Meristic and morphometric identity of Baltic stocks of Atlantic salmon (Salmo salar)

1985 ◽  
Vol 63 (9) ◽  
pp. 2032-2037 ◽  
Author(s):  
Hugh R. MacCrimmon ◽  
Ross R. Claytor
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Geographic Origin ◽  
Southern Sweden ◽  
Morphometric Characters ◽  
North Central ◽  
Atlantic Salmon Salmo Salar ◽  
Morphometric Features ◽  
Maturation Stages ◽  
Morphological Differences

Juvenile representatives of seven river stocks of Baltic salmon, Salmo salar, in northern, north-central, central, and southern Sweden are examined to determine if meristic and morphometric characters can be used to identify regional and home river origins. Morphometric features (> 80% accuracy) provide a better means of identification of salmon stocks than do meristic features. Both methods are congruent in identifying cohesive somatic salmon stocks based on river and regional geographic origin. Examination of within-stock differences between immature and mature (precocious) parr shows meristic homogeneity but significant morphological dichotomy. These significant morphological differences, involving different character sets, do not alter the capability to discern regional and river stocks containing disparate maturation stages of parr.

Morphometric and meristic variability among North American Atlantic salmon (Salmo salar)

1988 ◽  
Vol 66 (2) ◽  
pp. 310-317 ◽  
Author(s):  
Ross R. Claytor ◽  
Hugh R. MacCrimmon
Keyword(s):  
New York ◽  
Atlantic Salmon ◽  
Malate Dehydrogenase ◽  
Salmo Salar ◽  
New York State ◽  
Stock Identification ◽  
Identification Problems ◽  
Morphometric Characters ◽  
Atlantic Salmon Salmo Salar ◽  
Meristic Variation

To investigate the morphometric and meristic variation of Atlantic salmon (Salmo salar) in North America, juveniles from 16 anadromous and 5 nonanadromous populations were collected from an area extending from Labrador to New York state. The findings from the analysis of these characters were supplemented by an examination of malate dehydrogenase variation on a subset of specimens from selected populations. Newfoundland – Labrador and Gaspé – Maritime populations were found to belong to distinct regional stocks. This conclusion was supported by the accuracy of the morphometric discriminant function and a discontinuity in Mdh-3,4(100) allele frequencies. The lack of a clinal relationship between morphometric characters, latitude, longitude, and number of degree-days above 7 °C also suggested a pattern of distinct regional stocks. Considerable overlap among populations was found for meristic characteristics, and these were considered unsuitable for stock identification purposes. While no somatic differences were found between anadromous and nonanadromous populations, there were significant differences in Mdh-3,4(100) frequencies. The congruence of morphometric and malate dehydrogenase characteristics in delineating regional stocks emphasizes the importance of a multiple character approach in solving stock identification problems.

Coupling genetic and otolith trace element analyses to identify river-born fish with hatchery pedigrees in stocked Atlantic salmon (Salmo salar) populations

2011 ◽  
Vol 68 (6) ◽  
pp. 977-987 ◽  
Author(s):  
Charles Perrier ◽  
Françoise Daverat ◽  
Guillaume Evanno ◽  
Christophe Pécheyran ◽  
Jean-Luc Bagliniere ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Trace Element ◽  
Salmo Salar ◽  
Inductively Coupled Plasma ◽  
Geographic Origin ◽  
Wild Populations ◽  
Inductively Coupled ◽  
Elemental Concentrations ◽  
Atlantic Salmon Salmo Salar ◽  
Hatchery Stock

This study combines otolith trace element and genetic analyses to explore the origin of individuals when hatchery-reared fish are released into wild populations. We sampled 90 juvenile Atlantic salmon ( Salmo salar ) in four rivers in Normandy (France) and in the hatchery stock. Individuals were analyzed at six microsatellite markers and their otolith elemental concentrations (14 elements) were measured using femto-second laser ablation inductively-coupled plasma mass spectrometry. Wild populations were genetically differentiated from the hatchery strain (FST ≈ 0.06). Significant differences in elemental concentrations were found among otoliths of juveniles from the four rivers and the hatchery, allowing the identification of their geographic origin (83%–100% correct assignment). Coupling genetic and trace element analyses on the same individuals provided formal evidence that hatchery-born juveniles released into the wild can migrate to the sea and return as adults to breed on natural spawning grounds. Their progeny have pure hatchery pedigrees but have otoliths typical of river-born juveniles, meaning that they can be mistaken for hatchery-raised juveniles if only genetic data are considered. The presence of hybrids also confirmed that individuals with hatchery pedigrees can breed with wild conspecifics.

scholarly journals Distribution by origin and sea age of Atlantic salmon (Salmo salar) in the sea around the Faroe Islands based on analysis of historical tag recoveries

2012 ◽  
Vol 69 (9) ◽  
pp. 1598-1608 ◽  
Author(s):  
Jan Arge Jacobsen ◽  
Lars P. Hansen ◽  
Vegar Bakkestuen ◽  
Rune Halvorsen ◽  
David G. Reddin ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Fishery Management ◽  
Geographic Origin ◽  
European Countries ◽  
Faroe Islands ◽  
Atlantic Salmon Salmo Salar ◽  
Northern European ◽  
Hydrographic Features ◽  
Salmon Fishery

Abstract Jacobsen, J. A., Hansen, L. P., Bakkestuen, V., Halvorsen, R., Reddin, D. G., White, J., Ó Maoiléidigh, N., Russell, I.C., Potter, E. C. E., Fowler, M., Smith, G. W., Mork, K. A., Isaksson, A., Oskarsson, S., Karlsson, L., and Pedersen, S. 2012. Distribution by origin and sea age of Atlantic salmon (Salmo salar) in the sea around the Faroe Islands based on analysis of historical tag recoveries. – ICES Journal of Marine Science, 69: 1598–1608. A database of 2651 tags applied to Atlantic salmon (Salmo salar) smolts in 13 countries or jurisdictions and recovered in the Faroes longline salmon fishery from 1968 to 2000 was analysed for geographic distribution and origin of the salmon captured with respect to differences in sea age, season of the fishery, and hydrographic features in the Faroes area. The results indicated that salmon were not distributed randomly in the Faroes area by fishing season, sea age, or country of origin. The distribution of salmon in the Faroes zone partly depends on their geographic origin; salmon from countries in the northern European stock complex were distributed significantly farther northeast than those from countries in the southern European stock complex. Furthermore, the proportion of tag recoveries from southern European countries was higher in autumn, and the proportion recovered from northern European countries higher in winter. The apparent temporal and spatial segregation of stocks of different origin suggests that there may have been differential exploitation on these stocks, which provides information that could inform fishery management with regard to temporal and/or spatial fishery options for the Faroes commercial salmon fishery should it recommence in future.

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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