Ontogenetic and Site-Related Trends in the Diet of the Atlantic Sharpnose Shark Rhizoprionodon Terraenovae From the Northeast Gulf Of Mexico
Document (DOC) | Southeast Fisheries Science Center (SEFSC)GUID: gov.noaa.nmfs.inport:46082 | Updated: August 9, 2022 | Published / External
Item Identification
Title: | Ontogenetic and Site-Related Trends in the Diet of the Atlantic Sharpnose Shark Rhizoprionodon Terraenovae From the Northeast Gulf Of Mexico |
---|---|
Status: | Completed |
Publication Date: | 2006-03-01 |
Abstract: |
Atlantic sharpnose shark Rhizoprionodon terraenovae (Richardson, 1836) diet is described from Crooked Island Sound, an embayment of the northeast Gulf of Mexico. Diet was assessed by life-stage and quantified using six indices: percent by number, percent by weight, frequency of occurrence, the index of relative importance (IRI), IRI expressed on a percent basis (%IRI), and %IRI based on prey category (%IRIPC). Young-of-the-year (YOY) sharks (n = 56 examined, 37 non-empty stomachs) fed on a mix of teleosts (mostly clupeids, 44.6 %IRIPC) and invertebrates (combined, 25.1 %IRIPC), juveniles (n = 185 examined, 118 non-empty stomachs) on sciaenids (40.7 %IRIPC) and clupeids (37.8 %IRIPC), and mature sharks (n = 105 examined, 67 non-empty stomachs) on sciaenids (71.4 %IRIPC). Differences in diet by site and ontogeny were tested by comparing the diet from Crooked Island Sound with previous published data from areas off St. Vincent Island in Apalachicola Bay, an adjacent estuary. Stomach contents were also used to expand on published prey sizepredator size information. Spearman correlation analysis, Pianka’s overlap values, null-model simulations, and simple correspondence analysis showed that life stage diet differed within and between sites. Three of four size-selectivity tests showed negative size selection. Absolute prey size and the range in absolute prey size increased with increasing shark size. Atlantic sharpnose shark diet was dominated by prey that were < 40% of shark length; however, 69% of prey items were 21%–40% of shark length while 26% were = 20% of shark length. Variations in diet composition within and between the two sites are likely due to differences in shark size, overall habitat structure, and availability of potential prey species. |
Other Citation Details: |
BULLETIN OF MARINE SCIENCE, 78(2): 287–307, 2006 |
Document Information
Document Type: | Journal article |
---|---|
Format: | Acrobat Portable Document Format |
Status Code: | Published |
Support Roles
Author
Date Effective From: | 2006-03-01 |
---|---|
Date Effective To: | |
Contact (Person): | Bethea, Dana M |
Address: |
263 13th Avenue South St Petersberg, FL 33701 |
Email Address: | Dana.Bethea@noaa.gov |
Contact Instructions: |
Phone or email |
Co-Author
Date Effective From: | 2006-03-01 |
---|---|
Date Effective To: | |
Contact (Person): | Carlson, John |
Address: |
3500 Delwood Beach Road Panama City, FL 32408 |
Email Address: | John.Carlson@noaa.gov |
Phone: | 850-234-6541 x221 |
Fax: | 850-235-3559 |
Contact Instructions: |
Phone or email |
Access Information
Security Class: | Unclassified |
---|---|
Data Access Procedure: |
The data will be available from a public web server once an access methodology has been developed. |
Data Access Constraints: |
None |
URLs
URL 1
URL: | http://www.ingentaconnect.com/contentone/umrsmas/bullmar/2006/00000078/00000002/art00005 |
---|---|
URL Type: |
Online Resource
|
Description: |
Landing Page For abstract of journal article. The journal article may be downloaded from that location. |
Catalog Details
Catalog Item ID: | 46082 |
---|---|
GUID: | gov.noaa.nmfs.inport:46082 |
Metadata Record Created By: | Lee M Weinberger |
Metadata Record Created: | 2017-05-17 15:54+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2022-08-09 17:11+0000 |
Metadata Record Published: | 2021-10-19 |
Owner Org: | SEFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2021-10-19 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2022-10-19 |