Estadios do desenvolvimento embrionário do piavuçu <em>Leporinus macrocephalus</em> (Garavello & Britski, 1988)

Abstract

Understanding the embryogenesis of a species is a useful tool for locating areas for spawning and for the study of growth of the species in their natural environment. This study was conducted at the Panamá Fish Hatchery in Santa Catarina, Brazil, to characterize the embryonic development of the piavuçu Leporinus macrocephalus (Characiformes, Anostomidae). Description was based on the analysis of embryos collected at 10-minute intervals during the first three hours after fertilization, and later at 30-minute intervals until larva hatching. Piavuçu eggs are detached, transparent, small, spherical, with a large perivitelline space. Hatching takes place 11 hours and 30 minutes after fertilization at an average temperature of 28.2°C. Total length and weight of recently hatched larva were 2.39 ± 0.12 mm, and 0.5 ± 0.1mg respectively.

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

“…Embryogenesis and larval development are important stages of the biological cycle for providing information about fish biology, systematics and evolution, especially of aspects related to ontogeny, feeding, reproduction and behaviour. The duration of embryogenesis varies according to the reproductive strategy of the species and is affected by environmental factors, mainly temperature (Reynalte‐Tataje et al , 2001). The times for complete resorption of the yolk sac and for mouth opening varies among species and are critical stages in aquaculture, since they indicate the need for exogenous feeding (Sato et al , 2003 a ).…”

Comparative morphology of the oocyte surface and early development in four characiformes from the São Francisco River, Brazil

“…The short duration of embryogenesis as observed in this study, varying from 17 to 26 h at 24 ± 1°C for species from the São Francisco River (Rizzo and Bazzoli, 2014) is usually found in Neotropical species that present nonadhesive eggs, high fecundity, and no parental care (Reynalte‐Tataje et al, ; Ninhaus‐Silveira et al, ; Gomes et al, ; Isaú et al, ). This developmental pattern might allow scattering of eggs to develop in marginal lagoons where they are subject to higher predation.…”

Biología reproductiva de Liseta Leporinus muyscorum Steindachner, 1901 en el río Sinú, Colombia

“…In Brazil, Leporellus vittatus presents 1212 µ, Schizodon nasutus 1232 µ, Leporinus lacustris 1259 µ and L. friderici 1060 µ, also in the Upper Paraná River (7). In captivity, L. muyscorum in Colombia has an observed mean diameter of 929 µ (18), while L. macrocephalus in Brazil is 1215 µ (19). These differences can be associated with each species' fecundity.…”

“…En Brasil, Leporellus vittatus presenta 1212 µ, Schizodon nasutus 1232 µ, Leporinus lacustris 1259 µ y L. friderici 1060 µ, también en el Alto río Paraná (7). En cautiverio, para L. muyscorum en Colombia el diámetro promedio observado es de 929 µ (18), mientras que para L. macrocephalus en Brasil es de 1215 µ (19); diferencias pueden estar asociadas con la fecundidad de cada especie.…”