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Associate Professor Mark Lokman

Email mark.lokman@otago.ac.nz

Phone 64-3-479-5846

Mark-Lokman

Teaching

Research Interests

  • Endocrine control of previtellogenic oocyte growth
  • Mechanisms controlling fecundity in fish
  • Evolution of vertebrate endocrine systems
  • Growth and reproduction of aquaculture species in NZ
  • Developmental Genetics

Current issues (potential research projects) in the NZ aquaculture industry include:
1. full artificial control of abalone reproduction
2. interaction between growth and reproduction in salmon
3. control of reproduction in eel, hapuka (groper) and giant kokopu
4. development of farming methods for new aquaculture species

Postgraduate Students

  • Erin Forbes (PhD) - effects of androgens on eel liver physiology
  • Khalid Alqaisi (PhD) - evolution of steroidogenesis in starfish
  • Sean Divers (PhD) - induced spawning of eel
  • Yair Kohn (PhD) - oogenesis and egg quality in hapuka
  • Ali Falahati (PhD) - GDF-9 signaling in the eel ovary
  • Alireza (Hamed) Shoae (PhD) - the ovarian IGF-I system in eel
  • Sam Van der Horst (MSc) - effects of steroids on eel heaptocytes
  • Tasman Gillies (MSc) - spawning induction in abalone

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Publications

Liu, H., Todd, E. V., Lokman, M. P., Lamm, M. S., Godwin, J. R., & Gemmell, N. J. (2017). Sexual plasticity: A fishy tale. Molecular Reproduction & Development, 84(2), 171-194. doi: 10.1002/mrd.22691

Damsteegt, E. L., McHugh, N., & Lokman, P. M. (2016). Storage by lyophilization: Resulting RNA quality is tissue dependent. Analytical Biochemistry, 511, 92-96. doi: 10.1016/j.ab.2016.08.005

Lokman, P. M., Damsteegt, E. L., Wallace, J., Downes, M., Goodwin, S. L., Facoory, L. J., & Wylie, M. J. (2016). Dose-responses of male silver eels, Anguilla australis, to human chorionic gonadotropin and 11-ketotestosterone in vivo. Aquaculture, 463, 97-105. doi: 10.1016/j.aquaculture.2016.05.009

Setiawan, A. N., Muncaster, S., Pether, S., King, A., Irvine, G. W., Lokman, P. M., & Symonds, J. E. (2016). The effects of gonadotropin-releasing hormone analog on yellowtail kingfish Seriola lalandi (Valenciennes, 1833) spawning and egg quality. Aquaculture Reports, 4, 1-9. doi: 10.1016/j.aqrep.2016.05.001

Di Biase, A., Casalini, A., Emmanuele, P., Mandelli, M., Lokman, P. M., & Mordenti, O. (2016). Controlled reproduction in Anguilla anguilla (L.): Comparison between spontaneous spawning and stripping-insemination approaches. Aquaculture Research, 47(10), 3052-3060. doi: 10.1111/are.12755

Chapter in Book - Research

Young, G., Kusakabe, M., Nakamura, I., Lokman, P. M., & Goetz, F. W. (2005). Gonadal steroidogenesis in teleost fish. In P. Melamed & N. Sherwood (Eds.), Molecular aspects of fish and marine biology (vol. 4): Hormones and their receptors in fish reproduction. (pp. 155-223). Singapore: World Scientific.

Lokman, P. M., Rohr, D. H., Davie, P. S., & Young, G. (2003). The physiology of silvering in anguillid eels: Androgens and control of metamorphosis from the yellow to silver stage. In K. Aida, K. Tsukamoto & K. Yamauchi (Eds.), Eel biology. (pp. 331-349). Tokyo: Springer.

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Journal - Research Article

Liu, H., Todd, E. V., Lokman, M. P., Lamm, M. S., Godwin, J. R., & Gemmell, N. J. (2017). Sexual plasticity: A fishy tale. Molecular Reproduction & Development, 84(2), 171-194. doi: 10.1002/mrd.22691

Damsteegt, E. L., McHugh, N., & Lokman, P. M. (2016). Storage by lyophilization: Resulting RNA quality is tissue dependent. Analytical Biochemistry, 511, 92-96. doi: 10.1016/j.ab.2016.08.005

Di Biase, A., Casalini, A., Emmanuele, P., Mandelli, M., Lokman, P. M., & Mordenti, O. (2016). Controlled reproduction in Anguilla anguilla (L.): Comparison between spontaneous spawning and stripping-insemination approaches. Aquaculture Research, 47(10), 3052-3060. doi: 10.1111/are.12755

Setiawan, A. N., Muncaster, S., Pether, S., King, A., Irvine, G. W., Lokman, P. M., & Symonds, J. E. (2016). The effects of gonadotropin-releasing hormone analog on yellowtail kingfish Seriola lalandi (Valenciennes, 1833) spawning and egg quality. Aquaculture Reports, 4, 1-9. doi: 10.1016/j.aqrep.2016.05.001

Lokman, P. M., Damsteegt, E. L., Wallace, J., Downes, M., Goodwin, S. L., Facoory, L. J., & Wylie, M. J. (2016). Dose-responses of male silver eels, Anguilla australis, to human chorionic gonadotropin and 11-ketotestosterone in vivo. Aquaculture, 463, 97-105. doi: 10.1016/j.aquaculture.2016.05.009

Damsteegt, E. L., Ozaki, Y., McCormick, S. P. A., & Lokman, P. M. (2016). Triacylglyceride physiology in the shortfinned eel, Anguilla australis: The effects of androgen. American Journal of Physiology: Regulatory, Integrative & Comparative Physiology, 310, R422-R431. doi: 10.1152/ajpregu.00149.2015

Alqaisi, K. M., Lamare, M. D., Grattan, D. R., Damsteegt, E. L., Schneider, W. J., & Lokman, P. M. (2016). A comparative study of vitellogenesis in Echinodermata: Lessons from the sea star. Comparative Biochemistry & Physiology Part A, 198, 72-86. doi: 10.1016/j.cbpa.2016.04.013

Wylie, M. J., Closs, G. P., Damsteegt, E. L., & Lokman, P. M. (2016). Effects of salinity and temperature on artificial cultivation and early ontogeny of giant kokopu, Galaxias argenteus (Gmelin 1789). Aquaculture Research, 47(5), 1472-1480. doi: 10.1111/are.12605

Lokman, P. M., Wylie, M. J., Downes, M., Di Biase, A., & Damsteegt, E. L. (2015). Artificial induction of maturation in female silver eels, Anguilla australis: The benefits of androgen pre-treatment. Aquaculture, 437, 1111-1119. doi: 10.1016/j.aquaculture.2014.11.026

Akhavan, S. R., Falahatkar, B., Tolouei Gilani, M. H., & Lokman, P. M. (2015). Effects of estradiol-17β implantation on growth rate, ovarian growth, sex steroid levels and vitellogenin proxies in previtellogenic sturgeon Huso huso. Animal Reproduction Science, 157, 1-10. doi: 10.1016/j.anireprosci.2014.12.010

Damsteegt, E. L., Mizuta, H., Hiramatsu, N., & Lokman, P. M. (2015). How do eggs get fat? Insights into ovarian fatty acid accumulation in the shortfinned eel, Anguilla australis. General & Comparative Endocrinology, 221, 94-100. doi: 10.1016/j.ygcen.2014.12.019

Kohn, Y. Y., Symonds, J. E., Kleffmann, T., Nakagawa, S., Lagisz, M., & Lokman, P. M. (2015). Proteomic analysis of early-stage embryos: Implications for egg quality in hapuku (Polyprion oxygeneios). Fish Physiology & Biochemistry, 41(6), 1403-1417. doi: 10.1007/s10695-015-0095-0

Senior, A. M., Lokman, M. P., Closs, G. P., & Nakagawa, S. (2015). Ecological and evolutionary applications for environmental sex reversal of fish. Quarterly Review of Biology, 90(1), 23-44. doi: 10.1086/679762

Zadmajid, V., Falahatimarvast, A., Damsteegt, E. L., Setiawan, A. N., Ozaki, Y., Shoae, A., & Lokman, P. M. (2015). Effects of 11-ketotestosterone and temperature on inhibin subunit mRNA levels in the ovary of the shortfinned eel, Anguilla australis. Comparative Biochemistry & Physiology Part B, 187, 14-21. doi: 10.1016/j.cbpb.2015.04.012

Damsteegt, E. L., Falahatimarvast, A., McCormick, S. P. A., & Lokman, P. M. (2015). Triacylglyceride physiology in the short-finned eel, Anguilla australis: Changes throughout early oogenesis. American Journal of Physiology: Regulatory, Integrative & Comparative Physiology, 308(11), R935-R944. doi: 10.1152/ajpregu.00436.2014

Lokman, P. M., & Symonds, J. E. (2014). Molecular and biochemical tricks of the research trade: -omics approaches in finfish aquaculture. New Zealand Journal of Marine & Freshwater Research, 48(3), 492-505. doi: 10.1080/00288330.2014.928333

Akbaripasand, A., Ramezani, J., Lokman, P. M., & Closs, G. P. (2014). Can drifting invertebrates meet the energy requirements of drift-feeding fish? A Case Study on Galaxias fasciatus. Freshwater Science, 33(3), 904-914. doi: 10.1086/676957

Akbaripasand, A., Ramezani, J., Lokman, P. M., & Closs, G. P. (2014). Does social status within a dominance hierarchy mediate individual growth, residency and relocation? Oecologia, 176(3), 771-779. doi: 10.1007/s00442-014-3038-z

Johnson, S. L., Villarroel, M., Rosengrave, P., Carne, A., Kleffmann, T., Lokman, P. M., & Gemmell, N. J. (2014). Proteomic analysis of Chinook salmon (Oncorhynchus tshawytscha) ovarian fluid. PLoS ONE, 9(8), e104155. doi: 10.1371/journal.pone.0104155

Damsteegt, E. L., Mizuta, H., Ozaki, Y., Hiramatsu, N., Todo, T., Hara, A., … Lokman, P. M. (2014). Development and partial characterisation of an antiserum against apolipoprotein B of the short-finned eel, Anguilla australis. Journal of Comparative Physiology B, 184(5), 589-599. doi: 10.1007/s00360-014-0821-4

Wylie, M. J., Forbes, E. L., & Lokman, P. M. (2013). Ovarian biopsy: A non-terminal method to determine reproductive status in giant kokopu, Galaxias argenteus (Gmelin 1789). New Zealand Veterinary Journal, 61(5), 292-296. doi: 10.1080/00480169.2012.740657

Reid, P. M., Divers, S. L., Zadmajid, V., Alqaisi, K. M., & Lokman, P. M. (2013). Steroidogenic acute regulatory protein transcript abundance in the eel, Anguilla australis: Changes during the induced reproductive cycle and effects of follicle-stimulating hormone during previtellogenesis. Journal of Steroid Biochemistry & Molecular Biology, 138, 464-470. doi: 10.1016/j.jsbmb.2013.02.003

Ghosh, R., Lokman, P. M., Lamare, M. D., Metcalf, V. J., Burritt, D. J., Davison, W., & Hageman, K. J. (2013). Changes in physiological responses of an Antarctic fish, the emerald rock cod (Trematomus bernacchii), following exposure to polybrominated diphenyl ethers (PBDEs). Aquatic Toxicology, 128-129, 91-100. doi: 10.1016/j.aquatox.2012.11.019

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