Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829)

Brazilian Journal of Biology = Revista Brasleira De Biologia
A C S Sampaio NakauthJ M França

Abstract

The objective of this study was to describe the embryonic and larval development of Brycon amazonicus, featuring the main events up to 50 hours after fertilization (AF). The material was provided by the Aquaculture Training, Technology and Production Center, Presidente Figueiredo (AM). The characterization was based on stereomicroscopic examination of the morphology of eggs, embryos and larvae and comparison with the literature. Matrinxã eggs are free, transparent, and spherical, with a perivitelline space of 0.56 ± 0.3 mm. The successive divisions give rise to cells with 64 blastomeres during the first hour AF. The gastrula stage, beginning 02 h 40 min AF, was characterized by progressive regression cells and the formation of the embryonic axis, leading to differentiation of the head and tail 05 h 30 min AF. From 06 to 09 h AF the somites, notochord, otic and optic vesicles and otoliths were observed, in addition to heart rate and the release of the tail. The larvae hatched at 10 h 30 min AF (29.9 °C), with a total length of 3.56 ± 0.46 mm. Between 19 and 30 h AF, we observed 1) pigmentation and gut formation, 2) branchial arches, 3) pectoral fins, 4) a mouth opening and 5) teeth. Cannibalism was initiated earlier (34 h AF) wh...Continue Reading

References

Jul 1, 1995·Developmental Dynamics : an Official Publication of the American Association of Anatomists·C B KimmelT F Schilling
May 14, 2005·Fish & Shellfish Immunology·I B Falk-Petersen
Jul 11, 2006·Zygote : the Biology of Gametes and Early Embryos·Alexandre Ninhaus-SilveiraAlexandre de Azevedo
Feb 16, 2007·Brazilian Journal of Biology = Revista Brasleira De Biologia·C R PereiraL B Silva
Dec 1, 2009·Zygote : the Biology of Gametes and Early Embryos·Juliana Sversut de AlexandreMilena Penteado Chaguri
May 11, 2013·Zygote : the Biology of Gametes and Early Embryos·Laura Satiko Okada NakaghiFrancisco Manoel de Braga

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Citations

Feb 23, 2020·Zygote : the Biology of Gametes and Early Embryos·Erika NeumannLaura Satiko Okada Nakaghi
May 10, 2020·Zygote : the Biology of Gametes and Early Embryos·Bruno Cavalheiro AraújoRenato Massaaki Honji

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