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Effects of epitheliocystis on serum lysozyme activity and osmoregulation in cultured juvenile striped trumpeter, Latris lineata (Forster)

Citation

Lai, CC and Crosbie, PBB and Battaglene, SC and Nowak, BF, Effects of epitheliocystis on serum lysozyme activity and osmoregulation in cultured juvenile striped trumpeter, Latris lineata (Forster), Aquaculture, 388-391, (1) pp. 99-104. ISSN 0044-8486 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier B.V.

DOI: doi:10.1016/j.aquaculture.2013.01.020

Abstract

Cultured juvenile striped trumpeter, Latris lineata (Forster), were sampled at two time points in spring (68 fish) and autumn (48 fish) to assess the prevalence and severity of epitheliocystis and associated physiological impacts. Prevalence of epitheliocystis was 49.2% in spring and 100% in autumn. Fish sampled in spring had low mean density of epitheliocystis induced cysts at 0.39±0.08 per cm2 whereas those fish sampled in autumn had significantly higher mean cyst density at 134.93±15.81 (pb0.05). The mean diameter of cysts did not differ and itwas 47.9±3.41 ́min spring and 50.7±0.50 ́min autumn. The cystswere positioned at the tips or along lamellae. Host response was affected by the severity of infection. Histological examination revealed little host response in striped trumpeter with low densities of cysts; however proliferative responses, including lamellar fusion due to epithelial hyperplasia and inflammation, were present in fish that had higher cyst densities. Serum osmolality and lysozyme activity were positively correlated with the densities of cysts in juvenile striped trumpeter (pb0.001). Furthermore, the osmolality and lysozyme activity of infected striped trumpeter were significantly elevated compared with the non-infected striped trumpeter (pb0.05). Histological examination revealed the absence of chloride cells at the base of the gill lamellae in the vicinity of the cysts, which may explain the elevation of osmolality in the individuals affected by epitheliocystis. However, the counts of chloride cells in the interlamellar areas did not differ between the fish with high and normal osmolality (p>0.05). This study describes the first case of epitheliocystis in striped trumpeter and reports associated physiological effects.

Item Details

Item Type:Refereed Article
Keywords:Epitheliocystis,Lysozyme,Osmoregulation,Striped trumpeter,Aquaculture
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Fin Fish (excl. Tuna)
Author:Lai, CC (Mr Cheng Lai)
Author:Crosbie, PBB (Dr Philip Crosbie)
Author:Battaglene, SC (Associate Professor Stephen Battaglene)
Author:Nowak, BF (Professor Barbara Nowak)
ID Code:82806
Year Published:2013
Web of Science® Times Cited:6
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2013-02-19
Last Modified:2014-04-14
Downloads:1 View Download Statistics

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