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.

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

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.

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

Effects of stock-specific and environmental factors on the feeding migration of Atlantic salmon (Salmo salar) in the Baltic Sea

1999 ◽  
Vol 56 (5) ◽  
pp. 853-861 ◽  
Author(s):  
Irma Kallio-Nyberg ◽  
Heikki Peltonen ◽  
Hannu Rita
Keyword(s):  
Environmental Factors ◽  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Salar ◽  
Release Site ◽  
Migration Route ◽  
The Baltic Sea ◽  
Atlantic Salmon Salmo Salar ◽  
The Baltic ◽  
Feeding Grounds

Atlantic salmon (Salmo salar L.) stocks in the Baltic Sea are mainly exploited during their sea migration. The offshore fishery in the feeding grounds of these salmon permitted us to analyse the migrations of certain stocks on the basis of tag recovery data. Four salmon stocks from rivers draining into Bothnian Bay (25°E, 65.5°N) were selected for study. During 1984-1991, about 135 000 2-year-old hatchery-reared smolts were tagged and released. We applied logit models, with the site of recovery as a multicategory response variable, to analyse the distribution of tag recoveries in the Baltic Sea feeding grounds. The results showed the combined influence of stock, prey abundance, and smolt size on the spatial marine distribution of the salmon. Although stock-specific sea migration patterns were apparent, annual environmental factors had a stronger influence on the sea migration route of salmon than did the stock factor. The salmon released as small smolts (total length [Formula: see text] 17.0 cm) were more frequently caught farther from the release site than were those released as larger smolts (>17 cm). The abundance of suitable prey (age 0+ herring) in the year of smolt release was found to be a key factor influencing the migration distance. The salmon released in the years of strong herring recruitment in the Gulf of Bothnia had a higher probability to stay in the Bothnian Sea for feeding and not to migrate farther south.

Sign in / Sign up

Export Citation Format

Share Document