Prof. Berta Levavi-Sivan

Fish Reproduction

Publications in Google Scholar

A statement of research interests:

Illumination of the mechanisms underlying hypothalamic regulation in fish.

kisspeptin/kisspeptin receptor system and puberty in fish.

The relationship between growth and reproduction in fish.

Production of recombinant gonadotropins using the expression system of Pichia pastoris.

Introduction of new fish species to Israeli aquaculture.

Sex inversion in fish.

Aquaculture in Third World Countries.




Curriculum Vitae

Short biography:

  • 1979 - 1983 B.Sc. Tel-Aviv University, Life Science
  • 1983 - 1986 M.Sc. Tel Aviv University, Dept. of Zoology
  • 1986 - 1993 Ph.D. Tel-Aviv University, Dept. of Zoology
  • 1995 - 1999 Post-Doc. Weizmann Institute. Dept. of Immunology
  • 1999 - 2005 Lecturer, Animal Sciences, Faculty of Agriculture, Hebrew University
  • 2005 - 2007 Senior lecturer, Animal Sciences, Faculty of Agriculture, Hebrew University
  • 2007 - present Associate Professor, Animal Sciences, Faculty of Agriculture, Hebrew University

List of Publications


  1. Levavi-Zermonsky B. Yaron Z. 1986. Changes in gonadotropin and ovarian steroids associated with oocyte maturation during spawning induction in the carp. General and Comparative Endocrinology, 62: 89-98. doi: 10.1016/0016-6480(86)90097-3
  2. Yaron Z. Levavi-Zermonsky B. 1986. Fluctuations in GTH and ovarian steroids during the annual cycle and spawning of the common carp. Fish Physiology Biochemistry, 2: 75-86. doi: 10.1007/BF02264075
  3. Levavi-Sivan B. Yaron Z. 1989. Gonadotropin secretion from perifused tilapia pituitary in relation to gonadotropin-releasing hormone, extracellular calcium, and protein kinase C. General Comparative Endocrinology, 75: 187-194. doi: 10.1016/0016-6480(89)90070-1
  4. Yaron Z.  Levavi-Sivan B. 1990. Intracellular events associated with GnRH and dopamine effects on GTH secretion in tilapia. Progress in Clinical and Biology Research, 342, 409-414. doi: 10.1007/BF00004550
  5. Rothbard S. Zohar Y. Zmora N. Levavi-Sivan B. Moav B. Yaron. Z. 1990. Clearance of 17β-ethynyltestosterone from muscle of sex-inversed tilapia hybrids treated for growth enhancement with two doses of the androgen. Aquaculture, 89: 365-376. doi:10.1016/0044-8486(90)90139-E
  6. Gissis A. Levavi-Sivan B. Rubin-Kedem H. Ofir M. Yaron Z. 1991. The effect of gonadotropin releasing hormone superactive analog and dopamine antagonists on gonadotropin level and ovulation in tilapia hybrids. The Israeli Journal of Aquaculture - Bamidgeh, 43: 123-136.
  7. Levavi-Sivan B. Yaron Z. 1992. Involvement of cyclic adenosine monophosphate in the stimulation of gonadotropin secretion from the pituitary of the teleost fish, tilapia. Molecular and Cellular Endocrinology, 85: 175-182. doi: 10.1016/0303-7207(92)90256-6
  8. Levavi-Sivan B. Yaron Z. 1993. Intracellular mediation of GnRH action on GTH release in tilapia. Fish Physiology Biochemistry, 11: 51-59. doi: 10.1007/BF00004550
  9. Drori S. Ofir M. Levavi-Sivan B. Yaron Z. 1994. Spawning induction in common carp (Cyprinus carpio) using pituitary extract or GnRH superactive analogue combined with metoclopramide: analysis of hormone profile, progress of oocyte maturation and dependence on temperature. Aquaculture, 119: 393-407. doi:10.1016/0044-8486(94)90303-4
  10. Cavari B.Z. Lebail P.Y. Levavi-Sivan B. Melamed P. Kawauchi H. Funkestein B. 1994. Isolation of GH and in vivo translation of mRNA isolation from pituitaries of the giltead seabream Sparus aurata. General and Comparative Endocrinology, 95: 321-330. doi: 10.1006/gcen.1994.1129
  11. Yaron Z., Levavi-Sivan B., Drori S. Rothbard S. 1994. The endocrine regulation of the reproduction system. In: "The Carp". (G. Wholfarte, and G. Hulata Eds.) pp: 34-66 (in Hebrew).
  12. Melamed P. Eliahu N. Sivan B. Ofir M. Pisanty-Farhi O. Rentier-Delrue F. Smal J. Yaron Z. Naor Z. 1995. Hypothalamic and thyroidal regulation of growth hormone in tilapia. General and Comparative Endocrinology, 97: 13-30. doi: 10.1006/gcen.1995.1002
  13. Levavi-Sivan B. Ofir M. Yaron Z. 1995. Possible sites of dopaminergic inhibition of gonadotropin release from the pituitary of a teleost fish, tilapia. Molecular and Cellular Endocrinology, 109: 87-95. doi: 10.1016/0303-7207(95)03488-S
  14. Melamed P. Eliahu N. Ofir M. Levavi-Sivan B. Smal J. Rentier-Delrue F.  Yaron Z. 1995. The effects of gonadal development and sex steroids on growth hormone secretion in the male tilapia hybrid (Oreochromis niloticus X O. aureus). Fish Physiology and Biochemistry, 14: 267-277. doi: 10.1007/BF00004065
  15. Melamed P. Gur G. Elizur A. Rosenfeld H. Levavi-Sivan B. Rentier-Delrue F. Yaron Z. 1996. Differential effects of gonadotropin releasing hormone, dopamine and somatostatin and their second messengers on the mRNA levels of gonadotropin IIβ subunit and growth hormone in the teleost fish, tilapia. Neuroendocrinology, 64: 320-328. doi:10.1159/000127135
  16. Poncelet A.C. Levavi-Sivan B. Muller M. Yaron Z. Martial J. A. Belayew A. 1996. The tilapia prolactin I gene evolutionary conservation of the regulatory elements directing pituitary-specific expression. DNA and Cell Biology. 15: 679-692. doi:10.1089/dna.1996.15.679
  17. Poncelet A.C., Yaron Z., Levavi-Sivan B., Martial J.A. and Muller M. 1996. Regulation of prolactin gene expression in fishes. In: "Recent Advances in Marine Biotechnology" (R. Nagabhushanan, M.F. Thompson and M. Fingerman, Eds.). Oxford and IBH New Delhi, pp. 383-405.
  18. Rothbard S. Levavi-Sivan B. Yaron Z. 1997. Breeding behavior and the associated taGTH and steroids levels in female Nile Oreochrommis niloticus. Poland Archive of Hydrobiology, 44: 83-92.
  19. Jensen B.S. Levavi-Sivan B. Fishburne C.S. Fuchs S. 1997. Functional expression of the murine D2, D3 and D4 dopamine receptors in Xenopus laevis oocytes. FEBS letters, 420, 191-195. doi: 10.1016/S0014-5793(97)01505-6
  20. Rosenfeld H. Levavi-Sivan B. Melamed P. Yaron Z. Elizur A. 1997. The GTHβ subunits of tilapia: gene cloning and expression. Fish Physiology and Biochemistry, 17: 85-92.
  21. Rosenfeld H. Levavi-Sivan B. Melamed P. Yaron Z. Elizur A. 1998. The genes encoding the GtHβ subunits in tilapia. Annals New York Academy of Science, 839: 455-457. doi: 10.1111/j.1749-6632.1998.tb10832.x
  22. Yaron Z. Levavi-Sivan B. Melamed P. Rosenfeld H. Elizur A. 1998. Second messengers involved in the response of GtH cells in fish: GtH release and GtH IIβ mRNA levels. Annals New York Academy of Science.  839: 254-259. doi: 10.1111/j.1749-6632.1998.tb10770.x
  23. Mauger C. Sivan B. Brockhaus M. Fuchs S. Civelli. Monsma F.Jr. 1998. Development and characterization of anti-peptide antibodies against the mouse D4 dopamine receptor. European Journal of Neuroscience, 10: 529-537. doi:10.1046/j.1460-9568.1998.00056.x
  24. Levavi-Sivan B. Park B.-H. Fuchs S.  Fishburn C.S. 1998. Endogenous expression of the human D3 dopamine receptor in the medulloblastoma cell line TE671: Cross-talk between D1 and D3 receptors. FEBS Letters, 439: 138-142. doi: 10.1016/S0014-5793(98)01356-8
  25. Obadiah J. Avidor-Reiss T. Fishburn C.S. Carmon S. Bayewitch M. Vogel Z. Fuchs S.. Levavi-Sivan B. 1999. Adenylyl cyclase interaction with the D2 dopamine receptor family; differential coupling to Gi, Gz and Gs. Cellular and Molecular Neurobiology, 19: 653-664. doi: 10.1023/A:1006988603199
  26. Yaron Z. Gur G. Melamed P. Rosenfeld H. Levavi-Sivan B. Elizur A.  2001. Regulation of gonadotropin subunit genes in tilapia. Comparative Biochemistry and Physiology B. 129B: 489-502. doi:10.1016/S1096-4959(01)00345-1
  27. Rosenfeld H. Levavi-Sivan B. Gur G. Melamed P. Meiri I. Yaron Z. Elizur A. 2001. Characterization of the tilapia FSHβ gene and analysis of its 5` flanking region.  Comparative Biochemistry and Physiology B., 129B: 389-398. doi10.1016/S1096-4959(01)00331-1
  28. Ilani T. Fishburn C.S. Levavi-Sivan B. Carmon S. Raveh L. Fuchs S. 2002. Coupling of dopamine receptors to G protein: Studies with chimeric D2/D3 dopamine receptors. Cellular Molecular Neurobiology, 22: 47-56. doi:
  29. Francis G.  Avitan A.  Levavi-Sivan B. Becker K.. 2002. Effects of long term feeding of Quillaja saponins on sex ratio, growth, muscle and serum cholesterol and LH levels in Nile tilapia (Oreochromis niloticus (L.)).  Comparative Biochemistry and Physiology C, 133: 593-603. doi: : 10.1016/S1532-0456(02)00167-9
  30. Yaron Z. Gur G. Rosenfeld H. Levavi-Sivan B. 2002. Spawning induction in fish and GnRH regulation of gonadotropins: modes of action. Fisheries Science, 68: 661-666. doi:10.2331/fishsci.68.sup1_661
  31. Yaron Z. Gur G. Melamed P. Rosenfeld H. Elizur A. Levavi-Sivan B. 2003. Regulation of fish gonadotropins. International Review of Cytology, 225: 131-185. doi:10.1016/S0074-7696(05)25004-0
  32. Lubzenz E. Lissauer L. Levavi-Sivan B. Avarre J.-C. Sammar M. 2003. Carotenoid and retinoid transport to fish oocytes and eggs: What is the role of Retinol Binding Protein? Molecular Aspects of Medicine. 24: 441-57. doi:10.1016/S0098-2997(03)00040-2
  33. Levavi-Sivan B. Avitan A. Kanias T. 2003. Characterization of the inhibitory dopamine receptor from the pituitary of tilapia. Fish Physiology and Biochemistry. 28: 73-75. doi:10.1023/B:FISH.0000030479.47055.24
  34. Funkenstein B. Dyman A. Levavi-Sivan B. Tom M. 2004. Application of real-time PCR for quantitative determination of hepatic vitellogenin transcript levels in the striped seabream, lithognathus mormyrus. Marine Environmental Research. 58: 659-663. doi:10.1016/j.marenvres.2004.03.058
  35. Levavi-Sivan B. Vaiman R. Sachs O. Tchori I.  2004. Spawning induction and hormonal levels during final oocyte maturation in the silver perch (Bidyanus bidyanus). Aquaculture, 12: 419-431. doi:
  36. Levavi-Sivan B. Safarian H. Rosenfeld H. Elizur A. Avitan A. 2004. Regulation of GnRH receptor gene expression in tilapia: effect of GnRH and dopamine. Biology of Reproduction. 70: 1545-1551. doi:
  37. Pikarsky E. Ronen A. Abramowitz J. Levavi-Sivan B. Hutoran M. Shapira Y. Steinitz M. Perelberg A. Soffer D. Kotler M. 2004. Pathogenesis of acute viral disease induced in fish by carp interstitial nephritis and gill necrosis virus. Journal of Virology. 78: 9544-9551. doi: 10.1128/JVI.78.17.9544-9551.2004
  38. Hurvitz A. Degani G. Goldberg D. Yom Din S. Jackson K. Levavi-Sivan B. 2005. Cloning of FSHβ, LHβ and α subunits from the Russian sturgeon (Acipenser gueldenstaedtii), β subunits mRNA expression and gonad development during the first stages of growth. General and Comparative Endocrinology 140: 61-73. doi:10.1016/j.ygcen.2004.09.019
  39. Levavi-Sivan B. 2004. Fish Reproduction. In: “Agriculture of Domestic Animals” (E. Gootwine Ed.) Israeli Ministry of Education. (In Hebrew), pp 150-172.
  40. Kasuto H.  Levavi-Sivan B. 2005. Production of biologically active tethered tilapia LHβα by the methyllotropic yeast Pichia pastoris.  General and Comparative Endocrinology, 140: 222-232. doi:10.1016/j.ygcen.2004.10.016
  41. Shapira Y. Magen Y. Zak T. Kotler M. Hulata G.  Levavi-Sivan B. 2005 Differential resistance to Koi Herpes Virus (KHV) among strains and crossbreds of common carp (Cyprinus carpio L.).  Aquaculture, 245: 1-11. doi:10.1016/j.aquaculture.2004.11.038
  42. Levavi-Sivan B. Bloch CL. Gutnick M.J. Fleidervish IA. 2005. Electrotonic coupling in the anterior pituitary of a teleost fish. Endocrinology, 146: 1048-1052. doi:10.1210/en.2004-1415
  43. Levavi-Sivan B. Avitan A. 2005. Sequence analysis, endocrine regulation and signal transduction of GnRH receptors in teleost fish. General and Comparative Endocrinology, 142, 67-73. doi: 10.1016/j.ygcen.2005.01.019
  44. Aizen J. Meiri I. Tzchori I. Levavi-Sivan B. Rosenfeld H. 2005.  Enhancing spawning in the grey mullet (Mugil cephalus) by removal of dopaminergic inhibition. General and Comparative Endocrinology, 142: 212-221. doi:10.1016/j.ygcen.2005.01.002
  45. Levavi-Sivan B. Hedvat R. Kanias T. Francis G. Becker K.  Kerem Z. 2005. Exposure of tilapia pituitary cells to saponins: Insight into their mechanism of action. Comparative Biochemistry and Physiology C. 40: 79-86. doi: 10.1016/j.cca.2005.01.002
  46. Levavi-Sivan B. Aizen J. Avitan A. 2005. Cloning, characterization and expression of the D2 dopamine receptor from the tilapia pituitary. Molecular and Cellular Endocrinology.  236, 17-30. doi:10.1016/j.mce.2005.03.010
  47. Ronen A. Perlberg A. Hutran M. Shapira Y. Steinitz M. Levavi-Sivan B. Pikarsky, E. Kotler M. 2005. Prevention of a mortal disease of carps induced by the Carp Interstitial Nephritis and Gill Necrosis Virus (CNGV) in Israel. Bulletin of Fisheries Research Agency. 2, 9-11.
  48. Nocillado J.N. Levavi-Sivan B. Avitan A. Carrick F. Elizur A.  2005. Isolation of dopamine D2 receptor (D2R) promoters in Mugil cephalus. Fish Physiology and Biochemistry. 31, 149-152. doi: 10.1007/s10695-006-0017-2
  49. Yaron Z. and Levavi-Sivan B.  2006. “Fish Reproduction”. In: “Physiology of Fishes” 3rd edition, (D.H. Evans Ed.). CRC, New York. 343-386.
  50. Jackson K. Hurvitz A. Yom Din S. Goldberg D. Pearlson O. Degani G. Levavi-Sivan, B. 2006. Anatomical, hormonal and histological descriptions of captive Russian sturgeon (Acipenser gueldenstaedtii) with intersex gonads. General and Comparative Endocrinology 148, 359-367. doi:10.1016/j.ygcen.2006.04.008
  51. Levavi-Sivan B. Biran J. Fireman E. 2006. Sex steroids are involved in the regulation of gonadotropin-releasing hormone and dopamine D2 receptors in female tilapia pituitary. Biology of Reproduction. 75, 642–650. doi: 10.1095/biolreprod.106.051540
  52. Yaron Z. and Levavi-Sivan B.  2006. “Fish Reproduction”. In: “Physiology of Fishes” 3rd edition, (D.H. Evans Ed.). CRC, New York. 343-386.
  53. Nocillado JN. Elizur A. Avitan A. Carrick F. Levavi-Sivan B. 2007.  Cytochrome P450 aromatase in grey mullet: cDNA and promoter isolation and brain, pituitary and ovarian expression during puberty. Molecular and Cellular Endocrinology 263, 65-78. doi: 10.1016/j.mce.2006.08.013
  54. Nocillado JN. Levavi-Sivan B. Carrick F.  Elizur A. 2007. Temporal expression of G-protein-coupled receptor 54 (GPR54), gonadotropin-releasing hormones (gnrh), and dopamine receptor D2 (drd2) in pubertal female grey mullet, Mugil cephalus. General and Comparative Endocrinology. 150, 278-287. doi:10.1016/j.ygcen.2006.09.008
  55. Aizen J. Kasuto H. Golan M. Zakay H. Levavi-Sivan B. 2007. Tilapia follicle stimulating hormone (FSH): Immunochemistry, stimulation by GnRH and Effect of biologically active recombinant FSH on steroid secretion. Biology of Reproduction. 76, 692–700. doi:10.1095/biolreprod.106.055822
  56. Yom Din S. Hurvitz A. Goldberg D. Jackson K. Levavi-Sivan B. Degani G. 2008. Cloning of Russian sturgeon (Acipenser gueldenstaedtii) growth hormone and insulin-like growth factor 1 and their expression in male and female fish during the first period of growth. Journal of Endocrinological Investigation, 31, 201-10. doi:10.1007/BF03345591
  57. Perdikaris C., Levavi-Sivan B. Chantzaropoulos A. Nathanailides C. Gouva E.   Paschos E. 2007. Pituitary collection from gibel carp Carassius gibelio (Bloch 1783) in Lake Pamvotis (NW Greece) and prospects for future use in carp reproduction. Israeli Journal of Aquaculture, 59, 162-167. doi:
  58. Avitan A, Zelinger E Levavi-Sivan B. 2007. Homologous desensitization and visualization of the tilapia GnRH type 3 receptor. General and Comparative Endocrinology, 153, 182-188. doi:10.1016/j.ygcen.2007.04.003
  59. Aizen J, Kasuto H. Levavi-Sivan B. 2007. Development of specific enzyme-linked immunosorbent assay for determining LH and FSH levels in tilapia, using recombinant gonadotropins. General and Comparative Endocrinology, 153, 323-332. doi: 10.1016/j.ygcen.2007.04.004
  60. Hurvitz A., Jackson K., Degani G. Levavi-Sivan B. 2007. Use of endoscopy for gender and Ovarian-Stage Determinations in Russian sturgeon (Acipenser gueldenstaedtii) Grown in Aquaculture Conditions. Aquaculture, 270, 158-166. doi: 10.1016/j.aquaculture.2007.05.020
  61. Qutob M, Dweik H., Shihab S., Abu-lafi S., Levavi-Sivan B., Kerem Z., Francis G., Focken U. Becker K. 2007. Utilization of local feeds resources and available agricultural residues from the Palestinian region for tilapia feeding. Egypt. Journal Aquaculture Biology & Fisheries 11: 185-191.
  62. Levy-Lior A. Pokroy B. Levavi-Sivan B. Leiserowitz L Weiner S. Addadi L. 2008. Biogenic guanine crystals from the skin of fish maybe designed to enhance light reflectance. Crystal Growth and Design. 8, 507–511. doi: 10.1021/cg0704753
  63. Yacobovitz M, Solomon G, Gusakovsky E.E, Levavi-Sivan B. Gertler A. 2008.  Purification and characterization of pufferfish (Takifugu rubripes) leptin. General and Comparative Endocrinology, 156, 83–90. doi:10.1016/j.ygcen.2007.11.013
  64. Cohen A. Shmoish M. Levi L. Cheruti U. Levavi-Sivan B. Lubzens E. 2008. Alterations in micro-ribonucleic acid expression profiles reveal a novel pathway for estrogen regulation. Endocrinology. 149,1687-96. doi:10.1210/en.2007-0969
  65. Levi L. Levavi-Sivan B.  Lubzens E. 2008. Expression of genes associated with retinoid metabolism in the trout ovarian follicle. Biology of Reproduction. 79, 570-577. doi:10.1095/biolreprod.107.066548 
  66. Golan M. Avitan A. Qutob M. Dweik H. Abu-Lafi S. Focken U.  Francis G. Becker K. Kerem Z. & Levavi-Sivan.B. 2008. Quillaja saponins inhibit tilapia aromatase activity in vitro.  CYBIUM, International Journal of Ichthyology. 32, 80-82.
  67. Levavi-Sivan, B., Golan, M., Aizen. J., & Elizur, A. 2008. Fish recombinant gonadotropins. CYBIUM, International Journal of Ichthyology. 32, 17-21.
  68. Hurvitz A, Jackson, K., Yom-Din, S., Degani, G., & Levavi-Sivan, B. 2008. Sexual development in Russian sturgeon (Acipenser gueldenstaedtii) grown in aquaculture. CYBIUM, International Journal of Ichthyology. 32, 283-285.
  69. Biran J. Ben-Dor S. Levavi-Sivan B. 2008. Molecular identification and functional characterization of the kisspeptin/kisspeptin receptor system in lower-vertebrates. Biology of Reproduction. 79,776–786. doi:10.1095/biolreprod.107.066266
  70. Ezagouri M. Yom-Din S. Goldberg D. Jackson K.  Levavi-Sivan B. Degani G. 2008. Expression of the two cytochrome P450 aromatase genes in the male and female blue gourami (Trichogaster trichopterus) during the reproductive cycle. General and Comparative Endocrinology. 159, 208–213. doi: 10.1016/j.ygcen.2008.08.009
  71. Levi L. Pekarski I. Gutman E. Fortina P. Hyslop T. Biran J. Levavi-Sivan B.  Lubzens E. 2009. Revealing genes associated with vitellogenesis in the liver of the zebrafish (Danio rerio) by transcriptome profiling. BMC Genomics, 10,141-157. doi:10.1186/1471-2164-10-141
  72. Yaron Z. Bogomolnaya, A. Drori, S. Biton, I, Aizen, J., Kulikovsky, Z. and Levavi-Sivan, B. 2009. Spawning induction in the carp: past experience and future prospects – a review. Israeli Journal of Aquaculture. 61,5–26. doi:
  73. Cnaani A. Levavi-Sivan B. 2009. Sexual development in fish, practical applications for aquaculture. Sexual Development. 3,164-75. doi:10.1159/000223080
  74. Levavi-Sivan B. Bogerd J. Mañanós EL. Gómez A.  Lareyre JJ. 2010. Perspectives on fish gonadotropins and their receptors. General and Comparative Endocrinology. 165, 412–437. Review. doi:10.1016/j.ygcen.2009.07.019
  75. Maruska K. Levavi-Sivan B. Biran J. Fernald RD.  2011. Plasticity of the reproductive axis caused by social status change in an African cichlid fish: I. pituitary gonadotropins. Endocrinology 152,281-290. doi: 10.1210/en.2010-0875
  76. Yaron, Z. Levavi-Sivan B. 2011 Encyclopedia of Fish Physiology — From Genome to Environment. Hormonal control of reproduction and growth | endocrine regulation of fish reproduction. Pages 1500–1508. doi:10.1016/B978-0-1237-4553-8.00058-7
  77. Levi L.  Ziv T. Admon A. Levavi-Sivan B.  Lubzens E. 2012. Insight into molecular pathways of retinal metabolism, associated with vitellogenesis in zebrafish. American Journal of  Physiology - Endocrinology and Metabolism. 302,E626-44. doi:10.1152/ajpendo.00310.2011
  78. Zmora N.  Zulperi Z. Stubblefield J. Biran J. Levavi-Sivan B. Munoz Cueto J. Zohar Y. 2012. Differential and gonad stage- dependent roles of kisspeptin1 and kisspeptin2 in reproduction in the modern teleosts, Morone species. Biology of Reproduction. 86,1-12. doi: 10.1095/biolreprod.111.097667
  79. Aizen J. Kobayashi M. Selicharova I.  Sohn YC. Yoshizaki G. & Levavi-Sivan B.  2012. Steroidogenic response of carp ovaries to piscine FSH and LH depends on the reproductive phase.  General Comparative Endocrinology, 178, 28-36. doi:10.1016/j.ygcen.2012.04.002
  80. Biran J. Palevitch O, Ben-Dor S. Levavi-Sivan B. 2012. Neurokinin Bs and neurokinin B receptors in zebrafish- potential role in controlling fish reproduction. Proceedings of the National Academy of Sciences of the United States of America. 109, 10269-10274. doi:10.1073/pnas.1119165109
  81. Nocillado JN*. Biran J*. Lee YY. Levavi-Sivan B. Mechaly A. Elizur A. 2012. The Kiss2 receptor (Kiss2r) gene in Southern Bluefin Tuna, Thunnus maccoyii, and in Yellowtail Kingfish, Seriola lalandi – functional analysis and isolation of transcript variants.  Molecular and Cellular Endocrinology 362, 211-220 *Contributed equally to this study. doi:10.1016/j.mce.2012.06.024
  82. Aizen J. Kowalsman N. Hollander L. Kobayashi M. Sohn YC. Yoshizaki G. Niv Y.M. Levavi-Sivan B. 2012. Experimental and computational study of inter- and intra- species specificity of gonadotropins for various gonadotropin receptors. Molecular and Cellular Endocrinology. 364:89-100. doi: 10.1016/j.mce.2012.08.013
  83. Gur D. Politi Y. Levavi-Sivan B. Fratzl P. Weiner S. Addadi L. 2012. Guanine based photonic crystals in fish scales form from an amorphous precursor. Angewandte Chemie, 52,   388-391. doi:10.1002/anie.201205336
  84. Muwanika VB. Nakamya M. F. Rutaisire J. Levavi-Sivan B. Masembe C.  2012. Low genetic differentiation among morphologically distinct Labeo barbus species (Teleostei: Cyprinidae) in the Lake Victoria and Albertine basins, Uganda: insights from mitochondrial DNA. African Journal of Aquatic Science 3, 143-153. doi:10.2989/16085914.2012.668850
  85. Stadtlander T. Levavi-Sivan B. Kerem Z. Dweik H. Qutob M.  Abu-Lafi S. Francis G. Focken U. Becker K. 2013. Effects of a saponin fraction extracted from Trigonella foenum-graecum L. and two commercially available saponins on sex ratio and gonad histology of Nile tilapia fry, Oreochromis niloticus (L.). Journal Applied Ichthyology. 1, 265-267. doi: 10.1111/jai.12002
  86. Nocillado J. Zohar Y. Biran J. Levavi-Sivan B. Elizur A. 2013. Chronic kisspeptin administration stimulated gonadal development in pre-pubertal male yellowtail kingfish (Seriola lalandi; Perciformes) during the breeding and non-breeding season, General and Comparative Endocrinology. 191,168-76. doi:10.1016/j.ygcen.2013.06.005
  87. Golan M. Levavi-Sivan B. 2013. Social dominance in tilapia is associated with gonadotroph proliferation. General and Comparative Endocrinology. 192, 126-35. doi: 10.1016/j.ygcen.2013.04.032
  88. Rutaisire J. Levavi-Sivan B.  Aruho C. Chobet Ondhoro C. 2013. Gonadal recrudescence and induced spawning in Barbus atlitinalis. Aquaculture Research. 1-10. doi:10.1111/are.12213
  89. Damasceno-Oliveira A. Levavi-Sivan B. Aizen J. Gonçalves J. Fernández-Durán J. Coimbra J. 2013. Pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels in maturing female flounder Platichthys flesus under hydrostatic pressure simulating vertical migrations. Marine Biology Research. 10, 85-92. doi10.1080/17451000.2013.793813
  90. Fenald S.  Ng KW Xue X. Ramadasan PN. Sivalingam M. Li S. Levavi-Sivan B, Lin H, Liu X Parhar1 IS. 2013. Thyroid hormone upregulates hypothalamic kiss2 gene in the male Nile tilapia, Oreochromis niloticus. Frontiers in Endocrinology 4, 184. Doi: 10.3389/fendo.2013.00184
  91. Zmora N. Stubblefield J. Golan M. Servili A. Levavi-Sivan B. Zohar Y. 2014. The medio-basal hypothalamus as a dynamic and plastic reproduction related kisspeptin-gnrh-pituitary center in fish. Endocrinology 155,1874-86. Doi: 10.1210/en.2013-1894
  92. Golan M. Levavi-Sivan B. 2014. Artificial masculinization in tilapia involves androgen receptor activation. General and Comparative Endocrinology. 207, 50-55. doi: 10.1016/j.ygcen.2014.04.026
  93. Bloch CL. Kedar N. Golan M. Gutnick MJ. Fleidervish IA. Levavi-Sivan B. 2014. Long-Term GnRH-induced gonadotropin secretion in a novel hypothalamo-pituitary slice culture from tilapia brain.  General and Comparative Endocrinology. 207 ,21-27. doi: 10.1016/j.ygcen.2014.05.017
  94. Shpilman M. Hollander-Cohen L. Ventura T. Gertler A. Levavi-Sivan B.  2014. Production, gene structure and characterization of two orthologs of leptin and a leptin receptor in tilapia. General and Comparative Endocrinology. 207, 74-85.  doi:10.1016/j.ygcen.2014.05.006
  95. Aizen J. Kowalsman N. Niv YM. Levavi-Sivan B. 2014. Characterization of tilapia (Oreochromis niloticus) gonadotropins by modeling and immunoneutralization. General and Comparative Endocrinology. 207, 28-33. doi: 10.1016/j.ygcen.2014.05.028
  96. Kato CD. Nyatia E. Matovu E. Uni Z. Kedar O. Hakim Y. Levavi-Sivan B. Rutaisire J. 2014. Developmental changes in the activity of intestinal brush border enzyme in the wild juvenile Nile perch Lates niloticus (Linnaeus, 1758). International Journal of Fisheries and Aquaculture, 6, 71-79. doi: 10.5897/IJFA2013.0396
  97. Olabode OS. Golan M. Levavi-Sivan B.  2014. Preliminary report on the production of transgenic Oreochromis niloticus using tol 2 kit. Nigerian Journal of Biotechnology, 27, 34 – 39.
  98. Biran J. Golan M. Mizrahi N. Ogawa S. Parhar IS. Levavi-Sivan B. 2014. LPXRFa, the piscine ortholog of GnIH, and LPXRF-receptor positively regulate gonadotropin secretion in tilapia (Oreochromis niloticus). Endocrinology. 155, 4391-401. doi: 10.1210/en.2013-2047
  99. Biran J. Golan, M. Mizrahi N. Ogawa S. Parhar, IS. Levavi-Sivan B. 2014. Direct regulation of gonadotropin release by neurokinin B in tilapia (Oreochromis niloticus). Endocrinology. 155, 4831–4842. doi:10.1210/en.2013-2114
  100. Golan M. Biran J. Levavi-Sivan, B. 2014. A novel model for development, organization, and function of gonadotropes in fish pituitary gonadotropin beta subunit promoters drive correct expression of transgenes in zebrafish. Frontiers in Endocrinology. 5, 182. doi: 10.3389/fendo.2014.00182
  101. Sower SA, Decatur WA, Hausken KN, Marquis TJ, Barton SL, Gargan J, Freamat M, Wilmot M, Hollander L, Hall JA, Nozaki M, Shpilman M, Levavi-Sivan B. 2015. Emergence of an ancestral glycoprotein hormone in the pituitary of the sea lamprey, a basal vertebrate. Endocrinology.  156:3026-37. doi:10.1210/en.2014-1797
  102. Zmora N. Stubblefield J. Wong T.T. Levavi-Sivan B. Millar R.P. Zohar Y. 2015. Specific roles for Kisspeptin 1 and Kisspeptin 2 in the regulation of reproduction in the striped bass, Morone saxatilis, revealed by two kisspeptin antagonists. Biology of Reproduction. 93:76. doi:10.1095/biolreprod.115.131870
  103. Golan M. Zelinger E. Zohar Y. Levavi-Sivan B. 2015. Architecture of GnRH-Gonadotrope-Vasculature reveals a dual mode of gonadotropin regulation in fish. Endocrinology. 156:4163-73. doi: 10.1210/en.2015-1150
  104. Ogawa S, Sivalingam M, Biran J, Golan M, Anthonysamy RS, Levavi-Sivan B, Parhar IS. 2016. Distribution of LPXRFa, a gonadotropin-inhibitory hormone ortholog peptide, and LPXRFa receptor in the brain and pituitary of the tilapia. J Comp Neurol. 524:2753-75. doi:10.1002/cne.23990
  105. Golan M, Martin AO, Mollard P, Levavi-Sivan B. 2016. Anatomical and functional gonadotrope networks in the teleost pituitary. Scientific Reports 6:23777. doi:10.1038/srep23777
  106. Golan M, Hollander-Cohen L, Levavi-Sivan B. 2016. Stellate cell networks in the teleost pituitary. Scientific Reports 6:24426. doi:10.1038/srep24426
  107. Yom-Din S, Hollander-Cohen L., Aizen J., Boehm B.,  Shpilman M., Golan M., Hurvitz A.,  Degani G.  Levavi-Sivan B. 2016. Gonadotropins in the Russian sturgeon: Their role in steroid secretion and the effect of hormonal treatment on their secretion. Plos One, 11:e0162344. doi: 10.1371/journal.pone.0162344
  108. Sanchis-Benlloch, PJ. Nocillado, JN. Ladisa, C. Aizen, J. Miller, A. Shpilman, M. Levavi-Sivan, B. Ventura, T. Elizur A. 2017. In-vitro and in-vivo biological activity of recombinant Yellowtail kingfish (Seriola lalandi) follicle stimulating hormone. General and Comparative Endocrinology. 241:41-49. doi:10.1016/j.ygcen.2016.03.001
  109. Aizen J, Hollander-Cohen L, Shpilman M, Levavi-Sivan B. 2017. Biologically active recombinant carp LH as a spawning inducing agent for Carp. Journal of Endocrinology. 232:391-402. doi:10.1530/JOE-16-0435
  110. Zmora N. Wong TS. Stubblefield J. Levavi-Sivan B. Zohar Y. 2017. Neurokinin B regulates reproduction via inhibition of kisspeptin in striped bass. Journal of Endocrinology. 233:159-174. doi:10.1530/JOE-16-0575
  111. Simon Y. Levavi-Sivan B. Cahaner A. Hulata G. Halachmi I. 2017. A behavioral sensor for fish welfare. Aquaculture Engineering. 77: 107–111. doi:10.1016/j.aquaeng.2017.04.001
  112. Spicer OS, Zmora N, Wong TS, Golan M, Levavi-Sivan B, Gothilf Y, Zohar Z.  2017. The GnIH (Lpxrfa) system’s regulation of reproduction in the brain-pituitary axis of the zebrafish. Biology of Reproduction, 96:1031-1042. doi:10.1093/biolre/iox032
  113. Levavi Sivan B, Degani G, Hurvitz A 2017. Vitellogenin level in the plasma of Russian sturgeon (Acipenser gueldenstaedtii) in Northern Israel. J Marine Sci Res Dev 7:244-247. doi:10.4172/2155-9910.1000244
  114. Cohen-Hollander L, Aizen J, Golan M, Shpilman M Levavi-Sivan B. 2018. Characterization of carp gonadotropins: structure, yearly profile, establishment of ELISA and cross reaction. General Comparative Endocrinology, 264:28-38: doi:10.1016/j.ygcen.2017.11.022
  115. Hausken KN, Tizon B, Shpilman M,  Barton SL, Decatur WA, Plachetzki D, Freamat M, Kavanaugh M,  Ul-Hasan M, Levavi-Sivan B, S.A. Sower. 2018. Cloning and characterization of sea lamprey thyrostimulin (GpA2/GpB5), a novel pituitary glycoprotein hormone. General Comparative Endocrinology, 264:16-27. doi: 10.1016/j.ygcen.2018.04.010
  116. Biran, J. Levavi-Sivan, B. 2018. Endocrine Control of Reproduction, Fish. In M. K. Skinner (Ed.), Encyclopedia of Reproduction. vol. 6, pp. 362–368. Academic Press: Elsevier.
  117. Burow S, Fontaine R, von Krogh K, Mayer I, Nourizadeh-Lillabadi R, Hollander-Cohen L, Cohen Y, Shpilman M, Levavi-Sivan B, Weltzien FA. Medaka follicle-stimulating hormone (Fsh) and luteinizing hormone (Lh): Developmental profiles of pituitary protein and gene expression levels. Journal of Endocrinology. In press

Lab Members

Their positions in the lab, i.e., Post-Doc, Grad student, etc.


Dr. Michal Shpilman
Lab Manager


Lian Holander
PhD student


Naama Mizrahi
PhD student


Svetlana Yom-Adin
PhD student


Benjamin Bohem
PhD student


Yaron Cohen
M.Sc student

Former members of the lab:

Dr. Ori Palevitch; Post-doc,
Dr. Gul Ayten Kiris Inan
Rima Vaiman; Technician
Dr. Joseph Aizen
Dr. Ayelet Avitan
Dr. Harel Kasuto
Dr. Avshalom Hurvitz Dr. Liraz Levi
Binyamin Shapira; M.Sc.;
Tamit Kanias; MSc
Yechiam Shapira; M.Sc
Michal Yacobovitz; M.Sc
Dr. Jacob Biran
Dr. Matan Golan
Dr. Corinne Bloch
Danit Amir; M.Sc
Yoav Bonfil; M.Sc
Omer Barsheshet; M.Sc
Naama Gruber; Amirim Project