa, 1996) is described from the municipality of Maceió, State of Alagoas, Brazil. At stage 36 the larvae have an overall elliptical body in lateral and dorsal views, oral disc anteroventral, spiracular tube sinistral, and labial tooth row formula 2(1,2)/3(1). The oral disc is surrounded, almost completely (anterior medial gap present) by a single row of marginal papillae. Described tadpoles of the H. punctatus species group can be differentiated by a combined disc oral features. Additional descriptions of H. punctatus (Schneider, 1799) tadpoles from populations throughout South America may be helpful in determining the status of these populations
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