Gill morphometrics of the thresher sharks (GenusAlopias): Correlation of gill dimensions with aerobic demand and environmental oxygen

AbstractSpinosaurus aegyptiacus was probably the largest predatory dinosaur of the Cretaceous period. A new study shows that it was a semiaquatic hunter. The function of Spinosaurus’ huge dorsal ‘sail’ remains unsolved, however. Three hypotheses have been proposed: (1) thermoregulation; (2) humpback storage; or (3) display. According to our alternative hypothesis, the submerged sail would have improved manoeuvrability and provided the hydrodynamic fulcrum for powerful neck and tail movements such as those made by sailfish or thresher sharks when stunning or injuring prey. Finally, it could have been employed as a screen for encircling prey underwater.

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Insights into catch-and-release survivorship and stress-induced blood biochemistry of common thresher sharks (Alopias vulpinus) captured in the southern California recreational fishery

Fisheries Research ◽

10.1016/j.fishres.2010.09.024 ◽

2010 ◽

Vol 106 (3) ◽

pp. 495-500 ◽

Cited By ~ 58

Author(s):

C. Heberer ◽

S.A. Aalbers ◽

D. Bernal ◽

S. Kohin ◽

B. DiFiore ◽

...

Keyword(s):

Southern California ◽

Blood Biochemistry ◽

Catch And Release ◽

Recreational Fishery ◽

Alopias Vulpinus ◽

Thresher Sharks

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Comparison of mechanical power and aerobic demand during walking

Journal of Biomechanics ◽

10.1016/0021-9290(91)90259-p ◽

1991 ◽

Vol 24 (3-4) ◽

pp. 261

Author(s):

Philip E. Martin ◽

Gary D. Heise ◽

Don W. Morgan

Keyword(s):

Mechanical Power ◽

Aerobic Demand

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Aerobic and Anaerobic Threshold Determined by Specific Test in Judo Is Not Correlated with General Test

10.20944/preprints201710.0063.v1 ◽

2017 ◽

Author(s):

Paulo Azevedo ◽

João Carlos Oliveira ◽

Alessandro Zagatto ◽

Paulo Eduardo Pereira ◽

Sergio Eduardo Andrade Perez

Keyword(s):

Anaerobic Threshold ◽

Peak Load ◽

Moderate Correlation ◽

Treadmill Test ◽

Weak Correlation ◽

Incremental Test ◽

Specific Test ◽

General Test ◽

Aerobic Demand ◽

Aerobic And Anaerobic

Then the purposes of this study were to compare and correlate the aerobic threshold (THaer) and anaerobic threshold (THanaer) measured during a new single judo specific incremental test and Treadmill Test for aerobic demand evaluation. Eight well-trained male competitive judo players (24.3±7.9 years; height of 169.3±6.7cm; fat mass of 12.7±3.9%) performed a maximal incremental specific test for judo mimicking the UchiKomi drills and on treadmill in different days. There was difference between specific and general THaer (P=0.0006) as well as weak correlation for THaer (r=0.32; R2=0.1; P=0.2) and THanaer (rs=-0.31; R2=0.1; P=0.12). When correlation was applied with normalized data (percentage of peak load) we observed moderate correlation for THaer (r=0.76; R2=0.58; P=0.027), but the same was not observed for THanaer. We conclude that there is a need of THaer and THanaer evaluation through a specific test for Judo.

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Coasting of pelagic thresher sharks, alopias pelagicus, in comparison to two other species of the same ecomorphotype, and the limitation of video capturing in natural settings

Environmental Sciences ◽

10.12988/es.2014.452 ◽

2014 ◽

Vol 2 ◽

pp. 13-23 ◽

Cited By ~ 1

Author(s):

Erich Kurt Ritter

Keyword(s):

Natural Settings ◽

Thresher Sharks

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