Results 51 to 60 of about 19,555 (242)

Spinal malformations in a naturally isolated Neotropical fish population

PeerJ, 2021
Fish populations that reside in completely isolated freshwater ecosystems are rare worldwide. The Vila Velha State Park (VVSP), located in southern Brazil, is recognized for its arenitic formations called sinkholes (furnas), which are completely isolated. Fish populations within, such as those of Psalidodon aff.
Franciele Fernanda Kerniske, Jonathan Pena Castro, Luz Elena De la Ossa-Guerra, Bruna Angelina Mayer, Vinícius Abilhoa, Igor de Paiva Affonso, Roberto Ferreira Artoni   +6 more
openaire   +3 more sources

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

The Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri, Humberto L. Andrelino, Sergio Bogan, José P. O'Gorman, Federico Agnolín, Brian L. Sidlauskas, Nahuel Vega, Agustín G. Martinelli, José L. Birindelli   +8 more
wiley   +1 more source

New characid fish, Hyphessobrycon scutulatus, from the rio Teles Pires drainage, upper rio Tapajós system (Ostariophysi: Characiformes: Characidae)

Neotropical Ichthyology
A new species of characid fish, Hyphessobrycon scutulatus, is described from the rio Teles Pires drainage, upper rio Tapajós system. The new species is distinct from all Hyphessobrycon species by the following characters: inner row premaxillary teeth 7 ...
Carlos Alberto Santos de Lucena
doaj   +1 more source

Long‐term trends in parasite diversity and infection levels: approaches and patterns

Biological Reviews, EarlyView.
ABSTRACT Parasites exist in every ecosystem, affecting nearly all organisms and playing a complex role in human societies. On the one hand, they contribute substantially to biodiversity and support ecosystem stability by performing essential ecological functions.
Cyril Hammoud, Juan Antonio Balbuena, Isabel Blasco‐Costa, Katie O'Dwyer, Rachel A. Paterson, Tomáš Scholz, Christian Selbach, Bernd Sures, David W. Thieltges   +8 more
wiley   +1 more source

Design and construction of an Electric Fish Finder

Neotropical Ichthyology
We provide notes on the design and construction of an Electric Fish Finder - a portable differential amplifier for detecting the electrostatic fields of gymnotiform knifefishes.
William G. R. Crampton, Jonathan K. Wells, Charles Smyth, Steven A. Walz   +3 more
doaj   +1 more source

Ichthyological ecoregions of Argentina [PDF]

, 2002
The Argentine Republic is situated in the southernmost portion of the American continent, occupying over 2,785,600 km2 not including the Antarctic territory. The country ranges from subtropical areas (21º46’S) to subantarctic regions (55º03’S), extending
López, Hugo Luis, Montenegro, Marcelo J., Morgan, Cecilia C.   +2 more
core  

Mitochondrial DNA phylogeny of the family cichlidae: monophyly and fast molecular evolution of the neotropical assemblage [PDF]

, 1999
. A mitochondrial DNA (mtDNA) phylogeny of cichlid fish is presented for the most taxonomically inclusive data set compiled to date (64 taxa). 16S rDNA data establish with confidence relationships among major lineages of cichlids, with a general pattern ...
Amazonas Brasil, Axel Meyer, Guillermo Ortí, Horacio Schneider, Iracilda Sampaio, Izeni P. Farias   +5 more
core   +2 more sources

How wildlife respond to tropical cyclones: short‐term tactics and long‐term impacts

Biological Reviews, EarlyView.
ABSTRACT From butterflies to lizards and from sharks to seabirds, wildlife exhibit tactics to survive the impacts of tropical cyclones, also known as hurricanes, cyclones, or typhoons depending on where they occur. Some species seek refuge during the storm by moving, some remain in place and ride it out, and others move longer distances, avoiding the ...
Erin L. Koen, Mohamed Khalil Meliane, Zachery B. Holmes, Karl E. Miller, William J. Barichivich, Emilie Dedeban, Alex Furst, Miranda Imeri, Peyton E. Niebanck, Samantha Nunn, Kailee Pearson, Nicole Rita, Brier Ryver, Dakotah Shaffer, Susan C. Walls, E. Hance Ellington   +15 more
wiley   +1 more source

Phylogenetic analysis of microbial communities in different regions of the gastrointestinal tract in Panaque nigrolineatus, a wood-eating fish [PDF]

, 2012
The Neotropical detritivorous catfish Panaque nigrolineatus imbibes large quantities of wood as part of its diet. Due to the interest in cellulose, hemi-cellulose and lignin degradation pathways, this organism provides an interesting model system for the
McDonald, R., Schreier, H., Watts, Joy
core   +3 more sources

Signatures of convergence in Neotropical cichlid fish

Molecular Ecology
AbstractConvergent evolution of similar phenotypes suggests some predictability in the evolutionary trajectories of organisms, due to strong and repeated selective pressures, and/or developmental constraints. In adaptive radiations, particularly in cichlid fish radiations, convergent phenotypes are commonly found within and across geographical settings.
Mariana Leal‐Cardín, Seraina E. Bracamonte, Javier Aldegunde, Isabel S. Magalhaes, Claudia Patricia Ornelas‐García, Marta Barluenga   +5 more
openaire   +3 more sources