NDLI: Scoring of the extent and intensity of carp (Cyprinus carpio) skin changes made by cormorants (Phalacrocorax carbo sinensis): relationship between morphometric and histological indices

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Scoring of the extent and intensity of carp (Cyprinus carpio) skin changes made by cormorants (Phalacrocorax carbo sinensis): relationship between morphometric and histological indices

Content Provider	Springer Nature Link
Author	Skorić, Stefan Rašković, Božidar Poleksić, Vesna Gačić, Zoran Lenhardt, Mirjana
Copyright Year	2011
Abstract	Cormorants cause damage to fish in aquaculture not only by consuming large number of fish but also by wounding them. Quantification of the actual damage in fish induced by wounding is important for reliable estimations of the overall loss in aquaculture caused by cormorants. In this study, specimens of mirror and scaly carp (Cyprinus carpio L.) injured by attacks of great cormorant (Phalacrocorax carbo L.) were collected from the “Ečka” fish farm in Serbia. Surfaces of superficial and open subepithelial wounds (expressed as a percent of the total body surface), estimated by computer-assisted image analysis, had mean values 10.66 ± 1.86 and 0.85 ± 0.90, respectively. Histological evaluation of wounds was performed by two scoring systems: system proposed by Bernet et al. (J Fish Dis 22:25–34, 1999) and modified system described by Wahli et al. (Aquaculture 225:371–386, 2003). The most frequent histopathological changes were disturbed epidermal structure and surface cell morphology and increased number of club cells (on more than 75% of specimens); increased number of melanocytes and their distribution in different layers in dermis; and enlarged hypodermis (more than 80% of samples) and myolysis (50% of samples). Comparison of wounds’ surfaces (surface of superficial injures) and histopathological changes, estimated by two scoring systems, revealed significant positive correlation. Bernet’s scoring system showed higher correlation coefficients, when compared with the modified Wahli’s scoring system.
Starting Page	525
Ending Page	535
Page Count	11
File Format	PDF
ISSN	09676120
Journal	Aquaculture International
Volume Number	20
Issue Number	3
e-ISSN	1573143X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-10-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carp Cormorant Histopathological changes Skin injuries Scoring system Zoology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Agronomy and Crop Science

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