Results 81 to 90 of about 5,643 (204)

A new species of Acestrocephalus (Characiformes: Characidae) from Venezuela.

Revista de biologia tropical, 2000
A new species of Acestrocephalus is described from 60 specimens collected in the Río Orinoco and Río Negro drainages, Venezuela. This species is distinguished. from aH other Acestrocephalus by the combination of the foHowing characters: anal rays, 29-36; 63-71 perforated scales on (he lateral line; 10-12 scales aboye and 9-12 below the lateral line; 39-
Lasso, Carlos A., Taphorn, Donald C.
openaire   +5 more sources

Una nueva especie de pez del género Hemibrycon (Characiformes: Characidae) [PDF]

, 2006
Una nueva espécie de pez del Género Hemibrycon (Characiformes: Characidae). Hemibrycon pautensis (Characiformes, Characidae), una nueva especie de peces de río Paute, se describe este de Ecuador.
Ruiz C., Raquel I., Barriga, Ramiro, Román-Valencia, César   +2 more
core  

Effects of Land Use and Environmental Characteristics on Condition Factor and Reproductive Aspects of Serrapinnus notomelas (Brazil)

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 8, August 2025.
ABSTRACT Changes in land use and land cover severely impact the ecological structure of aquatic ecosystems and can lead to losses in fish populations. To further examine the cause and effect, the present study aimed to evaluate (1) differences in land use and cover among subbasins of the Vacaria, Brilhante, Dourados and Lower Ivinhema Rivers, (2 ...
Bianca de Oliveira Souza, Lucilene Finoto Viana, Yzel Rondon Súarez, Sidnei Eduardo Lima‐Junior   +3 more
wiley   +1 more source

Gross anatomy and histology of the alimentary system of Characidae (Teleostei: Ostariophysi: Characiformes) and potential phylogenetic information

Neotropical Ichthyology
A compared study of the morphology of the alimentary tract and liver of seven selected species corresponding to the main clades of the Characidae family is presented herein.
Felipe Alonso, Juan Marcos Mirande, Matías Pandolfi   +2 more
doaj   +1 more source

Heterochromatin patterns and karyotype relationships within and between the genera Brycon and Salminus (Pisces, Characidae)

Genetics and Molecular Biology, 1999
Chromosomes of two Brycon species (B. lundii and B. microlepis) and Salminus hilarii were analyzed. Based on constitutive heterochromatin distribution patterns, karyotypic relationships within and between Bryconinae and Salmininae were examined.
Vladimir Pavan Margarido, Pedro Manoel Galetti Junior   +1 more
doaj   +1 more source

The elusive scleral cartilages: Comparative anatomy and development in teleosts and avians

The Anatomical Record, Volume 308, Issue 7, Page 1838-1850, July 2025.
Abstract The sclera of all vertebrate eyes is comprised of connective tissue, with some organisms developing cartilage within this tissue. A review of the cartilages that have been described in the vertebrate sclera and their anatomical relationships is discussed together with their potential homology.
Tamara A. Franz‐Odendaal
wiley   +1 more source

Inheritance of Trunk Banding in the Tetra (Gymnocorymbus ternetzi Characidae) [PDF]

Journal of Heredity, 2004
The tetra (Gymnocorymbus ternetzi) exhibits two phenotypes associated with trunk banding. Fish possess either a smoky-gray coloration with two prominent black vertical bands located directly behind the operculum (black tetra) or a lighter coloration and lack these bands (white skirt tetra).
openaire   +2 more sources

Fish distribution across altitudinal gradients in the Upper Paraguay River Basin: Implications for conservation in the Pantanal region

Conservation Science and Practice, Volume 7, Issue 7, July 2025.
This paper approaches the patterns in fish distribution across the altitudinal gradient in the Upper Paraguay River basin, from uplands to the floodplain. We compiled more than 75,000 available fish records and registered 342 fish species and your distribution along altitudinal gradient. Floodplain portion have higher species diversity than headwaters,
Adriana Maria Espinoza Fernando, Francisco Severo‐Neto, Fabiane Silva Ferreira, Lúcia Mateus, Karina K. Tondato‐Carvalho, Elaine Antoniassi Luiz Kashiwaqui, Heriberto Gimenes Junior, Wladimir M. Domingues, Carla Simone Pavanelli, Henrique Ledo Lopes Pinho, Jerry Penha, Yzel Rondon Súarez   +11 more
wiley   +1 more source

Hyphessobrycon ocasoensis sp. n. (Teleostei, Characidae) una nueva especie para el Alto Cauca, Colombia [PDF]

Animal Biodiversity and Conservation, 2008
Hyphessobrycon ocasoensis n. sp. (Teleostei, Characidae) a new species from the Alto Cauca, Colombia Hyphessobrycon ocasoensis n. sp. (Characiformes, Characidae) from heterorhabdus group (Gery, 1977) is described from the upper Cauca River in Colombia.
García-Alzate, C. A., Román-Valencia, C.   +1 more
doaj  

New host records and description of the egg of Anacanthorus penilabiatus (Monogenea, Dactylogyridae)

Memorias do Instituto Oswaldo Cruz, 2001
Anacanthorus penilabiatus is referred parasitizing the type-host Piaractus mesopotamicus (Serrasalmidae) and two new hosts, Colossoma macropomum and C.
MC Pamplona-Basilio, A Kohn, VA Feitosa
doaj   +1 more source