Hammond, D.

Muller-Karger, F.E.

Roffer, M.A.

Aquatic Commons

  Abstracts of Poster Presentations  GCFI:57  (2006)             Page 1037  
 
Fisheries Oceanographic Study Using GIS for Understanding 
the Changes in the Distribution of Mahi Mahi  
 Based on Tagging Data 
  
M.A. ROFFER1, D.  HAMMOND2, and F. MULLER-KARGER3 
1Roffer’s Ocean Fishing Forecasting Service Inc.  
2827 S.W. 69th Court  
Miami, Florida 33155 USA 
2 Marine Resources Division, South Carolina Dept. Natural Resources 
P. O. Box 12559 
 Charleston, South Carolina  29422 USA 
3Institute for Marine Remote Sensing, College of Marine Science, 
University of South Florida 
140 7th Avenue South 
St. Petersburg, Florida 33701USA 
 
 
The main aspect of this research is to characterize the functional relation-
ships that exist between dolphin fish (Coryphaena hippurus) and their oceanic 
ecosystem. GIS is being used as a tool to help identify and  quantitatively 
characterize the environmental parameters that appear important in understand-
ing changes in the distribution based on tag and recapture data. This research is 
a multi-disciplinary study involving  fisheries biology, physical oceanography, 
and remote sensing. Part of this study is the development of image processing 
and visualization tools to evaluate and merge data that exist in different spatial 
and temporal resolutions, as well as, different spectral bands. Infrared and  
ocean color - chlorophyll data will be derived from the AVHRR and MODIS 
sensor on the NOAA, Aqua, and Terra satellites. Evaluation of the develop-
ment and coherence in time and space of such physical parameters as ocean 
frontal boundaries (temperature, chlorophyll, turbidity, etc.) related to coastal 
plumes, as well as, Gulf Stream circulation features (e.g. meanders and eddies) 
is a critical aspect of this research. The ultimate goal is to provide diagnostic 
and predictive bio-physical models on the effects of ocean climate variability 
to fisheries resource managers and policy makers. 
 
KEY WORDS:  GIS, mahi mahi, Coryphaena hippurus, tagging data 
 
Estudio Oceanográfico de las Industrias Pesqueras Usando 
Sistema de Información Geografica para Entender los Cam-
bios en la Distribución de Mahi Mahi Basada en Datos de 
Marcaje y Recaptura 
 
El principal aspecto de esta investigación es caracterizar las relaciones 
funcionales que existen entre el dorado (Coryphaena hippurus) y su ecosiste-
ma oceánico. Se están utilizando el sistema de información geografica (GIS) 
como  una herramienta para ayudar a identificar y a caracterizar y cuantificar 
Page 1038                 57th Gulf and Caribbean Fisheries Institute  
 
los parámetros ambientales que parecen importantes para entender los cambios 
en su distribución basados en datos de marcaje y recaptura. Esta investigación 
es un estudio multidisciplinario que involucra las areas de biología pesquera, la 
oceanografía física, y la detección remota. Parte de este estudio es el desarrollo 
de las herramientas del proceso y de la visualización de imagenes para evaluar 
y para combinar los datos que existen en diversas resoluciones espaciales y 
temporales, así como, diversas bandas espectrales. Infrarrojo y color del 
océano - los datos de la clorofila serán derivados del sensor del AVHRR y de 
MODIS en los satélites de NOAA, Aqua, y Terra. Evaluación del desarrollo y 
de la coherencia en tiempo y espacio de los parámetros físicos tales como los 
límites frontales del océano (temperatura, clorofila, turbiedad, etc.) relacionado 
con los plumes costeros, tan bien como, las características de la circulación de 
la corriente del golfo (e.g. meanders y los remolinos) son un aspecto crítico de 
esta investigación. La última meta es proporcionar modelos biofísicos de 
diagnóstico y predicion en los efectos de la variabilidad del clima del océano a 
los encargados de administrar los recursos pesqueros y a los encargados de 
crear las políticas de administración. 
 
 
The Distribution of Recreational Fishing Effort and Harvest 
 in the Waters Around Puerto Rico 
 
HOLLY M. STONE1, DAVID W. CARTER2, and BRAD GENTNER3 
1Cooperative Institute for Marine and Atmospheric Science 
University of Miami 
 4600 Rickenbacker Causeway 
 Miami, Florida 33149 USA 
2Southeast Fisheries Science Center 
National Oceanic and Atmospheric Administration 
 75 Virginia Beach Drive,  
Miami, Florida 33149 USA  
3National Marine Fisheries Service 
National Oceanic and Atmospheric Administration 
1315 East-West Highway, Rm 12439 
 Silver Spring, Maryland  20910 USA 
 
 
The National Marine Fisheries Service’s Marine Recreational Fisheries 
Statistics Survey (MRFSS) has elicited catch and effort data from anglers 
throughout the U.S. since 1979.  However, the MRFSS collects little informa-
tion about where anglers fish once they leave the shore.  This information is 
needed to evaluate the spatial aspects of recreational fisheries, including the 
effects of management strategies such as marine protected areas. 
As part of a pilot study in Puerto Rico, questions were added to the 2003-
04 MRFSS asking anglers where they hooked the most fish and where they 
spent the most time.  We describe the development of the interview maps for 
this project and report preliminary results for the winter months of data 


Fisheries Oceanographic Study using GIS for understanding the changes in the distribution of Mahi Mahi based on tagging data [abstract of poster presentation]

http://aquaticcommons.org/14014/1/gcfi_57-97.pdf

Fisheries Oceanographic Study using GIS for understanding the changes in the distribution of Mahi Mahi based on tagging data [abstract of poster presentation]

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