Parasitic isopods (Gnathia sp.) reduce haematocrit in captive blackeye thicklip (Labridae) on the Great Barrier Reef

Captive Hemigymnus melapterus exposed to large numbers of cultured juvenile parasitic isopods (Gnathia sp.) had significantly lower haematocrit (median 27-62% +/- 5-83% inter-quartile range) than uninfected, control fish (median 32-73% +/- 4-90%). This study is the first to show that juvenile Gnathi...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Grutter, A. S., Jones, C. M.
Other Authors: J. F. Craig
Format: Article in Journal/Newspaper
Language:English
Published: Blackwell Publishing Ltd 2005
Subjects:
Fisheries
Marine & Freshwater Biology
Gnathia
Haematocrit
Hemigymnus Melapterus
Isopoda
Labridae
Atlantic Salmon
Lice Infection
Sea Lice
Crustacea
Fishes
Trout
Flabellifera
Performance
Cymothoidae
Anemia
C1
Atlantic salmon
Online Access:https://espace.library.uq.edu.au/view/UQ:76163
Description
Summary:Captive Hemigymnus melapterus exposed to large numbers of cultured juvenile parasitic isopods (Gnathia sp.) had significantly lower haematocrit (median 27-62% +/- 5-83% inter-quartile range) than uninfected, control fish (median 32-73% +/- 4-90%). This study is the first to show that juvenile Gnathia sp. reduce total blood volume in H. melapterus. The low haematocrit in infected fish was most likely due to plasma replacing erythrocytes lost as a result of isopods feeding on fish blood. (c) 2005 The Fisheries Society of the British Isles.

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