| Texto completo | |
| Autor(es): |
Moreano-Arrobo, Lola
;
Perez, Oscar D.
;
Brown, Federico D.
;
Oyarzun, Fernanda X.
;
Canales-Aguirre, Cristian B.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY; v. 65, n. 4-6, p. 10-pg., 2021-01-01. |
| Resumo | |
Elysia diomedea, otherwise known as the "Mexican dancer", aries in adult size and color across its geographical distribution in Ecuador. Because of morphological variation and the absence of genetic information for this species in Ecuador, we analyzed mtDNA sequences in three populations (Ballenita, La Cabuya, and Mompiche) and confirmed that individuals from the three locations belonged to E. diomedea and that there was no population structure that could explain their morphological differences. Next, we analyzed general aspects about the reproductive biology and embryology of this species. Live slugs from the Ballenita population were maintained and reproduced ex situ. Egg ribbons and embryos were fixed and observed by brightfield and confocal microscopy. We observed a single embryo per capsule, 98 embryos per mm(2) of egg ribbon, and compared the cleavage pattern of this species to that of other heterobranchs and spiralians. E. diomedea early development was characterized by a slight unequal first cleavage, occurrence of a 3-cell stage in the second cleavage, and the formation of an enlarged second quartet of micromeres. We observed clear yolk bodies in the egg capsules of some eggs ribbons at early stages of development. Both reproductive and embryological characteristics, such as presence of stomodeum in the larva, and ingestion of particles after hatching confirmed the planktotrophic veliger larvae of this species, consistent with the majority of sacoglossans from the Eastern and Northeast Pacific Oceans. (AU) | |
| Processo FAPESP: | 19/06927-5 - Impulsionando avanços técnicos para a pesquisa em biologia do desenvolvimento de ascídias coloniais: transgênese e mutagênese em Botryllus schlosseri |
| Beneficiário: | Federico David Brown Almeida |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |
| Processo FAPESP: | 18/50017-0 - Clonal strategies in subantartic and subtropical colonial ascidians |
| Beneficiário: | Federico David Brown Almeida |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 15/50164-5 - Células-tronco, brotação e a evolução da colonialidade em ascídias |
| Beneficiário: | Federico David Brown Almeida |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |