scholarly journals Validation of the use of vertebrae and dorsal-fin spines for age determination of spiny dogfish (Squalus acanthias) in the western North Atlantic Ocean

2021 ◽  
Vol 119 (1) ◽  
pp. 41-49
Author(s):  
Kelsey C. James ◽  
Lisa J. Natanson ◽  
Christopher Flight ◽  
Cindy Tribuzio ◽  
John Hoey ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Age Determination ◽  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
Dorsal Fin ◽  
Fin Spines

Are Pacific spiny dogfish lying about their age? A comparison of ageing structures for Squalus suckleyi

2018 ◽  
Vol 69 (1) ◽  
pp. 37 ◽  
Author(s):  
Cindy A. Tribuzio ◽  
Mary Elizabeth Matta ◽  
Christopher Gburski ◽  
Calvin Blood ◽  
Walter Bubley ◽  
...  
Keyword(s):  
Age Determination ◽  
Spiny Dogfish ◽  
Suitable Alternative ◽  
Thin Sections ◽  
Full Sample ◽  
Vertebral Centra ◽  
Dorsal Fin ◽  
Sample Set ◽  
Fin Spines

Historically, Pacific spiny dogfish (Squalus suckleyi) have been aged using dorsal fin spines, a method that was validated through bomb radiocarbon analysis and oxytetracycline tagging. However, ages generated using this method generally have poor precision and require estimation of missing growth bands in eroded spines, prompting a search for improved age determination methods. In the present study, spiny dogfish were aged using the historical spine method and a new method involving stained thin sections of vertebral centra. Results of an inter-laboratory exchange demonstrated the need for readers to calibrate ageing criteria with a reference collection before reading structures, a practice that yielded significant improvements in between-reader precision of spine band pair counts. After calibration, the primary readers examined the full sample set. The two structures yielded similar age estimates for younger animals, but centrum estimates were consistently younger than spine estimates after age-10. Although further work is necessary to fully explore potential reasons for the observed bias, such as centrum size and location within the vertebral column, at the present time centra are not a suitable alternative to dorsal fin spines for age determination of Pacific spiny dogfish >10 years of age.

scholarly journals Use of satellite tags to reveal the movements of spiny dogfish Squalus acanthias in the western North Atlantic Ocean

2010 ◽  
Vol 418 ◽  
pp. 249-254 ◽  
Author(s):  
JA Sulikowski ◽  
B Galuardi ◽  
W Bubley ◽  
NB Furey ◽  
WB Driggers ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Squalus Acanthias ◽  
Spiny Dogfish

scholarly journals A real‐time PCR assay to detect predation by spiny dogfish on Atlantic cod in the western North Atlantic Ocean

2020 ◽  
Vol 10 (20) ◽  
pp. 11022-11030
Author(s):  
Steven C. Pitchford ◽  
Brian E. Smith ◽  
Richard S. McBride
Keyword(s):  
Atlantic Ocean ◽  
Real Time ◽  
North Atlantic ◽  
Real Time Pcr ◽  
Atlantic Cod ◽  
North Atlantic Ocean ◽  
Spiny Dogfish ◽  
Pcr Assay

Age Determination of an Elasmobranch (Squalus acanthias) by X-ray Spectrometry

1977 ◽  
Vol 34 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Barry C. Jones ◽  
Glen H. Geen
Keyword(s):  
Age Determination ◽  
Element Composition ◽  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
Strait Of Georgia ◽  
X Ray ◽  
Spectrometric Technique

Ages of spiny dogfish (Squalus acanthias) in the Strait of Georgia, B.C., have been estimated by an X-ray spectrometric technique which involves measuring variations in the element composition within vertebrae.

Reassessment of spiny dogfish Squalus acanthias age and growth using vertebrae and dorsal-fin spines

2011 ◽  
Vol 80 (5) ◽  
pp. 1300-1319 ◽  
Author(s):  
W. J. Bubley ◽  
J. Kneebone ◽  
J. A. Sulikowski ◽  
P. C. W. Tsang
Keyword(s):  
Squalus Acanthias ◽  
Age And Growth ◽  
Spiny Dogfish ◽  
Dorsal Fin ◽  
Fin Spines
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