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| Pagliara, P.; Bouillon, J.; Boero, F.. |
| Settlement delays can be important to prevent propagule waste when proper settling substrates are not immediately available. Under laboratory conditions, the planulae of <i>Clytia viridicans</i> underwent two alternative developmental patterns. Some settled on the bottom, forming a hydranth-gonotheca complex that produced up to four medusae and later either degenerated or gave rise to a hydroid colony. Other planulae settled right below the air-water interface, forming floating colonies that eventually fell to the bottom and settled. <i>Halecium nanum</i> released planulae with a rich population of symbiotic zooxanthellae that survived into a rearing jar for three months. After a long period of apparent quiescence (possibly fuelled... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrozoa. |
| Ano: 2000 |
URL: http://www.vliz.be/imisdocs/publications/232425.pdf |
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| Miglietta, M.P.; Tommasa, L.D.; Denitto, F.; Gravili, C.; Pagliara, P.; Bouillon, J.; Boero, F.. |
| The behavioural patterns of 26 species of Antho- and Leptomedusae (with or without medusa stage) were investigated by video recordings. The analysed activities were: answers to mechanical stimuli, prey capture and ingestion, digestion, egestion, and swimming. The quantity of behavioural patterns identified in the small number of hydrozoan diversity studied so far is sufficient to demonstrate that these supposedly "simple" animals have evolved a complex array of responses to both external and internal stimuli. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthomedusae; Cnidaria [cnidarians]; Hydrozoa; Leptomedusae. |
| Ano: 2000 |
URL: http://www.vliz.be/imisdocs/publications/232610.pdf |
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