Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829)
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...
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000100109&lng=en&tlng=en |
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| author | A. C. S. Sampaio Nakauth M. A. Villacorta-Correa M. R. Figueiredo G. Bernardino J. M. França |
| author_facet | A. C. S. Sampaio Nakauth M. A. Villacorta-Correa M. R. Figueiredo G. Bernardino J. M. França |
| author_sort | A. C. S. Sampaio Nakauth |
| collection | DOAJ |
| description | 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) which was associated with rapid yolk absorption (more than 90% until 50 h AF), signaling the need for an exogenous nutritional source. The environmental conditions (especially temperature) influenced the time course of some events throughout the embryonic and larval development, suggesting the need for further studies on this subject. |
| first_indexed | 2024-12-11T08:04:03Z |
| format | Article |
| id | doaj.art-3f82717e1f8747f2b81d9719fe3a1ac8 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-11T08:04:03Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-3f82717e1f8747f2b81d9719fe3a1ac82022-12-22T01:15:03ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437576110911610.1590/1519-6984.13914S1519-69842016000100109Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829)A. C. S. Sampaio NakauthM. A. Villacorta-CorreaM. R. FigueiredoG. BernardinoJ. M. FrançaAbstract 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) which was associated with rapid yolk absorption (more than 90% until 50 h AF), signaling the need for an exogenous nutritional source. The environmental conditions (especially temperature) influenced the time course of some events throughout the embryonic and larval development, suggesting the need for further studies on this subject.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000100109&lng=en&tlng=enmatrinxãembryogenesisoocytes |
| spellingShingle | A. C. S. Sampaio Nakauth M. A. Villacorta-Correa M. R. Figueiredo G. Bernardino J. M. França Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) Brazilian Journal of Biology matrinxã embryogenesis oocytes |
| title | Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) |
| title_full | Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) |
| title_fullStr | Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) |
| title_full_unstemmed | Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) |
| title_short | Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829) |
| title_sort | embryonic and larval development of brycon amazonicus spix agassiz 1829 |
| topic | matrinxã embryogenesis oocytes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000100109&lng=en&tlng=en |
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