Features of the Biology of Mass Fish Species in Russian Waters of the Chukchi Sea. 1. Commercial Fish Biomass. Family Gadidae

Datsky, A. V.; Vedishcheva, E. V.; Trofimova, A. O.

doi:10.1134/s0032945222040051

Cited by 4 publications

(2 citation statements)

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“…While the last NMFS beam trawl survey in the Chukchi Sea occurred in 2019, the most recent Chukchi Sea NMFS otter trawl survey occurred in 2012. Within the same range of time (i.e., the last ten years), there have been significant poleward shifts in the distributions of many subarctic taxa common to the Bering Sea (Kotwicki and Lauth, 2013 2019; Maznikova et al, 2023a) but previously seldom observed in the Chukchi Sea, including many Bering Sea gadids like walleye pollock (Datsky et al, 2022;Wildes et al, 2022). With continued sampling of the region, the design of a STRS survey could be easily modified to reflect the species distributions observed in more recent years.…”

Section: Discussionmentioning

confidence: 99%

“…Bottom trawl surveying of groundfish and benthic invertebrates has been conducted by the National Marine Fisheries Service (NMFS) and its predecessor, the Bureau of Commercial Fisheries, sporadically since the 1950s. Increased monitoring of the Chukchi Sea is likely, given the poleward expansion of many Bering Sea species like walleye pollock, Pacific cod, and various flatfishes into the northern Bering Sea (Stevenson and Lauth, 2019;Spies et al, 2020) and further into the Chukchi Sea (Datsky et al, 2022;Cooper et al, 2023;Levine et al, 2023;Maznikova et al, 2023b) in recent anomalously warm years.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating potential changes to the US Chukchi Sea bottom trawl survey design via simulation testing

et al. 2023

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The US Chukchi Sea consists of the waters off the northwest of Alaska and is a naturally dynamic ice-driven ecosystem. The impacts from climate change are affecting the Arctic marine ecosystem as well as the coastal communities that rely on healthy marine ecosystems. In anticipation of increased ecosystem monitoring in the area, there is an opportunity to evaluate improved sampling designs for future ecological monitoring of the Chukchi Sea, an area that is sampled less comprehensively compared to other regions in Alaska. This analysis focused on standardized NOAA-NMFS-AFSC bottom trawl surveys (otter and beam trawls) and three types of survey designs: simple random, stratified random, and systematic. First, spatiotemporal distributions for 18 representative demersal fish and invertebrate taxa were fitted using standardized catch and effort data. We then simulated spatiotemporal taxon densities to replicate the three survey design types to evaluate design-based estimates of abundance and precision across a range of sampling effort. Modest increases in precision were gained from stratifying the design when compared to a simple random design with either similar or lower uncertainty and bias of the precision estimates. There were often strong tradeoffs between the precision and bias of the systematic estimates of abundance (and associated variance) across species and gear type. The stratified random design provided the most consistent, reliable, and precise estimates of abundance indices and is likely to be the most robust to changes in the survey design. This analysis provides a template for changing bottom trawl survey designs in the Chukchi Sea and potentially other survey regions in Alaska going forward and will be important when integrating new survey objectives that are more ecosystem-focused.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating potential changes to the US Chukchi Sea bottom trawl survey design via simulation testing

et al. 2023

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Features of the Biology of Mass Fish Species in Russian Waters of the Chukchi Sea 3. Families Clupeidae (Herrings), Osmeridae (Smelts), and Salmonidae (Salmonids)

Datsky

Vedishcheva²

2022

J. Ichthyol.

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Chukchi Sea — new walleye pollock fishing area

Datsky

Sheybak

Chikilev³

2022

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The purpose: to identification of the features of the distribution and biology of walleye pollock Gadus chalcogrammus, as well as the presentation of information on the stocks of the species and the initial stage of development of its resources in the western part of the Chukchi Sea.Methods used: to achieve this goal, we used materials from nine integrated trawl surveys carried out in 1995– 2020 on research vessels, as well as coastal studies on the Arctic coast of the Chukotka Autonomous Okrug, which analyzed data on the distribution, biology, biomass and fishery of walleye pollock.Novelty: elements of novelty are generalized modern materials on the distribution, biology and for the first time organized pollock fishery.Practical significance: the Chukchi Sea can be attributed to the most favorable areas for studying the variability of the organization of Arctic ecosystems, due to the instability of climatic conditions on Earth during the period of warming. The obtained results of studies on the distribution, biology, stocks and fishery of such a mass indicator species as walleye pollock will increase the efficiency of using the raw material base of marine fish in this reservoir.

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Features of the Biology of Mass Fish Species in Russian Waters of the Chukchi Sea. 1. Commercial Fish Biomass. Family Gadidae

Cited by 4 publications

References 40 publications

Evaluating potential changes to the US Chukchi Sea bottom trawl survey design via simulation testing

Evaluating potential changes to the US Chukchi Sea bottom trawl survey design via simulation testing

Features of the Biology of Mass Fish Species in Russian Waters of the Chukchi Sea 3. Families Clupeidae (Herrings), Osmeridae (Smelts), and Salmonidae (Salmonids)

Chukchi Sea — new walleye pollock fishing area

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