On the Gadus taxonomy: Ontogenetic evidence

Evseenko, S. A.; Laurel, Benjamin J.; Brown, Joseph A.; Malikova, D. Yu.

doi:10.1134/s0032945206050018

Cited by 8 publications

(7 citation statements)

References 9 publications

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“…If G. ogac is a synonym of G. macrocephalus, then marisalbi is also a synonym of G. macrocephalus. Differences in larval pigment patterns and egg chorion adhesiveness and smoothness observed in samples identified as G. macrocephalus, G. ogac, and G. morhua marisalbi (Evseenko et al 2006) appear not to be significant at the specific level.…”

Section: Gadidae (Cods)contrasting

confidence: 59%

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Biodiversity of arctic marine fishes: taxonomy and zoogeography

2010

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Taxonomic and distributional information on each fish species found in arctic marine waters is reviewed, and a list of families and species with commentary on distributional records is presented. The list incorporates results from examination of museum collections of arctic marine fishes dating back to the 1830s. It also incorporates results from DNA barcoding, used to complement morphological characters in evaluating problematic taxa and to assist in identification of specimens collected in recent expeditions. Barcoding results are depicted in a neighbor-joining tree of 880 CO1 (cytochrome c oxidase 1 gene) sequences distributed among 165 species from the arctic region and adjacent waters, and discussed in the family reviews. Using our definition of the arctic region, we count 242 species with documented presence, if 12 species that likely are synonyms are excluded. The 242 species are distributed among 45 families.Six families in Cottoidei with 72 species and five in Zoarcoidei with 55 species account for more than half (52.5%) the species. This study produced CO1 sequences for 106 of the 242 species. Sequence variability in the barcode region permits discrimination of all species. The average sequence variation within species was 0.3% (range 0-3.5%), while the average genetic distance between congeners was 4.7% (range 3.7-13.3%). The CO1 sequences support taxonomic separation of some species, such as Osmerus dentex and O. mordax and Liparis bathyarcticus and L. gibbus; and synonymy of others, like Myoxocephalus verrucosus in M. scorpius and Gymnelus knipowitschi in G. hemifasciatus. They sometimes revealed the presence of additional species that were not entirely expected, such as an unidentified species of Ammodytes in the western Gulf of Alaska, most likely A. personatus; and an unidentified Icelus species of the I. spatula complex with populations in the western Gulf of Alaska and the northern Bering and Chukchi Seas which could be a new species or a species in synonymy. Reviewing distribution, we found that for 24 species the patterns assigned by authors understated historical presence in the arctic region, and for 12 species they overstated presence. For instance, Hippoglossoides robustus is counted as an arctic-boreal species rather than predominantly boreal, and Artediellus uncinatus as predominantly arctic rather than predominantly boreal. Species with arctic, predominantly arctic, or arctic-boreal distributions composed 41% of the 242 species in the region, and predominantly boreal, boreal, and widely distributed species composed 59%. For some continental shelf species, such as the primarily amphiboreal Eumesogrammus praecisus and Leptoclinus maculatus, distributions appear to reflect changes, including reentry into Arctic seas and reestablishment of continuous ranges, that zoogeographers believe have been going on since the end of land bridge and glacial times. This article belongs to the special issue "Arctic Ocean Diversity Synthesis"Electronic supplementary material The online version of this arti...

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Section: Gadidae (Cods)contrasting

confidence: 59%

“…Gadus callarias marisalbi Derjugin, 1920 has been treated as a subspecies of G. morhua (e.g., Svetovidov 1948; Evseenko et al 2006) or a junior synonym of G. ogac (e.g., Renaud 1989;Cohen et al 1990;Mecklenburg et al 2002). If G. ogac is a synonym of G. macrocephalus, then marisalbi is also a synonym of G. macrocephalus.…”

Section: Gadidae (Cods)mentioning

confidence: 98%

Biodiversity of arctic marine fishes: taxonomy and zoogeography

2010

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“…Thus, G. macrocephalus is not endemic to the Pacific but has a distribution extending from the western and eastern Pacific through the Bering, Chukchi, and Beaufort Seas across the Arctic to eastern Canada and Greenland. Differences in egg and larval pigmentation (Evseenko et al, 2006) correspond with subspecies and should not be taken to indicate distinct species. Similarly, differences in breeding tubercles on the scales are attributable to population-level differences.…”

Section: Advances and Remaining Problems In Determining The Biodiversmentioning

confidence: 99%

“…The classification of the righteye flounders, family Pleuronectidae, has been scrutinized and changes have been proposed in recent years by various authors (e.g., Sakamoto, 1984;Lindberg and Fedorov, 1993;Cooper and Chapleau, 1998;Orr and Matarese, 2000;Evseenko, 2004;Kartavtsev et al, 2007). Three of the changes involve Pacific Arctic flounders.…”

Section: Advances and Remaining Problems In Determining The Biodiversmentioning

confidence: 99%

Ichthyofaunal Baselines in the Pacific Arctic Region and RUSALCA Study Area

Mecklenburg¹,

Steinke²

2015

Oceanog

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“…Some authors consider the White Sea cod to be a subspecies, Gadus morhua marisalbi Derjugin 1920 (Svetovidov, ; Andriashev, ; Evseenko et al., ).…”

mentioning

confidence: 99%

New data on the longevity of coastal cod Gadus morhua Linnaeus, 1758 in the White Sea

et al. 2015

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Summary The cod, Gadus morhua, is a common and abundant demersal fish in the White Sea coastal zone. The published data on the maximum age of White Sea cod still requires additional documentation, because some authors have noted difficulties in age determination by otoliths of large specimens. To obtain accurate data on the longevity of this species in the White Sea, an image analysis of thin‐sections of otoliths was made for age estimation. Research surveys in the Chupa Inlet and adjacent waters of the Kandalaksha Bay were conducted in June to August from 2007 to 2013. The five largest specimens of a total of 3564 captured fish were selected for age determination. Age of these largest individuals ranged between 7 and 12 years, total length and weight varied from 60.2 to 77.0 cm and from 2.4 to 6.1 kg, respectively. According to the data, maximal White Sea cod longevity is greater than in previously published data, and demonstrates similar longevity to conspecifics from the Baltic and North seas, whereas its life cycle is much shorter than cod from the Northeast Arctic, Iceland, Greenland, Newfoundland and Labrador stocks.

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On the Gadus taxonomy: Ontogenetic evidence

Cited by 8 publications

References 9 publications

Biodiversity of arctic marine fishes: taxonomy and zoogeography

Biodiversity of arctic marine fishes: taxonomy and zoogeography

Ichthyofaunal Baselines in the Pacific Arctic Region and RUSALCA Study Area

New data on the longevity of coastal cod Gadus morhua Linnaeus, 1758 in the White Sea

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