Observations on the attachment of a piscine gill parasitic ergasilid (Crustacea: Copepoda)

Oldewage, W.H.; As, J. G. Van

doi:10.1080/02541858.1987.11448063

Cited by 7 publications

(19 citation statements)

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“…This is the first report of an ergasilid being predominantly located on the outer dermis of its hosts. The majority of ergasilids infest the gills of their hosts and are rarely found on the skin or other tissues (Wilson 1911;Rogers and Hawke 1978;Oldewage and van As 1987); a notable exception is E. rhinos found in the nasal fossae of three species of sunfish (Flier Centrarchus macropterus, Pumpkinseed Lepomis gibbosus, and Redbreast Sunfish Lepomis auritus; Burris and Miller 1972). Threlfall (1981) report three specimens of E. auritus attached to the cornea of a landlocked Rainbow Smelt in a freshwater lake in Newfoundland (Black River Pond).…”

Section: Locations On Hostmentioning

confidence: 99%

Occurrence of the Parasitic Copepod Ergasilus labracis on Threespine Sticklebacks from the South Coast of Newfoundland

2014

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A study conducted from August to October 2013 surveyed Threespine Sticklebacks Gasterosteus aculeatus (n = 822) for the presence of parasitic copepods in the vicinity of large sea-cage salmonid farms in Bay d'Espoir, Newfoundland. The majority of parasitic copepods surveyed were Ergasilus labracis (n = 4,684). Other parasitic copepods observed on Threespine Sticklebacks during the survey included chalimus-stage Lepeophtheirus spp. (n = 3), adult Argulus alosae (n = 2), and a single Thersitina gasterostei. This represents a new host record for E. labracis. The copepods were present on fish collected in a broad range of temperatures (6.9-17.7°C) and salinities (10.2-30.2 [Practical Salinity Scale]). The parasitic copepods were most commonly found on larger hosts estimated to be age 1 or older. Surprisingly, the highest infestations (approximately 65%) were found on regions of the hosts outside of the gills (behind the pectoral fins and pelvic spines); in some cases, the copepods had inflicted significant damage to the skin of their hosts. Among host fish with evidence of an additional infection, such as microsporidian tumors (xenomas) or hemorrhagic-like symptoms (dark red abdomens and bloody mucus), the prevalence of E. labracis was significantly higher (43.4%) than among healthy fish (28.9%) despite there being no significant difference in size between the two fish health groups. In contrast, intensity (mean number of individual parasites per host) was significantly higher among healthy hosts (23.6) than among unhealthy ones (7.63). Although this parasite has been listed as present in Newfoundland previously, it has a broad host range and has been reported to be pathogenic to farmed salmonids. Therefore, its potential impact on wild and farmed fish populations around Newfoundland should not be underestimated.

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Section: Locations On Hostmentioning

confidence: 99%

Occurrence of the Parasitic Copepod Ergasilus labracis on Threespine Sticklebacks from the South Coast of Newfoundland

2014

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“…Ergasilus copepods occur widely distributed throughout Africa; they are nonhost-specific fish parasites (Wilson 1911; Oldewage and van As 1987) inhabiting fresh, marine, and brackish water (Boxshall and Defaye 2008). Four Ergasilus species occur in Lake Tanganyika E. flaccidus, E. kandti, E. megacheir , and E. sarsi Capart, 1944.…”

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confidence: 99%

“…Only females are parasitic and they attach with large modified second antennae. Although attachment and feeding may cause extensive pathological change to the gills, some Ergasilus species simply embrace the gill filament (Oldewage and van As 1987) while others (e.g., E. colomeus ) insert the third segment of the antennae into the host gill filament (Thatcher and Boeger 1983), causing terminal necrosis of the filament (Thatcher 2006). …”

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confidence: 99%

“…The parasite feed regularly in order to sustain the energy levels required for the parasitic lifestyle (Oldewage and van As 1987) and feeding involves secretion of proteolytic enzymes that aids in external digestion (Paperna 1996). …”

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confidence: 99%

“…Attachment results in compression of gill tissue (Oldewage and van As 1987). Furthermore, lesions may become secondarily infested by bacteria, fungi, and virus growth and an inflammatory response marked by an increase in Rodlet and mucus cells (Dezfuli et al 2003; Roubal 1989).…”

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confidence: 99%

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Infestation and Pathological Alterations by Ergasilus sarsi (Copepoda) on the Tanganyika Killifish from Africa

Kilian

Avenant‐Oldewage

2013

J Aqua Anim Hlth

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A total of 204 Ergasilus sarsi, a copepod, were collected from Tanganyika Killifish Lamprichthys tanganicanus in Lake Tanganyika during March 2010. The prevalence was 86.40%, the mean intensity was 7.56, and the mean abundance was 6.38. Only 27 of the fish were infested, and the highest infestation on one fish was 29. Proliferation of mucus cells and lamellar fusion occurred. Haemorrhage due to blood vessel compression was noted. This is the first record of E. sarsi from Tanganyika Killifish. This study is also the first to provide a description of the pathological alterations caused by E. sarsi.

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Ergasilid copepods (Poecilostomatoida) from the gills of primitive Mugilidae (grey mullets)

El-Rashidy

Boxshall

1999

Syst Parasitol

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All representatives of the subfamily Agonostominae of grey mullets in the collections of The Natural History Museum in London were examined for parasitic copepods. Agonostomus monticola, Joturus pichardi, Aldrichetta forsteri and Cestraeus goldiei were all infected by copepods. Three new species of Acusicola and two new species of Ergasilus were found: E. parabahiensis n. sp. on A. monticola from Guyana and E. acusicestraeus n. sp. on C. goldiei from Papua New Guinea. Acusicola spinuloderma n. sp. was found on A. monticola and J. pichardi collected from different localities in Central America, A. mazatlanesis n. sp. on the same host from west Mexico (Mazatlan) and A. joturicola n. sp. on J. pichardi from Panama. Descriptions of the five new species and a redescription of E. australiensis Roubal, from Aldrichetta forsteri, are presented. The host-parasite relationships and geographical distributions of hosts and their parasitic copepods are analysed.

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Observations on the attachment of a piscine gill parasitic ergasilid (Crustacea: Copepoda)

Cited by 7 publications

References 1 publication

Occurrence of the Parasitic Copepod Ergasilus labracis on Threespine Sticklebacks from the South Coast of Newfoundland

Occurrence of the Parasitic Copepod Ergasilus labracis on Threespine Sticklebacks from the South Coast of Newfoundland

Infestation and Pathological Alterations by Ergasilus sarsi (Copepoda) on the Tanganyika Killifish from Africa

Ergasilid copepods (Poecilostomatoida) from the gills of primitive Mugilidae (grey mullets)

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