No indications of Atlantic salmon (Salmo salar) shoaling with kin in the Baltic Sea

2008 ◽  
Vol 65 (8) ◽  
pp. 1738-1748 ◽  
Author(s):  
Stefan Palm ◽  
Johan Dannewitz ◽  
Torbjörn Järvi ◽  
Marja-Liisa Koljonen ◽  
Tore Prestegaard ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Genetic Relatedness ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
Related Individuals ◽  
The Baltic ◽  
Mixed Stock ◽  
Mixed Stock Analyses

Several studies have shown that fish shoals may consist of closely related individuals. It has been found, for example, that released out-migrating salmon smolts tend to aggregate with kin, including when sibling groups have been reared separately. We used genetic microsatellite markers to test whether “shoals” of adult Atlantic salmon ( Salmo salar ) during the marine phase (i.e., aggregations of fish caught in drift nets at offshore feeding areas in the Baltic Sea) consisted of closely related individuals (full-siblings, half-siblings). We found no evidence of kin cohesiveness related to shoals, however. Despite a weak overall tendency for individuals assigned to the same population (river or stock) to occur together, estimates of genetic relatedness in combination with consistent heterozygote deficiencies, and results from mixed-stock analyses and assignment tests collectively indicated that shoals consisted of unrelated fish from multiple populations.

scholarly journals Fatty acid signatures connect thiamine deficiency with the diet of the Atlantic salmon (Salmo salar) feeding in the Baltic Sea

2018 ◽  
Vol 165 (10) ◽  
Author(s):  
Marja Keinänen ◽  
Reijo Käkelä ◽  
Tiina Ritvanen ◽  
Jukka Pönni ◽  
Hannu Harjunpää ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Thiamine Deficiency ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic

scholarly journals A multi‐biomarker study on Atlantic salmon ( Salmo salar L.) affected by the emerging Red Skin Disease in the Baltic Sea

2020 ◽  
Author(s):  
Fabian G. Weichert ◽  
Charlotte Axén ◽  
Lars Förlin ◽  
Pedro A. Inostroza ◽  
Ulrike Kammann ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Skin Disease ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic

Matrilinear phylogeography of Atlantic salmon (Salmo salar L.) in Europe and postglacial colonization of the Baltic Sea area

2001 ◽  
Vol 10 (1) ◽  
pp. 89-102 ◽  
Author(s):  
J. Nilsson ◽  
R. Gross ◽  
T. Asplund ◽  
O. Dove ◽  
H. Jansson ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
The Baltic Sea ◽  
Postglacial Colonization ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic ◽  
Sea Area

scholarly journals Relationships between fish stock changes in the Baltic Sea and the M74 syndrome, a reproductive disorder of Atlantic salmon (Salmo salar)

2011 ◽  
Vol 68 (10) ◽  
pp. 2134-2144 ◽  
Author(s):  
Jaakko Mikkonen ◽  
Marja Keinänen ◽  
Michele Casini ◽  
Jukka Pönni ◽  
Pekka J. Vuorinen
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Gadus Morhua ◽  
Clupea Harengus ◽  
Fish Stock ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
Reproductive Disorder ◽  
The Baltic

Abstract Mikkonen, J., Keinänen, M., Casini, M., Pönni, J., and Vuorinen, P. J. 2011. Relationships between fish stock changes in the Baltic Sea and the M74 syndrome, a reproductive disorder of Atlantic salmon (Salmo salar). – ICES Journal of Marine Science, 68: 2134–2144. The M74 syndrome of Baltic salmon (Salmo salar), which appears as increased yolk-sac fry mortality (YSFM), impairs the reproduction of salmon stocks. Changes in the prey stocks of Baltic salmon in its two feeding areas, the southern Baltic Proper (BPr), where sprat (Sprattus sprattus) was the main prey species during the high incidence of M74, and the Bothnian Sea, where herring (Clupea harengus) is the dominant species, were analysed in relation to salmon growth and size and in relation to the incidence of M74. The high condition factor (CF > 1.05) of prespawning salmon predicted high YSFM. From the various stock factors of sprat and herring in the southern BPr, the biomass of sprat had the strongest positive relationships with the CF of prespawning salmon, and the total prey biomass with YSFM. It is concluded that the ample but unbalanced food resources for salmon in the BPr, primarily sprat, induce M74. By reducing the fishing pressure on cod (Gadus morhua) and by more effectively managing the sprat fishery in years when the cod stock is weak, the incidence of the M74 syndrome could be reduced and even prevented.

Distinguishing between resident and migrating Atlantic salmon (Salmo salar) stocks by genetic stock composition analysis

1995 ◽  
Vol 52 (4) ◽  
pp. 665-674 ◽  
Author(s):  
Marja-Liisa Koljonen
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Composition Analysis ◽  
The Baltic Sea ◽  
Genetic Stock ◽  
Atlantic Salmon Salmo Salar ◽  
Genetic Stock Identification ◽  
The Baltic ◽  
Catch Composition ◽  
Mixed Stock

The possibility of using the genetic stock identification (GSI) method to distinguish between individual Atlantic salmon (Salmo salar) stocks and stock groups in Finnish catches was studied. In the Baltic Sea, the Atlantic salmon is a target of a mixed-stock fishery, and information about stock composition would be valuable for the management of the species. The salmon catches on the Finnish west coast consist of two seasonally variable components: a group of northern stocks migrating through the area to the Baltic main basin and the resident Neva salmon. The migratory component includes two endangered wild stocks (Tornionjoki and Simojoki). The allele frequency differences at four polymorphic loci among the stocks allowed reliable catch composition estimates to be made of the migratory and resident components; one stock (Oulujoki) from the northern group could also be identified with reasonable accuracy. Northern migrating stocks accounted for over half the catches at the time of this study. The estimate of natural (nonhatchery) stocks was very low (3% in total).

scholarly journals Annual changes in the proportions of wild and hatchery Atlantic salmon (Salmo salar) caught in the Baltic Sea

2006 ◽  
Vol 63 (7) ◽  
pp. 1274-1285 ◽  
Author(s):  
Marja-Liisa Koljonen
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Wild Fish ◽  
Gulf Of Finland ◽  
Substantial Contribution ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic ◽  
The Gulf Of Finland

Abstract DNA-level information from an eight-loci microsatellite baseline database of 32 Atlantic salmon (Salmo salar) stocks was used with a Bayesian estimation method to assess the stock and stock group proportions of Finnish salmon catches in the Baltic Sea area. The proportions of seven stock groups, important to fisheries management, were assessed in catch samples taken between 2000 and 2005. In the Gulf of Bothnia area, the proportion of wild fish in catches showed an increasing trend in all areas until 2003, mainly because of the decrease in total catches caused by the relatively greater mortality of hatchery-reared fish compared with wild fish. In 2004, the total number of wild fish caught had also increased, indicating an increase in the abundance of wild stocks. In catches from the Åland Sea, the proportion of wild fish increased from 44% in 2000 to 70% in 2004, while the catch during the same period increased from 4628 to 7329 fish. In the Gulf of Finland, the local Neva salmon stock, which is released by Estonia, Finland, and Russia, made the largest contribution. In the western part of the Gulf of Finland, fish originating in the Baltic Main Basin also made a substantial contribution to catches. The threatened eastern Estonian and Russian wild stocks were recorded only in the western part of the Gulf of Finland, where the proportion of wild fish increased from 9% in 2003 to 19% in 2004.

Phylogeographic lineages and differentiation pattern of Atlantic salmon (Salmo salar) in the Baltic Sea with management implications

1999 ◽  
Vol 56 (10) ◽  
pp. 1766-1780 ◽  
Author(s):  
Marja-Liisa Koljonen ◽  
Håkan Jansson ◽  
Tiit Paaver ◽  
Oleg Vasin ◽  
Jarmo Koskiniemi
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Isolation By Distance ◽  
Conservation Strategy ◽  
The Baltic Sea ◽  
Genetic Management ◽  
Atlantic Salmon Salmo Salar ◽  
Starting Point ◽  
The Baltic

The genetic structure and isolation pattern of the Atlantic salmon (Salmo salar) throughout its range in the Baltic Sea were examined as a starting point for a conservation strategy for the species in this area. The allozyme variation in seven polymorphic loci was studied in 5125 salmon from 24 rivers in four countries. A clear dichotomy was observed between stock groups from southeastern (Russia, Estonia, Latvia, southern Sweden) and northwestern (northern Finland, northern Sweden) drainage regions, corresponding to the postglacial colonisation of the Baltic Sea by two phylogeographic lineages, one from the east (the Ice Lake lineage) and one from the west (the Atlantic lineage). The geographical and genetic distances between stocks fit the one-dimensional "isolation-by-distance" model (p < 0.001). The estimated gene flow ranged from 0 to10 migrants per generation. The total diversity of hatchery stocks was 72% of that of the wild stocks. Genetically similar stock groups, phylogeographic lineages, and drainage regions are recommended for use as genetic management units in addition to stock level.

scholarly journals Population and size‐specific distribution of Atlantic salmon Salmo salar in the Baltic Sea over five decades

2019 ◽  
Vol 96 (2) ◽  
pp. 408-417
Author(s):  
Philip Jacobson ◽  
Anna Gårdmark ◽  
Magnus Huss
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
Specific Distribution ◽  
The Baltic

Analysis of gene associated tandem repeat markers in Atlantic salmon (Salmo salar L.) populations: implications for restoration and conservation in the Baltic Sea

2005 ◽  
Vol 6 (3) ◽  
pp. 385-397 ◽  
Author(s):  
Anti Vasemägi ◽  
Riho Gross ◽  
Tiit Paaver ◽  
Marja-Liisa Koljonen ◽  
Marjatta Säisä ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Tandem Repeat ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic

Organohalogen concentrations and feeding status in Atlantic salmon (Salmo salar L.) of the Baltic Sea during the spawning run

2014 ◽  
Vol 468-469 ◽  
pp. 449-456 ◽  
Author(s):  
Pekka J. Vuorinen ◽  
Hannu Kiviranta ◽  
Jaana Koistinen ◽  
Outi Pöyhönen ◽  
Erkki Ikonen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
Spawning Run ◽  
The Baltic
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