Results 71 to 80 of about 1,505 (203)

River Geomorphology and Fish Diversity Around the Manseriche Gorge, the Last Andean Crossing Is in Peril

Water Resources Research, Volume 60, Issue 11, November 2024.
Abstract The transition from the Andes to the Amazon lowland hosts a high biodiversity and currently is facing several anthropogenic activities, including hydropower infrastructure projects. Little is known about the geomorphology of the Andean gorges, rivers and the interaction with the fish diversity upstream and downstream of gorges.
J. D. Abad, H. Chicchon, J. Chuctaya, A. Mendoza, H. Valverde, C. Oshiro, M. Montoya   +6 more
wiley   +1 more source

The stream fish fauna from the rio Machado basin, Rondônia State, Brazil [PDF]

Check List, 2013
The rio Machado (also known as Ji-Paraná) is a tributary of the rio Madeira in the Amazon basin. Currently, the rio Madeira contains the greatest fish species richness of the world, with approximately 1,000 species.
Lilian Casatti, María Pérez-Mayorga, Fernando Carvalho, Gabriel Brejão, Igor da Costa   +4 more
doaj   +3 more sources

Assessing fish diversity in abandoned mining ponds in Madre de Dios, Peru, using environmental DNA

Environmental DNA, Volume 6, Issue 1, January–February 2024.
We surveyed four lentic systems in Madre de Dios, Peru: two abandoned mining ponds created by ASGM and two unmined oxbow lakes as a reference to assess fish recolonization. We compared two alternative eDNA processing methods and contrasted our results with historic data from traditional biodiversity monitoring. Our results indicate that eDNA could be a
Camila Timana‐Mendoza, Alonso Reyes‐Calderon, Patrick Venail, Julio M. Araújo‐Flores, Mónica C. Santa‐Maria   +4 more
wiley   +1 more source

Diversidad y relaciones ecomorfol?gicas de la comunidad ?ctica del complejo de humedales de paz de ariporo hato corozal, Casanare [PDF]

, 2018
122 p. Recurso Electr?nicoLas sabanas inundables de la cuenca del r?o Orinoco se caracterizan por tener una alta diversidad ecosist?mica, heterogeneidad estructural y funcional, contribuyendo a la conformaci?n de diferentes tipos humedales tanto l ...
Bedoya Giraldo, Daniela, Ospina Ospina, Juan Sebasti?n   +1 more
core  

Fresh vs. Preserved Specimens: Length‐Weight Relationships of Fishes from the Western Amazon (Napo Basin, Ecuador)

Journal of Applied Ichthyology, Volume 2024, Issue 1, 2024.
Length‐weight relationship (LWR) studies are important for fish taxonomical analysis, ecological assessments, management, and conservation practices. Although LWR studies can use measurements of either fresh or preserved specimens, few studies have directly compared these methods. This study analyzed the effect of preservation on LWR of ten small‐sized
Karla S. Barragán, Junior Chuctaya, Daniel Escobar-Camacho, José Vieira, Andrea C. Encalada, Pragyan Dash   +5 more
wiley   +1 more source

New species of Moenkhausia Eigenmann, 1903 (Characiformes: Characidae) with comments on the Moenkhausia oligolepis species complex

Neotropical Ichthyology
A new species of Moenkhausia is described from tributaries of the rio Paraguay, Brazil. The new species is diagnosed from congeners by characters related to body coloration, the number of lateral line scales, the degree of poring of the lateral line, and
Ricardo C. Benine, Tatiane C. Mariguela, Claudio Oliveira   +2 more
doaj   +1 more source

Exchange flow between open water and floating vegetation [PDF]

, 2010
This study describes the exchange flow between a region with open water and a region with a partial-depth porous obstruction, which represents the thermally-driven exchange that occurs between open water and floating vegetation.
A Lightbody, A Padial, C Adams, C Lovstedt, D Barr, D Plew, E Adams, FM White, G Jirka, G Ultsch, Heidi M. Nepf, J Shin, JE Simpson, M Coates, M Coates, M Mariana, N Azza, R Hill, T Benjamin, X Zhang, X Zhang, Xueyan Zhang, Y Mazda, Y Tanino, Y Tanino   +24 more
core   +1 more source

Redescription of Moenkhausia doceana(Steindachner, 1877) (Ostariophysi: Characiformes): a characid from the Northeastern Mata Atlântica ecoregion, Brazil

Neotropical Ichthyology
Moenkhausia doceana is redescribed from the Northeastern Mata Atlântica ecoregion drainages in Espírito Santo, Minas Gerais, and Bahia states. The species is distinguished from its congeners by a long anal fin, with 29-34 (mode 32) branched rays; 4-7 ...
Fernando R. Carvalho, Luisa M. Sarmento-Soares, Ronaldo F. Martins-Pinheiro   +2 more
doaj   +1 more source

Ichthyofauna (Osteichthyes, Actinopterygii) from tributaries of the Beni and Mamoré rivers in the Llanos de Moxos wetland of the Bolivian Amazon [PDF]

Check List
We conducted ichthyological surveys in the Biata, Geneshuaya, Benicito, and Yata Rivers, as well as Dos Naciones Lagoon. We recorded 182 species, including new records for Bolivia, such as Jupiaba citrina Zanata & Ohara, 2009, Moenkhausia ...
Takayuki Yunoki, Aldo R. Echeverria, Reinaldo B. Cholima, Guido Miranda Ch., Federico A. Moreno   +4 more
doaj   +3 more sources

Stability and spatio-temporal structure in fish assemblages of two floodplain lagoons of the lower Orinoco River

Neotropical Ichthyology
Fish assemblage structure and variability were analyzed in two floodplain lagoons (Las Arhuacas and Los Cardonales) along the lower Orinoco over a hydrological cycle.
Nirson González, Carlos Lasso, Judith Rosales   +2 more
doaj   +1 more source