Author:
Hadfield Kerry A.,Smit Nico J.,Avenant-Oldewage Annemarié
Abstract
The life cycle of the South African gnathiid isopod,Gnathia pilosus, was studied using the common east coast tidal pool fish,Scartella emarginataandAntennablennius bifilumas hosts. Laboratory studies observing the feeding ecology of these temporary ectoparasites determined that the second and third unfed larval stages (zuphea larvae 2 and 3) took an average of 3 hours 52 minutes and 4 hours 19 minutes to feed respectively. After feeding, the second stage fed larvae (praniza 2) took 35 days to moult into the third zuphea form. Male and female praniza 3 larvae could be discerned before their final moults into adults which took place approximately 42 and 48 days respectively after their blood meals. Fertilization occurred within 24 hours after the female had completed her moult. It was thus estimated that the complete life cycle from the first larval stage to adult took between 134 to 140 days in water temperatures ranging between 20°C and 25°C. The length for this life cycle is unexpectedly long for gnathiids living in subtropical waters and may indicate that water temperature is not always the main factor in determining the duration of gnathiid life cycles.
Publisher
Cambridge University Press (CUP)
Reference21 articles.
1. Contributions to the crustacean fauna of South Africa. 1. Additions to the marine Isopoda;Barnard;Annals of the South African Museum,1914
2. Population dynamics of the sponge-dwelling gnathiid isopod Elaphognathiacornigera
3. Skin toxins and external parasitism of coral-dwelling gobies
4. Contributions to the crustacean fauna of South Africa. 3. Additions to the marine Isopoda, with notes on some previously incompletely known species;Barnard;Annals of the South African Museum,1914
5. Gnathia pilosus sp. nov. (Crustacea, Isopoda, Gnathiidae) from the east coast of South Africa;Hadfield;Zootaxa,2008
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