Cvetkovikj, Aleksandar and Radeski, Miroslav and Blazhekovikj - Dimovska, Dijana and Kostov, Vasil and Stevanovski, Vangel (2013) FIN DAMAGE OF FARMED RAINBOW TROUT IN THE REPUBLIC OF MACEDONIA. Macedonian Veterinary Review, 36 (2). pp. 73-83. ISSN 1857-7415

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The aims of this study were to determine the prevalence of fi n damage in farmed rainbow trout and to see whether the level of damage differed between different fi sh categories and farms. The study was fi eld based and included the fi n damage analysis and clinical description of the damaged fi ns. Fins were analyzed in two categories of fi sh [weight below 30g (min. 5g) and over 100g (max. 250g)]. Thirty fi sh per category were randomly selected, netted and each rayed fi n was assessed and photographed (total of 5880 fi ns were analyzed in 840 fi sh from seven rainbow trout farms). The prevalence of fi n damage was 100% and there was a large range in the level of damage which was mainly characterized by surface abrasions. Worst affected fi ns in both fi sh categories were dorsal and pectoral fi ns. Fin damage was present to a lesser degree in the smaller categories, but there was fi n damage in the smallest fi sh examined. Pattern of damage was Dorsal Pectoral>Abdominal>Anal>Tail fi n. Differences in fi n damage in all surveyed farms indicate that some factor or group of factors specifi c to each farm infl uence the extent of damage. Fin damage is operational welfare indicator and future research should identify and explore the impact of the factors affecting fi n damage and propose management practices that can minimize the level of fi n damage. Additional knowledge is needed to identify whether fi n damage is etiologically connected to different production system, handling procedures or another background.

Item Type: Article
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Veterinary science
Divisions: Faculty of Biotechnical Sciences
Depositing User: Prof. d-r. Gordana Dimitrovska
Date Deposited: 02 Apr 2020 17:10
Last Modified: 21 Apr 2020 22:40

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