2025/07/01 by Ian Solon Bortoloci Ito, I Ito, Mariana Pascoal Boaretto +3 · 1 voice · 1 citation
Agricultural and Biological Sciences · Environmental Science · #Fish Biology and Ecology Studies #Fish Ecology and Management Studies #Fish biology, ecology, and behavior
paper · pdf · doi:10.1002/jmor.70065
openalex publication_date 2025/07/01 · openalex created_date 2025/07/12 · openalex updated_date 2026/07/30
Leporinus oliveirai is a recently described species from Serra do Cachimbo, Pará State, Brazil, notable for its small size and vibrant coloration. This species has been successfully reproduced in captivity and is commercially traded internationally. Herein, we describe the early development of Leporinus oliveirai, documenting its external morphology with photographs and illustrations. The ontogeny of L. oliveirai is compared with that of other anostomids for which ontogenetic data are available, and developmental patterns are described for the family. In Anostomidae, the critical processes associated with the transition to exogenous feeding occur within the first 5 days post-hatching. Fin formation occurred in two distinct phases: the anal, dorsal, caudal, and adipose fins developed first, followed by the pelvic and pectoral fins. The sequence of fin ossification in anostomids is generally consistent with patterns described for other Characiformes. Additionally, a marked increase in growth rate and indications of allometric growth were observed following notochord flexion.