Suchergebnisse

We report the results of a taxonomic revision of the species of Bryconamericus from the Amazon River Basin of Peru, Ecuador, Bolivia and the Pacific coastal rivers of Peru. Based on morphological analyses, four valid species are recognized: B. bolivianus Pearson 1924, B. osgoodi Eigenmann & Allen 1942, B. pachacuti Eigenmann 1927 and B. phoenicopterus (Cope 1872). Three new species are described: B. lambayequensis sp. n. from the Cañariaco River, Pacific coast, Peru and two from the Amazon River Basin: B. abalio sp. n. from the Ucayali River drainage, Peru, and B. parapetiensis sp. n. from Itenez/Parapeti, Amazonia, Bolivia. Two species are synonymized and one was recently assigned to another genus: Bryconamericus alfredae is considered a junior synonym of Acrobrycon ipanquianus; Bryconamericus grosvenori is a junior synonym of B. bolivianus. A taxonomic key to these species of Bryconamericus and comments on the conservation status of the Amazonian and Pacific coast freshwater ichthyofauna are also included.

In this study we analyze the bases of environment and climate change management for 12 counties of Quindío department, Colombia. A documentary review, analysis of data and observations obtained on environmental management in the context of climate change and analysis in territorial planning and development plans of two administrative periods (2012-2015 and 2016-2019). It was found that the models and guidelines for progress on these issues have not been effectively implemented by some administrations or the inclusion of the environmental and climate change incomplete, in the territorial ordering of the respective counties administrations, in the sense of establishing effective environmental protection and prevention measures. This is due to the prevailing economic model and/or in cases, for example, to the conflicts of interest of the people who carry out and project the tools in the context of sustainable planning and development. Therefore, confronting existing environmental management challenges in light of the requirements of climate change at the state level requires an understanding of the complex dimensions of the territory in coordination with the identity of communities in that territory, instead of imposing and imported development model. ; En este trabajo se analizan las bases de la gestión ambiental frente al cambio climático en los 12 municipios del departamento de Quindío, Colombia. Se efectúo una revisión documental y análisis de datos y observaciones obtenidos sobre la gestión ambiental en el marco de cambio y análisis climático en la planificación territorial y planes de desarrollo sobre dos vigencias administrativas (2012–2015 y 2016-2019). Se encontró que las directrices para el progreso no han sido implementadas efectivamente en algunas administraciones o es incompleta la inclusión del tema ambiental y climático, en el ordenamiento territorial de las respectivas administraciones municipales, en el sentido de establecer medidas de protección y prevención ambiental efectivas. Lo anterior se debe al modelo económico imperante y/o en casos, por ejemplo, a los conflictos de interés de las personas que realizan y proyectan las herramientas en el contexto de la planificación y desarrollo sustentable. Por tanto, enfrentar desafíos de gestión ambiental a la luz de los requisitos del cambio climático a nivel de los gobiernos locales requiere una comprensión de las complejas dimensiones del territorio y la coordinación con la identidad del mismo, más allá de un modelo desarrollo impuesto.

Hemibrycon guejarensis, new species, is described from the Güejar River, La Macarena mountain range, upper Guaviare River drainage, Colombia. The new species is distinguished from most cis-Andean congeners (H. jabonero Lake Maracaibo and adjacent Caribbean drainages, H. metae which is found in the Guavio River, some Orinoco and Caribbean River drainages in Venezuela, and H. taeniurus from Trinidad and adjacent mainland drainages in Venezuela) in having ii, 7, i dorsal-fin rays (vs. ii, 8). H. guejarensis is further distinguished from H. taeniurus and H. jabonero, in having a wider second pigment layer in the humeral spot (covering 3 vs. 2 scale widths). H. guejarensis is very similar to H. metae (an allopatric species also present in streams of the Orinoco River Basin in Venezuela and Colombia and some Venezuelan Caribbean drainages). Hemibrycon guejarensis is distinguishedby the orientation of the dorsal lateral-line canal which crosses the ventral part of the humeral spot transversely vs. horizontally across dorsal part of spot in the holotype of H. metae and Orinoco and Caribbean populations. H. guejarensis differs from H. metae in having the tip of the pectoral fin passing the pelvic-fin insertions (vs. pectoral fin tip not reaching pelvic-fin insertions). We identify populations previously considered as Hemibrycon metae from Venezuelan Orinoco River Basin piedmont streams and Caribbean drainages to be instead H. jabonero and H. taeniurus. Careful analysis of these populations indicated that all of them differ from the H. metae holotype and topotypic specimens in pelvic fin and postorbital lengths.

Based on 69 specimens, using morphometric, meristic and osteological characters, we describe a new species of Hemibrycon from the Rancheria River, a Caribbean coastal drainage of eastern Colombia that drains the Sierra Nevada de Santa Marta. H. santamartae is distinguished from congeners by the following: presence of small hooks on the first six to eight branched analfin rays of males, with two to four hooks on only the middle sections of the rays; adipose fin pigmented but with hyaline margins; an apophysis present on the dorsal margin of the rhinosphenoids that is directed toward the anterior tip; ventral process of the angulo-articular reduced and with a straight margin. Data on the phylogenetic position of the new species are presented.