Evolution and Maintenance of Sexual Reproduction

Calabrese, A. and S.C. Weeks. 2022. Testing a behavioral model for the maintenance of androdioecy as a result of sexual conflict in the clam shrimp Eulimnadia dahli. Ethology 128:331-338

Astrop, T.I., L. Park-Boush and S.C. Weeks. 2020. Testing Weissman’s lineage selection model for the maintenance of sex: The evolutionary dynamics of clam shrimp reproduction over geologic time. Zoological Studies 59:16.

Calabrese, A. and S.C. Weeks. 2018. Are all-hermaphroditic populations of Eulimnadia

texana Packard, 1871 (Branchiopoda: Spinicaudata) resistant to invasion? Implications for the maintenance of androdioecy. Journal of Crustacean Biology (in press).

Baldwin-Brown, J.G., S.C. Weeks and A.D. Long. 2018. A new standard for crustacean genomes: the highly contiguous, annotated genome assembly of the clam shrimp Eulimnadia texana reveals HOX gene order and identifies the sex chromosome. Genome Biology and Evolution 10:143-156. (Also noted inBioRxiv doi: https://doi.org/10.1101/222869)

Weeks, SC, C. Benvenuto, SK Reed, RJ Duff, and ZH Duan. 2014. A field test of a model for the stability of androdioecy in the freshwater shrimp, Eulimnadia texana. Journal of Evolutionary Biology 41:251-261.

Weeks, SC, JS Brantner, TI Astrop, DW Ott and N Rabet. 2014. The evolution of hermaphroditism from dioecy in crustaceans: Selfing hermaphroditism described in a fourth Spinicaudatan genus. Evolutionary Biology 41:251-261. DOI 10.1007/s11692-013-9265-0.

Brantner, J. S. , D. W. Ott, R. J. Duff, L-O Sanoamuang, GP Simhachalam, KK Subhash Babu, and SC Weeks. 2013. Androdioecy and Hermaphroditism in Five Species of Clam shrimp (Crustacea: Branchiopoda: Spinicaudata) From India and Thailand. Invert. Biol. 132:27-37.

Brantner, J. S. , D. W. Ott, R. J. Duff, J.I. Orridge, J. R. Waldman and S.C. Weeks. 2013. Evidence of selfing hermaphroditism in the clam shrimp Cyzicus gynecia (Branchiopoda, Spinicaudata). J. Crust. Biol. 33:184-190.

Weeks, S.C. 2012. The role of androdioecy and gynodioecy in mediating evolutionary transitions between dioecy and hermaphroditism in the Animalia. Evolution 66:3670-3686

Weeks, SC, C Benvenuto, TF Sanderson, and RJ Duff. 2010. Sex Chromosome Evolution in the Clam Shrimp, Eulimnadia texana. J. Evol. Biol. 23:1100-1106.

Weeks, SC, EG Chapman, DC Rogers, DM Senyo, and WR Hoeh. 2009. Evolutionary transitions among dioecy, androdioecy and hermaphroditism in limnadiid clam shrimp (Branchiopoda: Spinicaudata). J. Evol. Biol. 22:1781-1799.

Weeks, SC, SK Reed, DW Ott, and F. Scanabissi. 2009. Inbreeding effects on sperm production in clam shrimp (Eulimnadia texana). Evol. Ecol. Res. 11:125-134.

Weeks, SC. 2009. Can males successfully invade hermaphroditic populations of clam shrimp (Eulimnadia texana)? Current Science 96:98-102.

Weeks SC, TF Sanderson, M Zofkova, and B Knott. 2008. Breeding systems in the clam shrimp family Limnadiidae. Invertebrate Biology 127:336-349.

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.

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.

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.