| Life cycle of the temporary fish parasite, Gnathia africana (Crustacea: Isopoda: Gnathiidae). | |
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MedLine Citation:
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PMID: 14560975 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Laboratory work was conducted to elucidate the life cycle of the South African gnathiid isopod, Gnathia africana Barnard, 1914. The natural fish hosts of this temporary parasite, the super klipfish Clinus superciliosus (Linnaeus, 1758), were exposed to gnathiid larvae in the laboratory. It was found that G. africana has three larval stages, consisting of three unfed (zuphea) and three fed (praniza) stages. First-, second- and third-stage zuphea larvae took an average of 2 h 18 min, 2 h 43 min and 10 h 8 min respectively to complete their feeding and the first- and second-stage praniza moulted at 8 and 10 days respectively into the next zuphea stage. Three to six days after its last blood meal, the sex of the third and final praniza stage could be determined by the presence of either a testis or two ovaries in the dorsal pereon. Male larvae moulted into adult males between 8 and 10 days post feeding. Female larvae moulted at approximately 17 days into adult females. Fertilisation of the eggs by the male took place within 24 hours of completion of the female moult. The development of the embryos and subsequent release of the young larvae between 15 and 23 days post fertilisation completed the cycle. This entire cycle took approximately 62 days in water temperatures of 20-25 degrees C. |
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Authors:
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Nico J Smi; Linda Basson; Jo G Van As |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Folia parasitologica Volume: 50 ISSN: 0015-5683 ISO Abbreviation: Folia Parasitol. Publication Date: 2003 Jun |
Date Detail:
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Created Date: 2003-10-16 Completed Date: 2003-12-11 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0065750 Medline TA: Folia Parasitol (Praha) Country: Czech Republic |
Other Details:
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Languages: eng Pagination: 135-42 Citation Subset: IM |
Affiliation:
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School of Life Sciences, Kingston University, Penrhyn Road, Kingston upon Thames, Surrey, KT1 2EE, UK. nsmit@botzoo.uct.ac.za |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Ectoparasitic Infestations / parasitology, veterinary* Female Fish Diseases / parasitology* Fishes / parasitology Isopoda / anatomy & histology, growth & development* Larva / anatomy & histology, growth & development Life Cycle Stages Male |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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