S.C. Weeks - Areas of Interest
Freshwater Crustaceans
Weeks SC, M Zofkova, and B. Knott. Limnadiid clam shrimp biogeography in Australia (Crustacea: Branchiopoda: Spinicaudata). Journal of the Royal Society of Western Australia (in press)
Duff RJ, C Benvenuto, T Branch, and SC Weeks. DNA extraction from cysts of the clam shrimp Eulimnadia texana (Crustacea, Branchiopoda, Spinicaudata). Journal of Crustacean Biology 27:154-157 .
Weeks SC, SK Reed, M Cesari, and F Scanabissi. 2006. Production of intersexes and the evolution of androdioecy in the clam shrimp Eulimnadia texana (Crustacea, Branchiopoda, Spinicaudata). Invertebrate Reproductive Development 49:113-119 .
Scanabissi F, M Cesari, SK Reed, SC Weeks. 2006.Ultrastructure of the male gonad and male gametogenesis in Eulimnadia texana (Packard, 1871)(Crustacea, Branchiopoda, Spinicaudata). Invertebrate Biology 125:117-124.
Hoeh WR, ND Smallwood, DM Senyo, EG Chapman, and SC Weeks. 2006. Evaluating the monophyly of Eulimnadia and the Limnadiinae (Branchiopoda: Spinicaudata) using DNA sequences. Journal of Crustacean Biology 26:182-192.
Weeks SC, TF Sanderson, SK Reed, M Zofkova, B Knott, U Balaraman, G Pereira, DM Senyo, WR Hoeh. 2006. Ancient Androdioecy in the Freshwater Crustacean Eulimnadia . Proceedings of the Royal Society of London, Series B 273:725-734.
Weeks, SC, RT Posgai, M Cesari, and F Scanabissi. 2005. Androdioecy inferred in the clam shrimp Eulimnadia agassizii (Spinicaudata: Limnadiidae). Journal of Crustacean Biology 25:323-328.
Duff, RJ WR Hoeh, DG Cook and SC Weeks. 2004. Isolation and characterization of thirteen polymorphic microsatellite loci from the clam shrimp Eulimnadia texana (Crustacea: Spinicaudata). Molecular Ecology Notes 4:397-399.
Weeks,
SC. 2004. Seven generations of inbreeding does not purge inbreeding
depression in the clam shrimp, Eulimnadia texana. Journal of
Evolutionary Biology 17:475-484.
Weeks, SC and RL Bernhardt. 2004. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Field estimates of inbreeding depression and relative male survival. Evolutionary Ecology Research 6:227-242.
Weeks SC, CL
Marquette, and E Latsch. 2004. Barriers to outcrossing success in the
primarily self-fertilizing clam shrimp, Eulimnadia texana (Crustacea,
Branchiopoda). Invertebrate Biology 123:146-155.
Weeks, SC and RJ Duff. 2002. A genetic comparison of different populations of clam shrimp in the genus Eulimnadia. Hydrobiologia 486:295-302.
Weeks, SC, V Marcus, R Salisbury, and D Ott. 2002. Cyst development in the conchostracan shrimp, Eulimnadia texana. Hydrobiologia 486:289-294.
Weeks, SC, J Hutchison, and N Zucker. 2002. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Do hermaphrodites need males for complete fertilization? Evolutionary Ecology 15:205-221.
Hollenbeck VG, N Zucker, W Gould and SC Weeks. 2002. Maintenance of androdioecy in the freshwater shrimp Eulimnadia texana: Sexual encounter rates and outcrossing success. Behavioral Ecology 13:561-570.
Naida Zucker, Gabriela A. Aguilar, Stephen C. Weeks, and L. Garner McCandless. 2002. Variation in reproductive cycle between selfing and outcrossing hermaphrodites in an androdioecious desert shrimp. Invertebrate Biology 121:66-72.
Weeks, SC, BR Crosser, and MM Gray. 2001. Relative fitness of two hermaphroditic mating types in the androdioecious clam shrimp, Eulimnadia texana. Journal of Evolutionary Biology 14:83-94.
Zucker, N, B Stafki and SC Weeks. 2001. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Relative longevity of males to hermaphrodites. Can. J. Zool. 79:393-401.
Medland, VL, N Zucker, and SC Weeks. 2000. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana Parker: Encounters between males and hermaphrodites are not random. Ethology 106:839-848.
Weeks, SC, BR Crosser, B Bennett, MM Gray, and N Zucker. 2000. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Variation in inbreeding depression between two populations. Evolution 54:878-887.
Weeks, SC, BR Crosser, MM Gray, JA Matweyou, and N. Zucker. 2000. Is there sperm storage in the clam shrimp Eulimnadia texana? Invertebrate Biology 119:215-221.
Weeks, SC, and N Zucker. 1999. Rates of inbreeding in the clam shrimp Eulimnadia texana. Can. J. Zool. 77:1402-1408.
Weeks, SC, V Marcus and B Crosser. 1999. Inbreeding depression in a self-compatible, androdioecious crustacean, Eulimnadia texana. Evolution 53:472-483.
Belk, D, G Mura and SC Weeks. 1998. Untangling confusion between Eubranchipus vernalis and Eubranchipus neglectus (Branchiopoda, Anostraca). Journal of Crustacean Biology, 18:147-152.
Weeks, SC and V Marcus. 1997. A survey of the branchiopod crustaceans of Ohio. Ohio Journal of Science, 97:86-89.
Marcus, V and SC Weeks. 1997. The effects of pond duration on the life history traits of an ephemeral pond crustacean, Eulimnadia texana. Hydrobiologia, 359:213-221.
Weeks, SC, V Marcus and S Alvarez. 1997. Notes on the life history of the clam shrimp Eulimnadia texana. Hydrobiologia, 359:191-197.
Sassaman C and SC Weeks. 1993. The genetic mechanism of sex determination in the Conchostracan shrimp Eulimnadia texana. The American Naturalist 141:314-328.
Weeks SC and C Sassaman . 1990. Competition in phenotypically variable and uniform populations of the tadpole shrimp Triops longicaudatus (Notostraca: Triopsidae). Oecologia 82:552-559.
Weeks SC. 1990. Life-history variation under varying degrees of intraspecific competition in the tadpole shrimp Triops longicaudatus (LeConte). Journal of Crustacean Biology 10:498-503.
Freshwater Fish
Gray, M and SC Weeks. 2001. A comparison of dietary use patterns of clonal and sexual fish (Poeciliidae: Poeciliopsis). Can. J. Fish. Aquat. Sci. 58:1313-1318.
Stockwell, CA and SC Weeks. 1999. Translocations and altered evolutionary trajectories in recently established populations of the western mosquitofish (Gambusia affinis). Animal Conservation 2:103-110.
Weeks, SC and GK Meffe. 1997. "Grandfather Effects" on offspring size in the Eastern Mosquitofish, Gambusia holbrooki. Copeia 1997:869-874.
Weeks SC. 1996. The hidden cost of reproduction: reduced energetic intake caused by spatial constraints in the body cavity. Oikos 75:345-349.
Weeks SC. 1996. A reevaluation of Red Queen model for the maintenance of sex in a clonal-sexual fish complex (Poeciliidae: Poeciliopsis). Canadian Journal of Fisheries and Aquatic Sciences 53:1157-1164.
Weeks SC and GK Meffe. 1996. Quantitative genetic and optimality analyses of life-history plasticity in the eastern mosquitofish, Gambusia holbrooki. Evolution 50:1358-1365.
Weeks SC. 1996. The hidden cost of reproduction: reduced energetic intake caused by spatial constraints in the body cavity. Oikos 75:345-349..
Meffe GK, SC Weeks, P Mulvey, and KL Kandl. 1996. Genetic differences in thermal tolerance of mosquitofish from ambient and thermally elevated ponds. Canadian Journal of Fisheries and Aquatic Sciences 52:2704-2711.
Weeks SC. 1995. Comparisons of life-history traits between clonal and sexual fish (Poeciliopsis: Poeciliidae) raised in monoculture and mixed treatments. Evolutionary Ecology 9:258-274.
Heulett ST, SC Weeks and GK Meffe. 1995. Lipid dynamics and growth relative to resource level in juvenile eastern mosquitofish (Gambusia holbrooki: Poeciliidae). Copeia 1995:97-104.
Weeks SC and OE Gaggiotti. 1993. Patterns of offspring size at birth in clonal and sexual strains of Poeciliopsis (Poeciliidae). Copeia 1993:1003-1009.
Weeks SC. 1993. Phenotypic plasticity of life-history traits in clonal and sexual fish (Poeciliopsis) at high and low densities. Oecologia 93:307-314.
Weeks SC, OE Gaggiotti, R Schenck, K Spindler, and RC Vrijenhoek. 1992. Feeding behavior in sexual and clonal strains of Poeciliopsis. Behavioral Ecology and Sociobiology 30:1-6.
Weeks SC and JM Quattro. 1991. Life-history plasticity under resource stress in a clonal fish (Poeciliidae: Poeciliopsis). Journal of Fish Biology 39:485-494.
Quattro JM and SC Weeks. 1991. Correlations of egg size and energetic content in sexual and clonal biotypes of Poeciliopsis. Journal of Fish Biology 38:331-334.
Wetherington JD, SC Weeks, KE Kotora, and RC Vrijenhoek. 1989. Genotypic and environmental components of variation in growth and reproduction of fish hemiclones (Poeciliopsis: Poeciliidae). Evolution 43:635-645.
Life-History Evolution
Stockwell, CA and SC Weeks. 1999. Translocations and altered evolutionary trajectories in recently established populations of the western mosquitofish (Gambusia affinis). Animal Conservation 2:103-110.
Weeks, SC and GK Meffe. 1997. "Grandfather Effects" on offspring size in the Eastern Mosquitofish, Gambusia holbrooki. Copeia 1997:869-874.
Weeks SC. 1996. The hidden cost of reproduction: reduced energetic intake caused by spatial constraints in the body cavity. Oikos 75:345-349.
Weeks SC and GK Meffe. 1996. Quantitative genetic and optimality analyses of life-history plasticity in the eastern mosquitofish, Gambusia holbrooki. Evolution 50:1358-1365.
Weeks SC. 1996. The hidden cost of reproduction: reduced energetic intake caused by spatial constraints in the body cavity. Oikos 75:345-349..
Weeks SC. 1995. Comparisons of life-history traits between clonal and sexual fish (Poeciliopsis: Poeciliidae) raised in monoculture and mixed treatments. Evolutionary Ecology 9:258-274.
Heulett ST, SC Weeks and GK Meffe. 1995. Lipid dynamics and growth relative to resource level in juvenile eastern mosquitofish (Gambusia holbrooki: Poeciliidae). Copeia 1995:97-104.
Weeks SC and OE Gaggiotti. 1993. Patterns of offspring size at birth in clonal and sexual strains of Poeciliopsis (Poeciliidae). Copeia 1993:1003-1009.
Weeks SC. 1993. Phenotypic plasticity of life-history traits in clonal and sexual fish (Poeciliopsis) at high and low densities. Oecologia 93:307-314.
Weeks SC and JM Quattro. 1991. Life-history plasticity under resource stress in a clonal fish (Poeciliidae: Poeciliopsis). Journal of Fish Biology 39:485-494.
Quattro JM and SC Weeks. 1991. Correlations of egg size and energetic content in sexual and clonal biotypes of Poeciliopsis. Journal of Fish Biology 38:331-334.
Weeks SC. 1990. Life-history variation under varying degrees of intraspecific competition in the tadpole shrimp Triops longicaudatus (LeConte). Journal of Crustacean Biology 10:498-503.
Evolution of Reproduction Systems
Weeks SC, SK Reed, M Cesari, and F Scanabissi. 2006. Production of intersexes and the evolution of androdioecy in the clam shrimp Eulimnadia texana (Crustacea, Branchiopoda, Spinicaudata). Invertebrate Reproductive Development 49:113-119 .
Scanabissi F, M Cesari, SK Reed, SC Weeks. 2006.Ultrastructure of the male gonad and male gametogenesis in Eulimnadia texana (Packard, 1871)(Crustacea, Branchiopoda, Spinicaudata). Invertebrate Biology 125:117-124.
Weeks SC, C Benvenuto, and SK Reed. 2006. When males and hermaphrodites coexist: A review of androdioecy in animals. Integrative and Comparative Biology 46:449-464 (http://icb.oxfordjournals.org/cgi/content/abstract/icj048v1).
Weeks SC, TF Sanderson, SK Reed, M Zofkova, B Knott, U Balaraman, G Pereira, DM Senyo, WR Hoeh. 2006. Ancient Androdioecy in the Freshwater Crustacean Eulimnadia . Proceedings of the Royal Society of London, Series B 273:725-734.
Weeks, SC, RT Posgai, M Cesari, and F Scanabissi. 2005. Androdioecy inferred in the clam shrimp Eulimnadia agassizii (Spinicaudata: Limnadiidae). Journal of Crustacean Biology 25:323-328.
Weeks,
SC. 2004. Seven generations of inbreeding does not purge inbreeding
depression in the clam shrimp, Eulimnadia texana. Journal of
Evolutionary Biology 17:475-484.
Weeks, SC and RL Bernhardt. 2004. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Field estimates of inbreeding depression and relative male survival. Evolutionary Ecology Research 6:227-242.
Weeks
SC, CL Marquette, and E Latsch. 2004. Barriers to outcrossing success in
the primarily self-fertilizing clam shrimp, Eulimnadia texana
(Crustacea, Branchiopoda). Invertebrate Biology 123:146-155.
Hollenbeck VG, N Zucker, W Gould and SC Weeks. 2002. Maintenance of androdioecy in the freshwater shrimp Eulimnadia texana: Sexual encounter rates and outcrossing success. Behavioral Ecology 13:561-570.
Weeks, SC, J Hutchison, and N Zucker. 2002. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Do hermaphrodites need males for complete fertilization? Evolutionary Ecology 15:205-221.
Naida Zucker, Gabriela A. Aguilar, Stephen C. Weeks, and L. Garner McCandless. 2002. Variation in reproductive cycle between selfing and outcrossing hermaphrodites in an androdioecious desert shrimp. Invertebrate Biology 121:66-72.
Zucker, N, B Stafki and SC Weeks. 2001. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Relative longevity of males to hermaphrodites. Can. J. Zool. 79:393-401.
Medland, VL, N Zucker, and SC Weeks. 2000. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana Parker: Encounters between males and hermaphrodites are not random. Ethology 106:839-848.
Gray, M and SC Weeks. 2001. A comparison of dietary use patterns of clonal and sexual fish (Poeciliidae: Poeciliopsis). Can. J. Fish. Aquat. Sci. 58:1313-1318.
Zucker, N, B Stafki and SC Weeks. 2001. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Relative longevity of males to hermaphrodites. Can. J. Zool. 79:393-401.
Weeks, SC, BR Crosser, and MM Gray. 2001. Relative fitness of two hermaphroditic mating types in the androdioecious clam shrimp, Eulimnadia texana. Journal of Evolutionary Biology 14:83-94.
Medland, VL, N Zucker, and SC Weeks. 2000. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana Parker: Encounters between males and hermaphrodites are not random. Ethology 106:839-848.
Weeks, SC, BR Crosser, B Bennett, MM Gray, and N Zucker. 2000. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Variation in inbreeding depression between two populations. Evolution 54:878-887.
Weeks, SC, BR Crosser, MM Gray, JA Matweyou, and N. Zucker. 2000. Is there Sperm Storage in the Clam Shrimp Eulimnadia texana? Invertebrate Biology 119:215-221.
Weeks, SC, and N Zucker. 1999. Rates of Inbreeding in the Clam Shrimp Eulimnadia texana. Can. J. Zool. 77:1402-1408.
Weeks, SC, V Marcus and B Crosser. 1999. Inbreeding Depression in a Self-Compatible, Androdioecious Crustacean, Eulimnadia texana. Evolution 53:472-483.
Weeks SC. 1996. A reevaluation of Red Queen model for the maintenance of sex in a clonal-sexual fish complex (Poeciliidae: Poeciliopsis). Canadian Journal of Fisheries and Aquatic Sciences 53:1157-1164.
Weeks SC. 1995. Comparisons of life-history traits between clonal and sexual fish (Poeciliopsis: Poeciliidae) raised in monoculture and mixed treatments. Evolutionary Ecology 9:258-274.
Weeks SC. 1993. The effects of recurrent clonal formation on clonal invasion patterns and sexual persistence: A Monte Carlo simulation of the frozen niche-variation model. The American Naturalist 141:409-427.
Weeks SC, OE Gaggiotti, R Schenck, K Spindler, and RC Vrijenhoek. 1992. Feeding behavior in sexual and clonal strains of Poeciliopsis. Behavioral Ecology and Sociobiology 30:1-6.
Weeks SC and C Sassaman . 1990. Competition in phenotypically variable and uniform populations of the tadpole shrimp Triops longicaudatus (Notostraca: Triopsidae). Oecologia 82:552-559.
Wetherington JD, SC Weeks, KE Kotora, and RC Vrijenhoek. 1989. Genotypic and environmental components of variation in growth and reproduction of fish hemiclones (Poeciliopsis: Poeciliidae). Evolution 43:635-645.
Evolution of Sex Determining Mechanisms
Sassaman C and SC Weeks. 1993. The genetic mechanism of sex determination in the Conchostracan shrimp Eulimnadia texana. The American Naturalist 141:314-328.
Weeks SC and C Benvenuto. Mate guarding in the androdioecious clam shrimp Eulimnadia texana: male assessment of hermaphrodite receptivity. Ethology (submitted).
Weeks SC, CL
Marquette, and E Latsch. 2004. Barriers to outcrossing success in the
primarily self-fertilizing clam shrimp, Eulimnadia texana (Crustacea,
Branchiopoda). Invertebrate Biology 123:146-155.
Hollenbeck VG, N Zucker, W Gould and SC Weeks. 2002. Maintenance of androdioecy in the freshwater shrimp Eulimnadia texana: Sexual encounter rates and outcrossing success. Behavioral Ecology 13:561-570.
Naida Zucker, Gabriela A. Aguilar, Stephen C. Weeks, and L. Garner McCandless. 2002. Variation in reproductive cycle between selfing and outcrossing hermaphrodites in an androdioecious desert shrimp. Invertebrate Biology 121:66-72.
Zucker, N, B Stafki and SC Weeks. 2001. Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: Relative longevity of males to hermaphrodites. Can. J. Zool. 79:393-401.
Medland, VL, N
Zucker, and SC Weeks. 2000. Maintenance of androdioecy in the freshwater
shrimp, Eulimnadia texana Parker: Encounters between males and
hermaphrodites are not random. Ethology 106:839-848.
Evolution of Senescence
Marcus, V and SC Weeks. 1997. The effects of pond duration on the life history traits of an ephemeral pond crustacean, Eulimnadia texana. Hydrobiologia, 359:213-221.
Wood JW, SC Weeks, GR Bentley and KM Weiss. 1994. Human population biology and the evolution of aging. Pp. 19-75 in: Crews DE and RM Garruto (eds.) Biological Anthropology and Aging. Perspectives on Human Variation Over the Life Span. Oxford University Press, New York, NY.
Connor A, KM Weiss and SC Weeks. 1993. Evolutionary models of quantitative disease risk factors. Human Biology 65:917-940.
E-mail address : SCWeeks@uakron.edu.