Long‐distance movements of Antarctic toothfish ( Dissostichus mawsoni ) as inferred from tag‐recapture data

2021 ◽  
Author(s):  
Emily Grilly ◽  
Keith Reid ◽  
Stephane Thanassekos
Keyword(s):  
Long Distance ◽  
Antarctic Toothfish ◽  
Dissostichus Mawsoni

First in situ estimates of acoustic target strength of Antarctic toothfish (Dissostichus mawsoni)

2018 ◽  
Vol 206 ◽  
pp. 79-84 ◽  
Author(s):  
Richard L. O’Driscoll ◽  
Simonepietro Canese ◽  
Yoann Ladroit ◽  
Steve J. Parker ◽  
Laura Ghigliotti ◽  
...  
Keyword(s):  
Target Strength ◽  
Antarctic Toothfish ◽  
Dissostichus Mawsoni ◽  
Acoustic Target

scholarly journals Assembly of the antifreeze glycoprotein/trypsinogen-like protease genomic locus in the Antarctic toothfish Dissostichus mawsoni (Norman)

Genomics ◽  
2011 ◽  
Vol 98 (3) ◽  
pp. 194-201 ◽  
Author(s):  
Jessie Nicodemus-Johnson ◽  
Stephen Silic ◽  
Laura Ghigliotti ◽  
Eva Pisano ◽  
C.-H. Christina Cheng
Keyword(s):  
Antarctic Toothfish ◽  
Genomic Locus ◽  
Antifreeze Glycoprotein ◽  
Dissostichus Mawsoni ◽  
The Antarctic

scholarly journals Fatty Acid Composition of Antarctic Toothfish Dissostichus mawsoni

2012 ◽  
Vol 45 (6) ◽  
pp. 579-585 ◽  
Author(s):  
Chi-Won Lim ◽  
Hyun-Su Jo ◽  
InJa Yeon ◽  
KyuJin Seok ◽  
Seok-Gwan Choi ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Antarctic Toothfish ◽  
Dissostichus Mawsoni

scholarly journals Morphological dietary composition of Antarctic toothfish (Dissostichus mawsoni) along the East Antarctic continental slope

2021 ◽  
Author(s):  
Gi Chang Seong ◽  
Seok-Gwan Choi ◽  
Sangdeok Chung ◽  
Doo Hae An ◽  
Hyun-Woo Kim ◽  
...  
Keyword(s):  
Continental Slope ◽  
Morphological Analysis ◽  
Stomach Contents ◽  
Dietary Composition ◽  
Ecosystem Structure ◽  
Antarctic Toothfish ◽  
Dissostichus Mawsoni ◽  
Index Of Relative Importance ◽  
And Function ◽  
Ecosystem Structure And Function

Abstract To predict how the fishing of Antarctic toothfish, Dissostichus mawsoni , would affect the ecosystem, it is necessary to understand the species’ ecological niche. Morphological analysis of the stomach contents of 960 D . mawsoni specimens collected at depths of 946–1,600 m along the East Antarctic continental slope from December 2016 to March 2017 was used to assess dietary composition according to depth, sex, site, and size. Fishes were the most common prey item for D . mawsoni , comprising 97.8% based on the index of relative importance. Among the nine fish families consumed by D . mawsoni , Macrouridae was the dominant taxon. The size of D . mawsoni increased with depth. The dietary composition of D . mawsoni did not show significant differences by depth or sex, but did differ with site and size. D . mawsoni was the top predator in the ecosystem along the East Antarctic continental slope and can be considered an opportunistic feeder, feeding on abundant food in the environment. Therefore, additional studies of the diet of Antarctic toothfish are necessary to maintain the ecosystem structure and function in a changing environment, and the results of this study can be used as a monitoring baseline.

scholarly journals Metabarcoding analysis of the stomach contents of the Antarctic Toothfish (Dissostichus mawsoni) collected in the Antarctic Ocean

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3977 ◽  
Author(s):  
Tae-Ho Yoon ◽  
Hye-Eun Kang ◽  
Soo Rin Lee ◽  
Jae-Bong Lee ◽  
Gun Wook Baeck ◽  
...  
Keyword(s):  
Fish Species ◽  
Dna Barcode ◽  
Stomach Contents ◽  
Antarctic Ocean ◽  
Antarctic Toothfish ◽  
Dissostichus Mawsoni ◽  
Morphological Studies ◽  
The Antarctic ◽  
Prey Items

Stomach contents of the Antarctic toothfish, Dissostichus mawsoni, collected from subareas 58.4 and 88.3, were analyzed using next generation sequencing (NGS) technology. After processing the raw reads generated by the MiSeq platform, a total of 131,233 contigs (130 operational taxonomic units [OTUs]) were obtained from 163 individuals in subarea 58.4, and 75,961 contigs (105 OTUs) from 164 fish in subarea 88.3. At 98% sequence identity, species names were assigned to most OTUs in this study, indicating the quality of the DNA barcode database for the Antarctic Ocean was sufficient for molecular analysis, especially for fish species. A total of 19 species was identified from the stomach of D. mawsoni in this study, which included 14 fish species and five mollusks. More than 90% of contigs belonged to fish species, supporting the postulate that the major prey of D. mawsoni are fish. Two fish species, Macrourus whitsoni and Chionobathyscus dewitti, were the most important prey items (a finding similar to that of previous studies). We also obtained genotypes of prey items by NGS analysis, identifying an additional 17 representative haplotypes in this study. Comparison with three previous morphological studies and the NGS-based molecular identification in this study extended our knowledge regarding the prey of D. mawsoni, which previously was not possible. These results suggested that NGS-based diet studies are possible, if several current technical limitations, including the quality of the barcode database or the development of precise molecular quantification techniques to link them with morphological values, are overcome. To achieve this, additional studies should be conducted on various marine organisms.

Sign in / Sign up

Export Citation Format

Share Document