Assessment of Biological and Sanitary Condition of Alien Fish from a High-Mountain Lake (Cottian Alps)

被引：13
|
作者：
Pastorino, Paolo [1 ,2 ]
Prearo, Marino [2 ]
Bertoli, Marco [1 ]
Menconi, Vasco [2 ]
Esposito, Giuseppe [3 ]
Righetti, Marzia [2 ]
Mugetti, Davide [2 ]
Pederiva, Sabina [2 ]
Abete, Maria Cesarina [2 ]
Pizzul, Elisabetta [1 ]
机构：
[1] Univ Trieste, Dept Life Sci, Via Giorgieri 10, I-34127 Trieste, Italy
[2] Vet Med Res Inst Piemonte Liguria & Valle dAosta, Via Bologna 148, I-10154 Turin, Italy
[3] Univ Sassari, Dept Vet Med, Via Vienna 2, I-07100 Sassari, Italy
来源：
WATER | 2020年 / 12卷 / 02期
关键词：
non-native species; Alpine lakes; Alps; brook trout; Carnobacterium spp; heavy metals; TROUT SALVELINUS-FONTINALIS; BROOK TROUT; ALPINE LAKES; FOOD; PREY; DIET; AGE; CARNOBACTERIUM; TERRESTRIAL; COMMUNITIES;
D O I：
10.3390/w12020559
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study aimed to assess the biological and sanitary conditions of alien fish in a high-mountain lake (Balma Lake) located in the Cottian Alps. A single fish sampling session (August 2018) using gillnets collected 90 specimens of brook trout (Salvelinus fontinalis). Sex and age were determined (59 females and 31 males, age class 0+ to 4+). Regression analysis showed no difference in total weight and total length between males and females (ANCOVA: F = 0.453; p = 0.954). The mean condition factor (K-mean) decreased with increasing age for males and females. Terrestrial insects were the main prey found in the fish stomachs. The parasitological exam was negative, and the bacteriological exam was positive for Carnobacterium maltaromaticum and C. divergens in 33% of specimens. The total mercury, cadmium, and lead concentration in muscle tissue was within the maximum limit established by the European Commission for human consumption. The brook trout population was found to be well structured; these findings may help local administrations in the implementation of eradication measures.
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页数：14
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