Working Group on Baltic International Fish Survey (WGBIFS)

Amosova, Viktoriia; Degel, Henrik; Fedotova, Elena; Fernández, R.; Haase, Stefanie; Karpushevskaia, Anastasiia; Larson, Niklas; Lilja, Juha; Lövgren, Olof; O’Malley, M.; Parner, Hjalte; Plikshs, Maris; Pönni, Jukka; Radtke, Krzysztof; Raid, Tiit; Rodriguez-Tress, Paco; Schmidt, Beata; Sepp, Elor; Severin, Vladimir; Kaljuste, Olavi

doi:10.17895/ices.pub.7679

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the highly valued autumn spawners were fully exhausted in the early 20th century, only then did the herring fishery turn to targeting spring spawners, the smaller, less-valued population. And finally, GSS, long disregarded as a potential commercial target, is now facing the pressures of industrial fishing ( 78 – 80 ).…”

Section: Discussionmentioning

confidence: 99%

Population dynamics of Baltic herring since the Viking Age revealed by ancient DNA and genomics

Atmore

Martínez-García

Makowiecki

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The world’s oceans are currently facing major stressors in the form of overexploitation and anthropogenic climate change. The Baltic Sea was home to the first “industrial” fishery ∼800 y ago targeting the Baltic herring, a species that is still economically and culturally important today. Yet, the early origins of marine industries and the long-term ecological consequences of historical and contemporary fisheries remain debated. Here, we study long-term population dynamics of Baltic herring to evaluate the past impacts of humans on the marine environment. We combine modern whole-genome data with ancient DNA (aDNA) to identify the earliest-known long-distance herring trade in the region, illustrating that extensive fish trade began during the Viking Age. We further resolve population structure within the Baltic and observe demographic independence for four local herring stocks over at least 200 generations. It has been suggested that overfishing at Øresund in the 16th century resulted in a demographic shift from autumn-spawning to spring-spawning herring dominance in the Baltic. We show that while the Øresund fishery had a negative impact on the western Baltic herring stock, the demographic shift to spring-spawning dominance did not occur until the 20th century. Instead, demographic reconstructions reveal population trajectories consistent with expected impacts of environmental change and historical reports on shifting fishing targets over time. This study illustrates the joint impact of climate change and human exploitation on marine species as well as the role historical ecology can play in conservation and management policies.

show abstract

Section: Discussionmentioning

confidence: 99%

Population dynamics of Baltic herring since the Viking Age revealed by ancient DNA and genomics

Atmore

Martínez-García

Makowiecki

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…The gulf spring spawning herring are the last remaining healthy herring stocks in the Baltic 79,69 . They are also the stock most adapted to the brackish conditions which are expected to increase in the Baltic into the future.…”

Section: Discussionmentioning

confidence: 99%

“…After the highly-valued autumn spawners were fully exhausted in the early 20 th century, only then did the herring fishery turn to targeting spring spawners, the smaller, less-valued population. And finally, the gulf spring spawners, long disregarded as potential commercial targets, are now facing the pressures of industrial fishing [68][69][70] .…”

Section: Human Impacts On the Baltic Herringmentioning

confidence: 99%

See 1 more Smart Citation

Serial depletion of Baltic herring since the Viking Age revealed by ancient DNA and population genomics

Atmore

Martínez-García

Makowiecki

et al. 2022

Preprint

View full text Add to dashboard Cite

Marine resource consumption has been a key component in European diet and culture since the Middle Ages, when fish consumption increased dramatically. Yet, the early origins of marine industries and the long-term ecological consequences of historical and contemporary fisheries remain debated. The Baltic Sea was home to the first “industrial” fishery ∼800 years ago targeting the Baltic herring, a species that is still economically and culturally important today. We combine modern whole genome data with ancient DNA (aDNA) to identify the first known long-distance herring trade in the region, illustrating that large-scale fish trade began during the Viking Age. We resolve population structure within the Baltic and observe demographic independence for four local herring stocks over at least 200 generations. It has been suggested that overfishing at Øresund in the 16th century resulted in a demographic shift from autumn-spawning to spring-spawning herring dominance in the Baltic. We show that while the Øresund fishery had a negative impact on the western Baltic herring stock, the existence of autumn-spawning refugia in other regions of the Baltic delayed the demographic shift to spring spawning dominance until the 20th century. Importantly, modelling demographic trajectories over time, we identify a consistent pattern of serial depletion within the Baltic that is associated with changes in fishing pressure and climate, and conclude that herring exploitation at both historical and recent intensities is not sustainable. Our results highlight the complex and enduring impacts humans have had on the marine environment well before the industrial era.

show abstract

“…Further work is however needed to establish the broader impacts on cod stocks. From 2021 it is obligatory during the Baltic Sea International Trawl Surveys (BITS) to, amongst length, weight, age etc., also monitor cod liver weight and visually assign a liver category, based on the number of nematodes visible on the liver surface, ( ICES, 2021 ). This only gives a rough estimate of C. osculatum , but it is a cost-effective method compared to digesting livers to count the number of C. osculatum .…”

Section: Discussionmentioning

confidence: 99%

The effects of Contracaecum osculatum larvae on the growth of Atlantic cod (Gadus morhua)

Ovegård

Ljungberg

Orio

et al. 2022

International Journal for Parasitology: Parasites and Wildlife

View full text Add to dashboard Cite

Working Group on Baltic International Fish Survey (WGBIFS)

Cited by 4 publications

References 0 publications

Population dynamics of Baltic herring since the Viking Age revealed by ancient DNA and genomics

Population dynamics of Baltic herring since the Viking Age revealed by ancient DNA and genomics

Serial depletion of Baltic herring since the Viking Age revealed by ancient DNA and population genomics

The effects of Contracaecum osculatum larvae on the growth of Atlantic cod (Gadus morhua)

Contact Info

Product

Resources

About