Sea lice Lepeophtheirus spinifer, Tuxophorus sp. and Caligus sp. infections on wild-caught queenfish Scomberoides commersonnianus from northern Australia
| Autor: | J P J O'Carroll, B K Diggles, M Landos, Michelle M. Dennis, L Barnes |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Caligus Range (biology) Zoology Aquatic Science 01 natural sciences 030308 mycology & parasitology Copepoda 03 medical and health sciences Fish Diseases Parasite hosting Animals Ecology Evolution Behavior and Systematics 0303 health sciences biology 010604 marine biology & hydrobiology Australia Fishes biology.organism_classification Wild caught Perciformes Scomberoides commersonnianus Lepeophtheirus Northern australia Queensland Copepod |
| Zdroj: | Diseases of aquatic organisms. 143 |
| ISSN: | 0177-5103 |
| Popis: | Studies of ectoparasites of wild-caught queenfish Scomberoides commersonnianus from several areas in northern Australia were reviewed to investigate relationships between parasite burdens, environmental conditions and external lesions. A sample of 27 queenfish captured near a dredge spoil disposal site in Gladstone Harbour, Queensland, Australia, in January 2012 was anomalous, with a high percentage of fish (66.6%) exhibiting grossly visible skin lesions including foci of erythema and petechial haemorrhages, particularly on the pectoral girdle and ventrolateral surfaces. Microscopically, lesions comprised acute epidermal erosion, ulceration and/or perivascular dermatitis with dermal oedema and depigmentation. Skin lesions were associated with high prevalence (100%) and intensity (mean = 21.2 copepods fish-1, range 4-46) of infection by sea lice Lepeophtheirus spinifer. Only queenfish infected with >10 L. spinifer presented with skin lesions. This is the first record of L. spinifer from Australia. In contrast, grossly visible skin lesions were not reported from queenfish (n = 152) sampled from other sites in the Northern Territory and Queensland, where the sampled fish had a much lower prevalence (51.3%) and intensity (mean = 3.54, range 0-26) of copepod (L. spinifer, Caligus spp. and Tuxophorus sp.) infections. Copepods from queenfish in studies undertaken outside Gladstone Harbour exhibited an over-dispersed pattern of infection, with the vast majority (n = 137, or 90.1%) of fish infected with L. spinifer infections, combined with poor water quality and/or direct exposure to contaminated dredge spoil and blooms of the cyanobacterium Lyngbya majuscula, can be associated with cutaneous disease in wild-caught queenfish. |
| Databáze: | OpenAIRE |
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