Results 81 to 90 of about 2,449 (227)

Dietary resilience of coral reef fishes to habitat degradation

Journal of Animal Ecology, Volume 95, Issue 3, Page 397-417, March 2026.
Metabarcoding of gut contents shows that two common benthic‐feeding reef fishes with different feeding stratgies—a butterflyfish (Chaetodon capistratus) and a hamlet (Hypoplectrus puella)—shift diets on degraded reefs. These shifts mirror contrasting patterns in body condition: butterflyfish showed strong individual variation, whereas condition was ...
Friederike Clever, Richard F. Preziosi, Bryan Nguyen, Brígida De Gracia, Helio Quintero Arrieta, W. Owen McMillan, Andrew H. Altieri, Aaron O'Dea, Nancy Knowlton, Matthieu Leray   +9 more
wiley   +1 more source

First chromosomal analysis of Gymnorhamphichthys britskii: the remarkable lowest diploid value within the family Rhamphichthyidae (Gymnotiformes)

Neotropical Ichthyology
Gymnorhamphichthys britskii is a Neotropical electric fish of family Rhamphichthyidae described from the Paraná-Paraguay system. This study reports the first karyotypic description of G.
Carlos Alexandre Fernandes, Allan Kardec Moreira de Aguiar, Leonardo Marcel Paiz, Lucas Baumgärtner, Diovani Piscor, Vladimir Pavan Margarido   +5 more
doaj   +1 more source

Spatial and temporal variation of benthic fish assemblages during the extreme drought of 1997-98 (El Niño) in the middle rio Negro, Amazonia, Brazil

Neotropical Ichthyology
Spatial and temporal variation in the benthic fish composition, species richness, density and biomass were studied in the lower rio Branco and its confluence with the rio Negro during the 1997-98 dry season (September to February).
Mario J. F. Thomé-Souza, Ning Labbish Chao   +1 more
doaj   +1 more source

Fish fauna of headwater streams that cross the Atlantic Forest of south São Paulo state [PDF]

Check List, 2012
The fishes of the present study were collected in the headwater streams of the Sorocaba, Paranapanema and Ribeira de Iguape river basins during the dry period in 2010. A total of 2892 fishes, grouped in 53 species, were captured.
Mauricio Cetra, Walter Barrella, Francisco Neto, Abílio Martins, Bruno Mello, Rodrigo Almeida   +5 more
doaj   +3 more sources

A new species of the electric fish Microsternarchus Fernández-Yépez 1968 (Gymnotiformes: Hypopomidae) from the lower Amazon basin, Brazil.

Zootaxa
A new species of Microsternarchus is described from clear water streams in the lower Rio Amazonas basin, Brazil, increasing the known species in the genus to three.
Trycia Sousa, W. Wosiacki, J. Muriel-Cunha, B. Prudente, Rodrigo S. Sousa, L. Peixoto   +5 more
semanticscholar   +1 more source

Anthropogenic Factors Drive the Depletion of Fish Functional Β Diversity Within and Outside Two National Reserves in the Peruvian Amazon

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 12, December 2025.
ABSTRACT Understanding the impact of human activities on fish communities is critical for the effective conservation of Amazonian ecosystems. In this study, we sampled environmental DNA (eDNA) from 17 sites (lakes and rivers) in two Peruvian national reserves, Pacaya‐Samiria and Allpahuayo‐Mishana, using a metabarcoding approach with four genetic ...
B. Prat, C. Mariac, J.‐F. Renno, C. García‐Dávila, C. Angulo, G. Estivals, F. Duponchelle   +6 more
wiley   +1 more source

A new and improved electric fish finder with resources for printed circuit board fabrication [PDF]

Neotropical Ichthyology, 2019
We describe the circuit design, construction, and operation of a field-portable electric fish finder (an AC-coupled wide-band differential bio-amplifier with loudspeaker output).
Michael A. Haag, Jeffrey C. Lambert, Joseph C. Waddell, William G.R. Crampton   +3 more
doaj   +1 more source

Molecular phylogenetics and a new taxonomy of the neotropical electric fishes (Actinopterygii: Otophysi: Gymnotiformes).

Molecular Phylogenetics and Evolution
The order Gymnotiformes-Neotropical electric eels and knifefishes-comprise a distinctive lineage of freshwater fishes characterized by electrogenesis and electroreception.
Francesco H. Janzen, M. Sabaj, W. G. R. Crampton, N. Lovejoy   +3 more
semanticscholar   +1 more source

Submicrosecond pacemaker precision is behaviorally modulated: The gymnotiform electromotor pathway [PDF]

Proceedings of the National Academy of Sciences, 1998
What are the limits and modulators of neural precision? We address this question in the most regular biological oscillator known, the electric organ command nucleus in the brainstem of wave-type gymnotiform fish. These fish produce an oscillating electric field, the electric organ discharge (EOD), used in electrolocation and ...
K T, Moortgat, C H, Keller, T H, Bullock, T J, Sejnowski   +3 more
openaire   +2 more sources

Brain Transcriptomics Reveals Molecular Mechanisms of Cave Adaptation in Triplophysa Loaches

Ecology and Evolution, Volume 15, Issue 12, December 2025.
This study compares brain transcriptomes of cave (Triplophysa shilinensis) and surface‐dwelling (T. xiangshuingensis) loaches to uncover molecular adaptations to subterranean life. We identified widespread gene down‐regulation in the cave ecotype, with enriched pathways in energy metabolism, circadian rhythms, sensory perception, and body coloration ...
Chunqing Li, Longting Wu, Fang Hu, Shanyuan Chen, Heng Xiao   +4 more
wiley   +1 more source