| Full text | |
| Author(s): |
De Campos, Carlos Jose Alexandre
[1]
;
Migotto, Alvaro Esteves
[2, 3]
;
Pinheiro, Ulisses
[4]
;
Marques, Antonio Carlos
[3]
Total Authors: 4
|
| Affiliation: | [1] Ctr Environm Fisheries & Aquaculture Sci Cefas, Weymouth Lab, Weymouth DT4 8UB, Dorset - England
[2] Univ Sao Paulo, Ctr Biol Marinha, Sao Sebastiao - Brazil
[3] Univ Sao Paulo, Inst Biociencias, Dept Zool, Sao Paulo - Brazil
[4] Univ Fed Pernambuco, Ctr Ciencias Biol, Dept Zool, Recife, PE - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | MARINE BIOLOGY RESEARCH; v. 8, n. 7, p. 573-583, 2012. |
| Web of Science Citations: | 5 |
| Abstract | |
The hydroid Zyzzyzus warreni is usually found in shallow coastal waters forming aggregations of solitary polyps embedded in demosponges. Early life history transformations and settlement responses by the actinulae of this hydroid were studied in the laboratory using 13 species of sponges and 2 species of algae collected in the Sao Sebastiao Channel (Brazil) as substrata. The absence of oral tentacles and mouth in the actinulae and early events of metamorphosis suggest that these larvae are unable to spend long periods in the plankton and attach quickly near conspecifics when a preferred substratum is encountered. The time required for settlement and the number of elicited settlings indicated four settlement responses: (a) frequent and short-time settlement, in actinulae exposed to Halichondria cebimarensis, Mycale angulosa, M. aff. americana, M. laxissima (skeleton) and Tedania ignis; (b) moderate and delayed settlement, in actinulae exposed to Aplysina caissara, A. fulva, Haliclona melana and M. microsigmatosa; (c) no settlement, in actinulae exposed to Suberites aurantiacus and to the algae Hypnea musciformis and Sargassum cymosum; and (d) lethal response, in actinulae exposed to Amphimedon viridis, Aplysilla rosea, Dragmacidon reticulatum and M. laxissima. These responses indicate a considerable degree of species discrimination by the actinulae and are consistent with substrata used by the hydroid in the natural environment. (AU) | |
| FAPESP's process: | 06/05821-9 - Molecular phylogeny of the Anthomedusae (Cnidaria: Hydrozoa) |
| Grantee: | Alvaro Esteves Migotto |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 11/50242-5 - Dimensions of marine life: patterns and process of diversifications in planktonic and benthic cnidarians |
| Grantee: | Antonio Carlos Marques |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |
| FAPESP's process: | 98/07090-3 - Benthic marine biodiversity in the state of São Paulo |
| Grantee: | Antonia Cecília Zacagnini Amaral |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |
| FAPESP's process: | 04/09961-4 - Biodiversity, evolution, endemism and conservation of the Medusozoa from the Southwestern Atlantic |
| Grantee: | Antonio Carlos Marques |
| Support Opportunities: | Research Projects - Thematic Grants |