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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Comportamento reprodutivo de Mussismilia hispida (Verril, 1902) (Cnidaria, Anthozoa, Scleractinia)

Neves, Elizabeth Gerardo 24 July 1998 (has links)
Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-05-24T20:22:02Z No. of bitstreams: 1 273236.pdf: 8249989 bytes, checksum: 228941a9d93aeb88389dd37957d513c7 (MD5) / Made available in DSpace on 2018-05-24T20:22:02Z (GMT). No. of bitstreams: 1 273236.pdf: 8249989 bytes, checksum: 228941a9d93aeb88389dd37957d513c7 (MD5) Previous issue date: 1998-07-24 / FAPERJ / FUJB / CAPES / Através de análises histológicas foi verificado o padrão reprodutivo de Mussismilia hispida, espécie zooxantelada de coral, endêmica na costa brasileira. Fragmentos provenientes de 2 colônias fixas, as quais foram marcadas no campo para que pudessem ser repetidamente amostradas, e de 1O colônias escolhidas ao acaso foram mensalmente obtidos no periodo de abril/89 a março/90, na Praia da Tartaruga, Búzios, Rio de Janeiro. Os resultados mostraram que M. hispida é uma espécie hermafrodita sequencial, cujo modo de reprodução envolve a liberação de gametas para fertilização e desenvolvimento externos. Células femininas surgiram antes das masculinas e foram inicialmente observadas em abril/89. O tamanho dos ovócitos de Estágio 1, parcialmente imersos na camada mesogleal, variou de 13,04μm a 19,56μm. Entre fevereiro/90 e março/90, ovócitos alcançaram o máximo de amadurecimento e estavam aptos para fertilização. O maior ovócito... / Through histological analysis the reproductive pattern of Mussismilia hispida, a zooxanthellate coral species endemic to the Brazilian coast was verified. Fragments from 2 tagged colonies, which were marked in the field in order to be repeatedly sampled, and 10 others haphazardly chosen were collected monthly, from April/89 to March/90, at Praia da Tartaruga, Buzios, Rio de Janeiro. The results showed that M. hispida is a sequential hermaphroditic species with a broadcast-spawning mode of reproduction, and external fertilization and development. Female cells developed prior to male cells, and were first observed in April/89. Size of Stage I oocytes partially immersed into mesogleal layer ranged from 13,04μm to 19,56μm. Between February/90 and March/90, oocytes reached maximum ripeness and were ready for fertilization. The largest Stage III oocyte...

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