Centre for in situ Observational Oceanography

Publications

All references listed below are contributions and/or collaborations by members and students affliated to Marine and Coastal management (MCM), Bayworld Centre for Research and Education (BCRE) and the African Coelacanth Ecosystem Programme (ACEP)




Tsitsikamma National Park

2005
  • Roberts, M.J., van den Berg, M.A. (2005)
    Currents along the Tsitsikamma coast, South Africa, and potential transport of squid paralarvae and icthyoplankton
    Afr. J. mar. Sci. 2005 27(2):375 - 388.
    Abstract  Paper
2003
  • Brouwer, S.L., Griffiths, M.H. and M.J.Roberts (2003)
    Adult movement and larval dispersal of Argyrozona argyrozona (Pisces: Sparidae) from a temperate marine protected area
    Afr. J. mar. Sci. 25:395-402.
    Abstract
1996
  • Tilney, R.L., Nelson, G., Radloff, S.E. and C.D. Buxton (1996)
    Ichthyoplankton distribution and dispersal in the Tsitsikamma National Park marine reserve, South Africa.
    S. Afr. J. mar. Sci. 17: 1–14.
    Abstract  Paper
1995
  • Sauer, W.H.H. (1995)
    South Africa's Tsitsikamma National Park as a protected breeding area for the commercially exploited chokka squid Loligo vulgaris reynaudii.
    S. Afr. J. mar. Sci. 16: 365-371.
    Abstract

Squid Research

2005
  • Roberts, M.J. , Harding, R , van den Berg, M.A. and A.G. Agenbag (2005)
    Satellite drifter observations on South Africa's Agulhas Bank and their relevance to the dispersion of Chokka squid (Loligo vulgaris reynaudii) paralarvae - summer 2002/3
    In press - ICES Journal of Marine Science
    Abstract  Paper
2004
  • Roberts, M.J. (2004)
    Chokka Squid (Loligo vulgaris reynaudii) abundance linked to changes in South Africa's Agulhas bank ecosystem during spawning and the early life cycle.
    ICES Journal of Marine Science, 62: 33-55
    Abstract  Paper
  • Vidal, Erica A.G. , Martins, Rodrigo S. and M.J. Roberts (2004)
    Yolk utilization, metabolism and growth in reared Loligo vulgaris reynaudii paralarvae
    ALR (in press)
    Abstract
2002
  • 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. Afr. J. Mar. Sci 24:379-382
    Abstract
  • 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.
    Bulletin of Marine Science Volume 71: 619-632
    Abstract
  • Roberts, M.J. and van den Berg, M.A. (2002)
    Recruitment variability of chokka squid - role of currents on the Agulhas Banks (South Africa) in paralarvae distribution and food abundance.
    Bulletin of Marine Science Volume 71: 691-710
    Abstract
  • Roberts, M.J., Barange, M., Lipinski, M.R. and M.R. Prowse (2002)
    Direct hydro-acoustic observations of chokka squid Loligo vulgaris reynaudii spawning activity in deep water.
    S. Afr. J. Mar. Sci 24: 387-393
    Abstract
  • Schon, 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: A "Black Box" approach.
    Bulletin of Marine Science Volume 71: 783-800
    Abstract
2000
  • Roberts, M.J, Sauer, W.H.H., Sessions, H. and M van den Berg (2000)
    The existence of deeper spawning grounds for the South Afican Chokka Squid Loligo vulgaris reynaudii.
    In press - Fisheries Oceanography
    Abstract
  • Schon, P.J. (2000)
    An investigation into the influence of the environment on spawning aggregations and jig catches of Chokka Squid Loligo vulgaris reynaudii off the south coast of South Africa.
    A thesis submitted in fulfillment of the requirements for the degree of Master of Science of Rhodes University
    Abstract
  • Smale, M.J., Roberts, M.J. and Sauer, W.H.H. (2000)
    Behavioural interactions of predators and spawning chokka squid off South Africa: Towards quantification.
    In press - S. Afr. J. Mar. Sci.
    Abstract
1999
  • Oosthuizen, A. (1999)
    The effects of temperature on embryonic development and hatching success of squid Loligo vulgaris reynaudii eggs.
    A thesis submitted in fulfillment of the requirements for the degree of Master of Science at the University of Port Elizabeth
    Abstract
1998
  • Lipinski, M. R., Butterworth, D. S., Augustyn, C. J., Brodziak, J. K. T., Christy, G., DES Clers, S., Jackson, G. D., O’Dor, R. K., Pauly, D., Purchase, L. V., Roberts, M. J., Roel, B. A., Sakurai, Y. and W. H. H. Sauer (1998)
    Cephalopod fisheries: a future global upside to past overexploitation of living marine resources?
    Results of an international workshop, 31 August – 2 September 1997, Cape Town, South Africa.
    In Cephalopod Biodiversity, Ecology and Evolution. Payne, A. I. L., Lipinski, M. R., Clarke, M. R. and M. A. C. Roeleveld (Eds).
    S. Afr. J. mar. Sci. 20: 463–469.
    Abstract
  • O'Dor, R.K., Andrade, Y., Weber, 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.
    Abstract
  • Roberts, M. J. (1998)
    The influence of the environment of chokka squid Loligo vulgaris reynaudii spawning aggregations: steps towards a quantified model.
    In Cephalopod Biodiversity, Ecology and Evolution. Payne, A. I. L., Lipinski, M. R., Clarke, M. R. and M. A. C. Roeleveld (Eds).
    S. Afr. J. mar. Sci. 20: 267–284.
    Abstract
  • 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
    Abstract
1997
  • Sauer, W.H.H., Roberts, M.J., Lipinski, M.R., Smale, M.J., Hanlon, R.T., Weber, D.M. and O'Dor,R.K. (1997)
    Choreography of the squid's "Nuptial Dance".
    Biol. Bull Mar. Bio Lab.,Woodshole. 192: 203-207
    Abstract
1995
  • O'Dor, R.K., Sauer, W.H.H., Roberts, M.J. and Smale, M.J. (1995)
    High resolution, 3-D tracking of squid on spawning ground with radio-acoustic positioning.
    In Proc. 13th Int. Symp. Biotelemtry. Cristalli, C., Amlaner, C.J. and Neuman, M.R. (Eds)
    Fayetteville; University of Arkansas Press: 193-198.
    Abstract
1994
  • Augustyn, C.J.,Lipinski, M.R.,SAUER, W.H.H.,ROBERTS, M.J., Mitchell-Innes, B.A. (1994)
    Chokka Squid on the Agulhas Bank: life history and ecology
    S.Afr. J. Sci., 90(3):143-154.
    Abstract
  • Roberts, M.J., Sauer, W.H.H. (1994)
    Environment: the key to understanding the South African chokka squid Loligo vulgaris reynaudii life cycle and fishery?
    Antarctic Sci. 6(2):249-258
    Abstract

Other Reseach

2007
  • Kyewalyanga M, Naik R, Hegde S, Raman M, Barlow R and M.J. Roberts (2007)
    Phytoplankton biomass and primary production in Delagoa Bight Mozambique: application of remote sensing.
    Estuarine, Coastal and Shelf. Science 74: 429-436
2006
  • A.J. Ribbink and M.J. Roberts (2006)
    African Coelacanth Ecosystem Programme: An overview of the conference contributions
    South African Journal of Science 102: 409 - 415
    Abstract
  • Karen Hissmann, Hans Fricke, Jurgen Schauer, A.J. Ribbink, M.J. Roberts, K. Sink and Phillip Heemstra (2006)
    The South African coelacanths - an account of what is known after three submersible expeditions
    South African Journal of Science 102: 491 - 500
    Abstract
  • M.J. Roberts, A.J. Ribbink, T. Moris, M.A. van den Berg, D.C. Engelbrecht and R.T. Harding (2006)
    Oceanographic environment of the Sodwana Bay coelacanths (Latimeria chalumnae), South Africa
    South African Journal of Science 102: 435 - 443
    Abstract
2001
  • Hutchings,L., van der Lingen,C., Griffiths,M., Roberts,M.R., Beckley,L.E. and S.Sunby (2001)
    Spawning on the edge:spawning habits and nursery areas along the southern African coastline.
    Marine Freshwater Research. 53(2002):307-318
    Abstract  Paper
2000
  • Lutjeharms, J.R.E, Cooper, J. and Roberts, M.J. (2000)
    Upwelling at the inshore edge of the Agulhas Current.
    Continental Shelf Research. 20(2000): 737-761.
    Abstract
1999
  • Grundlingh, M.L., Lutjeharms, J.R.E, Brundi T, G., Agenbag, J.J, Boyd, A, Nelson, G., Johnson, A., Roberts, M.J., Shannon, L.V. and Schumann, E.H. (1999)
    Physical oceanographic activities in South Africa: 1995-1998
    S. Afr. J. Sci., 95: 281-288
    Abstract
1998
  • Le Clus, F., Agenbag, J. J., Hennig, H. F-K. O., Roberts, M.J., Grundlingh, M. L., Sims, P. F. and M. J. Struthers (1998)
    Seasonal and interannual variability in wind field and commercial catch rates of Austroglossus pectoralis (Soleidae).
    In Benguela Dynamics: Impacts of Variability of 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.
    Abstract
1995
  • Le Clus, F. and M. J. Roberts (1995)
    Topographic and hydrographic effects on catch rates of Austroglossus pectoralis (Soleidae) on the Agulhas Bank.
    S. Afr. J. mar. Sci. 16: 321-332
    Abstract

Articles

2004
  • Engelbrecht, Niel (2004)
    Evidence of a semi-permanent cyclonic circulation on the edge of the Eastern Agulhas Bank
    In Sancor Newsletter #176 (April 2004)
    Article
  • Morris, Tamaryn (2004)
    A snap-shot of the oceanography along the Maputoland shelf edge - habitat of the coelacanth (Latimeria chalumnae)
    In Sancor Newsletter #176 (April 2004)
    Article
  • Morris, Tamaryn (2004)
    Coelacanth research in southern Africa
    In Research Hightlights 2002-2003 (Department of Environemntal Affiars and Tourism)
    Article
  • Silulwane, Nonkqubela; Mwicigi, Jean and Tamaryn Morris (2004)
    Blue earth Global Expedition (BEAGLE) - November/December 2003 - Experiences onboard the R/V Mirai
    In Sancor Newsletter #176 (April 2004)
    Article
2001
  • Attwood, Claire (2001)
    Special Report:
    1. The squid fishery in crisis
    2. Scientists link poor squid catches to El Nino
    3. Squid Research back on track
    In Fishing Industry News (October 2001), George Warman Publications, pp.5-8
    Article
2000
  • Roberts, M.J. (2000)
    Deep Blue - four eyes under the sea
    In The Hidden Edge - South Afica's quest for innovation
    pp. 54-55 - Published by the Department of Arts,Culture,Science and Technology
    Article
1998
  • Roberts, M.J. (1998)
    What happened to the South Coast El Nino 1997-1998, squid catches?
    In Fishing Handbook: South Africa, Namibia, Mozambique 1998, M. Stutterford (Ed)
    26th Edition, pp. 233-238 - Marine Information cc, Stellenbosch. pp. 438
    Article

Posters

2008
  • Hargey, N. and M.J. Roberts (2008)
    Port Alfred Upwelling Cell.
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Morris, T. Roberts, M.J., Lamont, T., Hancke,L. and M.A. van den Berg (2008)
    Effects of a cyclonic eddy on the northern Kwa-Zulu Natal shelf
    Abstracts of SCOR/IAPSO Workshop on Deep Ocean Exchange with the Shelf (DOES), 6 - 9 October 2008, Cape Town, South Africa.
    Abstract  Poster
  • Morris, T. Roberts, M.J., Schleyer, M.H. and M.A. van den Berg (2008)
    Physical Oceanography of Sodwana Bay
    Abstracts of SCOR/IAPSO Workshop on Deep Ocean Exchange with the Shelf (DOES), 6 - 9 October 2008, Cape Town, South Africa.
    Abstract  Poster
2007
  • Lamont, T., Morris, T., Roberts, M.J., and M.A. van den Berg (2007)
    Hydrographic and satellite observations of the physical characteristics of the Delagoa Bight.
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
  • Morris, T., Roberts, M.J. and M.H. Schleyer (2007)
    The current on the Sodwana Bay shelf (South Africa): Characteristics, driving forces and implications.
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
    Poster
2005
  • Engelbrcht N and M.J. Roberts (2005)
    Do embayments along the Eastern Cape coast offer santuaries for chokka squid (Loligo vulgaris reynaudii) paralarvae
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Hugget, J.A. et al (2005)
    Zooplankton studies in the South-West Indian Ocean: first results from ACEP
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract  Poster
  • Lamont, T., Barlow, R.G., Roberts, M.J. and C.P. Whittle (2005)
    Investigating the circulation of the Delagoa Bight using surface drifters and satellite sea surface temperature and chlorophyll-a concentration maps
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Martins, R.S, Roberts, M.J. and E.G. Vidal (2005)
    Developing a semi-closed culturing system for rearing hatchling chokka squid (Loligo vulgaris reynaudii).
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Mketsu, Q.K., Roberts, M.J. and V.N. Ndzipha (2005)
    The likely distribution range of coelacanth, Latimeria chalumnae Smith, 1939.
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Morris, T. and M.J. Roberts (2005)
    The Maputoland-Delagoa Bight cyclonic gyre - a potential spawning and nursery ground for transboundary fish stocks.
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Morris,T., Roberts, M.J. (2005)
    The Maputoland - Delagoa Bight Cyclonic Eddy - A potential spawning and nursary ground for transboundery fish stocks
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Poster
  • Oosthuizen, A. (2005)
    Success for squid eggs in cold, deep water?
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
  • Vidal, E.G., Martins, R.S. and M.J. Roberts (2005)
    Rearing of chokka squid (Loligo vulgaris reynaudii) paralarvae: growth, yolk utilization and metabolism.
    Abstracts of SAMSS Conference, 4 - 7 July 2005, Durban, South Africa.
    Abstract
2003
  • Morris,T., Roberts, M.J. et al (2003)
    A snap-shot of oceanography long the Maputaland shelf edge - habitat of the coelacanth (Latimeria chalumnae)
    Abstracts of Coastal and Ocean Exploration Conference, 28-31 October 2003, East London, South Africa.
    Abstract  Poster
2002
  • Morris,T. and M.J. Roberts (2002)
    Does a narrow coastal jet current exist off Tsitsikamma (Eastern Agulhas Bank) and what are the implications for larval Transport?
    Abstracts of Southern African Marine Science Symposium, SAMSS 2002 1-5 July 2002, Swakopmund, Namibia.
    Abstract
2000
  • Dorfler, K.A., Roberts, M.J. and D. Baird (2000)
    Benthic Turbidity Events and their Impact on Chokka Squid Spawning and Catches
    Abstracts of Cephalopod Biomass and Production, CIAC symposium 3-7 July 2000, Aberdeen, Scotland.
    Abstract  Poster
  • Oosthuizen, A., Roberts, M.J. and W.H.H. Sauer (2000)
    Temperature Effects on embryonic development and hatching success of squid Loligo vulgaris raynaudii eggs.
    Abstracts of Cephalopod Biomass and Production, CIAC symposium 3-7 July 2000, Aberdeen, Scotland.
    Abstract
  • Roberts, M. J. and M. van den Berg (2000)
    Recruitment variability of chokka squid - role of currents on the Agulhas Bank (South Africa) in paralarvae distribution and food abundance.
    Abstracts of Cephalopod Biomass and Production, CIAC symposium 3-7 July 2000, Aberdeen, Scotland.
    Abstract
1999
  • Dorfler, K., Roberts, M. J. and D. Baird (1999)
    The influence of benthic turbidity and surface waves on squid catches.
    Abstract of the 10th Southern African Marine Science Symposium, Wildeness, November 1999.
    Abstract
1996
  • Agenbag, J.J. and M.J. Roberts (1996)
    Variability of wind in the extreme southern Benguela region deduced from the Cape Agulhas pressure index.
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 22
  • Ansorge, I.J., Lutjeharms, J.R.E., Roberts, M.J., Cooper, J. and M. Roualt (1996)
    Variability of the eastern Agulhas Bank upwelling cell
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 23
    Abstract
  • Le Clus, F., Agenbag, J.J, Henning, H.F. and M.J. Roberts (1996)
    Interannual variability in windfield and commercial catch rates of Austroglossus pectoralis (Soleidae)
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 48.
    Abstract
  • Le Clus, F., Roberts, M.J. and HF Henning (1996)
    Implicatins for Austroglossus pectoralis (Soleidae) of seasonal changes in the thermal structure on the inner central Agulhas Bank
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p.49.
    Abstract
  • Oosthuizen, A., Roberts, M.J., Baird, D. and W. Sauer (1996)
    Chokka Squid spawning grounds: environemntal influences on the development and hatching success of chokka eggs.
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 55.
    Abstract
  • Roberts, M.J. Sauer, W.H.H., Van den Berg, M., Needham, N.N., van Rooyen, P., Oosthuizen, A. and L. Pakati (1996)
    Fisheries management: developing an environmentally driven-process coupled-predictive index for the South African chokka fishery.
    Proceedings of the Second World Fisheries Congress, Brisbane, Australia, July 1996: p. 65.
    Abstract
  • Sauer, W.H.H. and M.J. Roberts (1996)
    Squid fishers and scientists - creating a sybiotic environment.
    Proceedings of the Second World Fisheries Congress, Brisbane, Australia, July 1996: p. 66.
  • Van den Berg, M., Needham, N., Agenbag, J.J. and M.J. Roberts (1996)
    Seeking key indices to measure and model variability in the coastal wind and upwelling.
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 70.
    Abstract
  • van Rooyen, P., Roberts, M.J. and W Sauer (1996)
    The influence of the environment on chokka squid catches.
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 70.
    Abstract
1994
  • Roberts, M.J., du Toit, P. and W.H.H. Sauer (1994)
    Environmental impact on the development and survival of chokka squid eggs (Loligo vulgaris reynaudii)
    Abstracts of the CIAC'94 (The Behaviour and Natural History of Cephalopods) Symposium, Italy,June 1994: p:30
    Abstract
1993
  • J. Taunton-Clark and M.J. Roberts (1993)
    Variability in the nearshore physical environment of St Francis Bay on the South African south coast.
    Abstracts of the 8th Southern African Marine Science Symposium: Marine Science for a Sustainable Future, Langebaan, October 1993.
    Abstract

Conference Presentations

2008
  • Coetzee, J.C., Merkle, D.,Hutchings, L., van der Lingen, C.D.,van den Berg, M.A. and M.J. Roberts (2008)
    How many sardines in a sardine run and other interesting observations.
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Downey, N.J.and M.J. Roberts (2008)
    Determining the influence of upwelling on chokka squid spawning behaviour.
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Githaiga, J.M.W., Roberts, M.J. and M. Lucas (2008)
    What are nepheloids and nepheloids layers, where do you find them and who cares?
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Hancke, L. and M.J. Roberts (2008)
    Largrangian observations of the Tsitsikamma Coastal Current, South Africa
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Hutchings, L., Morris, T.,van der Lingen, C.D.,lamberth, S. and A.Connell (2008)
    Ecosystem considerations of the KZN sardine run
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Jacobs, Lee-Ann and M.J. Roberts (2008)
    The mechanics of a dipole eddy in the western Mozambique Channel and its influences on primary production
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Martins, S.M., Roberts, M.J., Vidal, A.G.V.and C.L. Moloney (2008)
    Effects of temperature on utulization of yolk by chokka squid (Loligo reynaudii) paralarvae
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Morris, T.,Roberts, M.J., Schleyer, M.H. and M.A. van den Berg (2008)
    Comparative temperature studies on coral reef communities in Sodwana Bay, South Africa
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
  • Roberts, M.J., van der Lingen, C.D., Coetzee, J.C. and M.A. van den Berg (2008)
    Oceanography of the Transkei shelf and its relevance to the Natal sardine run
    Abstracts of Southern African Marine Science Symposium, SAMSS , 29 June - 3 July 2008, Cape Town, South Africa.
2007
  • Hancke, L. and M.J. Roberts (2007)
    Ground-truthing mesoscale circulation features in the Mozambique Channel with satelitte tracked drifters
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
  • Morris, T., Lamont, T., Hancke, L., Engelbrecht, D.C. and M.J. Roberts (2007)
    Effects of a (dipole) eddy on the KwaZulu-Natal shelf.
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
  • Roberts, M.J. and L. Jacobs (2007)
    First observations of the shelf edge upwelling in the southern Mozambique (Inhambane Terrace): The interaction of an anti-cyclonic eddy with the continental slope
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
  • Roberts, M.J., Ribbink, A.J., Morris, T., van den Berg M.A., Engelbrecht, D.C. and R.T. Harding (2007)
    Oceanographic environment of the Sodwana Bay coelacanths (Latimeria chalumnae), South Africa.
    Abstracts of 5th Western Indian Ocean marine Science Association Scientific Symposium, 22 - 26 October 2007, Durban, South Africa.
2005
  • Duncan, F.A. and M.J. Roberts (2005)
    Defining oceanographic provinces of southern Africa with respect to temperature, oxygen and chlorophyll properties as well fish species distribution.
    Abstracts of Southern African Marine Science Symposium, SAMSS 2005 4-7 July 2005, Durban, South Africa.
    Abstract
  • M.J. Roberts (2005)
    Dynamics and influence of the Agulhas Current on the east coast shelf and coastal habitats.
    Abstracts of Southern African Marine Science Symposium, SAMSS 2005 4-7 July 2005, Durban, South Africa.
    Abstract
  • Roberts, M.J. and N. Downey (2005)
    Determining the influence of bottom turbidity and upwelling on chokka squid spawning behaviour.
    Abstracts of Southern African Marine Science Symposium, SAMSS 2005 4-7 July 2005, Durban, South Africa.
    Abstract
  • Sink, K., Hissman, K., Heemstra, P.C., Samaai, T., Roberts, M.J. and A Ribbink (2005)
    Coelacanths and the deep subtidal habitat of the Greater St Lucia Wetland Park
    Abstracts of Southern African Marine Science Symposium, SAMSS 2005 4-7 July 2005, Durban, South Africa.
    Abstract
2003
  • Burchell, L., Roberts, M.J. and P.W. Froneman (2003)
    Linking the coelacanth Latimeria chalumnae to its oceanographic environment.
    Abstracts of Coastal and Ocean Exploration Conference, 28 - 31 October 2003, East London, South Africa.
    Abstract
  • Roberts, M.J. and A.J. Ribbink (2003)
    Ocean currents or tectonic movement: Which is responsible for the distribution of the coelacanth Latimeria chalumnae in the South West Indian Ocean?
    Abstracts of Coastal and Ocean Exploration Conference, 28 - 31 October 2003, East London, South Africa.
    Abstract
2002
  • Roberts, M.J., Engelbrecht,N., Johnson,A., Nelson,G. and B.Spolander (2002)
    Semi permanent bottom cyclonic circulation on the edge of the eastern Agulhas Bank, The Plume Model, and implications for upwelling and kingklip spawning
    Abstracts of Southern African Marine Science Symposium, SAMSS 2002 1-5 July 2002, Swakopmund, Namibia.
    Abstract
2001
  • Hutchings, L., van der Lingen,C., Griffiths,M., ROBERTS,M.R., Beckley,L.E. and S.Sunby (2001)
    Spawning on the edge:spawning habits and nursery areas along the southern African coastline.
    In Scientific Programme and Book of Abstracts, 6th Indo-Pacific FishConference, Durban, 20-25th May 2001:p. 33-34.
    Abstract
2000
  • Roberts, M. J. (2000)
    Modeling recruitment of chokka squid - role of currents in paralarvae distribution and food
    Abstracts of Cephalopod Biomass and Production, CIAC 2000 symposium, 3-7 July 2000, Aberdeen, Scotland.
  • Schon, P-J, Sauer, W.H.H. and M.J. Roberts (2000)
    The relationship between environmental conditions and chokka squid Loligo vulgaris raynaudii catches: A simple "black box" approach.
    Abstracts of Cephalopod Biomass and Production, CIAC 2000 symposium, 3-7 July 2000, Aberdeen, Scotland.
    Abstract
1999
  • Oosthuizen, A., Roberts, M. J., Sauer, W. H. H. and D. Baird (1999)
    Temperature effects on embryonic development and hatching success of squid Loligo vulgaris reynaudii.
    Paper presented at the 10th Southern African Marine Science Symposium, Wildeness, November 1999.
    Abstract
1997
  • Booth, T., Sauer, W. and M.J. Roberts (1997)
    Spatial analysis of chokka squid Loligo vulgaris within a GIS framework
    Abstracts of the CIAC'97 International Symposium and Workshops on cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 45.
    Abstract
  • Oosthuizen, A., Roberts, M. J., Sauer, W. H. H. and D. Baird (1997)
    Chokka Squid spawning grounds:Environmental influences on the development and hatching success of chokka Loligo vulgaris reynaudii eggs.
    Abstracts of the CIAC'97 International Symposium and Workshops on cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 68.
    Abstract
  • Roberts, M.J. (1997)
    How can we predict major squid population trends and catches from environmental change?
    Abstracts of the CIAC'97 International Symposium and Workshops on cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 76-77.
    Abstract
  • Roberts, M.J. (1997)
    Quantification of squid spawning behaviour: design of an Underwater Video-Environmental-Acoustic telemetry System (UVEATS).
    Abstracts of the CIAC'97 International Symposium and Workshops on Cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 77.
    Abstract
  • Sauer, W.H.H., Augustyn, C.J., and M.J. Roberts (1997)
    Aspects of the life cycle of the chokka squid Loligo vulgaris reynaudii from the inshore spawning grounds and Agulhas Bank, South Africa.
    Abstracts of the CIAC'97 International Symposium and Workshops on Cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 83.
    Abstract
  • Schön, P-J., Roberts, M.J. and W.H.H. Sauer (1997)
    An investigation into the influence of the environment on chokka squid Loligo vulgaris reynaudii catches.
    Abstracts of the CIAC'97 International Symposium and Workshops on cephalopod Biodiversity , Ecology and Evolution, Cape Town, August-September 1997: 83.
    Abstract
1996
  • O'Dor, R.K., Andrade, Y., Roberts, M.J., Sauer, W.H.H., Smale, M. and D. Webber (1996)
    Upwelling impact on spawning behaviour of tracked Loligo vulgaris reynaudii.
    Abstracts of the Benguela Dynamics Symposium, Cape Town, November 1996: p. 54.
    Abstract
  • Roberts, M.J., Sauer, W.H.H. and M. Van den Berg (1996)
    The infleunce of the environment on spawning strategies of the South African chokka squid.
    Workshop on Tropical Cephalopod Fisheries Brisbane, Australia, August 1996: p. 6.
1995
  • Roberts, M.J., Agenbag, J.J., LeClus, F., Melo, Y., Mitchell-Innes, B.A. and J. Taunton-Clark (1995)
    The impact of climate change on the oceanography of the Agulhas Bank and its fisheries.
    Abstracts of the IGBP Conference on Global Environmental Change: Implications for Southern Africa, Pretoria, April 1995: 113-114.
    Abstract
1993
  • Boyd, A.J., Roberts, M.J., Verheye, H. and Taunton-Clark, J. (1993)
    The effect of currents on biota off South Africa's south and west coast:Selected case studies.
    Abstracts of the 8th Southern African Marine Science Symposium: Marine Science for a Sustainable Future, Langebaan, October 1993.
    Abstract
  • J. Taunton-Clark (1993)
    Coastal Sea Temperature variability between Port Nolloth and St Francis Bay.
    Abstracts of the 8th Southern African Marine Science Symposium: Marine Science for a Sustainable Future, Langebaan, October 1993.
    Abstract
  • Roberts, M.J. (1993)
    The cool ridge on the eastern Agulhas bank and its links to coastal upwelling.
    Abstracts of the 8th Southern African Marine Science Symposium: Marine Science for a Sustainable Future, Langebaan, October 1993.
    Abstract
  • Roberts, M.J. and W.H.H. Sauer (1993)
    The environment: The key to understanding the South African chokka squid Loligo vulgaris reynaudii fishery.
    Abstracts of the Southern Ocean Cephalopods Symposium, Cambridge, July 1993
    Abstract