![]() Matsuse IT, Takeda CM, Kamimura K, Yoshida M (1997) Tolerance of Latrodectus hasseltii (Araneae: Theridiidae) to low temperatures in Japan. Lettink M, Norbury G, Cree A, Seddon PJ, Duncan RP, Schwarz CJ (2010) Removal of introduced predators, but not artificial refuge supplementation, increases skink survival in coastal duneland. Leschen RAB, Marris JWM, Emberson RM, Nunn J, Hitchmough RA, Stringer IAN (2012) The conservation status of New Zealand Coleoptera. ![]() Kasumovic MM, Andrade MCB (2004) Discrimination of airborne pheromones by mate-searching male Western black widow spiders ( Latrodectus hesperus): species- and population-specific responses. Kahle D, Wickham H (2013) ggmap: spatial visualization with ggplot2. Jennings CT, McDaniel IN (1988) Latrodectus hespersus (Araneae: Theridiidae) in Maine. Hódar JA, Sánchez-Piñero F (2002) Feeding habits of the black widow spider Latrodectus lilianae (Araneae: Theridiidae) in an arid zone of south-east Spain. Hitchmough RA, Hoare JM, Jamieson H, Newman D, Tocher MD, Anderson PJ, Lettink M, Whitaker AH (2010) Conservation status of New Zealand reptiles, 2009. Garb JE, González A, Gillespie RG (2004) The black widow spider genus Latrodectus (Araneae: Theridiidae): phylogeny, biogeography and invasion history. N Z J Bot 38:235–244įorster LM, Kavale J (1989) Effects of food deprivation on Latrodectus hasselti Thorell (Araneae: Theridiidae), the Australian redback spider. Sci Conserv 123:1–34įerriera SM, McKinlay B (2000) Recent vegetation trends at the Cromwell Chafer Beetle Nature Reserve in Central Otago, New Zealand. ![]() Dissertation, University of Otagoįerriera SM, McKinlay B (1999) Conservation monitoring of the Cromwell chafer beetle ( Prodontria lewisii) between 19. īrignall-Theyer ME (1998) Potential vertebrate predators of the Cromwell chafer beetle, Prodontria lewisi. Document RE400/2013/492, Report for the Department of Conservationīivand R, Lewin-Koh N (2013) maptools: tools for reading and handling spatial objects. RE400/2011/277īarratt BIP, Ferguson CM, Barton DM, Philip BA (2013) Prodontria lewisii Broun (Coleoptera: Scarabaeidae): population monitoring laboratory rearing for translocation. Department of Conservation, Dunedin, New Zealand. ![]() J Insect Conserv 11:19–27īarratt BIP, Ferguson CM, Barton DM (2011) Prodontria lewisii Broun (Coleoptera: Scarabaeidae): population monitoring laboratory rearing and field establishment. J Stat Softw 12:1–42īarratt BIP (2007) Conservation status of Prodontria (Coleoptera: Scarabaeidae) species in New Zealand. Behav Ecol 14:531–538īaddeley A, Turner R (2005) spatstat: an R package for analyzing spatial point patterns. Ten of the 26 prey species recorded in webs were native, including McCann’s skink ( Oligosoma maccanni) the first record of skink predation by redback spiders in New Zealand.Īndrade MCB (2003) Risky mate search and male self-sacrifice in redback spiders. Redback spiders occupied a large portion of the habitat to which the Cromwell chafer beetles are restricted. lewisii cadavers were found in redback spider webs. We estimated a redback population of between 208 and 371 spiders, an average of between 2.57 and 4.58 spiders per hectare within the CCBNR, with maximum web densities ranging between 8.7 and 10.7 webs per hectare. During the 5 weeks between surveys, prey caught in half of the recorded spider webs were monitored each week. We surveyed the redback spider population over the entire reserve in October (spring) and December (summer) 2013, recording web occupants, web condition, and prey caught. Initially recorded in Central Otago in 1981, they were observed in 2012 preying on the endemic, nationally endangered Cromwell chafer beetle ( Prodontria lewisii Broun, 1904) in the species’ last occupied habitat, the 81 ha Cromwell Chafer Beetle Nature Reserve (CCBNR). Australian redback spiders ( Latrodectus hasseltii Thorell, 1870) are invasive, opportunistic predators that threaten New Zealand fauna.
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