Results 71 to 80 of about 1,651,917 (208)

Phylogeny of the Electric Rays of the Family Narcinidae (Gill, 1862): Systematic Review and Evidence of the Dispersal Routes to America

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 6, June 2026.
ABSTRACT The family Narcinidae has a cosmopolitan distribution; however, its systematic composition and phylogenetic position within Torpediniformes remain poorly understood. This study evaluates the evolutionary and biogeographic history of the family Narcinidae and investigates its distribution patterns using molecular systematics.
Luis Fernando da Silva Rodrigues‐Filho, Richard Klein Castro Silva, Eduardo Lopes de Lima, Raquel Sicca‐Ramirez, Getúlio Rincon, Jorge Luiz Silva Nunes, Iracilda Sampaio, João Braullio de Luna Sales   +7 more
wiley   +1 more source

Tidal River Flood Risk Highest During Intermediate Rather Than Peak River Discharge

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract Tidal rivers are defined as the tide‐influenced, salinity‐free inland reaches of estuaries. Understanding the occurrence of peak water levels (PWLs) is critical for flood risk management, yet the timing and magnitude of PWLs in tidal rivers have been little studied. We address this gap by investigating PWLs during two catastrophic floods (1954
Leicheng Guo, Adam T. Devlin, Ton Hoitink, Ian Townend, David A. Jay, Zheng Bing Wang, Chunyan Zhu, Hamed R. Moftakhari, Qing He, Fan Xu, Yuanyang Wan, Yuan Xu, Weiming Xie   +12 more
wiley   +1 more source

Bryconamericus macarenae n. sp. (Characiformes, Characidae) from the Güejar River, Macarena mountain range, Colombia [PDF]

Animal Biodiversity and Conservation, 2010
Based on 174 specimens, using morphometric, meristic and osteological characters, we describe a new species: Bryconamericus macarenae from the Güejar River in La Macarena mountain range, Orinoco Basin, Colombia.
Román-Valencia, C., García-Alzate, C., Ruiz-C., R. I., Taphorn B., D. C.   +3 more
doaj  

Two new cis-Andean species of the South American catfish genus Megalonema allied to trans-Andean Megalonema xanthum, with description of a new subgenus (Siluriformes: Pimelodidae)

Neotropical Ichthyology
A revised diagnosis of the pimelodid catfish genus Megalonema is given based on synapomorphic features of the Weberian complex and gas bladder. Megalonema xanthum from the Magdalena River is redescribed.
John G. Lundberg, Wasila M. Dahdul
doaj   +1 more source

Use of high-intensity data to define large river management units: A case study on the lower Waikato River, New Zealand [PDF]

, 2014
The importance of environmental heterogeneity in lotic ecosystems is well recognised in river management, and continues to underpin studies of hierarchical patch dynamics, geomorphology and landscape ecology. We evaluated how physical characteristics and
Pingram, Michael Alister, Collier, Kevin J., David, Bruno O., Hicks, Brendan J., Hamilton, David P.   +4 more
core   +1 more source

Lista de los crustáceos decápodos de la cuenca del río Orinoco (Colombia-Venezuela)

Biota Colombiana, 2009
Based on Colombia and Venezuela's biological collections, and on a recent literature review, this is the first consolidated species list of decapod crustaceans for the Orinoco river basin.
Guido Pereira, Carlos A. Lasso, Julián Mora-Day, Célio Magalhães, Mónica A. Morales-Betancourt, Marta Campos   +5 more
doaj   +1 more source

The Delaware Toxics Reduction Program (DelTRiP)

, 2007
This pamphlet provides some introductory information about the Delaware Toxics Reduction Program (DelTRiP). DelTRiP is a multi-agency effort chaired by the DRBC to identify, track, prioritize, and report the status of contaminated sites that contribute ...

core   +1 more source

Lista de los mamíferos de la cuenca del río Orinoco

Biota Colombiana, 2009
A binational checklist of the mammal fauna from the Orinoco river basin is consolidated, reporting 318 species distributed across 12 orders, 40 families and 156 genera. This diversity represents the 76,8 % of the mammal species of Venezuela and the 68,7 %
Arnaldo Ferrer Pérez, Marisol Beltrán, Angélica Paola Díaz-Pulido, Fernando Trujillo, Hugo Mantilla-Meluk, Olga Herrera, Andrés Felipe Alfonso, Esteban Payán   +7 more
doaj   +1 more source

Clarifying nomenclatural uncertainties in Jupunba (Caesalpinioideae, Leguminosae)

Nordic Journal of Botany, Volume 2026, Issue 5, May 2026.
Molecular phylogenetic studies have prompted substantial revisions in the systematics of the former genus Abarema, resulting in the reinstatement of the genera Punjuba and Jupunba, and a re‐circumscription of Abarema. Despite these advances, some taxa still require nomenclatural adjustments to reflect monophyletic lineages.
Ethiéne Guerra, Marcos Vinicius Batista Soares, Marli Pires Morim, João Ricardo Vieira Iganci   +3 more
wiley   +1 more source

2008 Delaware River and Bay Integrated List Water Quality Assessment

, 2008
This report provides an assessment of waters in the Delaware River and Bay for support of various designated uses in accordance with Section 305(b) of the Clean Water Act and identifies impaired waters, which consist of waters that do not meet Delaware ...

core   +1 more source