Results 71 to 80 of about 15,184 (259)

Joint effects of elevated copper and temperature in juvenile Tambaqui exposed in black and white waters of the Amazon

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study aimed to investigate how exposure to elevated water temperature and metal concentration jointly affect the physiology of Amazonian fish. Aboard a research vessel in the Amazon, we evaluated the effects of water temperature (river T°C at 31.5°C and a + 4°C increase to 35.5°C) and of 3‐h copper (Cu) exposure (up to 600 μg/L) in ...
Anne Crémazy   +6 more
wiley   +1 more source

Fish, Ribeirão do Feijão Basin, São Carlos, São Paulo, Brazil [PDF]

open access: yesCheck List, 2008
The Ribeirão do Feijão Basin is the main water supplier for the municipality of São Carlos, in the state of São Paulo, Brazil. Field work was carried out from February to November 2005, using sieves, casting nets, and drag nets.
Oscar Shibatta, Ângela Silva-Souza
doaj   +5 more sources

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

Comparative Mitochondrial Features Across Characiformes (Teleostei: Ostariophysi) and Mitogenomic Architecture of Nematobrycon lacortei

open access: yesDiversity
Characiformes, a highly diverse group, are of great economic and ecological significance; however, their complex morphological convergence and adaptive radiation pose challenges to taxonomy, and phylogenetic controversies remain.
Hongjian Chen   +3 more
doaj   +1 more source

Ecological Niche Modeling of Hoplias malabaricus (Characiformes, Erythrinidae) Under Climate Change Scenarios

open access: yesEcology and Evolution, Volume 15, Issue 11, November 2025.
This study employs ecological niche models (ENMs) to project current and future habitat suitability for a genetically validated lineage of Hoplias malabaricus, a widely distributed Neotropical freshwater predator. ABSTRACT Freshwater fish are highly vulnerable to climate change because they are restricted to inland waters and cannot readily disperse ...
Karen L. Auzier Guimarães   +2 more
wiley   +1 more source

Fish, Taquara river basin, northern of the state of Paraná, Brazil. [PDF]

open access: yesCheck List, 2007
Taquara River is situated in an agriculturist region, on the northern portion of the Tibagi river basin, state ofParaná. Fish fauna was collected in five stretches of the Taquara River and in nine headwaters of its tributaries, in theperiod of May to ...
Galves, W.   +2 more
doaj   +4 more sources

Dos especies nuevas de Creptotrema (Digenea: Allocreadiidae) de America del Sur

open access: yesRevista Mexicana de Biodiversidad, 2008
DOS ESPECIES NUEVAS DE DIGÉNEOS PERTENECIENTES A CREPTOTREMA TRAVASSOS, ARTIGAS Y PEREIRA, 1928 FUERON DESCRITAS DE EJEMPLARES DEPOSITADOS EN LA COLECCIÓN DE INVERTEBRADOS DEL MUSEO DE HISTORIA NATURAL DE GINEBRA, SUIZA. CREPTOTREMA LAMOTHEI N. SP.
STEPHEN S. CURRAN
doaj   +1 more source

On some species of Astyanax reported erroneously from Argentina [PDF]

open access: yes, 2015
Several species of Astyanax have been reported from Argentina which currently are considered not to be distributed so far South or whose identity as Astyanax is doubtful.
Koerber, Stefan, Mirande, Juan Marcos
core  

The efficiency of spermatogenesis and the support capacity of Sertoli cells in Characiformes [PDF]

open access: yesTheriogenology, 2017
This stereological analysis of the types of germ cells and the number of Sertoli cells per cyst in Astyanax altiparanae testes during spermatogenesis is the first such report in Characiformes. Testes of 25 male A. altiparanae were examined. Based on the number of spermatogonia B per cyst (469.2 ± 9.92), we estimated that spermatogonia undergo at least ...
Rodrigues, Maira da Silva   +4 more
openaire   +4 more sources

Catálogo de ejemplares tipo de la colección ictiológica del Museo de La Plata. Adenda 2015 [PDF]

open access: yes, 2015
Fil: Miquelarena, Amalia María. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Nadalin, Diego Oscar. División Zoología Vertebrados.
Miquelarena, Amalia María   +1 more
core  

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