Slide Menu
Search Help Show/Hide Menu

Item Identification

Title: Red Porgy Study
Short Name: Red Porgy Study
Status: Completed

This study examined the reproductive ecology of the red porgy Pagrus pagrus (Sparidae) in the NE Gulf of Mexico and the temporal, bathymetric, and small scale spatial variability of its life history traits and demographics. Almost 4000 specimens were collected using standardized hook and line gear year-round, Mar 1998-Sep 2001, in the NE Gulf - most (n=2,586) at 9 sites off NW Florida in 30-68 m.

Spawning grounds were widespread, spawning occurred primarily Dec ? Feb, and 50% of females matured at 211 mm and <2 yr. Fish changing sex were found Mar-Nov at all 9 primary sampling sites, and were 206 - 417 mm TL and ages 2 - 9 yr, strong evidence the process is socially controlled. Red porgy are permanently sexually dichromatic, pair spawners, and do not form large, predictable spawning aggregations. Neither protogyny nor their reproductive ecology appears to make them more sensitive than gonochorists to exploitation - they are probably less so in some cases. Traits such as widespread spawning grounds, no tendency to form spawning aggregations, absence of behaviorally-related size or sex selectivity, socially controlled sex change, co-occurrence of sexes year-round, and an extended period of transition, should stabilize or enable rapid compensation of sex ratios in red porgy (preventing sperm limitation or disruption of mating).

Size and age composition, size at age, survival rates, transition rates, sizes and ages at transition, and sex ratios all differed significantly at a scale of only 10?s of km. Environmental heterogeneity and site fidelity probably explain most of those differences, which likely reflect phenotypic, not genetic, effects. Habitat patches likely have variable hydrological, geological, biological, exploitation, and ecological characteristics. Once recruited to a patch, philopatric adults are exposed to a unique suite of factors which could affect growth, mortality, and reproduction. Such small spatial scale differences in many traits suggests a complex structure of local subpopulations; these resemble Crowder et al.?s (2000) sources and sinks or the broadly - defined metapopulation of Kritzer and Sale (2004). Pooled data from such a complex population structure could introduce excessive variability to parameter estimates and bias stock assessments.


1. Collect information on the reproduction and reproductive ecology of red porgy in the NE Gulf, including determine if and how sex ratio, transition rates, size and age at transition, and size and age at maturity varied temporally, bathymetrically or spatially at scales of 10's of km or less.

2. Determine size and age structure, growth, and mortality of red porgy in the NE Gulf, and whether any of those demographics and life history traits varied temporally, bathymetrically, or spatially at scales of 10's of km or less.

3. Gain insight on how fishing might affect protogynous species, and in particular, why red porgy in the South Atlantic Bight off the SE U.S. seemed so sensitive to exploitation and whether protogyny played any role in that sensitivity.

Other Citation Details:

The life history, reproductive ecology, and demography of the red porgy, Pagrus pagrus, in the northeastern Gulf of Mexico

Douglas A. DeVries, PhD Dissertation, Florida State University, 2006

Supplemental Information:

Fisheries Independent Data


Theme Keywords

Thesaurus Keyword
None age structure
None demography
None growth
None life history
None mortality
None Pagrus pagrus
None protogyny
None Red Porgy
None reproductive ecology

Temporal Keywords

Thesaurus Keyword
None 1998-2001

Spatial Keywords

Thesaurus Keyword
None Alabama
None Florida
None Gulf of Mexico

Physical Location

Organization: Panama City Laboratory
City: Panama City
State/Province: FL
Location Description:

Panama City Laboratory

Project Information

Project Type: Activity
Collection Method: Electronic, Paper, Photographic,Biological Samples

Support Roles

Data Steward

CC ID: 565653
Date Effective From: 2017
Date Effective To:
Contact (Person): Gardner, Chris L
Address: 3500 Delwood Beach Road
Panama City, FL 32408
Email Address:
Phone: 850-234-6541 x 262
Fax: 850-235-3559
Contact Instructions:

Phone or email

View Historical Support Roles


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 7637
W° Bound: -88.34
E° Bound: -83.66
N° Bound: 30.24385
S° Bound: 25.851

Extent Group 1 / Time Frame 1

CC ID: 7639
Time Frame Type: Range
Start: 1998-03-01
End: 2001-09-30

Access Information

Security Class: Unclassified
Data Access Policy:

To fishery Scientists and other qualified researchers upon request

Data Access Constraints:

NOAA Data Quality Act Documentation and Pre-Dissemination guidelines

Data Use Constraints:

Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable, NOAA cannot assume liability for any damages or misrepresentations caused by inaccuracies in these data, or as a result of these data being used on a particular system. NOAA makes no warranty, expressed or implied, nor does distribution constitute any such warranty

Metadata Access Constraints:


Technical Environment


This data set is on the PC of the collection item originator as well as on some backup disks. It also has been added to the Panama City Lab's age data base.

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Data Set Red Porgy Reproductive Analysis

Catalog Details

Catalog Item ID: 3836
GUID: gov.noaa.nmfs.inport:3836
Metadata Record Created By: Lee M Weinberger
Metadata Record Created: 2007-03-28 06:12+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:10+0000
Metadata Record Published: 2022-05-04
Owner Org: SEFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-05-04
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-05-04