scholarly journals EVALUATION OF THE RIVERS VILNIA AND SIESARTIS ECOTOXICOLOGICAL STATE BASED ON MORPHOLOGICAL INDEXES OF JUVENILE ATLANTIC SALMON (SALMO SALAR L.) / SIESARTIES IR VILNIOS UPIŲ EKOTOKSIKOLOGINĖS BŪKLĖS ĮVERTINIMAS PAGAL ATLANTINĖS LAŠIŠOS (SALMO SALAR L.) JAUNIKLIŲ MORFOLOGINIUS RODIKLIUS

2015 ◽  
Vol 7 (4) ◽  
pp. 424-429 ◽  
Author(s):  
Gintarė Sauliutė ◽  
Gintaras Svecevičius
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Physiological State ◽  
Chemical Parameters ◽  
Specific Chemical ◽  
Atlantic Salmon Salmo Salar ◽  
Physico Chemical ◽  
Salmon Juvenile ◽  
Chemical Factors ◽  
Somatic Index

Objective of the study – to evaluate ecotoxicological state of two probably differently polluted salmon rivers: the Vilnia and Siesartis based on Atlantic salmon (Salmo salar L.) juvenile’s morphological indexes. Statistical analysis of estimated fish morphometric parameters and morphological indexes showed that the Vilnia and Siesartis Rivers’ salmon juveniles differ significantly. Condition factor (CF) and the gills-somatic index (GSI) were found to be the most sensitive biomarkers reflecting the physiological state of the fish. The Vilnia River salmon juvenile CF and GSI value was significantly different as compared with the Siesartis River’s salmon juvenile indexes, apparently, due to the increased water pollution. Since according to the classical physico-chemical parameters, both rivers’ water was very similar [no significant differences were found (p > 0.1)], it was suggested that here exist other non-specific chemical factors (pollutants) in water, which determine fish physiological and indicate river ecotoxicological states. Tyrimo tikslas – įvertinti dviejų galimai skirtingai užterštų lašišinių upių Vilnios ir Siesarties ekotoksikologinę būklę pagal atlantinės lašišos (Salmo salar L.) jauniklių morfologinius rodiklius. Statistiškai apdorojus ir apskaičiavus žuvų morfometrinius parametrus bei morfologinius rodiklius, nustatyta, kad tirtos Vilnios ir Siesarties žuvys gerokai skiriasi. Žuvų įmitimo koeficientas (IK) ir žiaunų somatinis indeksas (ŽSI) – jautriausi biožymenys, atspindintys žuvų fiziologinę būklę. Vilnios upėje lašišų jauniklių IK ir ŽSI vertės gerokai skyrėsi, lyginant su Siesarties upės lašišų jauniklių rodikliais, tikriausiai dėl didesnės vandens taršos pirmojoje upėje. Kadangi pagal klasikinius fizinius ir cheminius vandens parametrus upės buvo labai panašios [patikimų skirtumų nenustatyta (p > 0,1)], galima teigti, kad egzistuoja kiti, nespecifiniai cheminiai veiksniai (teršalai) vandenyje, kurie lemia žuvų fiziologinę bei indikuoja upių ekotoksikologinę būklę.

Microstructure and texture of fresh and smoked Atlantic salmon, Salmo salar L., fillets from fish reared and slaughtered under different conditions

2001 ◽  
Vol 32 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Sjofn Sigurgisladottir ◽  
Margret S. Sigurdardottir ◽  
Helga Ingvarsdottir ◽  
Ole J. Torrissen ◽  
Hannes Hafsteinsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Persistence of Orally Administered Salmonella enterica Serovars Agona and Montevideo in Atlantic Salmon (Salmo salar L.)

2005 ◽  
Vol 68 (7) ◽  
pp. 1336-1339 ◽  
Author(s):  
L. L. NESSE ◽  
T. LØVOLD ◽  
B. BERGSJØ ◽  
K. NORDBY ◽  
C. WALLACE ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Salmonella Enterica ◽  
Most Probable Number ◽  
Fish Feed ◽  
Internal Organs ◽  
Probable Number ◽  
Atlantic Salmon Salmo Salar ◽  
Gastric Intubation

The objective of our experiments was to study the persistence and dissemination of orally administered Salmonella in smoltified Atlantic salmon. In experiment 1, salmon kept at 15°C were fed for 1 week with feed contaminated with 96 most-probable-number units of Salmonella Agona per 100 g of feed and then starved for 2 weeks. Samples were taken from the gastrointestinal tract and examined for Salmonella 1, 2, 8, 9, 15, and 16 days after the feeding ended. In experiment 2, Salmonella Agona and Montevideo were separately mixed with feed and administered by gastric intubation. Each fish received 1.0 × 108, 1.0 × 106, or 1.0 × 104 CFU. The different groups were kept in parallel at 5 and 15°C and observed for 4 weeks. Every week, three fish in each group were sacrificed, and samples were taken from the skin, the pooled internal organs, the muscle, and the gastrointestinal tract and examined for the presence of Salmonella. The results from the two experiments showed that the persistence of Salmonella in the fish was highly dependent on the dose administered. Salmonella was not recovered from any of the fish that were fed for 1 week with the lowest concentration of Salmonella. In the fish given the highest dose of Salmonella, bacteria persisted for at least 4 weeks in the gastrointestinal tract as well as, to some extent, the internal organs. The present study shows that under practical conditions in Norway, the risk of Salmonella in fish feed being passed on to the consumer of the fish is negligible.

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