Phaselis Antik Kenti Kuzey Limanı nda Bir Boz Camgöz (Hexanchus griseus Bonnaterre, 1788)

Trophic ecology of a large-bodied marine predator, bluntnose sixgill shark Hexanchus griseus, inferred using stable isotope analysis

Environmental Biology of Fishes ◽

10.1007/s10641-019-00941-z ◽

2020 ◽

Vol 103 (2) ◽

pp. 147-162

Author(s):

Jonathan C. P. Reum ◽

Gregory D. Williams ◽

Chris J. Harvey ◽

Kelly S. Andrews ◽

Phillip S. Levin

Keyword(s):

Stable Isotope ◽

Stable Isotope Analysis ◽

Trophic Ecology ◽

Isotope Analysis ◽

Marine Predator ◽

Hexanchus Griseus

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Seasonal and daily movements of the bluntnose sixgill shark (Hexanchus griseus) in the strait of Georgia from satellite tag data

Environmental Biology of Fishes ◽

10.1007/s10641-017-0664-4 ◽

2017 ◽

Vol 100 (12) ◽

pp. 1543-1559 ◽

Cited By ~ 1

Author(s):

J. R. King ◽

A. M. Surry

Keyword(s):

Strait Of Georgia ◽

Satellite Tag ◽

Hexanchus Griseus

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Biological Aspects of the Sixgill Shark, Hexanchus griseus

Copeia ◽

10.2307/1444898 ◽

1986 ◽

Vol 1986 (1) ◽

pp. 131 ◽

Cited By ~ 36

Author(s):

David A. Ebert

Keyword(s):

Biological Aspects ◽

Hexanchus Griseus

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Abundance Trends for Hexanchus griseus, Bluntnose Sixgill Shark, and Hydrolagus colliei, Spotted Ratfish, Counted at an Automated Underwater Observation Station in the Strait of Georgia, British Columbia

The Canadian Field-Naturalist ◽

10.22621/cfn.v122i2.570 ◽

2008 ◽

Vol 122 (2) ◽

pp. 124 ◽

Cited By ~ 6

Author(s):

Robert Dunbrack

Keyword(s):

British Columbia ◽

Relative Abundance ◽

Time Lapse ◽

Video Monitoring ◽

Rocky Reef ◽

Observation Station ◽

Strait Of Georgia ◽

The Past ◽

Time Period ◽

Hexanchus Griseus

Recordings from a time lapse video monitoring station on a shallow rocky reef in the Strait of Georgia, British Columbia, revealed a steep and continuous decline in the occurrence of Hexanchus griseus (Bluntnose Sixgill Shark) between 2001 and 2007, with relative abundance in 2006 and 2007 less than 1% of that in 2001. The relative abundance of another chondrichthyan, Hydrolagus colliei (Spotted Ratfish), decreased to 15% of 2004 levels in 2005 and 2006 and remained below 25% in 2007. There is no compelling explanation for these decreases. Over the past 25 years water temperatures have increased in the Strait of Georgia and there have been a number of El Niño warm water events, but diver observations of H. griseus at this site over the same time period give no indication of prior changes in abundance. Neither species is targeted by a fishery, but injuries, possibly related to hooking and entanglement, observed in 28% of individually identified H. griseus suggests this species may be taken locally as bycatch.

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