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Artículos de revistas sobre el tema "Oceanography – Indian Ocean – Kwazulu-Natal"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 18 de febrero de 2022

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1

Green, Andrew, and Ron Uken. "Submarine landsliding and canyon evolution on the northern KwaZulu-Natal continental shelf, South Africa, SW Indian Ocean." Marine Geology 254, no. 3-4 (2008): 152–70. http://dx.doi.org/10.1016/j.margeo.2008.06.001.

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2

Green, A. N., M. Ovechkina, and R. Uken. "Nannofossil age constraints for the northern KwaZulu-Natal shelf-edge wedge: Implications for continental margin dynamics, South Africa, SW Indian Ocean." Continental Shelf Research 28, no. 17 (2008): 2442–49. http://dx.doi.org/10.1016/j.csr.2008.06.007.

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3

Green, Andrew N., John A. Goff, and Ron Uken. "Geomorphological evidence for upslope canyon-forming processes on the northern KwaZulu-Natal shelf, SW Indian Ocean, South Africa." Geo-Marine Letters 27, no. 6 (2007): 399–409. http://dx.doi.org/10.1007/s00367-007-0082-2.

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4

Hanzen, Céline, Martyn C. Lucas, Gordon O'Brien, Colleen T. Downs, and Sandi Willows-Munro. "African freshwater eel species (Anguilla spp.) identification through DNA barcoding." Marine and Freshwater Research 71, no. 11 (2020): 1543. http://dx.doi.org/10.1071/mf19390.

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Freshwater eels (Anguilla spp.) have a long and complex catadromous life cycle. This unique feature, coupled with difficulty in separating species based on morphology, makes them complex targets for conservation. In this study we evaluated the utility of DNA barcoding using cytochrome oxidase I (COI) to delimit the four species of African eels found in the western Indian Ocean region. We collected 76 individual fin clips from the four eel species (A. mossambica, n=51; A. marmorata, n=17; A. bengalensis, n=6; A. bicolor, n=2) in the rivers of KwaZulu–Natal, South Africa, in 2016–18. Phylogeneti

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5

Artetxe-Arrate, Iraide, Igaratza Fraile, David A. Crook, et al. "Otolith microchemistry: a useful tool for investigating stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean." Marine and Freshwater Research 70, no. 12 (2019): 1708. http://dx.doi.org/10.1071/mf19067.

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A better understanding of the stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean is needed to ensure the sustainable management of the fishery. In this study, carbon and oxygen stable isotopes (δ13C and δ18O) and trace elements (138Ba, 55Mn, 25Mg and 88Sr) were measured in otoliths of young-of-the-year (YOY) and age-1 yellowfin tuna collected from the Mozambique Channel and north-west Indian Ocean regions. Elemental profiles showed variation in Ba, Mg and Mn in YOY otolith composition, but only Mn profiles differed between regions. Differences in YOY near-core chemistry

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6

Beckley, Lynnath E., and Jeff M. Leis. "Occurrence of tuna and mackerel larvae (Family: Scombridae) off the east coast of South Africa." Marine and Freshwater Research 51, no. 8 (2000): 777. http://dx.doi.org/10.1071/mf00044.

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Spatial and temporal distribution patterns of scombrid larvae along the east coast of South Africa were investigated from ichthyoplankton collections made during May–June 1990 (winter), October 1990 (spring) and February 1991 (summer). Results were analysed in relation to oceanographic conditions and known spawning localities of tuna and mackerels in the western Indian Ocean. In total, eight species were represented in the samples, with highest diversity in February and lowest numbers in May–June. Larvae of the temperate chub mackerel Scomber japonicus were most abundant at shelf stations duri

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7

UIBLEIN, FRANZ, GAVIN GOUWS, MARK LISHER, and BERNARDINO S. MALAUENE. "Upeneus floros, a new goatfish from South Africa and Mozambique, with updated taxonomic accounts for U. guttatus and U. pori and a key to Western Indian Ocean Upeneus species (Mullidae)." Zootaxa 4834, no. 4 (2020): 523–55. http://dx.doi.org/10.11646/zootaxa.4834.4.3.

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The highly diverse goatfish genus Upeneus (Mullidae) requires enhanced attention regarding the possible occurrence of undescribed species in insufficiently explored regions. This study focuses on the South-Western Indian Ocean region (SWIO), and on the so-called japonicus-group, a taxonomic species group of Upeneus. Based on in-situ observations and collections in Sodwana Bay, KwaZulu-Natal, South Africa, the Floros goatfish, U. floros n. sp., is described. Detailed comparative studies of colour patterns and morphological characters of all other 13 japonicus-group species were undertaken as we

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8

Beal, Lisa M., Teresa K. Chereskin, Yueng D. Lenn, and Shane Elipot. "The Sources and Mixing Characteristics of the Agulhas Current." Journal of Physical Oceanography 36, no. 11 (2006): 2060–74. http://dx.doi.org/10.1175/jpo2964.1.

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Abstract Recent observations taken at four principal latitudes in the Agulhas Current show that the watermass properties on either side of its dynamical core are significantly different. Inshore of its velocity core are found waters of predominantly Arabian Sea, Red Sea, and equatorial Indian Ocean origin, while offshore waters are generally from the Atlantic Ocean, the Southern Ocean, and the southeast Indian Ocean. For the most part, the inshore waters approach the Agulhas Current through the Mozambique Channel, while those offshore are circulated within the southern Indian Ocean subtropical

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9

Oosthuizen, W. Chris, Marthán N. Bester, Cheryl A. Tosh, Christophe Guinet, Dominique Besson, and P. J. Nico de Bruyn. "Dispersal and dispersion of southern elephant seals in the Kerguelen province, Southern Ocean." Antarctic Science 23, no. 6 (2011): 567–77. http://dx.doi.org/10.1017/s0954102011000447.

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AbstractSouthern elephant sealsMirounga leoninawithin the Kerguelen province disperse between Marion Island (MI), Iles Crozet (IC) and Iles Kerguelen (IK) despite the high site fidelity characteristic of this species. From 1987–2002, 199 IC individuals, or 11.63% of the tagged population there, were resighted at MI. Resights of IC seals at MI peaked during the juvenile moult and seals aged 0–2 represent 66% of all resights made. Equal numbers of male and female seals (all age classes) were dispersing. Dispersing breeding females (n= 22, on 33 occasions) outnumbered dispersing breeding males (n

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10

Kaarsholm, Preben. "TRANSNATIONAL ISLAM AND PUBLIC SPHERE DYNAMICS IN KWAZULU-NATAL: RETHINKING SOUTH AFRICA'S PLACE IN THE INDIAN OCEAN WORLD." Africa 81, no. 1 (2011): 108–31. http://dx.doi.org/10.1017/s0001972010000069.

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ABSTRACTIslam in KwaZulu-Natal has typically been seen as an Indian preserve and as closely linked with contestations around South African Indian identities. Against this background, dedication to Islam among Africans has appeared as exceptional, represented by groupings with particular histories of immigration from Mozambique, Malawi or Zambia. Since the 1970s, strong efforts have been made to extend the call of Islam to Africans in the province, as demonstrated in the mobilization efforts of the Islamic Propagation Centre International and the Muslim Youth Movement, and in the dawah projects

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11

Magura, Judie, Roshila Moodley, and Sreekantha B. Jonnalagadda. "Chemical composition of selected seaweeds from the Indian Ocean, KwaZulu-Natal coast, South Africa." Journal of Environmental Science and Health, Part B 51, no. 8 (2016): 525–33. http://dx.doi.org/10.1080/03601234.2016.1170547.

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12

MISHEER, NATASHA, A. KINDNESS, and S. JONNALAGADDA. "Elemental Uptake by Seaweed, Plocamium corallorhirza Along the KwaZulu-Natal Coast of Indian Ocean, South Africa." Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes 41, no. 6 (2006): 1037–48. http://dx.doi.org/10.1080/03601230600808893.

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13

Hofmeyr, Isabel, Preben Kaarsholm, and Bodil Folke Frederiksen. "INTRODUCTION: PRINT CULTURES, NATIONALISMS AND PUBLICS OF THE INDIAN OCEAN." Africa 81, no. 1 (2011): 1–22. http://dx.doi.org/10.1017/s000197201000001x.

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ABSTRACTThe emergence of the Indian Ocean region as an important geo-political arena is being studied across a range of disciplines. Yet while the Indian Ocean has figured in Swahili studies and analyses of East and Southern African diasporic communities, it has remained outside the mainstream of African Studies. This introduction provides an overview of emerging trends in the rich field of Indian Ocean studies and draws out their implications for scholars of Africa. The focus of the articles is on one strand in the study of the Indian Ocean, namely the role of print and visual culture in cons

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14

Siebert, S. J., F. Siebert, and M. J. Du Toit. "The extended occurrence of Maputaland Woody Grassland further south in KwaZulu-Natal, South Africa." Bothalia 41, no. 2 (2011): 341–50. http://dx.doi.org/10.4102/abc.v41i2.77.

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The distinctiveness of Maputaland Woody Grassland lies within its richness of geoxylic suffrutices and herbaceous flora. Since it is well documented in the literature and easy to distinguish from other grassland types, it was possible to confirm a locality of this unique vegetation unit west of Richards Bay, where it probably forms the southernmost outlier population of this vegetation unit in the Indian Ocean Coastal Belt Biome. Phytosociological data obtained from the study area were analysed to identify plant communities and subsequent mapping units. Floristic gradients obtained through ord

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15

EBERT, DAVID A., and OFER GON. "Rhinobatos austini n. sp., a new species of guitarfish (Rhinopristiformes: Rhinobatidae) from the Southwestern Indian Ocean." Zootaxa 4276, no. 2 (2017): 204. http://dx.doi.org/10.11646/zootaxa.4276.2.3.

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Rhinobatos austini sp. n. is described from the southwestern Indian Ocean based on four specimens collected from the KwaZulu-Natal Province, South Africa and from Mozambique. The new species, with one exception, can be distinguished from all other members of this genus by a prominent teardrop-shaped dark blotch on the ventral surface of its snout. Its closest congener, R. holcorhynchus, also has a prominent teardrop-shaped blotch on its snout, but the new species differs from it by a lack of prominent thorns and tubercles on it dorsal disc surface and a very striking dorsal surface colour patt

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16

HADFIELD, KERRY A., NIEL L. BRUCE, and NICO J. SMIT. "Review of the fish-parasitic genus Cymothoa Fabricius, 1793 (Isopoda, Cymothoidae, Crustacea) from the southwestern Indian Ocean, including a new species from South Africa." Zootaxa 3640, no. 2 (2013): 152–76. http://dx.doi.org/10.11646/zootaxa.3640.2.2.

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The genus Cymothoa Fabricius, 1793 is revised for southwestern Indian Ocean waters. Cymothoa borbonica Schioedte & Meinert, 1884 and C. eremita Brünnich, 1783 are redescribed. Cymothoa rotundifrons Haller, 1880, from Mauritius lacks type material and the host is unknown, therefore it is here relegated to nomen dubium. Cymothoa sodwana sp. nov., from Trachinotus botla (Carangidae), collected from the Kwazulu-Natal coast of South Africa, is described and is distinguished by the large, ovoid, hunched body with rugose dorsal surfaces; the anterolateral angles of pereonite 1 are narrow and roun

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17

Harris, S. A., D. P. Cyrus, and L. E. Beckley. "Horizontal Trends in Larval Fish Diversity and Abundance Along an Ocean-Estuarine Gradient on the Northern KwaZulu-Natal Coast, South Africa." Estuarine, Coastal and Shelf Science 53, no. 2 (2001): 221–35. http://dx.doi.org/10.1006/ecss.2001.0803.

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18

Alexander, Jarryd, David A. Ehlers Smith, Yvette C. Ehlers Smith, and Colleen T. Downs. "Eco-estates: Diversity hotspots or isolated developments? Connectivity of eco-estates in the Indian Ocean Coastal Belt, KwaZulu-Natal, South Africa." Ecological Indicators 103 (August 2019): 425–33. http://dx.doi.org/10.1016/j.ecolind.2019.04.004.

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19

Green, A. N. "Palaeo-drainage, incised valley fills and transgressive systems tract sedimentation of the northern KwaZulu-Natal continental shelf, South Africa, SW Indian Ocean." Marine Geology 263, no. 1-4 (2009): 46–63. http://dx.doi.org/10.1016/j.margeo.2009.03.017.

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20

Emami-Khoyi, Arsalan, Rynhardt Le Roux, Matthew G. Adair, et al. "Transcriptomic Diversity in the Livers of South African Sardines Participating in the Annual Sardine Run." Genes 12, no. 3 (2021): 368. http://dx.doi.org/10.3390/genes12030368.

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During austral winter, the southern and eastern coastlines of South Africa witness one of the largest animal migrations on the planet, the KwaZulu-Natal sardine run. Hundreds of millions of temperate sardines, Sardinops sagax, form large shoals that migrate north-east towards the subtropical Indian Ocean. Recent studies have highlighted the role that genetic and environmental factors play in sardine run formation. In the present study, we used massively parallel sequencing to assemble and annotate the first reference transcriptome from the liver cells of South African sardines, and to investig

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21

Lane, Emily P., Morné de Wet, Peter Thompson, Ursula Siebert, Peter Wohlsein, and Stephanie Plön. "A Systematic Health Assessment of Indian Ocean Bottlenose (Tursiops aduncus) and Indo-Pacific Humpback (Sousa plumbea) Dolphins Incidentally Caught in Shark Nets off the KwaZulu-Natal Coast, South Africa." PLoS ONE 9, no. 9 (2014): e107038. http://dx.doi.org/10.1371/journal.pone.0107038.

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22

Van Bressem, MF, P. Duignan, JA Raga, K. Van Waerebeek, N. Fraijia-Fernández, and S. Plön. "Cranial crassicaudiasis in two coastal dolphin species from South Africa is predominantly a disease of immature individuals." Diseases of Aquatic Organisms 139 (April 30, 2020): 93–102. http://dx.doi.org/10.3354/dao03468.

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Crassicauda spp. (Nematoda) infest the cranial sinuses of several odontocetes, causing diagnostic trabecular osteolytic lesions. We examined skulls of 77 Indian Ocean humpback dolphins Sousa plumbea and 69 Indo-Pacific bottlenose dolphins Tursiops aduncus, caught in bather-protecting nets off KwaZulu-Natal (KZN) from 1970-2017, and skulls of 6 S. plumbea stranded along the southern Cape coast in South Africa from 1963-2002. Prevalence of cranial crassicaudiasis was evaluated according to sex and cranial maturity. Overall, prevalence in S. plumbea and T. aduncus taken off KZN was 13 and 31.9%,

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23

Miller, Charlotte, Jemma Finch, Trevor Hill, et al. "Late Quaternary climate variability at Mfabeni peatland, eastern South Africa." Climate of the Past 15, no. 3 (2019): 1153–70. http://dx.doi.org/10.5194/cp-15-1153-2019.

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Abstract. The scarcity of continuous, terrestrial, palaeoenvironmental records in eastern South Africa leaves the evolution of late Quaternary climate and its driving mechanisms uncertain. Here we use a ∼7 m long core from Mfabeni peatland (KwaZulu-Natal, South Africa) to reconstruct climate variability for the last 32 000 years (cal ka BP). We infer past vegetation and hydrological variability using stable carbon (δ13Cwax) and hydrogen isotopes (δDwax) of plant-wax n-alkanes and use Paq to reconstruct water table changes. Our results indicate that late Quaternary climate in eastern South Afri

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24

Artetxe-Arrate, Iraide, Igaratza Fraile, Cristophe Pecheyran, and Hilario Murua. "Natal signatures in otoliths of young-of-the-year yellowfin (Thunnus albacares) and skipjack (Katsuwonus pelamis) tuna from the Indian Ocean." Frontiers in Marine Science 6 (2019). http://dx.doi.org/10.3389/conf.fmars.2019.07.00086.

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25

Plön, Stephanie, Shanan Atkins, Vic Cockcroft, et al. "Science Alone Won’t Do It! South Africa’s Endangered Humpback Dolphins Sousa plumbea Face Complex Conservation Challenges." Frontiers in Marine Science 8 (July 29, 2021). http://dx.doi.org/10.3389/fmars.2021.642226.

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The Indian Ocean humpback dolphin (Sousa plumbea) is “endangered” with likely less than 500 animals remaining in South African waters. Established in 2016, the SouSA Consortium is a formalised network of scientists and conservationists to combine knowledge and research efforts, and make coordinated decisions with the aim of conserving the species. The first collaborative project collated available photo-identification data in an attempt to refine a national population estimate and investigate movements between research sites. This work was able to identify 250 uniquely marked individuals, with

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26

Simon, Margit H., Martin Ziegler, Joyce Bosmans, Stephen Barker, Chris J. C. Reason, and Ian R. Hall. "Eastern South African hydroclimate over the past 270,000 years." Scientific Reports 5, no. 1 (2015). http://dx.doi.org/10.1038/srep18153.

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Abstract Processes that control the hydrological balance in eastern South Africa on orbital to millennial timescales remain poorly understood because proxy records documenting its variability at high resolution are scarce. In this work, we present a detailed 270,000 year-long record of terrestrial climate variability in the KwaZulu-Natal province based on elemental ratios of Fe/K from the southwest Indian Ocean, derived from X-ray fluorescence core scanning. Eastern South African climate variability on these time scales reflects both the long-term effect of regional insolation changes driven b

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27

Haacke, W. D. "Variation in population size of Bouton’s snake-eyed skink (Reptilia: Scincidae) at Black Rock in northern KwaZulu-Natal, South Africa." Koedoe 45, no. 1 (2002). http://dx.doi.org/10.4102/koedoe.v45i1.14.

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Bouton’s snake-eyed skink Cryptoblepharus boutonii sp. occurs in scattered island or coastal populations in the Indian Ocean. The most southern known population occurs on Black Rock on the northern coast of KwaZulu-Natal. This tiny population was monitored over a period of 14 summer seasons and a final check was made 10 seasons later. This population consisted of an average of about 58 individuals, but has fluctuated by more than 100 %, suggesting that its existence is very tenuous. The re-check during October 2001 produced very positive figures, indicating that this population, observed over

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28

Jewitt, Debbie. "Vegetation type conservation targets, status and level of protection in KwaZulu-Natal in 2016." Bothalia 48, no. 1 (2018). http://dx.doi.org/10.4102/abc.v48i1.2294.

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Background: Systematic conservation planning aims to ensure representivity and persistence of biodiversity. Quantitative targets set to meet these aims provide a yardstick with which to measure the current conservation status of biodiversity features and measure the success of conservation actions.Objectives: The conservation targets and current ecosystem status of vegetation types and biomes occurring in KwaZulu-Natal (KZN) were assessed, and their level of formal protection was determined, to inform conservation planning initiatives in the province.Method: Land cover maps of the province wer

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29

Cole, Mary. "The Mollusc collections at South African institutions: Development and current status." South African Journal of Science 117, no. 7/8 (2021). http://dx.doi.org/10.17159/sajs.2021/8984.

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There are three major mollusc collections in South Africa and seven smaller, thematic collections. The KwaZulu-Natal Museum holds one of the largest collections in the southern hemisphere. Its strengths are marine molluscs of southern Africa and the southwestern Indian Ocean, and terrestrial molluscs of South Africa. Research on marine molluscs has led to revisionary papers across a wide range of gastropod families. The Iziko South African Museum contains the most comprehensive collections of Cephalopoda (octopus, squid and relatives) and Polyplacophora (chitons) for southern Africa. The East

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30

Plön, Stephanie, Christine Erbe, and Sabine Wintner. "Long-Term Demographic and Spatio-Temporal Trends of Indo-Pacific Bottlenose Dolphin (Tursiops aduncus) Bycatch in Bather Protection Nets off KwaZulu-Natal, South Africa." Frontiers in Marine Science 7 (December 24, 2020). http://dx.doi.org/10.3389/fmars.2020.542675.

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Bather protection nets have been in place off the coast of KwaZulu-Natal (KZN), South Africa, since the 1950’s. Besides sharks, they also catch a number of other marine vertebrates, including dolphins, the majority of which are Indo-Pacific bottlenose dolphins Tursiops aduncus. Previous analyses of dolphin bycatch in the nets indicated the potential impacts on the local populations, but a lack of information on population structure has to-date hindered a more detailed assessment. A recent re-assessment of the status and population delineations of T. aduncus off South Africa prompted a re-exami

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