scholarly journals Ultrasound‐guided sampling of the lateral abdominal vein in the grey nurse shark ( Carcharias taurus , Rafinesque 1810)

2020 ◽  
Vol 6 (3) ◽  
pp. 579-586
Author(s):  
Nicholas Otway
Keyword(s):  
Ultrasound Guided ◽  
Nurse Shark ◽  
Abdominal Vein ◽  
Carcharias Taurus

Effective population size of the critically endangered east Australian grey nurse shark Carcharias taurus

2019 ◽  
Vol 610 ◽  
pp. 137-148 ◽  
Author(s):  
S Reid-Anderson ◽  
K Bilgmann ◽  
A Stow
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Critically Endangered ◽  
Effective Population ◽  
Nurse Shark ◽  
Carcharias Taurus

scholarly journals Does the grey nurse shark (Carcharias taurus) exhibit agonistic pectoral fin depression? A stereo-video photogrammetric assessment off eastern Australia

2016 ◽  
Vol 22 (1) ◽  
pp. 3
Author(s):  
Kirby R. Smith ◽  
Carol Scarpaci ◽  
Brett M. Louden ◽  
Nicholas M. Otway
Keyword(s):  
Sampling Methods ◽  
Pectoral Fin ◽  
Nurse Shark ◽  
Management Guidelines ◽  
Life History Stages ◽  
Stereo Video ◽  
Eastern Australia ◽  
Wide Range ◽  
Stereo Photogrammetry ◽  
Carcharias Taurus

Underwater stereo-video photogrammetry was used to document the pectoral fin positions of various life-history stages of the critically endangered east Australian population of the grey nurse shark (Carcharias taurus) during normal swimming behaviour at multiple aggregation sites. A wide range in pectoral fin positions was recorded with dihedral pectoral fin angles ranging from –25 to 88°. Pectoral fin angles varied significantly among sites and this was attributed to the differing navigational and energetic requirements of the sharks. There was no significant relationship between pectoral fin angles and distances separating the shark and scuba diver. The wide range in pectoral fin angles, interactive use of the fins during swimming, low-energy behaviours of the sharks at aggregation sites and absence of ‘fight’ response agonistic behaviour indicated that the species does not exhibit agonistic pectoral fin depression. Reports of agonistic pectoral fin depression in the grey nurse shark obtained with visual estimates should be treated as preliminary observations requiring further testing using accurate sampling methods such as stereo photogrammetry. It is important that diver compliance with existing management guidelines that prohibit divers from chasing or harassing grey nurse sharks and blocking cave and gutter entrances is maintained.

Nuclear and mitochondrial DNA reveals isolation of imperilled grey nurse shark populations (Carcharias taurus)

2009 ◽  
Vol 18 (21) ◽  
pp. 4409-4421 ◽  
Author(s):  
H. AHONEN ◽  
R. G. HARCOURT ◽  
A. J. STOW
Keyword(s):  
Mitochondrial Dna ◽  
Nurse Shark ◽  
Carcharias Taurus
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