References
- Attwood CG, Petersen SL, Kerwath SE. 2011. Bycatch in South Africa’s inshore trawl fishery as determined from observer records. ICES Journal of Marine Science 68: 2163–2174. doi: https://doi.org/10.1093/icesjms/fsr162
- Bass AJ, D’Aubrey JD, Kistnasamy N. 1976. Sharks of the east coast of Southern Africa. VI. The families Oxynotidae, Squalidae, Dalatiidae and Echinorhinidae. Investigational Report No. 45. Durban, South Africa: Oceanographic Research Institute.
- Bernard ATF, Gӧtz A, Parker D, Heyns ER, Halse SJ, Riddin NA, et al. 2014. New possibilities for research on reef fish across the continental shelf of South Africa. South African Journal of Science 110: 1–5. doi: https://doi.org/10.1590/sajs.2014/a0079
- Bowman A, Azzalini A. 2003. Computation aspects of nonparametric smoothing with illustrations from the sm library. Computational Statistics and Data Analysis 42: 545–560. doi: https://doi.org/10.1016/S0167-9473(02)00118-4
- Braccini JM, Gillanders BM, Walker TI. 2005. Sources of variation in the feeding ecology of the piked spurdog (Squalus megalops): implications for inferring predator–prey interactions from overall dietary composition. ICES Journal of Marine Science 62: 1076–1094. doi: https://doi.org/10.1016/j.icesjms.2005.04.004
- Branch G, Branch M, Beckley L, Griffiths C. 2017. Two oceans – a guide to the marine life of southern Africa. Cape Town, South Africa: Struik Nature.
- Burgess GH. 2002. Spiny dogfish (Squalus acanthias Linnaeus 1758). In: Collette BB, Klein-MacPhee G (eds), Fishes of the Gulf of Maine. Washington DC: Smithsonian Institution Press. pp 54–57.
- Campana SE, Gibson AJF, Marks L, Joyce W, Rulifson R, Dadswell M. 2007. Stock structure, life history, fishery and abundance indices for spiny dogfish (Squalus acanthias) in Atlantic Canada. Research Document No. 2007/089. Canada: Canadian Science Advisory Secretariat.
- Cappo M, Harvey E, Malcolm H, Speare P. 2003. Potential of video techniques to monitor diversity, abundance and size of fish in studies of marine protected areas. In: Beumer JP, Grant A, Smith DC (eds), World Congress on Aquatic Protected Areas Proceedings, August 2002, Cairns, Australia. Queensland, Australia: University of Queensland. pp 455–464.
- Carlson AE, Hoffmayer ER, Tribuzio CA, Sulikowski JA. 2014. The use of satellite tags to redefine movement patterns of spiny dogfish (Squalus acanthias) along the U.S. East Coast: implications for fisheries management. PLoS ONE 9: e103384. doi: https://doi.org/10.1371/journal.pone.0103384
- Chapman B, Hulthén K, Brodersen J, Nilsson A, Skov C, Hansson L, Brönmark C. 2012. Partial migration in fishes: causes and consequences. Journal of Fish Biology 81: 456–478. doi: https://doi.org/10.1111/j.1095-8649.2012.03342.x
- Clark CW, Levy DA. 1988. Diel vertical migrations by juvenile sockeye salmon and the antipredation window. The American Naturalist 131: 271–290. doi: https://doi.org/10.1086/284789
- Compagno LJV, Ebert DA, Cowley PA. 1991. Distribution of offshore demersal cartilaginous fish (Class: Chondrichthyes) off the west coast of southern Africa, with notes on their systematics. South African Journal of Marine Science 11: 43–139. doi: https://doi.org/10.2989/025776191784287664
- Compagno LJV, Dando M, Fowler S. 2005. Sharks of the world. Princeton, New Jersey: Princeton University Press.
- Crooks N, Babey L, Haddon WJ, Love AC, Waring CP. 2013. Sexual dimorphisms in the dermal denticles of the lesser spotted catshark, Scyliorhinus canicula (Linnaeus, 1758). PLoS ONE 8: e76887. doi: https://doi.org/10.1371/journal.pone.0076887
- Currie JC, Atkinson LJ, Sink KJ, Attwood CG. 2020. Long-term change of demersal fish assemblages on the inshore Agulhas Bank between 1904 and 2015. Frontiers in Marine Science 7: article 355. doi: https://doi.org/10.3389/fmars.2020.00355
- da Silva C, Bürgener MCR. 2007. South Africa’s demersal shark meat harvest. TRAFFIC Bulletin 21: 55–66.
- da Silva C, Booth AJ, Dudley SFJ, Kerwath SE, Lamberth SJ, Leslie RW, McCord ME et al. 2015. The current status and management of South Africa’s chondrichthyan fisheries. African Journal of Marine Science 37: 233–248. doi: https://doi.org/10.2989/1814232X.2015.1044471
- Dell’Apa A, Cudney-Burch J, Kimmel DG, Rulifson RA. 2014. Sexual segregation of spiny dogfish in fishery-dependent surveys in Cape Cod Massachusetts: potential management benefits. Transactions of the American Fisheries Society 143: 833–844. doi: https://doi.org/10.1080/00028487.2013.869257
- Dell’Apa A, Pennino MG, Bonzek CF. 2017. Modeling the habitat distribution of spiny dogfish (Squalus acanthias), by sex, in coastal waters of the northeastern United States. Fishery Bulletin (Washington DC) 115: 89–100. doi: https://doi.org/10.7755/FB.115.1.8
- De Vos L, Watson RGA, Gӧtz A, Attwood CG. 2015. Baited remote underwater video system (BRUVS) survey of chondrichthyan diversity in False Bay, South Africa. African Journal of Marine Science 37: 209–218. doi: https://doi.org/10.2989/1814232X.2015.1036119
- Ebert DA, van Hees KE. 2015. Beyond Jaws: rediscovering the ‘lost sharks’ of southern Africa. African Journal of Marine Science 37: 141–156. doi: https://doi.org/10.2989/1814232X.2015.1048730
- Ebert DA, Compagno LJV, Cowley PD. 1992. A preliminary investigation of the feeding ecology of squaloid sharks off the west coast of southern Africa. South African Journal of Marine Science 12: 601–609. doi: https://doi.org/10.2989/02577619209504727
- Ebert DA, Cowley PD, Compagno LJV. 2002. First records of the longnose spiny dogfish Squalus blainvillei (Squalidae) and the deep-water stingray Plesiobatis daviesi (Urolophidae) from South African waters. South African Journal of Marine Science 24: 355–357. doi: https://doi.org/10.2989/025776102784528538
- Ebert DA, Wintner SP, Kyne PM. 2021. An annotated checklist of the chondrichthyans of South Africa. Zootaxa 4947: 1–127. doi: https://doi.org/10.11646/zootaxa.4947.1.1
- Fitzpatrick C, McLean DL, Harvey ES. 2013. Using artificial illumination to survey nocturnal reef fish. Fisheries Research 146: 41–50. doi: https://doi.org/10.1016/j.fishres.2013.03.016
- Fordham S, Fowler SL, Coelho RP, Goldman K, Francis MP. 2016. Squalus acanthias. The IUCN Red List of Threatened Species 2016: e.T91209505A2898271.
- Gӧtz A, Kerwath SE, Attwood CG, Sauer WHH. 2009. Effects of fishing on a temperate reef community in South Africa 1: ichthyofauna. African Journal of Marine Science 31: 241–251. doi: https://doi.org/10.2989/AJMS.2009.31.2.12.884
- Grubbs RD. 2010. Ontogenetic shifts in movement and habitat use. In: Carrier JF, Musick JA, Heithhaus MR (eds), Sharks and their relatives II: biodiversity, adaptive physiology, and conservation. Boca Raton, Florida: CRC Press. 319–350.
- Harvey ES, Shortis MR. 1998. Calibration stability of an underwater stereo-video system: implications for measurement accuracy and precision. Marine Technology Society Journal 32: 3–17.
- Haugen JB, Curtis T, Fernandes P, Sosebee K, Rago PJ. 2017. Sexual segregation of spiny dogfish (Squalus acanthias) off the northeastern United States: implications for a male-directed fishery. Fisheries Research 193: 121–128. doi: https://doi.org/10.1016/j.fishres.2017.04.007
- Hedley J. 2003. VidAna 1.0: video analysis for cover estimation. Available at http://www.ex.ac.uk/msel/vidana.
- Heemstra PC, Heemstra E. 2004. Coastal fishes of southern Africa. Grahamstown, South Africa: National Inquiry Services Centre (NISC) and South African Institute for Aquatic Biodiversity.
- Holland D, Gudmundsson E, Gates J. 1999. Do fishing vessel buyback programs work: a survey of the evidence. Marine Policy 23: 47–69. doi: https://doi.org/10.1016/S0308-597X(98)00016-5
- Kerwath SE, Gӧtz A, Attwood CG, Sauer WHH, Wilke CG. 2007. Area utilisation and activity patterns of roman Chrysoblephus laticeps (Sparidae) in a small marine protected area. African Journal of Marine Science 29: 259–270. doi: https://doi.org/10.2989/AJMS.2007.29.2.10.193
- Labourgade P, Ballesta L, Huveneers C, Papastamatiou Y, Mourier J. 2020. Heterospecific foraging associations between reef-associated sharks: first evidence of kleptoparasitism in sharks. Movement Ecology 101: e03117.
- Langlois TJ, Harvey ES, Fitzpatrick B, Meeuwig JJ, Shedrawi G, Watson DL. 2010. Cost-efficient sampling of fish assemblages: comparison of baited video stations and diver video transects. Aquatic Biology 9: 155–168. doi: https://doi.org/10.3354/ab00235
- Langlois TJ, Fitzpatrick BR, Fairclough DV, Wakefield CB, Hesp SA, McLean DL et al. 2012. Similarities between line fishing and baited stereo-video estimations of length frequency: novel application of kernel density estimates. PLoS ONE 7: e45973. doi: https://doi.org/10.1371/journal.pone.0045973
- Last PR, Stevens JD. 1994. Sharks and rays of Australia. Melbourne, Australia: CSIRO.
- Lorenzen K, Steneck RS, Warner RR, Parma AM, Coleman FC, Leber KM. 2010. The spatial dimensions of fisheries: putting it all in place. Bulletin of Marine Science 86: 169–177.
- MacFarlane GA, King J. 2003. Migration patterns of spiny dogfish (Squalus acanthias) in the North Pacific Ocean. Fishery Bulletin 101: 358–367.
- Martinho F, Sá C, Falcão J, Cabral HN, Pardal MA. 2012. Comparative feeding ecology of two elasmobranch species, Squalus blainville and Scyliorhinus canicula, off the east coast of Portugal. Fishery Bulletin 110: 71–84.
- Musick JA, Burgess G, Cailliet G, Camhi M, Fordham S. 2000. Management of sharks and their relatives (Elasmobranchii). Fisheries 25: 9–13. doi: https://doi.org/10.1577/1548-8446(2000)025<0009:MOSATR>2.0.CO;2
- Papastamatiou YP, Watanabe YY, Demṧar U, Leos-Barajas V, Bradley D, Langrock R, et al. 2018. Activity seascapes highlight central place foraging strategies in marine predators that never stop swimming. Movement Ecology 6: article 9. doi: https://doi.org/10.1186/s40462-018-0127-3
- Pratt HL, Carrier JC. 2001. A review of elasmobranch reproductive behaviour with a case study on the nurse shark, Ginglymostoma cirratum. Environmental Biology of Fishes 60: 157–188. doi: https://doi.org/10.1023/A:1007656126281
- R Development Core Team. 2019. R: a language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing.
- R Studio Team. 2015. R Studio: integrated development environment for R. Boston, Massachusetts: RStudio, PBC. Available at http://www.rstudio.com.
- Sagarese SR, Frisk MG, Miller TJ, Sosebee KA, Musick JA, Rago PJ. 2014. Influence of environmental, spatial, and ontogenetic variables on habitat selection and management of spiny dogfish in the Northeast (U.S.) Shelf Large Marine Ecosystem. Canadian Journal of Fisheries and Aquatic Sciences 71: 567–580. doi: https://doi.org/10.1139/cjfas-2013-0259
- Shepherd T, Page F, Macdonald B. 2002. Length and sex-specific associations between spiny dogfish (Squalus acanthias) and hydrographic variables in the Bay of Fundy and Scotian Shelf. Fisheries Oceanography 11: 78–89. doi: https://doi.org/10.1046/j.1365-2419.2002.00191.x
- Shortis M, Harvey E, Seager J. 2007. A review of the status and trends in underwater videometric measurement. SPIE Videometrics 4: 1–26.
- Sims DW. 2003. Tractable models for testing theories about natural strategies: foraging behaviour and habitat selection of free-ranging sharks. Journal of Fish Biology 63: 53–73. doi: https://doi.org/10.1111/j.1095-8649.2003.00207.x
- Sims DW, Davies SJ, Bone Q. 1993. On the diel rhythms in metabolism and activity of post-hatching lesser spotted dogfish, Scyliorhinus canicula. Journal of Fish Biology 43: 749–754. doi: https://doi.org/10.1111/j.1095-8649.1993.tb01151.x
- Sims DW, Nash J, Morritt D. 2001. Movements and activity of male and female dogfish in a tidal sea lough: alternative behavioural strategies and apparent sexual segregation. Marine Biology 139: 1165–1175. doi: https://doi.org/10.1007/s002270100666
- Sims DW, Wearmouth VJ, Southall EJ, Hill JM, Moore P, Rawlinson K et al. 2006. Hunt warm, rest cool: bioenergetics strategy underlying diel vertical migration of a benthic shark. Journal of Animal Ecology 75: 176–190. doi: https://doi.org/10.1111/j.1365-2656.2005.01033.x
- Smale MJ. 1991. Occurrence and feeding of three shark species, Carcharhinus brachyurus, C. obscurus and Sphyrna zygaena, on the Eastern Cape coast of South Africa. South African Journal of Marine Science 11: 31–42. doi: https://doi.org/10.2989/025776191784287808
- Smale MJ. 2005. The diet of the ragged-tooth shark Carcharias taurus Rafinesque 1810 in the Eastern Cape, South Africa. African Journal of Marine Science 27: 331–335. doi: https://doi.org/10.2989/18142320509504091
- Speed CW, Field IC, Meekan MG, Bradshaw CJA. 2010. Complexities of coastal shark movements and their implications for management. Marine Ecology Progress Series 408: 275–293. doi: https://doi.org/10.3354/meps08581
- Stehlik LL. 2007. Spiny dogfish, Squalus acanthias, life history and habitat characteristics. NOAA Technical Memorandum NMFS-NE No. 203. Woods Hole, Massachusetts: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Northeast Region, Northeast Fisheries Science Center.
- Sulikowski JA, Galuardi B, Bubley W, Furey NB, Driggers WB, Ingram GW, Tsang PCW. 2010. Use of satellite tags to reveal the movements of spiny dogfish Squalus acanthias in the western North Atlantic Ocean. Marine Ecology Progress Series 418: 249–254. doi: https://doi.org/10.3354/meps08821
- Thomsen PF, Willerslev E. 2015. Environmental DNA – an emerging tool in conservation for monitoring past and present biodiversity. Biological Conservation 183: 4–18. doi: https://doi.org/10.1016/j.biocon.2014.11.019
- Venables WN, Ripley BD. 2002. Modern applied statistics with S (4th edn). New York: Springer.
- Viana STF, de Carvalho MR. 2016. Redescription of Squalus acutipinnis Regan, 1908, a valid species of spiny dogfish from southern Africa (Chondrichthyes: Squaliformes: Squalidae). Copeia 104: 539–553. doi: https://doi.org/10.1643/CI-14-217
- Viana STF, Lisher MW, de Carvalho MR. 2017. Two new species of short-snouted dogfish sharks of the genus Squalus Linnaeus, 1758, from southern Africa (Chondrichthyes: Squaliformes: Squalidae). Marine Biodiversity 48: 1787–1814. doi: https://doi.org/10.1007/s12526-017-0673-8
- Viana STF, de Carvalho MR. 2018. Resurrection and redescription of the southern dogfish Squalus probatovi (Squalidae), a valid species from Angola. Journal of Ichthyology 58: 617–632. doi: https://doi.org/10.1134/S003294521805020X
- Wand M. 2012. KernSmooth: functions for kernel smoothing supporting Wand & Jones (1995). R package version 2.23-8. Available at https://cran.r-project.org/web/packages/KernSmooth/index.html.
- Watson G, Smale MJ. 1999. Age and growth of the shortnose spiny dogfish Squalus megalops from the Agulhas Bank, South Africa. African Journal of Marine Science 21: 9–18. doi: https://doi.org/10.2989/025776199784126097
- Watson DL, Harvey ES, Fitzpatrick BM, Langlois TJ, Shedrawi G. 2010. Assessing reef fish assemblage structure: how do different stereo-video techniques compare? Marine Biology 157: 1237–1250. doi: https://doi.org/10.1007/s00227-010-1404-x
- Wickham H. 2016. ggplot2: elegant graphics for data analysis. Use R! Series. New York: Springer International.
- Wood AD, Brouwer SL, Cowley PD, Harrison TD. 2000. An updated checklist of the ichthyofaunal species assemblage of the Tsitsikamma National Park, South Africa. Koedoe 43: 83–95. doi: https://doi.org/10.4102/koedoe.v43i1.211
- Yano K, Tanaka S. 1988. Size at maturity, reproductive cycle, fecundity, and depth segregation of the deep squaloid sharks Centroscymnus owstoni and C. coelolepis in Suruga Bay, Japan. Nippon Suisan Gakkaishi 54: 167–174. doi: https://doi.org/10.2331/suisan.54.167
- Zuur AF, Hilbe J, Ieno EN. 2013. A beginner’s guide to GLM and GLMM with R: a frequentist and Bayesian perspective for ecologists. New York: Springer.