Bayworld Centre for Research & Education



Applied and Physical Oceanography

  • Downey, N.J., Roberts, M.J. and Baird, D. (2010)
    Spawning behaviour of the chokka squid Loligo reynaudii and the potential effects of temperature.
    ICES J Marine Science, 67: 231–243.
  • Martins, R., Roberts M.J., Vidal, É.A.G. and Moloney C. (2010)
    Effects of temperature on yolk utilization in chokka squid (Loligo reynaudii d'Orbigny, 1839) paralarvae.
    Journal of Experimental Marine Biology and Ecology. 000–000.
  • Roberts M.J. (2010)
    Coastal currents and temperatures along the central region of Algoa Bay, South Africa, with implications for transport and shelf–bay water exchange.
    African Journal of Marine Science, 32(3): 000–000.
  • Roberts, M.J. and Mullon, C. (2010)
    First Lagrangian ROMS–IBM simulations indicate large losses of chokka squid Loligo reynaudii paralarvae from South Africa’s Agulhas Bank.
    African Journal of marine Science, 32(3): 000–000.
  • Hutchings, L., Augustyn, C.J, Cockcroft, A., van der Lingen, C., Coetzee, J., Leslie, R.W., Tarr, R.J., Oosthuizen, H., Lipinski, M.R., Roberts, M.J., Wilke, C., Crawford, R., Shannon L.J. and Mayekiso, M. (2009)
    Marine fisheries monitoring programmes in South Africa.
    South African Journal of Science. 105: 182–192.
  • Hutchins, L., Roberts, M.J. and Verheye, H.M. (2009)
    Marine environmental monitoring programs in South Africa: a review.
    South African Journal of Science 105: 94–102.
  • Oosthuizen, A. and Roberts, M.J. (2009)
    Bottom temperature and in situ development of chokka squid eggs (Loligo vulgaris reynaudii) on the deep spawning grounds, South Africa.
    ICES Journal of Marine Science, 66: 1967–1971.
  • Singh, L., Downey, N.J., Roberts, M.J., Webber, D.M., Smale, M.J., van den Berg, M. A., Harding, R.T., Engelbrecht, D.C. and Blows, B.M. (2009)
    Design and calibration of an acoustic telemetry system subject to upwelling events.
    African Journal of Marine Science, 31(1): 355–364.
  • Kyewalyanga, M.S., Naik, R., Hegde, S., Raman, M., Barlow, R. and Roberts, M.J. (2007)
    Phytoplankton biomass and primary production in Delagoa Bight Mozambique: Application of remote sensing.
    Estuarine, Coastal and Shelf Science. 74: 429–436.
  • Hissmann, K., Fricke, H., Schauer, J., Ribbink, A.J., Roberts, M., Sink, K. and Heemstra, P. (2006)
    The South African coelacanths – an account on what is known after three submersible expeditions.
    South African Journal of Science. 102: 491–500.
  • Ribbink, A.J. and Roberts, M.J. (2006)
    African coelacanth ecosystem program: An overview of the conference contributions.
    South African Journal of Science, 102: 409–415.
  • Roberts, M.J., Ribbink, A.J., Morris, T., van den Berg, M.A., Engelbrecht D.C. and Harding, R.T. (2006)
    Oceanographic environment of the Sodwana Bay coelacanths (Latimeria chalumnae), South Africa.
    South African Journal of Science. 102: 435–443.
  • Whittle, C., Lamont, T., Bernard, S., Shillington, F., Saulquin, B., Roberts, M.J. and Barlow, R. (2006)
    Development of satellite remote sensing products and services for operational application in the management of marine resources in southern Africa.
    Conference proceedings of the 6th International Conference of the African Association of Remote Sensing (AARSE) of the Environment. 30 October – 2 November 2006, Cairo, Egypt.
  • Roberts, M.J. (2005)
    Chokka squid (Loligo vulgaris reynaudii) abundance maybe linked to changes in the Agulhas Bank (South Africa) ecosystem during spawning and the early life cycle.
    ICES J. mar. Sci. 62(1). pp. 33–55.
  • Roberts, M.J. and van den Berg, M. (2005)
    ADCP measured currents along the Tsitsikamma Coast (South Africa) and potential transport of squid paralarvae.
    African Journal of marine Science. 27(2): 375–388.
  • Vidal, E., Hackbart, V. and Roberts, M.J. (2005)
    Rearing, yolk absorption and growth in Loligo vulgaris reynaudii paralarvae.
    Aquatic Living Resources, 18: 385–393.
  • Vidal, E., Hackbart, V. and Roberts, M.J. (2004)
    Rearing, yolk absorption and growth in Loligo vulgaris reynaudii paralarvae (2004).
    ICES Annual Science Conference, Vigo, Spain, 22–25 September. CM 2004/CC:39.
  • Brouwer, S.L., Griffiths, M.H. and Roberts, M.J. (2003)
    Adult movement and larval dispersal of Argyrozona argyrozona (Pisces: Sparidae) from a temperate marine protected area.
    African Journal of marine Science. 25: 395-402.
  • Hutchins, L., Beckley, L.E., Griffiths, M.H., Roberts, M.J., Sundby, S., and van der Lingen, C. (2002)
    Spawning on the edge: spawning grounds and nursery areas around the southern African coastline.
    Mar. Freshwater Res., 53: 307-318.
  • Oosthuizen, A., Roberts, M.J. and Sauer, W.H.H. (2002)
    Early post-cleavage stages and abnormalities identified in the embryonic development of chokka squid (Loligo vulgaris reynaudii).
    S. A. J. mar. Sci., 24: 209-213.
  • Oosthuizen, A., Roberts, M.J. and Sauer, W.H.H. (2002)
    Temperature effects on embryonic development and hatching success of the squid Loligo vulgaris reynaudii.
    In Cepalopod Biomass and Production. Part II. pp. 619–632. Ed. by P. R. Boyle, M. A. Collins and G. J. Pierce. Bulletin of Marine Science, 71(2).
  • Roberts, M.J. and van den Berg, M. (2002)
    Recruitment variability of chokka squid — role of currents on the Agulhas Bank (South Africa) in paralarvae distribution and food abundance. Part II. pp. 691-710. Ed. by P. R. Boyle, M. A. Collins and G. J. Pierce.
    Bulletin of Marine Science, 71(2).
  • Roberts, M.J., Barange, M., Lipinski, M. and Prowse, M. (2002)
    Hydro-acoustic targets may provide the first accurate positions of chokka squid (Loligo vulgaris reynaudii) deep spawning sites?
    S. Afr. J. mar. Sci., 24: 113-117.
  • Schön, P-J., Sauer, W.H.H. and Roberts, M.J. (2002)
    Environmental influences on spawning aggregations and jig catches of chokka squid (Loligo vulgaris reynaudii): an in-situ study. Part II. pp. 783–800. Ed. by P. R. Boyle, M. A. Collins and G. J. Pierce.
    Bulletin of Marine Science, 71(2).
  • Smale, M.J., Sauer, W.H.H. and Roberts, M.J. (2001)
    Behavioural interactions of predators and spawning chokka squid off South Africa: Towards quantification.
    Marine Biology, 139: 1095-1105
  • Lutjeharms, J.R.E., Cooper, J. and Roberts, M. (2000)
    Upwelling at the inshore edge of the Agulhas Current.
    Continental Shelf Research. 20(2000): 737-761.
  • Gründlingh, M.L., Lutjeharms, J.R.E., Brundrit, G., Agenbag, J.J., Boyd, A., Nelson, G., Johnson, A., Roberts, M., Shannon, L. and Schumann, E.H. (1999)
    Physical oceanographic activities in South Africa: 1995-1998.
    S. Afr. J. Sci., 95: 281-288.
  • Lipinski, M.R., Augustyn, C.J., Brodziak, J.K.T., Butterworth, D.S., Christy, G., des Clers, S., Jackson, G.D., O’Dor, R.K. Pauly, D., Purchase, L., Roberts, M.J., Roel, B.A., Sakuai, Y and Sauer, W.H.H. (1999)
    Cephalopod fisheries: A future global upside to past over-exploitation of living marine resources?
    Results of an international workshop, 31 Agust- 2 September 1997, Cape Town, South Africa. S. A. J. mar. Sci., 20: 257-263.
  • Roberts, M.J. (1999)
    The influence of the environment on chokka squid Loligo vulgaris reynaudii spawning aggregations: steps towards a quantified model.
    S. A. J. mar. Sci., 20: 134-149.
  • Le Clus, F, Agenbag, J.J., Hennig, H.F-K.O., Roberts, M.J., Grünlingh, M.L., Sims, P.F. and Struthers, M.J. (1998)
    Seasonal and interannual variability in wind field and commercial catch rates of Austroglossus pectoralis (Soleidae).
    In: Benguela Dynamics. Impact of Variability on Shelf-Sea Environments and their Living Resources. Pillar, S.C., Moloney, C.L., Payne, A.I.L. and F.A. Shillington (Eds). S. Afr. J. mar. Sci. 19: 377-390.
  • O'Dor, R.K., Andrade, Y., Webber, D.M., Sauer W.H.H., Roberts, M.J., Smale, M.J. and Voegeli, F.M. (1998)
    Applications and performance of radio-acoustic positioning and telemetry (RAPT) systems.
    Hydrobiologia, 371/372: 1-8.
  • Roberts, M.J. (1998)
    What happened to the South Coast El Niño 1997-98, squid catches?
    In: Fishing Handbook: South Africa, Namibia, Moçambique 1998, 26th Edition,pp. 233-238. Ed. by M. Stutterford. Marine Information cc, Stellenbosch. pp. 438.
  • Roberts, M.J., Rodhouse, P., O’Dor, R.K. and Sakurai, Y. (1998)
    A global perspective of environmental research on squid.
    ICES CM1998/M:27: pp. 19.
  • Sauer, W.H.H., Roberts, M.J., Lipinski, M.R., Smale, M.J., Hanlon, R.T., Webber, D.M. and O’Dor, R.K. (1997)
    Choreography of the squid’s “nuptual dance”.
    Biol. Bull. mar. bio. Lab., Woods Hole. 192: 203-207.
  • Le Clus, F. and Roberts, M.J. (1996)
    Topographic and hydrographic effects on catch rates of Austrolossus Pectoralis (Soleidae) on the Agulhas Bank.
    S. Afr. J. mar. Sci., 16: 321-332.
  • O'Dor, R.K., Webber, D.M., Sauer W.H.H., Roberts, M.J. and Smale, M.J. (1995)
    High Resolution, 3-D tracking of squid on spawning grounds with radio-acoustic positioning.
    In: Proc. 13th Int. Symp. Biotelemtry. Cristalli, C. Amlaner, C.J. and M.R. Neuman (Eds). Fayetteville; University of Arkansas Press: 193-198.
  • Augustyn, C.J., Lipinski, M.R., Sauer, W.H.H., Roberts, M.J., and Mitchell-Innes, B.A. (1994)
    Chokka squid on the Agulhas Bank: life history and ecology.
    S. Afr. J. Sci. 90, 143-154.
  • Roberts, M.J. and Sauer, W.H.H. (1994)
    Environment: the key to understanding the South African chokka squid fishery (loligo vulgaris reynaudii) life cycle and fishery?
    Antarctic Sci. 6(2): 249-258.
  • Quick, A.J.R. and Roberts, M.J. (1993)
    Table Bay, Cape Town, South Africa: synthesis of available information and management implications.
    S. Afr. J. Sci. 89: 276-287.
  • Lord, D.A., Mackay, H.M. and Roberts, M.J. (1992)
    Management of receiving water quality in the coastal zone.
    Water, Science and Technology, 21(2): 25-31.
  • Roberts, M.J. (1990)
    Dispersion of a buoyant effluent discharged into nearshore waters of Algoa Bay.
    MSc Thesis. University of Port Elizabeth. pp. 287.
  • Lord, D. and Roberts, M.J. (1989)
    Water quality management in rapidly growing coastal areas.
    In proceedings: 8 Int. Ocean Disposal Symp., Dubrovik (Yugoslavia), 9-13 Oct. 1989: pp. 39.
  • Lord, D.A., Grabow, W.O.K. and Roberts, M.J. (1989)
    Dispersion of sewage wastes in nearshore waters: applicability of water quality.
    Water, Science and Technology, 21(2): 77-81.