DICT Reports & Scientific Publications

REPORTS

• Dyer Island Conservation Trust Decade of Achievement Report.
• DICT 2017 – 2019 Report

SHARKS

• Queiroz, N., Humphries, N.E., Couto, A., Vedor, M., da Costa, I., Sequeira, A.M.M., Mucientes, G., Santos, A.M., Abascal, F.J., Abercrombie, D.L., Abrantes, K., Acuña-Marrero, D., Afonso, A.S., Afonso, P., Anders, D., Araujo, G., Arauz, R., Bach, P., Barnett, A., Bernal, D., Berumen, M.L., Bessudo Lion, S., Bezerra, N.P.A., Blaison, A.V., Block, B.A., Bond, M.E., Bradford, R.W., Braun, C.D., Brooks, E.J., Brooks, A., Brown, J., Bruce, B.D., Byrne, M.E., Campana, S.E., Carlisle, A.B., Chapman, D.D., Chapple, T.K., Chisholm, J., Clarke, C.R., Clua, E.G., Cochran, J.E.M., Crochelet, E.C., Dagorn, L., Daly, R., Devia Cortés, D., Doyle, T.K., Drew, M., Duffy, C.A.J., Erikson, T., Espinoza, E., Ferreira, L.C., Ferretti, F., Filmalter, J.D., Fischer, G.C., Fitzpatrick, R., Fontes, J., Forget, F., Fowler, M., Francis, M.P., Gallagher, A.J., Gennari, E., Goldsworthy, S.D., Gollock, M.J., Green, J.R., Gustafson, J.A., Guttridge, T.L., Guzman, H.M., Hammerschlag, N., Harman, L., Hazin, F.H.V., Heard, M., Hearn, A.R., Holdsworth, J.C., Holmes, B.J., Howey, L.A., Hoyos, M., Hueter, R.E., Hussey, N.E., Huveneers, C., Irion, D.T., Jacoby, D.M.P., Jewell, O.J.D., Johnson, R., Jordan, L.K.B., Jorgensen, S.J., Joyce, W., Keating Daly, C.A., Ketchum, J.T., Klimley, A.P., Kock, A.A., Koen, K., Ladino, F., Lana, F.O., Lea, J.S.E., Llewellyn, F., Lyon, W.S., MacDonnell, A., Macena, B.C.L., Marshall, H., McAllister, J.D., McAuley, R., Meÿer, M.A., Morris, J.J., Nelson, E.R., Papastamatiou, Y.P., Patterson, T.A., Peñaherrera-Palma, C., Pepperell, J.G., Pierce, S.J., Poisson, F., Quintero, L.M., Richardson, A.J., Rogers, P.J., Rohner, C.A., Rowat, D.R.L., Samoilys, M., Semmens, J.M., Sheaves, M., Shillinger, G., Shivji, M., Singh, S., Skomal, G.B., Smale, M.J., Snyders, L.B., Soler, G., Soria, M., Stehfest, K.M., Stevens, J.D., Thorrold, S.R., Tolotti, M.T., Towner, A., Travassos, P., Tyminski, J.P., Vandeperre, F., Vaudo, J.J., Watanabe, Y.Y., Weber, S.B., Wetherbee, B.M., White, T.D., Williams, S., Zárate, P.M., Harcourt, R., Hays, G.C., Meekan, M.G., Thums, M., Irigoien, X., Eguiluz, V.M., Duarte, C.M., Sousa, L.L, Simpson, S.J., Southall E.J. and Sims, D.W. (2019) Global spatial risk assessment of sharks under the footprint of fisheries. Nature
• Jewell, O. J., Gleiss, A. C., Jorgensen, S. J., Andrzejaczek, S., Moxley, J. H., Beatty, S. J., Wikelski, M., Block, B. A. & Chapple, T. K. (2019) Cryptic habitat use of white sharks in kelp forest revealed by animal-borne video. Biology letters, 15(4), 20190085.
• Huveneers, C., Apps, K., Becerril-García, E. E., Bruce, B., Butcher, P. A., Carlisle, A. B., Chapple, T. , Christiansen, H. M., Cliff, G., Curtis, T. H., Daly-Engel, T. S., Dewar, H., Dicken, M. L., Domeier, M. L., Duffy, C. A. J., Ford, R., Francis, M. P., French, G. C. A., Galván-Magaña, F., García-Rodríguez, E., Gennari, E., Graham, B., Hayden, B., Hoyos-Padilla, E. M., Hussey, N. E., Jewell, O. J. D., Jorgensen, S. J., Kock, A. A., Lowe, C. G., Lyons, K., Meyer, L., Oelofse, G., Oñate-González, E. C., Oosthuizen, H., O’Sullivan, J. B., Ramm, K., Skomal, G., Sloan, S., Smale, M. J., Sosa-Nishizaki, O., Sperone, E., Tamburin, E., Towner, A. V., Wcisel, M. A., Weng, K. C. & Werry J. M. (2018) Future research directions on the ‘elusive’ white shark. Frontiers in Marine Science, 5, 455.
• French, G. C. A., Stürup, M., Rizzuto, S., Van Wyk, J. H., Edwards, D., Dolan, R. W., Wintner, S. P., Towner, A. V. & Hughes, W. O. H. (2017) The tooth, the whole tooth and nothing but the tooth: tooth shape and ontogenetic shift dynamics in the white shark Carcharodon carcharias. Journal of fish biology, 91(4), 1032-1047.
• Rogers, T. D., Cambiè, G., & Kaiser, M. J. (2017) Determination of size, sex and maturity stage of free swimming catsharks using laser photogrammetry. Marine biology, 164(11), 213.
• Towner, A. V., Leos‐Barajas, V., Langrock, R., Schick, R. S., Smale, M. J., Kaschke, T., Jewell, O. J. & Papastamatiou, Y. P. (2016) Sex‐specific and individual preferences for hunting strategies in white sharks. Functional Ecology, 30(8), 1397-1407.
• Chapple, T. K., Gleiss, A. C., Jewell, O. J., Wikelski, M., & Block, B. A. (2015) Tracking sharks without teeth: a non-invasive rigid tag attachment for large predatory sharks. Animal Biotelemetry, 3(1), 14.
• Dureuil, M., Towner, A. V., Ciolfi, L. G., & Beck, L. A. (2015) A computer-aided framework for subsurface identification of white shark pigment patterns. African journal of marine science, 37(3), 363-371.
• Jewell, O. J., Wcisel, M. A., Towner, A. V., Chivell, W., Van der Merwe, L., & Bester, M. N. (2014) Core habitat use of an apex predator in a complex marine landscape. Marine Ecology Progress Series, 506, 231-242.
• Jewell, O. J., Johnson, R. L., Gennari, E., & Bester, M. N. (2013) Fine scale movements and activity areas of white sharks (Carcharodon carcharias) in Mossel Bay, South Africa. Environmental biology of fishes, 96(7), 881-894.
• Towner, A. V., Wcisel, M. A., Reisinger, R. R., Edwards, D., & Jewell, O. J. (2013) Gauging the threat: the first population estimate for white sharks in South Africa using photo identification and automated software. PloS one, 8(6), e66035.
• Towner, A. V., Underhill, L. G., Jewell, O. J., & Smale, M. J. (2013) Environmental influences on the abundance and sexual composition of white sharks Carcharodon carcharias in Gansbaai, South Africa. PLoS one, 8(8), e71197.
• Jewell, O. J. D. (2012) Foraging ecology of white sharks Carcharodon carcharias at Dyer Island, South Africa (Master’s dissertation, University of Pretoria).
• Towner, A. V., Smale, M. J. & Jewell, O. J. (2012) Boat strike wound healing in the white shark (Carcharodon carcharias) global perspectives on the biology and life history of the white shark. In Domeier, M. L., editor, Global Perspectives on the Biology and Life History of the White Shark, chapter 6, pages 77- CRC Press.
• Towner, A.V. (2012) Great White Sharks (Carcharodon carcharias) in Gansbaai, South Africa: Environmental influences and changes over time: 2007–2011 (Master’s dissertation, University of Cape Town).
• Jewell, O. J., Wcisel, M. A., Gennari, E., Towner, A. V., Bester, M. N., Johnson, R. L. & Singh, S. (2011) Effects of smart position only (SPOT) tag deployment on white sharks Carcharodon carcharias in South Africa. PLoS One, 6(11), e27242.
• Wcisel, M., Chivell, W. & Gottfried, M. D. (2010) A potential predation attempt by a great white shark on an Indo-Pacific humpback dolphin. African Journal of Wildlife Research, 40(2), 184-188.
• Rooth, D., 2018, Assessment of elasmobranch diversity and relative abundance in Van Dyks Bay, South Africa using Baited Remote Underwater Video Systems (Bachelors thesis, Lund University).

CETACEANS 

• Vermeulen, E., Bouveroux, T., Plön, S., Atkins, S., Chivell, W., Cockcroft, V., Conry, D., Gennari, E., Hörbst, S., James, B. S., Kirkman, S., Penry, G., Pistorius, P., Thornton, M., Vargas-Fonseca, A., Elwen, S. H. & Kirkman, S. (2018) Indian Ocean humpback dolphin (Sousa plumbea) movement patterns along the South African coast. Aquatic Conservation: Marine and Freshwater Ecosystems, 28(1), 231-240.
• Vermeulen, E., Wilkinson, C., Thornton, M., Peters, I. & Findley, K. (2017) International Whaling Commission: South African southern right whale aerial survey.
• Vinding, K., Bester, M., Kirkman, S. P., Chivell, W. & Elwen, S. H. (2015) The use of data from a platform of opportunity (whale watching) to study coastal cetaceans on the southwest coast of South Africa. Tourism in Marine Environments, 11(1), 33-54.
• van der Linde, M. L., Eriksson, I. K. (2019) An assessment of sperm whale occurrence and social structure off São Miguel Island, Azores using fluke and dorsal identification photographs.  Marine Mammal Science.
• Carroll, E. L., Ott, P. H., McMillan, L. F., Galletti Vernazzani, B., Neveceralova, P., Vermeulen, E., Gaggiotti, O. E., Andriolo, A., Baker, C. S., Bamford, C., Best, P., Cabrera, E., Calderan, S., Chirife, A., Fewster, R. M., Flores, P. A. C.,Frasier, T., Freitas, T. R. O., Groch, K., Hulva, P., Kennedy, A., Leaper, R., Leslie, M. S., Moore, M., Oliveira, L., Seger, J., Stepien, E. N., Valenzuela, L. O., Zerbini, A. & Jackson, J. A. (2020) Genetic Diversity and Connectivity of Southern Right Whales (Eubalaena australis) Found in the Brazil and Chile–Peru Wintering Grounds and the South Georgia (Islas Georgias del Sur) Feeding Ground. Journal of Heredity, 111(3), 263-276.
• Vinding Petersen, K., 2016. Distribution, habitat use, and behaviour of cetaceans in the Greater Dyer Island area, Western Cape, South Africa (Doctoral dissertation, University of Pretoria).

PENGUINS

• Waller, L. (2011) The African Penguin (Spheniscus demersus): Conservation and Management Issues (Doctoral dissertation, University of Cape Town).

SEALS

• Wcisel, M. A, O’Riain, M. J., De Vos A. & Chivell W. (2014) The role of refugia in reducing predation risk for Cape fur seals by white. Behavioural ecology and sociobiology, 69(1), 127-138.
• Vinding, K., Christiansen, M., Hofmeyr, G. J., Chivell, W., McBride, R. & Bester, M. N. (2013) Occurrence of vagrant leopard seals, Hydrurga leptonyx, along the South African coast. African Journal of Wildlife Research, 43(1), 84-87.
• Wcisel, M. A. (2013) The effects white shark presence has on Cape fur seal movements at Geyser Rock, South Africa (Master’s dissertation, University of Cape Town).

SEABIRDS

• Cook, T. R., Jewell, O. J., Chivell, W. & Bester, M. N. (2012) An albino cape cormorant Phalacrocorax capensis. Marine Ornithology, 40, 72-73.

TURTLES

• Jewell, O. J. D. & Wcisel, M. A. (2012) A leatherback turtle stranding at Danger Point, Gansbaai, South Africa. South African Journal of Wildlife Research. 42(2) 147–150.

OUR SCHOLARLY GRADUATES

• Alison Towner – MSc Zoology, University of Cape Town
• Michelle Wcisel – MSc Zoology, University of Cape Town
• Oliver Jewell – MSc Zoology, University of Pretoria.
• Lauren Waller – PhD, University of Cape Town
• Katja Vinding-Petersen – PhD, University of Pretoria