Results 71 to 80 of about 619 (114)
Comparative analysis of spermiogenesis and sperm ultrastructure in Callichthyidae (Teleostei: Ostariophysi: Siluriformes) [PDF]
, 2015 In Corydoradinae, the presence of spermatids in the lumen of the testicular tubules together with spermatozoa suggests that spermatogenesis is of the semicystic type, whereas in Callichthyinae, sperm production occurs entirely within spermatocysts in the
Oliveira, Claudio +2 more
core +2 more sources
FREQUÊNCIA ALIMENTAR NA LARVICULTURA DE PACAMÃ [PDF]
, 2016 The feeding frequencies on pacamã Lophiosilurus alexandri larviculture were evaluated. In the first phase, 10 days of active feeding, larvae with nine days post hatching (13.5 ± 0.7 mm) were stocked at density of 10 larvae L-1 in 5-L tanks each.
Luz, Ronald Kennedy +2 more
core
Neotropical Ichthyology, 2019 This study tested an external tag for juveniles of Lophiosilurus alexandri and measured the effects of tagging in different size classes of fishes. Experiment 1 evaluated the retention rate and influence of the tag on survival and growth of three hundred
Túlio P. Boaventura +4 more
doaj +1 more source
Neotropical IchthyologyLophiosilurus alexandri is an endemic fish from the São Francisco River basin, Brazil. The aim of this study was to induce L. alexandri to spawn and to obtain data on several reproductive variables for this species.
Hélio Batista dos Santos +3 more
doaj +1 more source
A new species of Farlowella (Siluriformes: Loricariidae) from the upper Bermejo River, La Plata River basin, northwestern Argentina [PDF]
, 2019 A new species of Farlowella is described from the Bermejo River basin, in Salta and Jujuy provinces, northwestern Argentina. The new species belongs to the Farlowella nattereri species group.
Aguilera, Gaston +4 more
core +2 more sources
Neotropical IchthyologyMicroglanis carlae, new species, is described from the río Paraguay basin and distinguished from its congeners by the following combination of characters: paired and anal fins mottled or with thin faint bands, trunk with dark-brown saddles, anterior ...
Héctor S. Vera Alcaraz +2 more
doaj +1 more source
Species Delimitation, Phylogenetics, and Biogeography of the Catfish Genus \u3ci\u3eRhamdia\u3c/i\u3e Bleeker (Heptapteridae) of Central America and the Trans-Andean Region of Colombia [PDF]
, 2015 A recent taxonomic revision of the Neotropical catfish genus Rhamdia (Pisces: Siluriformes: Heptapteridae) reduced a number of described species to synonymy, especially under a broadly circumscribed R. quelen. Evidence is presented here from DNA sequence
Hernández Torres, Carmen Liliana
core +1 more source
Zootaxa, 2006 Microglanis leptostriatus n. sp. is described from the middle-upper rio São Francisco basin. The new species is distinguished from its congeners by the following combination of characters: light transverse stripe, located in occipital region between the opercular openings, thin and sinuous; pale region below dorsal and adipose fins mottled with brown ...
HORÁCIO MORI, OSCAR A. SHIBATTA
openaire +2 more sources
Neotropical IchthyologyTwo new species of Microglanis are described from tributaries of upper-middle rio Araguaia, States of Mato Grosso and Goiás, Brazil. Microglanis oliveirai differs from its congeners by the short supraoccipital process not reaching the small anterior ...
William Benedito Gotto Ruiz +1 more
doaj +1 more source
Neotropical IchthyologyA new species of Microglanis from upper rio Paraguay basin is described. The species differs from congeners by the following combination of characters: deeply forked caudal fin with pointed lobes, bifurcated hook between antrorse and retrorse hooks on ...
Oscar Akio Shibatta
doaj +1 more source