File(s) under permanent embargo
Osmoregulatory balance in Murray cod, Maccullochella peelii peelii (Mitchell), affected with chronic ulcerative dermatopathy
journal contribution
posted on 2008-08-01, 00:00 authored by Aaron SchultzAaron Schultz, Jillian Mary Healy, Paul Jones, Marie-Therese ToopThis study examined the osmoregulatory capability of Murray cod, Maccullochella peelii peelii, affected by chronic ulcerative dermatopathy (CUD) in intensive aquaculture. This condition appears to arise only in facilities utilizing groundwater, with the causative agent suggested to be a water-borne factor. Healthy Murray cod (~ 700 g) were transferred to a CUD-affected farm to monitor the progression of the syndrome and began to show signs of CUD after approximately five months. In order to evaluate possible effects of CUD on osmoregulation; plasma electrolyte concentrations, osmolality, and Na+,K+-ATPase activities were measured, and gill histology and immunohistochemistry were analyzed. Plasma electrolyte concentrations and osmolality of CUD-affected Murray cod were consistent with reference values determined for non CUD-affected fish. A greater number of gill mucous cells were observed in Murray cod cultured at the CUD-affected farm compared to non CUD-affected fish. We also found an un-identified cell type that was present solely in the gills of CUD-affected Murray cod. Gill Na+,K+-ATPase activity was significantly higher in severely CUD-affected Murray cod compared to individuals transferred to the CUD-affected farm. While there appeared to be some minor changes in the gills of CUD-affected fish, this study demonstrated that Murray cod were able to effectively osmoregulate, although, perhaps at an energetic cost.
History
Journal
AquacultureVolume
280Issue
1-4Pagination
45 - 52Publisher
Elsevier B.V.Location
Amsterdam, The NetherlandsPublisher DOI
ISSN
0044-8486eISSN
1873-5622Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2008, Elsevier B.V.Usage metrics
Categories
Keywords
Murray codpathologyosmoregulationchronic erosive dermatopathychronic ulcerative dermatopathyScience & TechnologyLife Sciences & BiomedicineFisheriesMarine & Freshwater BiologyTROUT ONCORHYNCHUS-MYKISSTHE-HEAD DISEASERAINBOW-TROUTACID-BASENA+\/K+-ATPASECOPPER EXPOSUREBLOOD-CHEMISTRYRICH CELLSGILLPLASMAZoology
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC