Results 31 to 40 of about 1,054 (146)

Disentangling Environmental, Spatial and Niche Influences on Fish Beta Diversity Along the Sandy Beaches of an Amazonian River

open access: yesFreshwater Biology, Volume 71, Issue 7, July 2026.
ABSTRACT Beta diversity is an important descriptor of community structuring and it plays a crucial role for understanding the patterns and processes shaping biodiversity at multiple spatial extents. We investigated the influence of local, spatial, landscape factors and niche characteristics on fish beta diversity along the Acre River in Acre, Brazil ...
Ronaldo S. Silva   +9 more
wiley   +1 more source

Influence of preservation methods, sample medium and sampling time on eDNA recovery in a neotropical river

open access: yesEnvironmental DNA, Volume 1, Issue 2, July 2019., 2019
Abstract Environmental DNA (eDNA) has rapidly emerged as a promising biodiversity monitoring technique, proving to be a sensitive and cost‐effective method for species detection. Despite the increasing popularity of eDNA, several questions regarding its limitations remain to be addressed.
Naiara G. Sales   +3 more
wiley   +1 more source

Relações filogenéticas entre os táxons basais da família Trichomycteridae (Siluriformes : Loricarioidea) [PDF]

open access: yes, 2004
The phylogenetic relationships of the family Trichomycteridae, according to the most recent topology, appears as a tritomy at the base of the cladogram, involving the subfamilies Copionodontinae, Trichogeninae and the remaining Trichomycteridae.
Lima, Sérgio Maia Queiroz
core  

Restoration Effects of the Riparian Forest on the Intertidal Fish Fauna in an Urban Area of the Amazon River

open access: yesThe Scientific World Journal, Volume 2016, Issue 1, 2016., 2016
Urbanization causes environmental impacts that threaten the health of aquatic communities and alter their recovery patterns. In this study, we evaluated the diversity of intertidal fish in six areas affected by urbanization (areas with native vegetation, deforested areas, and areas in process of restoration of vegetation) along an urban waterfront in ...
Júlio C. Sá-Oliveira   +8 more
wiley   +1 more source

Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes)

open access: yes, 2010
Spadella, M.A., Oliveira, C. and Quagio-Grassiotto, I. 2009. Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes).
Spadella, Maria Angelica   +4 more
core   +1 more source

Fish, upper Purus River, state of Acre, Brazil. [PDF]

open access: yesCheck List, 2008
The ichthyofauna of the headwaters of the main tributaries of the mighty Solimões/Amazonas River hasbeen little studied. Considering the importance of those environments for the overall fish diversity in that river system,we surveyed the composition of ...
Sousa, K. N. S.   +3 more
doaj   +4 more sources

Trichomycterus venulosus (Steindachner, 1915): posible extint species from the páramo de Cruz Verde (Cundinamarca, Colombia)

open access: yesBiota Colombiana, 2006
The investigation was carried out between November 2004 and August 2005, and was based on the rivers Teusaca, Idaza, La Laguna (Quebrada Blanca), del Salteador creek, Marlene creek (affluent of the del Salteador creek), Blanca creek (Mataredonda-Reserve)
Saúl Prada-Pedreros   +2 more
doaj   +8 more sources

Population dynamics of two Andean Trichomycterus (Siluriformes: Trichomycteridae) species from Bolivia [PDF]

open access: yesNeotropical Ichthyology
The species of Trichomycterus (Siluriformes: Trichomycteridae) are small catfish distributed throughout South and Central America, from Patagonia to Costa Rica, at elevations ranging from sea level to over 4,000 m.
Flavio Gallo-Cardozo   +5 more
doaj   +1 more source

FIGURE 1 in Trichomycterus santanderensis: A new species of troglomorphic catfish (Siluriformes, Trichomycteridae) from Colombia

open access: yes, 2007
FIGURE 1. Approximate location of Trichomycterus santanderensis, Cave El Puente, Upper Lebrija River basin of the Santander Department, northeast Colombia.Published as part of Castellanos-Morales, Cesar A., 2007, Trichomycterus santanderensis: A new ...
Castellanos-Morales, Cesar A. (5252002)   +1 more
core   +1 more source

Description of Silvinichthys pedernalensis n. sp. (Teleostei, Siluriformes) from the Andean Cordillera of southern South America [PDF]

open access: yesAnimal Biodiversity and Conservation, 2017
Silvinichthys pedernalensis, a new species, is described from an Andean stream in Provincia San Juan, Argentina, based on its coloration pattern, and its meristic, morphometric and osteological characters. S. pedernalensis differs markedly from all other
Fernández, L.   +2 more
doaj  

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