Results 21 to 30 of about 2,957 (131)
Automatic identification of species with neural networks [PDF]
PeerJ, 2014 A new automatic identification system using photographic images has been designed to recognize fish, plant, and butterfly species from Europe and South America. The automatic classification system integrates multiple image processing tools to extract the
Andrés Hernández-Serna +1 more
doaj +2 more sources
Long‐Term Changes in Planktonic Ciliate Beta Diversity Under Contrasting Hydrological Regulation in A River–Floodplain System [PDF]
Environ MicrobiolHydrological regulation by dams reshaped ciliate biodiversity over 14 years, increasing temporal compositional change and ecological uniqueness while accelerating declines in richness and density. These results highlight flood‐pulse dynamics as a fundamental mechanism sustaining biodiversity and ecological integrity in river‐floodplain ecosystems ...
de Souza Y +7 more
europepmc +2 more sources
Biota Colombiana, 2017 La fecundidad relativa en peces es la estimación de la cantidad de ovocitos de una hembra por desove. Este aspecto se investigó en especímenes topotipos de Grundulus quitoensis de la laguna altoandina El Voladero, Ecuador.
Jonathan Valdiviezo-Rivera +3 more
doaj +5 more sources
Effects of Glyphosate on the Planktonic Microbiota: An Experimental Approach. [PDF]
Environ ToxicolABSTRACT Glyphosate is one of the most widely used herbicides in the world, including in Brazil, and its dispersion through habitats and surface waters can impact entire aquatic ecosystems. However, experimental studies evaluating the effects of pesticides on whole planktonic communities, considering attributes such as richness, density and composition—
Progênio M +7 more
europepmc +2 more sources
La pesca comercial y el estudio de la fauna marina en la Argentina, 1890-1930
História, Ciências, Saúde: Manguinhos, 2014 Este trabajo examina la relación entre el desarrollo de la pesca comercial marítima y el estudio de la fauna marina en la Argentina de fines del siglo XIX y las primeras décadas del siglo XX.
Susana V. Garcia
doaj +1 more source
Revista Peruana de Biología, 2017 Thorichthys panchovillai, new species, is described, from distinctive of the tributaries of the River Coatzacoalcos basin, Mexico. The new species is diagnosed by a set of characters: dorsal fin rays XVI, 8 – 9; anal fin rays VII, 6 – 7; pectoral fin ...
Luis Fernando Del Moral-Flores +2 more
doaj +1 more source
Hybridization, Maternal Inheritance, and Evolutionary Time of Divergence of Endangered Species of <i>Hypancistrus</i> (Siluriformes: Loricariidae) in the Xingu River. [PDF]
Ecol EvolWe uncover recent hybridization dynamics among three endemic Hypancistrus species from the Xingu River, including the critically endangered H. zebra. Mitogenomic analyses reveal unidirectional maternal inheritance and recent evolutionary radiation (< 0.5 Ma), explaining their retained reproductive compatibility.
Kerniske FF +4 more
europepmc +2 more sources
Global Ecology and Conservation, 2023 The peace process in Colombia allowed biodiversity experts to visit unexplored regions in the tropical Andes mountains. The diversity of fish species and characteristics of the aquatic environments (creeks, streams, and river channels) in which they live
Daniel Restrepo-Santamaria +5 more
doaj +1 more source
Estudio preliminar de ictioplancton de la Amazonia peruana con énfasis en la familia Pimelodidae
Revista Peruana de Biología, 2013 En el presente trabajo se informa y describen las larvas de peces presentes en la naciente del río Madre de Dios, con énfasis en la familia Pimelodidae. Las colectas se realizaron entre noviembre y diciembre de 2004, utilizando una red de ictioplancton
María Rojas +3 more
doaj +1 more source
Acta Zoológica Lilloana, 2023 El gobio Shimofuri (Tridentiger bifasciatus) es originario de la costa noroeste del Pacífico de Asia. Este pez fue registrado como especie exótica en 1985 en California, EE.
Sergio Bogan
doaj +1 more source