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Stephen Andrew Watts
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Publications:
Watts, S.A. and J.M. Lawrence. 1982. Effect of starvation on enzyme activities and nutrient stores in the pyloric caeca of Echinaster sp. (Echinodermata: Asteroidea). Comp. Biochem. Physiol. 72B:461-463.
Watts, S.A. and J.M. Lawrence. 1982. Activity and kinetic characteristics of triosephosphate isomerase from the pyloric caeca of Echinaster sp. (Echinodermata: Asteroidea) exposed to different temperatures. Comp. Biochem. Physiol. 73B:881-885.
Watts, S.A., R. Scheibling, A. Marsh and J.B. McClintock. 1982. Effect of temperature and salinity on larval development of sibling species of Echinaster (Echinodermata: Asteroidea) and their hybrids. Biol. Bull. 163:348-354.
Watts, S.A., R. Scheibling, A. Marsh and J.B. McClintock. 1983. Induction of aberrant ray numbers in Echinaster sp. (Echinodermata: Asteroidea) by high salinity. Fla. Sci. 46:125-128.
Dawes, C., C.P. Chen, J. Jewett-Smith, A. Marsh and S.A. Watts. 1984. Effect of phosphate and ammonia levels on photosynthetic and respiratory responses of the red alga Gracilaria verrucosa. Mar. Biol. 78:325-328.
Herrin, D., C. Helling and S.A. Watts. 1985. Relative levels of actin and actin gene sequences in tube feet and pyloric caeca of adult starfish Luidia clathrata (Echinodermata). Comp. Biochem. Physiol. 81B:143-147.
Watts, S.A. and J.M. Lawrence. 1985. The effect of feeding and starvation on the level and content of nucleic acids in the pyloric caeca of Luidia clathrata (Say). In: B.F. Keegan and B. ACINAR (eds.), Echinodermata. Proceedings of the Fifth International Echinoderm Conference, Galway. A.A. Balkema, Rotterdam. pp. 571-576.
Marsh, A., S.A. Watts, C. Chen and J.B. McClintock. 1986. The effect of high salinity on development, mortality, and number of Echinaster spinulosus (Echinodermata: Asteroidea) at different developmental stages. Comp. Biochem. Physiol. 83A:229-231.
Watts, S.A. and J.M. Lawrence. 1986. Seasonal effects of temperature and salinity on the organismal activity of the sea star Luidia clathrata (Say) (Echinodermata: Asteroidea). Mar. Behav. Physiol. 12:161-169.
Lawrence, J.M., T.S. Klinger, J.B. McClintock, S.A. Watts, C.P. Chen, A.G. Marsh and L. Smith. 1986. Allocation of nutrient resources in the regenerating asteroid Luidia clathrata. J. Exp. Mar. Biol. Ecol. 102:47-53.
Watts, S.A. and J.M. Lawrence. 1987. The effects of 17B-estradiol and esterone on intermediate metabolism of the pyloric caeca of the asteroid Luidia clathrata (Say) maintained under different nutritional regimes. Devel. Growth Differ. 29:15-160.
Watts, S.A., K. Lee, G. Hines and C.W. Walker. 1987. Determination of polyamines in reproductive and digestive tissues of Asterias vulgaris (Echinodermata: Asteroidea). Comp. Biochem. Physiol. 88B:309-312.
Klinger, T.S., S.A. Watts and D. Forcucci. 1988. Effects of short-term feeding and starvation on storage and synthetic capacities of gut tissues of Lytechinus variegatus (Lamarck) (Echinodermata: Echinoidea). J. Exp. Mar. Biol. Ecol. 117:187-195.
Saito, N. and S.A. Watts. 1989. Activities of hexosekinase, phosphofructokinase and pyruvate kinase in the body wall, pyloric caeca and tube feet of Asterias vulgaris: Evidence of body wall as a major source of glycolytic activity. Comp. Biochem. Physiol. 94B:263-267.
McClintock, J.B., T. Hopkins, S.A. Watts and K. Marion. 1990. The biochemical and energetic composition of somatic body components of echinoderms from the northern Gulf of Mexico. Comp. Biochem. Physiol. 95A:529-532.
Watts, S.A., J. Roy and C.W. Walker. 1990. Ornithine decarboxylase exhibits negative thermal modulation in the sea star Asterias vulgaris: Potential regulatory role during temperature-dependent testicular growth. Biol. Bull. 179:159-162.
Watts, S.A. and J.M. Lawrence. 1990. The effect of temperature and salinity interactions on righting, feeding and growth in the sea star Luidia clathrata (Say). Mar. Behav. Physiol. 17:159-165.
McClintock, J.B. and S.A. Watts. 1990. The effects of photoperiod on gametogenesis in the tropical sea urchin Eucidaris tribuloides (Echinodermata: Echinoidea). J. Exp. Mar. Biol. Ecol. 139:175-184.
Watts, S.A., G. Hines, K. Lee, D. Jaffurs, J. Roy, F. Smith and C.W. Walker. 1990. Seasonal patterns of ornithine decarboxylase activity and levels of polyamines in relation to the cytology of germinal cells during spermatogenesis in the sea star Asterias vulgaris. Tissue and Cell. 22:435-447.
Hines, G.A., S.A. Watts, S.A. Sower and C.W. Walker. 1990. Sex steroid extraction from Echinoderm tissues. J. Liquid Chromatography 13:248-2498.
Watts, S.A. and J.M. Lawrence. 1990. The effect of reproductive state, temperature, and salinity on DNA and RNA levels and activities of metabolic enzymes of the pyloric caeca in the sea star Luidia clathrata (Say). Physiol. Zool. 63:119-1215.
Hopkins, T.S., J.F. Valentine, J.B. McClintock, K. Marion and S.A. Watts. 1991. Community patterns of echinoderms associated with substrate and depth in the northern Gulf of Mexico. In: T. Yanagisawa, I. Yasumasu, C. Oguro, N. Suzuki and T. Motokawa (eds.), Proceedings of the Seventh International Echinoderm Conference, Atami, Biology of Echinodermata. A.A. Balkema, Rotterdam.
Hopkins, T.S., J.F. Valentine, J.B. McClintock, K. Marion and S.A. Watts. 1991. Echinoderms associated with a rhodolith community on the Alabama outer continental shelf: Management considerations for a unique environmental setting. In: Proceedings: Eleventh Annual Gulf of Mexico Information Transfer Meeting, November, 1990. U.S. Dept. of Interior. Minerals Management Service, New Orleans, LA. MMS Contract No. 14-35-0001-30499. pp. 443-448.
McClintock, J.B., T.S. Hopkins, S.A. Watts, K. Marion and G. Schinner. 1991. Variation in reproductive patterns in echinoderms from the northern Gulf of Mexico. In: Proceedings: Eleventh Annual Gulf of Mexico Information Transfer Meeting, November, 1990. U.S. Dept. of Interior. Minerals Management Service, New Orleans, LA. MMS Contract No. 14-35-0001-30499. pp. 448-452.
Hopkins, T.S., M.W. Cornett, J.B. McClintock., K. Marion and S.A. Watts. 1991. Secondary production: Differential arm loss in two sympatric species of sand stars. In: Proceedings: Eleventh Annual Gulf of Mexico Information Transfer Meeting, November, 1990. U.S. Dept. of Interior. Minerals Management Service. New Orleans, LA. MMS Contract No. 14-35-0001-30499. pp. 425-456.
Hines, G.A., J.B. McClintock and S.A. Watts. 1992. Levels of estradiol and progesterone in male and female Eucidaris tribuloides (Echinodermata: Echinoidea) over an annual gametogenic cycle. Florida Scientist 55:85-91.
Massey, C.B. and S.A. Watts. 1992. Patterns of sperm-specific histone variation in sea stars and sea urchins: Primary structural homologies in the N-terminal region of spermatogenic H1. J. Exp. Zool. 262:9-15.
Hines, G., S.A. Watts, P. Voogt and C.W. Walker. 1992. Androgen metabolism in somatic and germinal tissues of the sea star Asterias vulgaris. Comp. Biochem. Physiol. 102B:521-526.
Hines, G.A., S.A. Watts, S. Sower and C.W. Walker. 1992. Sex steroids in the testes, ovaries and pyloric caeca during the annual reproductive cycle of the sea star Asterias vulgaris. Gen. Comp. Endocrinol. 87:451-460.
Bishop, C.D. and S.A. Watts. 1992. A biochemical and morphometric study of growth in the stomach and intestine of the echinoid Lytechinus variegatus (Echinodermata). Marine Biology 114:459-467.
Massey, C.B. and S.A. Watts. 1993. Modified forms of histones H3 and H4 exhibit seasonal patterns in testes of the sea star Asterias vulgaris. Comp. Biochem. Physiol. 204B:181-186.
McClintock, J.B., T.S. Hopkins, K. Marion, S.A. Watts and G. Schinner. 1993. Population structure, growth and reproductive biology of the gorgonocephalid brittlestar Asteroporpa annulata. Bulletin of Marine Science 52:925-936.
Vernon, J.D., J.B. McClintock, T.S. Hopkins, S.A. Watts and K.R. Marion. 1993. Reproduction of Clypeaster ravenelii (Echinodermata: Echinoidea) in the northern Gulf of Mexico. Invert. Reprod. Devel. 24:71-78.
Bishop, C.D. and S.A. Watts. 1994. Two-stage recovery of gametogenic activity following starvation in Lytechinus variegatus Lamarck (Echinodermata: Echinoidea). J. Exp. Mar. Biol. Ecol. 177:27-36.
Walker, C.W., G.A. Hines and S.A. Watts. 1994. Mitogen-activated protooncogene expression during spermatogonial G1/S phase traverse in the sea star. In: K.G. Davey, R.E. Peter and S.S. Tobe (eds.), Perspectives in Comparative Endocrinology. National Research Council of Canada, Ottawa. pp. 636-644.
Lee, K.J. and S.A. Watts. 1994. The effect of salinity on the activity of Na,K-ATPase during chronic exposure and acute hypo- and hyperosmotic stress in brine shrimp Artemia franciscana nauplii. Physiol. Zool. 67:910-924.
Watts, S.A., K. Lee and G.B. Cline. 1994. Elevated ornithine decarboxylase activity and polyamine levels during early development in the brine shrimp Artemia franciscana. J. Exp. Zool. 270:426-431.
Bishop, C.D., K.J. Lee and S.A. Watts. 1994. A comparison of osmolality and specific ion concentrations in the regular sea urchin Lytechinus variegatus Lamarck (Echinodermata: Echinoidea) in varying salinities. Comp. Biochem. Physiol.
Watts, S.A., G.A. Hines, C. Byrum, J.B. McClintock, K.R. Marion and T.S. Hopkins. 1994. Tissue-and species-specific variations in androgen metabolism. In: Bruno David, Alain Guille, Jean-Pierre Féral and Michel Roux (eds.), "Echinoderms through Time". Proceedings of the Eighth International Echinoderm Conference, Dijon, France. A.A. Balkema, Rotterdam. pp. 155-161.
Hines, G.A., S.A. Watts, and J.B. McClintock. 1994. Biosynthesis of estrone and estradiol derivatives in the echinoid Lytechinus variegatus Lamarck. In: Bruno David, Alain Guille, Jean-Pierre Féral and Michel Roux (eds.), "Echinoderms through Time". Proceedings of the Eighth International Echinoderm Conference, Dijon, France. A.A. Balkema, Rotterdam. pp. 711-716.
McClintock, J.B., J.D. Vernon, S.A. Watts, K.R. Marion and T.S. Hopkins. 1994. Size frequency, recruitment and adult growth in the sea biscuit Clypeaster ravenelii in the northern Gulf of Mexico. In: Bruno David, Alain Guille, Jean-Pierre Féral and Michel Roux (eds.), "Echinoderms through Time". Proceedings of the Eighth International Echinoderm Conference, Dijon, France. A.A. Balkema, Rotterdam. pp. 777-781.
Hopkins, T.S., Watts, S.A., J.B. McClintock and K.R. Marion. 1994. Contrasting size demographics and arm regeneration in two population of Asteropecten articulatus. (Say) in the northern Gulf of Mexico. In: Bruno David, Alain Guille, Jean-Pierre Féral and Michel Roux (eds.), "Echinoderms through Time". Proceedings of the Eighth International Echninoderm Conference, Dijon, France. A.A. Balkema, Rotterdam. pp. 311-316.
Bryan, P.J., J.B. McClintock, S.A. Watts, K. Marion and T.S. Hopkins. 1994. Antimicrobial activity of ethanolic body-wall extracts of echinoderms from the northern gulf of Mexico. In: Bruno David, Alain Guille, Jean-Pierre Féral and Michel Roux (eds), "Echinoderms through Time". Proceedings of the Eighth International Echinoderm Conference, Dijon, France. A.A. Balkema, Rotterdam. pp. 17-23.
McClintock, J.B., S.A. Watts, K.R. Marion and T.S. Hopkins. 1995. Gonadal cycle, gametogenesis and energy allocation in two sympatric deep water sea stars with contrasting modes of reproduction. Bull. Mar. Sci. 57:442-452.
Meade, M.E., J.E. Doeller, D.W. Kraus and S.A. Watts. 1994. Heat and oxygen flux as a function of environmental PO2 in juvenile Australian crayfish, Cherax quadricarinatus. J. Exp. Zool. 270:460-466.
Lovett, D.L. and S.A. Watts. 1995. Changes in polyamine levels in response to acclimation salinity in gills of the blue crab Callinectes sapidus Rathbun. Comp. Biochem. Physiol. 110B:115-119.
Hines, G.A. and S.A. Watts. 1995. Non-steroidal chemical sex manipulation of Tilapia. J. World Aquaculture 26:98-102.
Lee, K.J., T.S. Elton, A.K. Bej, S.A. Watts and R.D. Watson. 1995. Molecular cloning of a cDNA encoding putative molt-inhibiting hormone from the blue crab, Callinectes sapidus. Biochem. Biophys. Res. Comm. 209:1126-1131.
Powell, M.L., M.E. Meade and S.A. Watts. 1995. Identification of six commercially-cultured crayfish species using total protein separation by isoelectric focusing. J. Crustacean Biol. 15:763-770.
Lee, K.J. and S.A. Watts. 1995. The effects of varying salinities on polyamine levels and their relation to Na+K+ATPase during early development in the brine shrimp Artemia fransiscana. J. Ala. Acad. Sci. 66:148-163.
Meade, M.E. and S.A. Watts. 1995. Weight gain and survival of juvenile Australian crayfish, Cherax quadricarinatus, fed formulated feeds. J. World Aquaculture 26:469-474.
Meade, M.E. and S.A. Watts. 1995. Toxicity of ammonia, nitrite, and nitrate to juvenile Australian crayfish, Cherax quadricarinatus. J. Shellfish Res. 14:341-346.
Watts, S.A., K.M. Wasson and G.A. Hines. 1995. A sexual paradox: Androgen and estrogen synthesis in the tilapia kidney. Proceedings of the Fifth International Symposium on the Reproductive Physiology of Fish, The University of Texas at Austin, July 1995. The University of Texas at Austin Press, pp. 277.
Hines, G.A., K.M. Wasson and S.A. Watts. 1995. Testicular steroidogenesis in relation to social interactions in the Nile tilapia Oreochromis niloticus. Proceedings of the Fifth International Symposium on the Reproductive Physiology of Fish, The University of Texas at Austin, July 1995. The University of Texas at Austin Press, pp. 232.
Bishop, C.D., R. Angus and S.A. Watts. 1995. The use of feather meal as a replacement for fish meal in the diet of Oreochromis niloticus fry. Bioresource Technology 54:291-295.
Watts, S.A., E.W. Yeh and R. Henry. 1996. Hypoosmotic stimulation of ornithine decarboxylase activity in the brine shrimp Artemia franciscana. J. Exp. Zool. 274:15-22.
Hines G.A., P.J. Bryan, K.M. Wasson, J.B. McClintock and S.A. Watts. 1996. Sex steroid metabolism in the Antarctic pteropod Clione antarctica. Invertebrate Biology 115:113-119.
Stuck, K., S.A. Watts and S.Y. Wang. 1996. Biochemical responses during starvation and subsequent recovery in postlarvae of the pacific white shrimp, Penaeus vannamei. Marine Biology 125:33-46.
Meade, M.E. and S.A. Watts. 1997. Patterns of growth in juvenile Australian crayfish, Cherax quadricarinatus, during nutrient deprivation and recovery. Freshwater Crayfish11: A journal of Astacology. Walter T. Momot, ed., LSU Graphic Services, pp. 403-416.
Slattery, M., G.A. Hines and S.A. Watts. (1997). Steroid metabolism in Antarctic soft corals. Polar Biology 18:76-82.
Klinger, T.S., J.B. McClintock and S.A. Watts. 1997. Activities of digestive enzymes of polar and subtropical echinoderms. Polar Biology.18: 154-157.
Powell, M.L., D.W. Kraus and S.A. Watts. 1997. Oxygen consumption in juvenile Procambarus Clarkii and Procambarus zonangulus. Freshwater Crayfish 11: A journal of Astacology. Walter T. Momot, ed., LSU Graphic Services, pp. 243-247.
Powell, M.L., K. Stuck and S.A. Watts. 1997. Differentiation of postlarvae of Penaeus aztecus and Peneaus duorarum from the Gulf of Mexico using isoelectric focusing. Gulf of Mexico Science 15(1): 40-45.
Kreider, J.L. and S.A. Watts. 1998. Behavioral (feeding) responses of the crayfish Procambarus clarkii to natural dietary items and common components of formulated crustacean feeds. Journal of Chemical Ecology 24: 91-111.
Marion, K., S.A. Watts, J.B. McClintock, G. Schinner and T.S. Hopkins. 1998.. Reproductive biology of the asteroid Astropecten articulatus. In Richard Mooi and Malcolm Telford (eds.), Echinoderms: San Francisco. Proceedings of the International Echinoderm Conference, San Francisco, California. A.A. Balkema, Rotterdam, pp. 279-284.
Wasson, K.M. and S.A. Watts. 1998. Proscar® (Finasteride) inhibits 5-reductase in the ovaries and testes of Lytechinus variegatus Lamarck (Echinodermata: Echinoidea). Comparative Physiology and Biochemistry 120:415-431.
Wasson, K.M., G.A. Hines and S.A. Watts. 1998. Synthesis of testosterone and 5a-androstanediols during nutritionally stimulated gonadal growth in Lytechinus variegatus in response to feeding. General and Comparative Endocrinology 111:197-206
Powell, M.L., H. Hammer and S.A. Watts. 1998. Observations of claw loss in two crayfish ponds. Journal of World Aquaculture 29(4):485-490.
Watts, S.A., S.A. Boettger, J.B. McClintock and J.M. Lawrence. 1998. Gonad production in the sea urchin Lytechinus variegatus fed prepared diets. Journal of Shellfish Research 17:1591-1595.
Hines, G.A., L.R. Boots, T. Wibbels and S.A. Watts. 1999. Steroid levels and steroid metabolism in relation to early gonadal development in the tilapia Oreochromis niloticus (Teleostei: Cyprinoidei). General and Comparative Endocrinology 114:235-248.
Rowell, C.B., G.C. Mair, G.A. Hines, T. Wibbels and S.A. Watts. 2000. Characterization of androstenedione and 17-estradiol metabolism during the proposed critical period of sex differentiation in the tilapia Oreochromis niloticus. In B. Norberg, O.S. Kjesbu, G.L.Taranger, E. Anderson and S.O. Stefanson (eds.), Proceedings of the 6th International Symposium of the Reproductive Physiology of Fish. Bergen Press, Norway, pp. 264.
Wasson, K.M., B. Gower, G.A. Hines and S.A. Watts. 2000. Levels of progesterone, testosterone and estradiol, and androstenedione metabolism in the gonads of Lytechinus variegatus Lamarck (Echinodermata: Echinoidea). Comparative Biochemistry and Physiology 126(2):153-165.
Wasson, K., B. Gower and S.A. Watts. 2000. Response of the ovaries and testis of Lytechinus variegatus Lamarck (Echinodermata: Echinoidea) to dietary administration of progesterone, testosterone and estradiol. Marine Biology 137(2):245-255.
Hammer, H.S., C.D. Bishop and S.A. Watts. 2000. Activities of three digestive enzymes during development in the crayfish, Procambarus clarkii Girard (Crustacea: Decapoda). Journal of Crustacean Biology 20(4):614-620.
Wasson, K.M. and S.A. Watts. 2000. Progesterone metabolism in the ovaries and testes of the echinoid Lytechinus variegatus Lamarck (Echinodermata). Comparative Biochemistry and Physiology C. 127(3):263-272.
Rowell, C.B., G.C. Mair, G. Hines, T. Wibbels and S. Watts. 2000. Characterization of androstenedione and 17 B-estradiol metabolism during the proposed critical period of sex differentiation in the tilapia, Oreochromis niloticus. In B. Norberg, O.S. Kjesbu, G.L. Taranger, E. Anderson and S.O. Stefansson (eds), Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish. Berga Press, Norway. pp. 264.
Meade, M.E. and S.A. Watts. 2000. Physiological compensation in unilateral ablated crayfish, Cherax quadricarinatus. Journal of Experimental Zoology 289(3):184-89.
Lawrence, J.M., A.L. Lawrence, S.C. McBride, S.B. George, S.A. Watts, and L.R. Plank. 2001. Developments in the use of prepared feeds in sea urchin aquaculture. World Aquaculture 32 (3), 34-39.
Watts, S.A., J. B. McClintock and J.M. Lawrence. 2001. The ecology of Lytechinus variegatus. In: The biology of edible sea urchins, J.M. Lawrence (ed.). Elsevier Press. pp. 375-394.
Wasson, K. and S.A. Watts. 2001. Reproductive endocrinology of sea urchins. In: The biology of edible sea urchins, J.M. Lawrence (ed.). Elsevier Press. pp. 43-58.
Marsh, A. and S.A. Watts. 2001. Energy metabolism and gonad development. In: The biology of edible sea urchins, J.M. Lawrence (ed.). Elsevier Press. pp. 27-42.
Henry, R.P. and S.A. Watts. 2001. Early carbonic anhydrase induction in the gills of the blue crab Callinectes sapidus, during low salinity acclimation is independent of ornithine decarboxylase activity. Journal of Experimental Zoology 289:350-358.
Rowell, C.B., G.C. Mair, G.A. Hines, T. Wibbels and S.A. Watts. 2002. Androgen metabolism in monosex populations of the nile tilapia, Oreochromis niloticus, during sex differentiation. General and Comparative Endocrinology 125, 151-162.
Rowell, C.B., S.A. Watts, T. Wibbels, G.A. Hines and G.C. Mair. 2002. Androgen and estrogen metabolism during sex differentiation in mono-sex populations of the Nile Tilapia, Oreochromis niloticus. General and Comparative Endocrinology 125:151-162.
Boettger, S.A., L.E. Thompson, S.A. Watts, J.B. McClintock and J.M. Lawrence. 2002. Episodic rainfall influences the distribution and abundance of the regular sea urchin Lytechinus variegatus in St. Andrew Bay, northern Gulf of Mexico. Gulf of Mexico Science 2002(1), 67-74.
Hofer, S.C. and S.A. Watts. 2002. Cold tolerance in genetically male Tilapia (GMT®), Oreochromis niloticus. World Aquaculture 33(2), 19-21.
Meade, M.E., D. Kraus, J. Doeller and S.A. Watts. 2002. Effects of temperature on weight gain and growth efficiencies in the Australian Cherax quadircarinatus. Journal of World Aquaculture 33(2):188-198..
Hammer, H.S., C.D. Bishop and
Hammer, B., H. Hammer, S.A.
Gibbs, V.K. and
Croll, S.L. and
Bishop, C.D. and
Powell, M.L. and S.A. Watts (in press) Activities of intermediary metabolic enzymes in the hepatopancreas and tail muscle tissues of the crayfish Procambarus clarkii and Procambarus zonangulus (Decapoda, Crustacea). Journal of World Aquaculture.
Hammer, H.S., S.A. Watts, R. Desmond, A.L. Lawrence and J.M. Lawrence (in press) The effect of dietary protein concentration on the consumption, survival, growth and production of the sea urchin Lytechinus variegatus. Aquaculture.
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