A Comparison of the Foraging Ecology and Bioenergetics of the Early Life-Stages of Two Sympatric Hammerhead Sharks
Southeast Fisheries Science Center
Document
(DOC)
| ID: 45944
| Published / External
Created: 2017-05-01
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Last Modified: 2022-08-09
Data Set (DS) | ID: 24913
ID: 45944
Document (DOC)
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* » Title | A Comparison of the Foraging Ecology and Bioenergetics of the Early Life-Stages of Two Sympatric Hammerhead Sharks |
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* Status | Completed |
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• Publication Date | 2011-10-01 |
* » Abstract |
Juvenile scalloped hammerhead sharks, Sphyrna lewini (Griffith and Smith, 1834), were collected in northwest Florida to examine foraging ecology, bioenergetics, and trophic level [30–60 cm fork length (FL); mean FL= 41.5 cm; N = 196]. Diet analysis was performed using single and compound measures of prey quantity, as well as seven broad diet categories. Diet composition and estimated daily ration were compared to previously published information on bonnethead sharks, Sphyrna tiburo (Linnaeus, 1758). Diet overlap was low between species. Juvenile S. lewini feed on relatively small (85% of prey items < 5% shark length) teleosts (mostly bothids and sciaenids) and shrimps, whereas juvenile S. tiburo has been documented to feed mostly on crustaceans and plant material. Plant material contributed little to the diet of S. lewini. Estimated daily ration was significantly lower for S. lewini than for S. tiburo, regardless of whether plant material was included in the model. Trophic level was calculated at 4.0 for S. lewini and 2.6 for S. tiburo. stable isotope analysis showed S. lewini had significantly higher d15N values and significantly lower d13C values than S. tiburo, consistent with the difference observed in calculated trophic level. These results provide evidence that juvenile hammerhead species coexist in coastal northwest Florida by feeding at separate trophic levels. |
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DOI: https://doi.org/10.5343/bms.2010.1047 Bethea, D.M., Carlson, J.K., Hollensead, L.D., Papastamatiou, Y.P. and Graham, B.S., 2011. A comparison of the foraging ecology and bioenergetics of the early life-stages of two sympatric hammerhead sharks. Bulletin of Marine Science, 87(4), pp.873-889. |
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Keywords
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None | diet |
None | foraging ecology |
None | resource partitioning |
None | S. lewini |
None | S. tiburo |
None | scalloped hammerhead sharks |
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None | 1998-2005 |
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None | Crooked Island Sound |
None | gulf of mexico |
None | northwest Florida |
None | St. Vincent Island |
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Document Type | Journal article |
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Format | Acrobat Portable Document Format |
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Status Code | Published |
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* » Support Role | Author |
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* » Date Effective From | 2011 |
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Person | Bethea, Dana M |
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263 13th Avenue South St Petersberg, FL 33701 |
Email Address | Dana.Bethea@noaa.gov |
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No longer works for NMFS Panama City Lab |
* » Support Role | Co-Author |
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* » Date Effective From | 2011 |
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Person | Carlson, John |
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3500 Delwood Beach Road Panama City, FL 32408 |
Email Address | John.Carlson@noaa.gov |
Phone | 850-234-6541 x221 |
Fax | 850-235-3559 |
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Data not for use in litigation. cite as Bethea, D.M., Carlson, J.K., Hollensead, L.D., Papastamatiou, Y.P. and Graham, B.S., 2011. A comparison of the foraging ecology and bioenergetics of the early life-stages of two sympatric hammerhead sharks. Bulletin of Marine Science, 87(4), pp.873-889 |
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URL | http://www.ingentaconnect.com/contentone/umrsmas/bullmar/2011/00000087/00000004/art00009 |
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URL | https://doi.org/10.5343/bms.2010.1047 |
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Catalog Details
Catalog Item ID | 45944 |
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Metadata Record Created By | Lee M Weinberger |
Metadata Record Created | 2017-05-01 22:01+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2022-08-09 17:11+0000 |
Metadata Record Published | 2022-05-31 |
Owner Org | SEFSC |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2022-05-31 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2023-05-31 |
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