The Crustacean Isopod Genus Gnathia Leach from Queensland Waters with Descriptions of Nine New Species

Holdish, DM; Harrison, K.C.

doi:10.1071/mf9800215

Cited by 48 publications

(41 citation statements)

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“…Marine gnathiid isopods have a biphasic life cycle. The juveniles of gnathiids live on fish as ectoparasites; their adults live freely in mudsand bottom habitat (Kabata 1970;Holdich and Harrison 1980;Charmantier et al 1987).…”

Section: Introductionmentioning

confidence: 99%

Infestation status of gnathiid isopod juveniles parasitic on Dusky grouper (Epinephelus marginatus) from the northeast Mediterranean Sea

Genc

2007

Parasitol Res

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This is the first detailed documented record of Gnathiid isopod praniza larvae infestating dusky grouper, (Epinephelus marginatus Lowe 1834) in the northeast Mediterranean Sea (36 degrees 36'N-36 degrees 07'E, 35 degrees 52'N-36 degrees 25'E). Fish were sampled monthly from Iskenderun Bay during a 3-year period from 2000 to 2003 [N = 468, W+/-SD (range) = 503.69+/-342.35 g (177-2,832 g), TL+/-SD (range) = 32.39+/-9.22 cm (16.1-67.0 cm), W (total) = 0.213L (total) (2.19), r (total) (2) = 0.85]. Juveniles of the Gnathia sp. were only extracted from the epithelium of the buccal cavity. The monthly and seasonal patterns in infestation rates (mean prevalence, P = 27.35% and mean intensity, MI+/-SD = 21.35+/-16.19), and the relationship between length-weight and infested/non-infested fish were calculated. This study suggests that gnathiid parasite has no effect on the growth and general health condition of infested fish, although high intensities were observed in fish.

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Section: Introductionmentioning

confidence: 99%

Infestation status of gnathiid isopod juveniles parasitic on Dusky grouper (Epinephelus marginatus) from the northeast Mediterranean Sea

Genc

2007

Parasitol Res

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“…comm.). The taxonomic characters of gnathiid isopods are based on adult males (Holdich & Harrison 1980); therefore, when live larvae were available, they were reared to adult males for identification (Grutter unpubl.). All reared larvae were Gnathia sp.…”

Section: Hatscheha Hemigymnimentioning

confidence: 99%

Spatial and temporal variations of the ectoparasites of seven reef fish species from Lizard Island and Heron Island, Australia

Grutter¹

1994

Mar. Ecol. Prog. Ser.

141

128

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Spat~al and temporal variations in abundance of ectoparasites from 7 coral reef fish species [Hemigyrnnus melapterus (Labridae), Siganus doliatus (Siganidae), Scolopsis bilinea tus (Nemipteridae), Thalassoma lunare (Labridae), Scarus sordidus (Scaridae), Ctenochaetus stn'atus (Acanthuridae), and Acanthochromis polyacanthus (Pomacentridae)] at 2 locations, Lizard Island and Heron Island in the Great Barner Reef, were investigated. The study demonstrates that there is a significant species-specific parasite fauna wh~ch is conserved over space and time. Host identity explained most of the variation in parasite composition and abundance while host size explained a smaller proportion of the variation. For each species the parasite assemblage showed little variation among local, but physically varied, sites. Species-specific patterns of parasite abundance were similar between widely separated locations, although there were more categories of parasites at the northern locat~on, Lizard Island. Parasite numbers and species composition among fish species at Lizard Island d~d not vary anlong collection times except for S. doliatus, which had a 7-fold increase between May 1992 and January 1993, mainly due to dactylogyridean monogeneans. Parasite abundance was positively correlated with fish standard length for 3 fish species.

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“…Both species have conical superior frontolateral processes and an inferior mediofrontal process with a slightly indented apex (Holdich and Harrison 1980). Our species differs from the Australian species in the shape of the pleotelson, the presence of a semicircular row of tubercles on the lateral sides of the cephalosome, the presence of long plumose setae on the rami of the pleopods and in the endopod of pleopod 2 having an appendix masculina.…”

Section: Discussionmentioning

confidence: 71%

“…Gnathia nkulu shows some resemblance to the Australian species Gnathia biorbis Holdich et Harrison, 1980, especially in the shape of the frontal border. Both species have conical superior frontolateral processes and an inferior mediofrontal process with a slightly indented apex (Holdich and Harrison 1980).…”

Section: Discussionmentioning

confidence: 99%

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A new species, Gnathia nkulu sp. n. (Crustacea: Isopoda: Gnathiidae) from southern Africa

Smit¹,

As²

2000

FOLIA PARASIT

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Abstract.A new species, Gnathia nkulu sp. n. is described from material collected off the South African coast at 80-200m depth. It differs from the intertidal species Gnathia africana Barnard, 1914 in that the mediofrontal process is not deeply divided into two lobes, article 2 of the pylopod is rounded and small wart-like tubercles and long simple setae are present on both the cephalosome and pereon.

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The Crustacean Isopod Genus Gnathia Leach from Queensland Waters with Descriptions of Nine New Species

Cited by 48 publications

References 0 publications

Infestation status of gnathiid isopod juveniles parasitic on Dusky grouper (Epinephelus marginatus) from the northeast Mediterranean Sea

Infestation status of gnathiid isopod juveniles parasitic on Dusky grouper (Epinephelus marginatus) from the northeast Mediterranean Sea

Spatial and temporal variations of the ectoparasites of seven reef fish species from Lizard Island and Heron Island, Australia

A new species, Gnathia nkulu sp. n. (Crustacea: Isopoda: Gnathiidae) from southern Africa

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