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Comparison of age estimates from various hard parts for redfin perch, Perca fluviatilis, in Tasmania


Jatmiko, I and Haddy, J and Williams, M, Comparison of age estimates from various hard parts for redfin perch, Perca fluviatilis, in Tasmania, Indonesian Fisheries Research Journal, 19, (1) pp. 47-54. ISSN 0853-8980 (2013) [Non Refereed Article]

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Whole otoliths, sectioned otoliths, scales and vertebrae were used to select the most suitable for age determination of redfin perch, Perca fluviatilis. Redfin perch were sampled from Trevallyn Lake and Brushy Lagoon using fyke nets, gillnets, electrofishing and rod and line angling. Age estimates were assessed for comparison between readings and among structures. One-way ANOVA of readability scores highlighted that sectioned otolith was the most obvious compare to other hard parts. Sectioned otoliths also showed the highest (93.9%) agreement between readings, followed by vertebrae (68.7), scales (38.8) and whole otoliths (29.9). Furthermore, there were no significantly different (p > 0.05) between first and second readings from sectioned otolith and vertebrae but significantly different (p < 0.05) to those from scales and whole otoliths. When sectioned otoliths’ ages were compared with other structures, vertebrae showed the highest (47.6%) agreement to those followed by scales (25.2%) and whole otoliths (20.4%). Age estimates from sectioned otoliths were significantly different (p < 0.05) to the values obtained from vertebrae, scales and whole otoliths. This finding demonstrated that sectioned otoliths are the best hard part for age determination for redfin perch in Tasmania.

Item Details

Item Type:Non Refereed Article
Keywords:age determination, redfin perch, Perca fluviatilis
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Haddy, J (Dr James Haddy)
UTAS Author:Williams, M (Mr Mike Williams)
ID Code:99826
Year Published:2013
Deposited By:IMAS Research and Education Centre
Deposited On:2015-04-10
Last Modified:2015-04-10

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