Commercial fish and shellfish in the Barents Sea: Have introduced crab species affected the population trajectories of commercial fish?

Dvoretsky, Alexander G.; Dvoretsky, Vladimir G.

doi:10.1007/s11160-015-9382-1

Cited by 56 publications

(38 citation statements)

References 39 publications

(65 reference statements)

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“…In recent years some studies from both sides of the border have found either negligible impacts or evidence indicating that the impacts are not as detrimental as previously believed (Oug et al, 2017;Dvoretsky and Dvoretsky, 2015). These results suggest that applying a high fishing mortality for the purposes of controlling the population of the invasion may no longer be the preferred policy.…”

Section: Overview Of Research On the Red King Crab Invasion In The Bamentioning

confidence: 90%

Research agendas for profitable invasive species

Kourantidou

Kaiser

2018

Journal of Environmental Economics and Policy

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Applied economics often relies on research findings from other fields. With absent, inconclusive or contradictory findings, economics must interpret the uncertainty and ground any policy recommendations in this context. Understanding biases in the primary research agendas can assist in improving policy. Research and management are considered part of the production chain needed to manage the sustainable output of the ecosystem. We identify how economic incentives may systematically vary across research interests that feed into policy decisions over natural resource management of a simultaneously profitable and invasive species. We empirically test how this variation in incentives might affect research agendas and their findings for the case of the ongoing Red King Crab invasion in the Barents Sea. We find that research agendas may shift over time in response to shifts in the relative trade-offs between the financial resource benefit and the ecological consequences of the invasion as it progresses from introduction to establishment. Scientific consensus may be more difficult to achieve even for primary research when economic incentives differ across participating researchers.

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Section: Overview Of Research On the Red King Crab Invasion In The Bamentioning

confidence: 90%

Research agendas for profitable invasive species

Kourantidou

Kaiser

2018

Journal of Environmental Economics and Policy

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“…Given that no prey selectivity was apparent in the southern Chukchi Sea (where statistically tested), the present population of snow crabs seems to impact benthic prey fields equally. Should strong range shifts of large (> 80 mm CW) crabs or substantial increases of snow crab populations occur in the southern Chukchi Sea as some evidence suggests (Feder et al 2005, Mueter and Litzow 2008, Bluhm et al 2009, they would likely exert increased top down pressure and have the potential to restructure benthic food webs (e.g., Falk-Petersen et al 2011, Dvoretsky andDvoretsky 2015). Thus, continued monitoring of snow crab life history and population dynamics in the Pacific Arctic region is essential to detect future potential increases in snow crab abundances that may impact the benthic prey communities, and subsequently benthic food web structure.…”

Section: Discussionmentioning

confidence: 99%

Diet analysis of Alaska Arctic snow crabs (Chionoecetes opilio) using stomach contents and δ13C and δ15N stable isotopes

Divine

Bluhm

Mueter

et al. 2017

Deep Sea Research Part II: Topical Studies in Oceanography

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We used stomach content and stable δ 13 C and δ 15 N isotope analyses to investigate male and female snow crab diets over a range of body sizes (30-130 mm carapace width) in five regions of the Pacific Arctic (southern and northern Chukchi Sea, western, central, and Canadian Beaufort Sea). Snow crab stomach contents from the southern Chukchi Sea were also compared to available prey biomass and abundance. Snow crabs consumed four main prey taxa: polychaetes, decapod crustaceans (crabs, amphipods), echinoderms (mainly ophiuroids), and mollusks (bivalves, gastropods). Both approaches revealed regional differences. Crab diets in the two Chukchi regions were similar to those in the western Beaufort (highest bivalve, amphipod, and crustacean consumption). The Canadian Beaufort region was most unique in prey composition and in stable isotope values. We also observed a trend of decreasing carbon stable isotopes in crabs from the Chukchi to those in the Canadian Beaufort, likely reflecting the increasing use of terrestrial carbon sources towards the eastern regions of the Beaufort Sea from Mackenzie River influx. Cannibalism on snow crabs was higher in the Chukchi regions relative to the Beaufort regions. We suggest that cannibalism may have an impact on recruitment in the Chukchi Sea via reduction of cohort strength after settlement to the benthos, as known from the Canadian Atlantic. Prey composition varied with crab size only in some size classes in the southern Chukchi and central Beaufort, while stable isotope results showed no size-dependent differences. Slightly although significantly higher mean carbon isotope values for males in the

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“…For example, more than 166 NIS are reported from the Laurentian Great Lakes Basin (U.S. Geological Survey, 2017), and 67 NIS are known to be established in the Baltic Sea (Ojaveer et al, 2017). Although not all NIS are harmful, some of them have led to changes within recipient ecosystems, causing substantial impacts on ecology (Bax, Williamson, Aguero, Gonzalez, & Geeves, 2003;Dvoretsky, 2012Dvoretsky, , 2013a ; Salvaterra, Green, Crowe, & O'Gorman, 2013), economies (Dvoretsky, 2014;Dvoretsky & Dvoretsky, 2015, 2018Lodge et al, 2006;Streftaris & Zenetos, 2006), and/or animal health (Burek, Gulland, & O'Hara, 2008;Dvoretsky, 2013b;Ruiz et al, 2000). For example, the carpet sea squirt, Didemnum vexillum, presently occurs in many temperate regions (Lambert, 2009), has spread rapidly across Georges Bank in the Northwest Atlantic and along the European coasts, competing with native benthic species, altering community structure, and potentially negatively impacting fisheries (Lengyel, Collie, & Valentine, 2009;McKenzie et al, 2017;Valentine et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…). The Red King Crab was introduced into the Barents Sea in the 1960s to establish a commercial fishery(Dvoretsky & Dvoretsky, 2015). While horizon scanning may be applied to all taxa groups, special attention should be given to Arthropoda, Ochrophyta, and Chordata as they are the taxa with the greatest number of NIS in the Arctic.…”

mentioning

confidence: 99%

“…Horizon scanning has been used in Great Britain and the Netherlands, for example, to identify potential NIS which may have significant ecological impacts on the recipient environments for prioritizing management efforts(Matthews et al, 2017;Roy et al, 2014). While the introduction of the crab has brought economic benefits to Russia and Norway, there are concerns regarding its impacts on native communities, especially in Norwegian waters(Dvoretsky & Dvoretsky, 2015;Falk-Petersen, Renaud, & Anisimova, 2011;Oug, Cochrane, Sundet, Norling, & Nilsson 2011). Horizon scanning may also be used as a tool to screen NIS currently absent in certain Arctic LMEs, but present in neighboring regions or other regions that are connected via established pathways including shipping, aquaculture activities, live food trade, and wild fisheries.…”

mentioning

confidence: 99%

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Climate change opens new frontiers for marine species in the Arctic: Current trends and future invasion risks

Chan

Stanislawczyk

Sneekes

et al. 2018

Global Change Biology

147

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Climate change and increased anthropogenic activities are expected to elevate the potential of introducing nonindigenous species (NIS) into the Arctic. Yet, the knowledge base needed to identify gaps and priorities for NIS research and management is limited. Here, we reviewed primary introduction events to each ecoregion of the marine Arctic realm to identify temporal and spatial patterns, likely source regions of NIS, and the putative introduction pathways. We included 54 introduction events representing 34 unique NIS. The rate of NIS discovery ranged from zero to four species per year between 1960 and 2015. The Iceland Shelf had the greatest number of introduction events (n = 14), followed by the Barents Sea (n = 11), and the Norwegian Sea (n = 11). Sixteen of the 54 introduction records had no known origins. The majority of those with known source regions were attributed to the Northeast Atlantic and the Northwest Pacific, 19 and 14 records, respectively. Some introduction events were attributed to multiple possible pathways. For these introductions, vessels transferred the greatest number of aquatic NIS (39%) to the Arctic, followed by natural spread (30%) and aquaculture activities (25%). Similar trends were found for introductions attributed to a single pathway. The phyla Arthropoda and Ochrophyta had the highest number of recorded introduction events, with 19 and 12 records, respectively. Recommendations including vector management, horizon scanning, early detection, rapid response, and a pan‐Arctic biodiversity inventory are considered in this paper. Our study provides a comprehensive record of primary introductions of NIS for marine environments in the circumpolar Arctic and identifies knowledge gaps and opportunities for NIS research and management. Ecosystems worldwide will face dramatic changes in the coming decades due to global change. Our findings contribute to the knowledge base needed to address two aspects of global change—invasive species and climate change.

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Commercial fish and shellfish in the Barents Sea: Have introduced crab species affected the population trajectories of commercial fish?

Cited by 56 publications

References 39 publications

Research agendas for profitable invasive species

Research agendas for profitable invasive species

Diet analysis of Alaska Arctic snow crabs (Chionoecetes opilio) using stomach contents and δ13C and δ15N stable isotopes

Climate change opens new frontiers for marine species in the Arctic: Current trends and future invasion risks

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