Hatching rhythms in the capsalid monogeneans Benedenia lutjani from the skin and B. rohdei from the gills of Lutjanus carponotatus at Heron Island, Queensland, Australia

Ernst I. and Whittington I.D. (1996) Hatching rhythms in the capsalid monogeneans Benedenia lutjani from the skin and B. rohdei from the gills of Lutjanus carponotatus at Heron Island, Queensland, Australia. International Journal for Parasitology, 26 11: 1191-1204. doi:10.1016/S0020-7519(96)00118-X


Author Ernst I.
Whittington I.D.
Title Hatching rhythms in the capsalid monogeneans Benedenia lutjani from the skin and B. rohdei from the gills of Lutjanus carponotatus at Heron Island, Queensland, Australia
Journal name International Journal for Parasitology   Check publisher's open access policy
ISSN 0020-7519
Publication date 1996-01-01
Sub-type Article (original research)
DOI 10.1016/S0020-7519(96)00118-X
Volume 26
Issue 11
Start page 1191
End page 1204
Total pages 14
Language eng
Subject 2405 Parasitology
2725 Infectious Diseases
Abstract Spontaneous hatching of eggs of Benedenia lutjani and B. rohdei occurred after incubation for 4-6 days and 6-10 days, respectively, at a constant temperature in the range 22-28°C when exposed to natural illumination or to alternating 12-h periods of light and darkness (LD12;12; light on, 06.00 h; light off, 18.00 h). Under these conditions, hatching of the eggs of both species was rhythmical, all larvae emerging only during periods of illumination. Hatching was not confined to particular times within the illuminated period. Evidence for an endogenous component to the rhythm was revealed by transfer of eggs from LD12:12 to continuous darkness (DD) near the end of the incubation period. Hatching also occurred only during periods of illumination when eggs of each species were incubated under a DL12:12 regime (i.e. period of iliumination 18.00 h to 06.00 h; period of darkness 06.00 h to 18.00 h). When the eggs of B. lutjani and B. rohdei were laid and incubated in DD or continuous illumination (LL), some degree of rhythmicity persisted, raising the possibility that the eggs inherit circadian rhythmicity from their parent. The hatching patterns of these 2 species of monogeneans are discussed in relation to host finding, host behaviour and limited observations on the behaviour of the oncomiracidia after hatching.
Keyword Benedenia lutjani
Benedenia rohdei
capsalids
circadian rhythmicity
egg-hatching
eggs
hatching rhythm
Lutjanidae
Lutjanus carponotatus
monogeneans
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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