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Ralf Riedel
Box 1211
Imperial Beach, CA 91933
[email protected]

Imperial Beach, May 15, 2000.
Dr. Pitcher/Pauly
University of British Columbia
Fisheries Centre
British Columbia, Canada
This resume is in response to the post-doctoral position you announced over the Fish-Sci list-server. I received my Doctorate this year and am currently working on a restoration project for the Salton Sea, California, under Drs. Barry Costa-Pierce and Stuart Hurlbert. I am investigating fish reproduction, movement, and growth, as well as the fish population dynamics of the Sea and am committed until August 2000. My main interests are stated in my resume and are in the broad field of fisheries ecology. My advisors during my PhD were Douglas Austen and Peter Bayley, and during my Master of Science was Joseph DeAlteris. Phone numbers and e-mail addresses are provided in my resume.

Please, let me know if I can be of any more help. Sincerely,

RESUME for Ralf Riedel
Box 1211
Imperial Beach, CA 91933

University of Illinois U/C. Ecology. Emphasis: Management of natural resources.

Master of Science:
1993 - University of Rhode Island. Fishery Science and Technology. Emphasis: Selectivity of fish harvesting gears.
Bachelor of Science:
1986 - University of Pernambuco. Fisheries Engineering. Emphasis: Design of fish harvesting gears.
Professional Experience
Institution:  San Diego State University
Position:     Adjunct Faculty
Period:       1999 - present

Company:  On-The-Job Consulting
Position:    Computer Programmer (C/C++, ASP, Perl, CGI, SQL)
Period:      1998 - 1999

Institution:  Illinois Natural History Survey
Position:     Research Assistant
Period:        1993 - 1998

Company:  CEBEL
Position:    Software developer (C and Clipper) and system analyst.
Period:      1988 - 1990

Company:  Katsushio Suisan Kabushiki Kaisha
Position:   Gear Technologist in the skipjack pole-and-line fishery.
Period:     1986 - 1989
Research Experience (before Master of Science)
Use of adjustable sweep in the whiting trawl fisheries on south Georges Bank for the reduction of bycatch of regulated groundfish species. (1992)

Objectives: evaluate the effects of an adjustable sweep in reducing bycatch of flatfish in the whiting fishery.
My Function: Analyze size distribution of target and bycatch species. Evaluate fish behavior, net efficiency, and net geometry using underwater video camera system.

Evaluation of selective trawl designs in the New England whiting fishery. (1992)

Objectives: develop and evaluate an off bottom trawl net to separate whiting from non-target species of fish.
My Function: assess weight and size distribution of trawl catches and operate underwater video camera system to evaluate net geometry, efficiency, and fish behavior.

The effects of mechanical disturbance on the benthos in Narragansett Bay, Rhode Island. (1991-1992)

Objectives: Investigate effects of mechanical disturbance of estuarine sediments on the population structure of quahogs (Mercenaria mercenaria) and other infauna of Narragansett bay.
My Function: identification of crustaceans, nematodes, polychaetes, and oligochaetes.

Use of live bait for the Brazilian Northeastern line fishery. (1986)

Objectives: provide an efficient and cheap alternative bait for the hook and line fishing industry of the northeastern coast of Brazil.
My Function: Catch length-frequency data analyses.

Oceanographic sampling in the Brazilian northwestern Atlantic. (1986)

Objectives: collect chemical, physical, and biological data of open ocean ecosystems to construct hydrographic charts for the fishing industry.
My Function: collect and analyze water samples for temperature/salinity plots and for plankton abundance estimation.

Pollution Assessment of the Goiana River estuary, Brazil. (1983)

Objectives: determine the impact of sugar cane byproduct discharges on the fauna of riverine and estuarine species.
My Function: collect and analyze sediment cores, water samples and samples of fish and crustaceans.
Research Interests
My professional interest include research and teaching. My research interests are described below. The interaction with students and the potential for contributing to environmental literacy motivate my desire for teaching.

Main Research Interest

I am mainly interested in investigating the effects of fisheries on ecosystems. Most of our research effort has been directed at maximizing yields without much emphasis on the consequences that actions towards yield maximization will have on the ecosystem. I am interested in addressing the effects of current fishing practices because they may lead to irreversible consequences that are detrimental to marine systems.

I have worked in the fishing industry and realized first hand how damaging most fishing practices can be. Bottom trawling may affect the benthos either directly (resuspending the sediment, scraping the floor, or destruction of benthos) or indirectly (mortality of fish and long-term changes to the benthos). Complexity and biodiversity may be reduced and ecological services compromised when biogenic and sedimentary structures on fishing grounds are altered. Reduced habitat complexity may also increase vulnerability of exploited species to predation.

Removal of top predators by pelagic gear may affect the abundance of the remaining organisms and the equilibrium of the ecosystem. As an example, the incidence of shark bycatches in fisheries such as long-lines for tuna and billfishes may impact the ecosystem irreversibly and possibly affect catches of commercially important species. Similarly, the bycatch from small-meshed trawlers may cause a shift in community structure favoring non-commercial species.

There is little information on the impact of fishing on non-commercial species. Altering the basic productivity and structure of the ecosystem by harvesting a fraction of the biota may be a reason why we have been faced with so much uncertainty in fisheries management. Incorporating the various components of the ecosystem when managing fisheries resources may improve our understanding of fluctuations in fish abundance and be a step toward resource sustainability.

The management of fisheries within ecological principles by managing the ecosystem may provide a better alternative to resource sustainability. Ecosystem management is an all-inclusive, possibly more stable alternative to current management practices. If ecosystem management is to be successful, experiments are required of the fishing effects on habitat and species structure in an attempt to address the interconnections of marine systems.

Compromising the ecosystem to attain management goals is short-sighted to say the least. Given the current human population explosion the oceans will not be a solution to our protein problems. Overexploiting our oceans based on our putative needs will only aggravate the ecological problems we are now facing.
Other Research Interest

Quantitative Fisheries

-Evaluation of anthropogenic and environmental effects on fish populations.

-Relative effects of environmental and anthropogenic factors to evaluate the degree of uncertainty when managing fish stocks.

-Simulation models for stock assessment and sustainable management.

Marine Ecology

-Inter-intraspecies interactions.

-Predator/prey as related to fisheries - trophodynamics.
-Direct and indirect effects on ecosystems of predator or prey removals (as when overfishing takes place).

-Life-history of alternative fishery resources.

Fish Behavior

-Fish migration and spatial/temporal distribution.

-Seasonal and diel migrations of fish.
-Larval distributions according to environmental factors.

-Fish behavior in the vicinity of harvesting gears.

- Selection of fish harvesting gears.
Costa-Pierce, B. and R. Riedel. In press. Fisheries ecology of the tilapias in subtropical lakes in the United States. In B. Costa-Pierce and J. Rakocy (editors) Tilapia aquaculture in the Americas (Vol. II). World Aquaculture Society, Baton Rouge, LA.

DeAlteris, J. and R. Riedel. 1996. Effect of size selection within and between fishing gear type on the yield and spawning biomass per recruit and catch per unit of effort for a cohort of an idealized ground fish. Journal of the Northwestern Atlantic Fishery Science 19:73-82.

Perea, P., S. Sobaski, P. Bayley, R. Riedel, and D. Philipp. 1996. Database management and analysis of fisheries in Illinois lakes: optimizing fisheries management. Volume 1 Federal Grant F-69-R-(7-9).

Riedel, R. and J. DeAlteris. 1995. Factors affecting the performance of the nordmore grate system: a bycatch reduction device used in the Gulf of Maine shrimp fishery,  Fisheries Research 24:181-198.

Antecipated Publications

Riedel, R., P. Bayley, and D. Austen. Power analysis for annual variations in largemouth bass abundance using a temporally and spatially large-scale data set: years-as-replicate vs. lakes-as-replicate approaches. Transaction of the American Fisheries Society.

Riedel, R., P. Bayley, and D. Austen. Influences of environmental effects on the dynamics of largemouth bass. Canadian Journal of Fisheries and Aquatic Sciences.

Riedel, R., P. Bayley, and D. Austen. Effects of sport fisheries management in Illinois in determining largemouth bass fluctuations. North American Journal of Fisheries Management.

Riedel, R., P. Bayley, and D. Austen. Effects of water level fluctuations on growth of largemouth bass: a management alternative for mimicing flood pulses in artificial lakes. North American Journal of Fisheries Management.

Riedel, R., P. Bayley, and D. Austen. Variation in lake production for largemouth bass: the usefulness of morphoedaphic factors. Limnology and Oceanography.

Riedel, R., P. Bayley, and D. Austen. Intra-annual estimates of largemouth bass abundance based on electrofishing sampling: why do fish vary? Transaction of the American Fisheries Society.

Riedel, R., P. Bayley, and D. Austen. Comparison of largemouth bass year-class strength estimates based on age-zero and older fish. Canadian Journal of Fisheries and Aquatic Sciences.
Publications Reviewed
Hoff, M. Comparison of the effects of 10-in, 8-in, and no minimum length limits on the smallmouth bass population and fishery in Nebish lake, Wisconsin. North American Journal of Fisheries Management

Kircheis, F. and J. Trial. The effects of regulation on bait fish use by Maine anglers during the 1991 ice-fishing season and estimates of daily baitfish expenditures. North American Journal of Fisheries Management

Ploskey, G., J. Nestler, and W. Bivin. Predicting black bass reproductive success from reservoir hydrology. In Multidimensional approaches to reservoir fisheries management.
Scientific Presentations
1998 Information sufficiency of large-scale  data for fisheries management: the efficacy of largemouth bass length limits in Illinois. Annual Meeting of the American Fisheries Society, Hartford CT.

1994 Selectivity of a bycatch reduction device in the Gulf of Maine shrimp fishery. Annual Meeting of the American Fisheries Society (Illinois Chapter), Marion IL.

1992 The Nordmore Grate System: a bycatch reduction device used in the Gulf of Maine Shrimp fishery. MTS - Marine Science and Technology Society, Washington, DC.
Teaching Experience
Course: Computer Applications in Fishery Science.
Description: this course covered the use of statistical and fisheries software, and introduced students to computer programming and to the functioning of computer hardware.
Period: Spring 1993.

Course: Genetics, Evolution, and Biodiversity.
Description: this course covered molecular and population genetics, evolution, and plant/animal ecology and anatomy.
Period: fall 1996, spring and fall 1998.
Fluent in English, German, and Portuguese.
1 - Douglas J. Austen
[email protected]
Illinois Department of Natural Resources
600 N. Grand Ave.
Springfield, IL 62706
(217) - 785-5935

2 - Peter B. Bayley
[email protected]
Oregon State University
Dept. of Fisheries and Wildlife
104 Nash Hall
Corvalis, OR 97331
(541) - 737-0569

3 - Joseph T. DeAlteris
[email protected]
The University of Rhode Island
Dept. of Fisheries, Animal, and Veterinary Sciences
Kingston, RI 02881
(401) - 874-5333

4  Barry Costa-Pierce
[email protected]
University of Southern Mississippi
Ocean Springs, MS 39564

6  Stuart Hurlbert
[email protected]
San Diego State University
Dept. of Biology
San Diego, CA 92182-4614
(619)  594-5409

6 - Stephen Portnoy
[email protected]
University of Illinois
Urbana, IL 61801
(217) - 333-6217

7 - Steven Sobaski
[email protected]
Illinois Department of Natural Resources
600 N. Grand Ave.
Springfield, IL 62706
(217) - 785-8289

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