Results 31 to 40 of about 14,323 (223)

Ossification of the cranium of Inpaichthys kerri (Characiformes: Acestrorhamphidae) with discussion of paedomorphic traits in the genus

open access: yesJournal of Anatomy, EarlyView.
In this study, we present a detailed description of the cranial development of Inpaichthys kerri (Characiformes: Acestrorhamphidae), highlighting important topics such as pedomorphic characters and their relationship with ontogeny and phylogeny, as well as ossification sequences unique to the species. Abstract The study of development provides valuable
Yasmim De Santana Santos   +1 more
wiley   +1 more source

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

open access: yesJournal 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

Ictiofauna do Rio Jurubatuba, Santos, São Paulo: um refúgio de diversidade em terras impactadas [PDF]

open access: yes, 2010
Ichthyofaunistic surveys in the Atlantic Rainforest have been published in relatively few works, in spite of the major biological importance of this once vast biome which is rapidly vanishing due to disordered human population growth and natural ...
IGLESIAS, José Manoel Pires   +1 more
core   +1 more source

Local Environmental Variables Predict Fish Species Richness and Composition in Sand Beaches of a Neotropical River

open access: yesRiver Research and Applications, Volume 41, Issue 9, Page 1949-1958, November 2025.
ABSTRACT Local and regional species diversity is influenced by historical factors, resource availability, biotic interactions, the presence of resources, and adequate environmental conditions. We evaluated the effects of local environmental variables and spatial structure on fish species richness and composition along sandy beaches of a Neotropical ...
Ronaldo Souza da Silva   +8 more
wiley   +1 more source

Parasites and non-fish predators of tilapia with particular reference to the sustainable management of fisheries of Lake Kainji Nigeria [PDF]

open access: yes, 2001
The fisheries of Lake Kainji, Nigeria, experienced a boom year following impoundment, then decline post impoundment and now is in a period of stabilisation of the fish resources. Several reasons have been advanced on factors responsible for these changes,
Obiekezie, A.   +2 more
core  

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

open access: yesAquatic 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   +3 more
wiley   +1 more source

Redescription of Astyanax erythropterus (Holmberg, 1891) (Teleostei: Characiformes: Characidae) from La Plata basin in Argentina [PDF]

open access: yes, 2010
Astyanax erythropterus (Holmberg, 1891) originally described on the basis of one juvenile, is redescribed herein based on juveniles and adults from the type-localiy.
Almirón, Adriana E.   +4 more
core   +3 more sources

Fish fauna from Río Pilcomayo National Park and Ramsar Site and its surroundings, Formosa, Argentina [PDF]

open access: yes, 2014
The first list of fish species from the Río Pilcomayo National Park and Ramsar Site (RPNP), located in the WetChaco plains of Northern Argentina is presented here.
Baigún, Claudio Rafael M.   +5 more
core   +4 more sources

Karyotypic diversity in a population of Bryconamericus aff. iheringii (Characidae)

open access: yesGenetics and Molecular Research, 2014
Bryconamericus comprises 56 species distributed into three groups, on the basis of the position and shape of the maxillary teeth: B. exodon, B. microcephalus and B. iheringii groups. Few cytogenetic data are available for this genus, but the diploid number of 52 chromosomes is quite common, although the karyotypic variability is extensive.
L L L, da Silva   +2 more
openaire   +2 more sources

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