The Chilean black urchin, Tetrapygus niger (Molina, 1782) in South Africa: gone but not forgotten

Mabin, Clova A.; Wilson, John R.; Robinson, Tamara B.

doi:10.3391/bir.2015.4.4.05

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…By interpreting this scheme in terms of marine invasions and providing guidance on the information required to place species within each category (Table 2), we provide a transparent tool for applying the standardised definitions to an updated list of marine alien species for South Africa (Appendices 1, 2). The list presented by Mead et al (2011) was updated by removing four species: the polychaete Hydroides elegans, which was reassigned as cryptogenic (Çinar 2013), the oyster Ostrea edulis and the urchin Tetrapygus niger, which were removed from the list following a resurvey of the mariculture dams where they were previously recorded and which showed that these populations no longer exist (Mabin et al 2015), and the dune plant Ammophila arenaria (because this group is covered in terrestrial lists). In addition, six species were added to the list: the barnacle Austrominius modestus (Sandison 1950), the amphipod Ericthonius difformis (Peters et al 2014), the crab Pinnixa occidentalis (Clark and Griffiths 2012), the polychaete Polydora cf.…”

Section: Development Of Standard Terms and A Marine Interpre Tation Of The Blackburn Et Al (2011) Frameworkmentioning

confidence: 99%

Lost in translation? Standardising the terminology used in marine invasion biology and updating South African alien species lists

Robinson

Alexander

Simon

et al. 2016

African Journal of Marine Science

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Section: Development Of Standard Terms and A Marine Interpre Tation Of The Blackburn Et Al (2011) Frameworkmentioning

confidence: 99%

Lost in translation? Standardising the terminology used in marine invasion biology and updating South African alien species lists

Robinson

Alexander

Simon

et al. 2016

African Journal of Marine Science

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“…5). Despite originating from only a few zoo escapees, 330 individuals were counted during a survey in the 1970s (Lloyd 1975;Skead et al 2011). The broad dietary preferences of these animals, along with their tendency to aggregate, resulted in significant environmental degradation and erosion at high densities (Lloyd 1975).…”

Section: Mammalsmentioning

confidence: 99%

“…Despite originating from only a few zoo escapees, 330 individuals were counted during a survey in the 1970s (Lloyd 1975;Skead et al 2011). The broad dietary preferences of these animals, along with their tendency to aggregate, resulted in significant environmental degradation and erosion at high densities (Lloyd 1975). As such, the authorities in charge of Table Mountain (Department of Nature and Environmental Conservation, now CapeNature, followed by SANParks from 1998), have conducted Himalayan Tahr removal programmes since the early 1970s, with the view to restoring populations of native ungulates in their place (Lloyd 1975;Gaertner et al 2016).…”

Section: Mammalsmentioning

confidence: 99%

“…The broad dietary preferences of these animals, along with their tendency to aggregate, resulted in significant environmental degradation and erosion at high densities (Lloyd 1975). As such, the authorities in charge of Table Mountain (Department of Nature and Environmental Conservation, now CapeNature, followed by SANParks from 1998), have conducted Himalayan Tahr removal programmes since the early 1970s, with the view to restoring populations of native ungulates in their place (Lloyd 1975;Gaertner et al 2016). Public concerns over animal welfare of the tahrs have received significant media attention over the years (Gosling 2002;Skead et al 2011).…”

Section: Mammalsmentioning

confidence: 99%

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Experience and Lessons from Alien and Invasive Animal Control Projects in South Africa

Davies

Jordaan

Karsten

et al. 2020

Biological Invasions in South Africa

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South Africa has a rich history of managing invasive alien animal populations. This chapter explores examples of animal control projects, their resourcing and degree of success or failure. Out of 1023 alien animal species present in South Africa, 80 are designated for compulsory control or eradication in national legislation, and 24 are currently being controlled with the aim of eradication or containment. Only two species have been successfully eradicated from mainland SA and its near-shore islands: Otala punctata (the Freckled Edible Snail) and Trogoderma granarium (the Khapra Beetle). These two projects took place in the late 1980s and early 1990s, and were rapid responses by small groups of role players to small infestations. In contrast, most current projects are larger, involving complex stakeholder management and considerable technical complexity. Three further invertebrate species are currently controlled through integrated pest management (Bactrocera dorsalis, the Oriental Fruit Fly) or nest removal (Vespula germanica, the German Wasp and Polistes dominula, the European Paper Wasp). No marine species are currently subject to control. Among vertebrates, 12 freshwater fish species have been controlled in localised areas, according to their specific listing in legislation and protected area management priorities; two amphibian, two bird and five mammal species are currently subject to control using a wide variety of techniques. Inter-institutional working groups have played a significant role in promoting the success of invasive alien species management in South Africa. Three working groups are actively addressing new and existing invasions, and promoting awareness and cooperation among a wide range of organisations, as well as recording the experience and learning of these groups.

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“…South Africa has, under the Alien and Invasive Species Regulations of 2014 under the National Environmental Management Biodiversity Act of 2004 (RSA 2014), committed to producing a national status report on biological invasions every three years (Wilson et al 2017). The status of marine invasions in South Africa has recently been reviewed (Robinson et al 2016), and there have been notable changes to the status of some species: for example, the urchin Tetrapygus niger is no longer present (Mabin et al 2015), whereas various alien fouling species have increased their ranges (Peters et al 2017). Here, we focus on the European shore-crab Carcinus maenas.…”

mentioning

confidence: 99%

Reassessing the invasion of South African waters by the European shore-crabCarcinus maenas

Mabin

Wilson

Roux

et al. 2017

African Journal of Marine Science

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The European shore-crab Carcinus maenas has been present in South Africa since 1983. Despite this species' international reputation as a biological invader, its distribution in this region has only been considered by three outdated 'snapshot surveys.' The present study is the most comprehensive to date, providing an update on the species' range and the first temporal assessment of its abundance and demographics. Along South Africa's Cape Peninsula and surrounding areas, C. maenas was absent from 12 intertidal sites surveyed, except for Sea Point, and no crabs were found during subtidal surveys along the open coastline. Subtidal harbour populations were recorded in the Cape Town harbours of Table Bay and Hout Bay (previously estimated as comprising approximately 164 200 and 6 500 individuals, respectively). Table Bay was surveyed monthly for one year, using baited traps, crab condos and postlarvae settlement collectors, to assess size distributions and reproductive seasonality of the crab. Reproductive females were recorded throughout most of the year. These results suggest that the harbour populations could be targeted by control programmes, but provide no strong evidence to support the initiation of management action during a particular season. The lack of detection of postlarval settlement, even among well-established populations, suggests this will not be a useful monitoring tool for detecting incursions.

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The Chilean black urchin, Tetrapygus niger (Molina, 1782) in South Africa: gone but not forgotten

Cited by 7 publications

References 16 publications

Lost in translation? Standardising the terminology used in marine invasion biology and updating South African alien species lists

Lost in translation? Standardising the terminology used in marine invasion biology and updating South African alien species lists

Experience and Lessons from Alien and Invasive Animal Control Projects in South Africa

Reassessing the invasion of South African waters by the European shore-crabCarcinus maenas

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