The Status and Exploitation of Sea Trout on the Finnish Coast of the Gulf of Bothnia in the Baltic Sea

Jutila, Eero; Saura, Ari; Kallio‐Nyberg, Irma; Huhmarniemi, Alpo; Romakkaniemi, Atso

doi:10.1002/9780470996027.ch10

Cited by 8 publications

(18 citation statements)

References 6 publications

(6 reference statements)

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“…Milner et al (2006) underscored the importance of gaining a better understanding of genetic and ecologic stock structure, spawning distribution and population dispersal on the catchment scale, for the management and conservation of sea trout. In the Gulf of Bothnia, concern has been raised regarding negative effects of fisheries, habitat degradation, and water flow regulations on wild sea trout stocks (ICES 2006;Jutila et al 2006;Lundqvist et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Importance of life‐history and landscape characteristics for genetic structure and genetic diversity of brown trout (Salmo truttaL.)

Nilsson

2011

Ecology of Freshwater Fish

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Investigating the influence of evolutionary forces on the genetic structure and genetic diversity remains a major challenge. Yet, it is of considerable interest for conservation and management of a species. This study investigates the influence of life-history and landscape features, such as altitude, connectivity and habitat size, on genetic diversity and genetic structure of brown trout (Salmo trutta L.) with stream-resident, lake-dwelling and seamigrating life-history in two river systems in northern Sweden. Using regression tree analysis including ecological and landscape characteristics, we show that life history is the most important variable explaining genetic diversity and population differentiation. Sea-migrating populations show high diversity and low differentiation, and lake-and stream-resident populations show low diversity and high population differentiation, among all samples. No overall genetic correlation with geographical distance was noted; however, among sea-migrating populations within the River Vindelälven drainage, this pattern was observed. This study illustrates that life-history and landscape features help to explain genetic structure and genetic variation. The information is important for conservation and management actions, such as fisheries regulations, habitat restorations, stocking of hatchery fish, defining management units and introducing genetic monitoring programmes.

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Section: Introductionmentioning

confidence: 99%

Importance of life‐history and landscape characteristics for genetic structure and genetic diversity of brown trout (Salmo truttaL.)

Nilsson

2011

Ecology of Freshwater Fish

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“…Unpredictable and unfavourable environmental conditions at the stocking sites and in the streams (a dry spring and water regulation in river A in 2002) partly explain the low recapture rate. In Finland, migratory trout are mainly caught in the sea by gill nets, and the majority of them before their third sea year and before they attain the minimum biological size for reproduction (total length ≥65 cm) (Kallio-Nyberg et al, 2002Jutila et al, 2006). Not only in this experiment, but in nearly all tagging experiments in the Gulf of Bothnia the recapture rate of sea trout has been low (2-6%) since the early 1990s (Jutila et al, 2006).…”

Section: Recapture and Fisherymentioning

confidence: 95%

“…These stockings have mainly increased the fishing effort targeted at feeding trout in the sea, but not notably the number of spawners in their own home rivers or other rivers. The migratory trout have rarely been able to attain a reproductive age and size (about 65 cm for females) before being caught, because trout fishing is very extensive in the sea, and the majority of sea trout are caught in their first or second sea year at a size of only 30-50 cm (Saura, 2001;Jutila et al, 2006;Kallio-Nyberg et al, 2007). In addition, the conditions in many coastal rivers are not adequate for thriving anadromous populations.…”

Section: From Sea Ranching To New Natural Stocksmentioning

confidence: 97%

“…In addition, the conditions in many coastal rivers are not adequate for thriving anadromous populations. For example, barriers may prevent upstream migration, the quality of water may be impaired by abundant nutrient and sediment loading or the nursery areas may be partly destroyed due to dredging carried out for log driving and flood prevention (Jutila et al, 1998(Jutila et al, , 2006. Current attempts to regulate net fishing, repair spawning areas and remove dams might offer new possibilities for migratory trout.…”

Section: From Sea Ranching To New Natural Stocksmentioning

confidence: 98%

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Can the lost migratory Salmo trutta stocks be compensated with resident trout stocks in coastal rivers?

Kallio‐Nyberg¹,

Jutila²,

Koljonen³

et al. 2010

Fisheries Research

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“…The reasons for this include the regulation of the large rivers, over‐exploitation, habitat destruction, acidification and inaccessibility of the freshwater habitat due to hydropower development (Jutila et al . ; ICES ; Dagerman et al . ).…”

Section: Introductionmentioning

confidence: 99%

Genetic differentiation of southeast Baltic populations of sea trout inferred from single nucleotide polymorphisms

et al. 2013

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Sea trout (Salmo trutta m. trutta) is a migratory form of brown trout common in the Baltic Sea. Nine populations from the southeast Baltic (Poland; Lithuania; Denmark, Bornholm; Estonia and Russia) were genotyped using iPLEX Gold technology (Sequenom) with 62 informative SNPs. A diagnostic panel of 23 SNPs was applied to estimate genetic differentiation and assess the population structure of Baltic sea trout. The highest level of pairwise FST differences was observed between the Russian (East Gulf of Finland) and Polish (Baltic main basin) populations. The lowest differences were between the two Polish and the Polish and Lithuanian populations. A genetic similarity was noted between the Estonian Riguldi River and Danish Bornholm populations, and this finding was supported by a Bayesian and factorial correspondence analysis. Diversity within populations was highest for populations from Estonia and lowest for the Lithuanian population. Genetic structure analysis indicated that individuals from the nine populations were clustered into four groups.

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The Status and Exploitation of Sea Trout on the Finnish Coast of the Gulf of Bothnia in the Baltic Sea

Cited by 8 publications

References 6 publications

Importance of life‐history and landscape characteristics for genetic structure and genetic diversity of brown trout (Salmo truttaL.)

Importance of life‐history and landscape characteristics for genetic structure and genetic diversity of brown trout (Salmo truttaL.)

Can the lost migratory Salmo trutta stocks be compensated with resident trout stocks in coastal rivers?

Genetic differentiation of southeast Baltic populations of sea trout inferred from single nucleotide polymorphisms

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