Observations on the occurrence of the fish louse<i>Argulus japonicus</i>Thiele, 1900 in the western Transvaal

Kruger, I.; As, J. G. Van; Saayman, J.E.

doi:10.1080/02541858.1983.11447848

Cited by 22 publications

(4 citation statements)

References 5 publications

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“…Severe infestation of A. foliaceus, up to 800-1000 lice were reported from pond reared Cyprinus carpio in Turkey (Pekmezci et al, 2011). Our study corroborates with Kruger and Van-As (1983) where they described A. japonicus with 90% prevalence in different fish species of western Transvaal, South Africa. A. japonicus become potential threat to the wild and cultured fishes of UK and authorities were suggested for the careful examination of ornamental fishes before entry to the UK environment (Rushton-Mellor, 1992).…”

Section: Histopathological Effect In Catla Due To Argulosissupporting

confidence: 90%

Histopathological Studies of Pond Reared Indian Major Carp, Catla catla Infested with Argulus japonicus and Trial for Argulosis Treatment

Mamun¹,

Nasren²,

Rathore³

et al. 2021

PUJZ

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Section: Histopathological Effect In Catla Due To Argulosissupporting

confidence: 90%

Histopathological Studies of Pond Reared Indian Major Carp, Catla catla Infested with Argulus japonicus and Trial for Argulosis Treatment

Mamun¹,

Nasren²,

Rathore³

et al. 2021

PUJZ

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“…This paper follows previous reports on introduced and invasive parasites in the Vaal River; Argulus japonicus Thiele, 1900 (Crustacea: Branchiura), Schyzocotyle acheilognathi (Yamaguti, 1934) (Cestoda) (syn Bothriocephalus acheilognathi ) and Atractolycestus huronensis Anthony, 1958 (Cestoda) (Brandt et al, 1981; Dos Santos & Avenant‐Oldewage, 2022; Kruger et al, 1983, respectively the order is not correct it should be Kruger then Brandt and then Dos Santos to match the mening of respectively in the last sentence ). The addition of N. japonicus to this club of recent immigrants may signal unreported/illegal introduction/s of aquatic organisms.…”

Section: Discussionsupporting

confidence: 77%

Pathology caused by introduced Neoergasilus japonicus (Copepoda: Ergasilidae) to the skin of indigenous Tilapia sparrmanii in South Africa and scanning electron microscopy study of wound‐inflicting structures

Avenant‐Oldewage,

Nagasawa,

Dos Santos

et al. 2023

Journal of Fish Diseases

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Neoergasilus japonicus, a fish ectoparasite indigenous to eastern and southern Asia, has been introduced to various regions, including Europe and North and South America, where it spreads at an alarming rate. The parasite is not host‐specific. It was also collected from the Vaal‐Orange and Limpopo river systems in South Africa. This report describes the morphology of the wound‐inflecting structures in N. japonicus and relates their morphology to the pathological effect on Tilapia sparrmanii. Host tissue with parasites attached was imbedded in resin for histological sectioning and stained with haematoxylin and eosin. Additional specimens were prepared for scanning electron microscopy. Adult female parasites attach by inserting the hooked tips of the antennae into the epidermis. The maxillulae are minute but have sharp tips. The maxillae have sharp tips on the endopod and brush‐like setae on the exopod. The mandibles are armed with sharp tips. These structures are used to remove the epidermis of the host and brush it into the buccal cavity. Host tissue in the intestine confirms that adult females consume host tissue leaving the dermis exposed to opportunistic diseases. The microscopic size of the parasite prevents casual observation, and its occurrence in Africa is, therefore, probably underreported.

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“…The presence of G. sprostonae on L. aeneus in the Vaal River system is suspected to be a recent introduction as it was not reported in previous monogenean surveys (Crafford et al 2012; 2014a & b) conducted in this system. Furthermore, L. aeneus has been reported to host other invasive parasites, namely Schyzocotyle acheilognathi (Yamaguti, 1934) (Bertasso & Avenant-Oldewage 2005; Stadtlander et al 2011), Atractolytocestus huronesis Anthony, 1958 (Dos Santos & Avenant-Oldewage 2022) and Argulus japonicus Thiele, 1900 (Kruger et al 1983; Tam & Avenant-Oldewage 2006; Van As & Basson 1984;). The infection of L. aeneus with A. huronensis has also only recently been recorded, supporting Dos Santos & Avenant-Oldewage (2022) who speculated that a recent introduction of carp to the Vaal River system may have taken place.…”

Section: Discussionmentioning

confidence: 99%

Gyrodactylus sprostonaeLing, 1962 infects an indigenous cyprinid in southern Africa: An expanded description

2023

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Gyrodactylus sprostonae Ling, 1962 is a highly invasive parasite reported across freshwater environments of the northern hemisphere. The taxon was originally described from Carassius auratus (Linnaeus, 1758) and Cyprinus carpio Linnaeus, 1758 in China. This parasite has never been reported in Africa or the southern hemisphere. Recently, this taxon was collected from an indigenous yellowfish, Labeobarbus aeneus (Burchell, 1822), in the Vaal River, South Africa. The present study includes the conclusive identification of the gyrodactylid parasites collected from L. aeneus, including additional taxonomic data, using microscopy and molecular techniques. Microscopy included light microscopy (LM) of whole worms and scanning electron microscopy (SEM) of isolated haptoral sclerites. Additionally, morphometric data were obtained from SEM and compared to that generated using LM. For molecular analysis, the internal transcribed spacer (ITS) region of rDNA was amplified and phylogenetic topologies constructed. The specimens were morphometrically and genetically highly similar to other data for G. sprostonae. Additional point-to-point measurements and ITS rDNA sequences were generated for the taxon, contributing to the morphometric and molecular data for G. sprostonae. The study also includes the first study of the isolated haptoral sclerites of the taxon using SEM, with similar morphometric results to LM. This is the first record of G. sprostonae in the southern hemisphere and from a new, indigenous African host, L. aeneus, indicating host switching to smallmouth yellowfish. Furthermore, these results expand on the knowledge of the distribution of invasive parasites in South Africa, as well as Gyrodactylus species diversity in Africa.

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Observations on the occurrence of the fish louseArgulus japonicusThiele, 1900 in the western Transvaal

Cited by 22 publications

References 5 publications

Histopathological Studies of Pond Reared Indian Major Carp, Catla catla Infested with Argulus japonicus and Trial for Argulosis Treatment

Histopathological Studies of Pond Reared Indian Major Carp, Catla catla Infested with Argulus japonicus and Trial for Argulosis Treatment

Pathology caused by introduced Neoergasilus japonicus (Copepoda: Ergasilidae) to the skin of indigenous Tilapia sparrmanii in South Africa and scanning electron microscopy study of wound‐inflicting structures

Gyrodactylus sprostonaeLing, 1962 infects an indigenous cyprinid in southern Africa: An expanded description

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