Phone: 772-468-3922 ext. 130
Indian River Research and Education Center
2199 South Rock Road
Fort Pierce FL 34945 USA
Research Interests: Dr.
Ohs joined the SFRC and IRREC faculty in July 2005. His research
focuses on marine baitfish production, copepod production, reproduction
of marine finfish, and nutrition of fish and crustacean species
from larval to adult stages of development. He also has research
interests in fish and crustacean physiology, endocrinology, larval
nutrition, food science, and marketing.
Extension Programs: Dr. Ohs works
with current aquaculture producers to increase the efficiency
of their operations and when appropriate, diversifying the number
of organisms they culture. He provides information to individuals
with interest in aquaculture who are evaluating the possibility
of diversifying their farm operations to include production of
various aquatic organisms. To increase awareness of aquaculture
among youth, he led the development of a curriculum on aquaculture
and the aquatic sciences for middle and high school teachers to
implement in their classrooms. It is titled
FAS 6932/4932 Introduction to Aquaculture:
The field of aquaculture requires knowledge of subjects including
biology, chemistry, water quality, nutrition, disease, engineering,
life history, ecology, and husbandry. This course touches on all
of these topics and how they are important to aquaculture. This
course consists of 20 lectures, 20 quizzes, two exams, supporting
literature and photos. The entire course is online in Sakkai format.
The lectures are PowerPoint presentations with voice recordings.
Topics covered include an introduction to aquaculture, fish biology,
water quality, recirculating systems, ponds, net pens, nutrition
and feed manufacture, handling and hauling, spawning, disease,
prawns/shrimp, catfish, hybrid striped bass, tilapia, salmonids,
ornamental fish, clams, and other important species. Co-instructor
FAS 6905 Fish and Crustacean Nutrition:
This course consists of 16 lectures and two exams. Lectures use
PowerPoint presentations, extension publications, and incorporate
chapters of two books. The topics covered include digestive physiology,
energy, protein/amino acids, lipids/fatty acids, carbohydrates,
vitamins/minerals, feed formulation, feed manufacture, nutrition
of broodstock, larvae, catfish, hybrid striped bass, tilapia,
Atlantic salmon, marine fish, and digestive physiology and nutrition
Cassiano, E.J., C.L. Ohs, C.R. Weirich, N.E. Breen,
and A.L. Rhyne. Accepted. Evaluation of larval Florida pompano,
Trachinotus carolinus, fed nauplii of the calanoid copepod Pseudodiaptomous
pelagicus. North American Journal of Aquaculture.
D’Abramo, L. R., T. Hanson, and C.L. Ohs.
Accepted. Pelleted sources of nutrition for the low input farming
of the freshwater prawn Macrobrachium rosenbergii in earthen ponds.
Journal of the World Aquaculture Society.
Ohs, C.L., A.L. Rhyne, S.W. Grabe, M.A DiMaggio,
and E. Stenn. 2010. Effects of salinity on reproduction and survival
of the Calanoid copepod Pseudodiaptomus pelagicus. Aquaculture
Ohs, C.L., K.A. Chang, S.W. Grabe, M.A. DiMaggio,
and E. Stenn. 2010. Evaluation of dietary microalgae for culture
of the Calanoid copepod Pseudodiaptomus pelagicus. Aquaculture
DiMaggio, M.A., C.L. Ohs, and B.D. Petty. 2010.
Evaluation of a point-of-care blood analyzer for use in determination
of select hematological indices in the Seminole killifish. North
American Journal of Aquaculture 72: 261-268.
DiMaggio, M.A., S.W. Grabe, S.M. DeSantis, and C.L.
Ohs. 2010. Induced volitional spawning and larval rearing of pinfish,
Lagodon rhomboides. North American Journal of Aquaculture 72:
DiMaggio, M.A., C.L. Ohs, S.W. Grabe, B.D. Petty,
and A.L. Rhyne. 2010. Osmoregulatory evaluation of Fundulus seminolis
following gradual seawater acclimation. North American Journal
of Aquaculture 72: 124-131.
Ohs, C.L., S.W. Grabe, S.M. DeSantis, M.A. DiMaggio,
and A.L. Rhyne. 2010. Culture of pinfish (Lagodon rhomboides)
at different stocking densities and salinities in recirculating
aquaculture systems. North American Journal of Aquaculture 72:
DiMaggio, M.A., C.L. Ohs, and B.D. Petty. 2009.
Salinity tolerance of the Seminole killifish, Fundulus seminolis,
a candidate species for marine baitfish aquaculture. Aquaculture
Rhyne, A.L., C.L. Ohs, and E. Stenn. 2009. Effects
of temperature on reproduction and survival of the calanoid copepod
Pseudodiaptomous pelagicus. Aquaculture 292: 53-59.
Ohs, C.L., A.L. Rhyne , and E. Stenn. 2009. Viability
of subitaneous eggs of the calanoid copepod, Acartia tonsa (Dana),
following exposure to various cryoprotectants and hypersaline
water. Aquaculture 287: 114-119.
DiMaggio, M.A., B.D. Petty, and C.L. Ohs. 2008.
The parasitic fauna of the Seminole Killifish, Fundulus seminolis,
from Lake George, Florida. Bulletin of the European Association
of Fish Pathologists 28: 236-242.
Ohs, C.L. and L.R. D’Abramo. 2006. Comparison
of early season versus late season trap schedules for harvest
of Red Swamp Crawfish Procambarus clarkii cultured in earthen
ponds without planted forage. Journal of Shellfish Research 25:
Ohs, C.L., L.R. D’Abramo, and A.M. Kelly.
2006. Evaluation of dietary administration of 17alpha - methyltestosterone
to freshwater prawn Macrobrachium rosenbergii as a means to control
sexual differentiation. Journal of the World Aquaculture Society
Ohs, C.L., L.R. D’Abramo, L. Petrie-Hanson,
and A.M. Kelly. 2006. Apparent control of sexual differentiation
of freshwater prawn Macrobrachium rosenbergii through dietary
administration of dopamine hydrochloride. Journal of Applied Aquaculture
D'Abramo, L.R., C.L. Ohs, and K.C.E. Elgarico. 2006.
Effect of added substrate on production of red swamp crawfish
(Procambarus clarkii) in earthen ponds without planted forage.
Journal of the World Aquaculture Society 37: 307-312.
D'Abramo, L.R., C.L. Ohs, and T.R. Hanson. 2004.
Effect of stocking weight and stocking density on production of
hybrid striped bass (sunshine) in earthen ponds in the second
phase of a 2-phase system. Journal of the World Aquaculture Society
D'Abramo, L. R., C.L. Ohs and K.C. Elgarico. 2003.
Production of red swamp crawfish (Procambarus clarkii) in earthen
ponds without planted forage: Evaluation of trap and seine harvest
strategies. Journal of Shellfish Research 22: 527-531.
D'Abramo, L.R., and C.L. Ohs. 2003. Production of
red swamp crawfish (Procambarus clarkii) in earthen ponds without
planted forage: establishment, maintenance, and harvest of populations.
Journal of Shellfish Research 22: 521-525.
Kovalenko, E.E., L.R. D'Abramo, C.L. Ohs, and R.K.
Buddington. 2002. A successful microbound diet for the larval
culture of freshwater prawn (Macrobrachium rosenbergii). Aquaculture
D'Abramo, L.R., C.L. Ohs, T.R. Hanson, and J.B.
Taylor. 2002. Production and economic analysis of two-phase and
three-phase culture of sunshine bass in earthen ponds. North American
Journal of Aquaculture 64: 103-112.
D'Abramo, L.R., C.L. Ohs, and J.B. Taylor. 2000.
Effects of reduced levels of dietary protein and menhaden fish
meal on production, dressout and biochemical composition of phase
III sunshine bass (Morone chrysops x M. saxatilis) cultured in
earthen ponds. Journal of the World Aquaculture Society 31: 316
Ohs, C.L., L.R. D'Abramo, R.K. Buddington, H.R.
Robinette, J.M. Roethke. 1998. Evaluation of a spray dried artificial
diet for larval culture of freshwater prawn, Macrobrachium rosenbergii,
and striped bass, Morone saxatilis. Aquaculture Nutrition 4: 73