Waste loadings from two freshwater Atlantic Salmon Juvenile farms in Scotland

1996 ◽  
Vol 86 (1-4) ◽  
pp. 235-249 ◽  
Author(s):  
M. M. Hennessy ◽  
L. Wilson ◽  
W. Struthers ◽  
L. A. Kelly
Keyword(s):  
Atlantic Salmon ◽  
Salmon Juvenile

scholarly journals Does global change increase the risk of maladaptation of Atlantic salmon migration through joint modifications of river temperature and discharge?

2021 ◽  
Vol 288 (1964) ◽  
Author(s):  
Elorri Arevalo ◽  
Anthony Maire ◽  
Stéphane Tétard ◽  
Etienne Prévost ◽  
Frédéric Lange ◽  
...  
Keyword(s):  
Global Change ◽  
Atlantic Salmon ◽  
Water Temperature ◽  
Aquatic Organisms ◽  
Local Environment ◽  
Freshwater Ecosystems ◽  
Global Changes ◽  
River Temperature ◽  
Salmon Juvenile ◽  
Key Events

In freshwater ecosystems, water temperature and discharge are two intrinsically associated triggers of key events in the life cycle of aquatic organisms such as the migration of diadromous fishes. However, global changes have already profoundly altered the thermal and hydrological regimes of rivers, affecting the timing of fish migration as well as the environmental conditions under which it occurs. In this study, we focused on Atlantic salmon ( Salmo salar ), an iconic diadromous species whose individuals migrate between marine nursery areas and continental spawning grounds. An innovative multivariate method was developed to analyse long-term datasets of daily water temperature, discharge and both salmon juvenile downstream and adult upstream migrations in three French rivers (the Bresle, Oir and Nivelle rivers). While all three rivers have gradually warmed over the last 35 years, changes in discharge have been very heterogeneous. Juveniles more frequently used warmer temperatures to migrate. Adults migrating a few weeks before spawning more frequently used warm temperatures associated with high discharges. This has already led to modifications in preferential niches of both life stages and suggests a potential mismatch between these populations' ecological preference and changes in their local environment due to global change.

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

Marine mammals are natural hosts of Oceanivirga salmonicida, a bacterial pathogen of Atlantic salmon

2020 ◽  
Vol 139 ◽  
pp. 161-174
Author(s):  
R Palmer ◽  
GTA Fleming ◽  
S Glaeser ◽  
T Semmler ◽  
A Flamm ◽  
...  
Keyword(s):  
16S Rrna ◽  
Atlantic Salmon ◽  
16S Rrna Gene ◽  
Marine Mammals ◽  
Rrna Gene ◽  
Bacterial Disease ◽  
Common Dolphin ◽  
Stenella Coeruleoalba ◽  
Striped Dolphin ◽  
Natural Hosts

During 1992 and 1993, a bacterial disease occurred in a seawater Atlantic salmon Salmo salar farm, causing serious mortalities. The causative agent was subsequently named as Oceanivirga salmonicida, a member of the Leptotrichiaceae. Searches of 16S rRNA gene sequence databases have shown sequence similarities between O. salmonicida and uncultured bacterial clones from the digestive tracts of marine mammals. In the current study, oral samples were taken from stranded dolphins (common dolphin Delphinus delphis, striped dolphin Stenella coeruleoalba) and healthy harbour seals Phoca vitulina. A bacterium with growth characteristics consistent with O. salmonicida was isolated from a common dolphin. The isolate was confirmed as O. salmonicida, by comparisons to the type strain, using 16S rRNA gene, gyrB, groEL, and recA sequence analyses, average nucleotide identity analysis, and MALDI-TOF mass spectrometry. Metagenomic analysis indicated that the genus Oceanivirga represented a significant component of the oral bacterial microbiomes of the dolphins and seals. However, sequences consistent with O. salmonicida were only found in the dolphin samples. Analyses of marine mammal microbiome studies in the NCBI databases showed sequences consistent with O. salmonicida from the common dolphin, striped dolphin, bottlenose dolphin Tursiops truncatus, humpback whale Megaptera novaeangliae, and harbour seal. Sequences from marine environmental studies in the NCBI databases showed no sequences consistent with O. salmonicida. The findings suggest that several species of marine mammals are natural hosts of O. salmonicida.

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