Distinction of saffron cod (Eleginus gracilis) from several other gadid species by using microsatellite markers

Sme, Noel; Lyon, Sarah; Canino, Michael F.; Чернова, Н. В.; O’Bryhim, Jason R.; Lance, Stacey L.; Jones, Keithly G.; Mueter, Franz J.; Gharrett, Anthony J.

doi:10.7755/fb.116.1.6

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…The circumstance surrounding this saffron cod increase were distinct from our Beaufort Sea example because it was restricted to juveniles (<220 mm), no obvious climate driver, and was strongly tied to the eelgrass Zostera marina habitat (Johnson et al, 2009). Saffron cod in the Gulf of Alaska are genetically distinct from those in the Arctic and it is possible that they are a different species (Sme et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Borealization of nearshore fishes on an interior Arctic shelf over multiple decades

Biela

Laske

Stanek

et al. 2023

Global Change Biology

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Borealization is a type of community reorganization where Arctic specialists are replaced by species with more boreal distributions in response to climatic warming. The process of borealization is often exemplified by the northward range expansions and subsequent proliferation of boreal species on the Pacific and Atlantic inflow Arctic shelves (i.e., Bering/Chukchi and Barents seas, respectively). But the circumpolar nearshore distribution of Arctic-boreal fishes that predates recent warming suggests borealization is possible beyond inflow shelves. To examine this question, we revisited two nearshore lagoons in the eastern Alaska Beaufort Sea (Kaktovik and Jago lagoons, Arctic National Wildlife Refuge, Alaska, USA), a High Arctic interior shelf. We compared summer fish species assemblage, catch rate, and size distribution among three periods that spanned a 30-year record (baseline conditions, 1988-1991; moderate sea ice decline, 2003-2005; rapid sea ice decline, 2017-2019). Fish assemblages differed among periods in both lagoons, consistent with borealization.Among Arctic specialists, a clear decline in fourhorn sculpin (Myoxocephalus quadricornis, Kanayuq in Iñupiaq) occurred in both lagoons with 86%-90% lower catch rates compared with the baseline period. Among the Arctic-boreal species, a dramatic 18to 19-fold increase in saffron cod (Eleginus gracilis, Uugaq) occurred in both lagoons.Fish size (length) distributions demonstrated increases in the proportion of larger fish for most species examined, consistent with increasing survival and addition of ageclasses. These field data illustrate borealization of an Arctic nearshore fish community during a period of rapid warming. Our results agree with predictions that Arctic-boreal fishes (e.g., saffron cod) are well positioned to exploit the changing Arctic ecosystem.Another Arctic-boreal species, Dolly Varden (Salvelinus malma, Iqalukpik), appear to have already responded to warming by shifting from Arctic nearshore to shelf waters. More broadly, our findings suggest that areas of borealization could be widespread in the circumpolar nearshore.

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Section: Discussionmentioning

confidence: 99%

Borealization of nearshore fishes on an interior Arctic shelf over multiple decades

Biela

Laske

Stanek

et al. 2023

Global Change Biology

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“…The collections were made less than 65 km from each other (Table 1). Tissue samples were placed in a DNA preservative (Seutin et al 1991) and sent to the University of Alaska Fairbanks laboratory where they were stored at -20° C. Isolation of DNA and microsatellite ampli cation and analysis were conducted as described in Smé et al (2017) for eight tetra-nucleotide microsatellite loci: Elgr07, Elgr11, Elgr13, Elgr14, Elgr23, Elgr31, Elgr44, and Elgr45.…”

Section: Collectionsmentioning

confidence: 99%

Demography of a nearshore gadid navaga, Eleginus nawaga, from the Barents Sea coast during the last glacial period

et al. 2023

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Recent glaciations in northwestern Russia completely covered the Barents Sea during four glacial advances. At the peaks of those glacial advances, there were no nearshore macrofauna. Consequently, colonization by species that now inhabit present-day nearshore waters must have occurred since the habitat became available and hospitable, less than 15 ka. We analyzed microsatellite data from Eleginus nawaga (Gadiformes: Gadidae) collected from Khaipudyrskaya Bay in the southeastern Barents Sea with coalescent-based models to estimate the times and effective population sizes that existed before and after major historical demographic changes. Colonization of E. nawaga, which could only follow establishment of a lower trophic-level food web, provides an indicator of the for that timing. The results of the analyses were consistent with two major demographic events. After an initial founding event from a small number of individuals before ~ 140 ka, the population grew to an effective size of about 2700 individuals. Subsequently, probably as the ice receded after the Last Glacial Maximum, it plateaued at ~ 26,000 about 3000 years ago. Colonization likely came from eastern populations following the Saalian Period, after which there was little nearshore ice to the East of the Kara Sea.

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Examination of saffron cod Eleginus gracilis (Tilesius 1810) population genetic structure

et al. 2020

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Distinction of saffron cod (Eleginus gracilis) from several other gadid species by using microsatellite markers

Cited by 8 publications

References 8 publications

Borealization of nearshore fishes on an interior Arctic shelf over multiple decades

Borealization of nearshore fishes on an interior Arctic shelf over multiple decades

Demography of a nearshore gadid navaga, Eleginus nawaga, from the Barents Sea coast during the last glacial period

Examination of saffron cod Eleginus gracilis (Tilesius 1810) population genetic structure

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