Arachnology: Scavenging by brown recluse spiders

  title={Arachnology: Scavenging by brown recluse spiders},
  author={Jamel S. Sandidge},
The brown recluse spider (Loxosceles reclusa) is a threat to humans and establishes huge populations in urban habitats throughout central North America — more than 2,000 of these spiders were recorded in a single house in Kansas. What do these spiders eat in order to build and maintain such numbers? Here I combine laboratory prey-choice experiments with observations of the behaviour of L. reclusa in houses to show that this spider prefers dead, scavenged prey over live prey. This finding may… Expand

Figures and Topics from this paper

Brown recluse spiders: A review of biology, life history and pest management
Historical accounts of pest management for L. reclusa populations and previous laboratory studies of biology and behavior are reviewed to discuss how current studies of urban ecology, biological control, and urban pest management contribute to the management of populations. Expand
Carrion Feeding By Spiderlings Of The Cob-Web Spider Theridion evexum (Araneae, Theridiidae)
It is shown that the theridiid Theridion evexum Keyserling 1884 stored dead insectan prey for up to one week prior to the emergence of spiderlings from the egg sac, and continued to feed spiderlings dead prey for six weeks until spiderlings molted to the fourth instar. Expand
Are brown recluse spiders, Loxosceles reclusa (Araneae, Sicariidae) scavengers? The influence of predator satiation, prey size, and prey quality
Overall, recluses preferred live prey over dead, but their choice was influenced by all three variables, and they were more likely to scavenge when presented with large live prey paired with dead prey of equal size than when presenting with small live and dead prey. Expand
Scavenging behavior in spitting spiders, Scytodes (Araneae: Scytodidae)
Spitting spiders show behavioral plasticity in securing prey, conserving resources when necessary, and scavenging of dead prey is exhibited across a wide spectrum of spiders including Scytodes Latreille 1804. Expand
Effect of architectural angularity on refugia selection by the brown spider, Loxosceles gaucho
  • A. A. Stropa
  • Biology, Medicine
  • Medical and veterinary entomology
  • 2010
Females of Loxosceles gaucho (Gertsch) (Araneae: Sicariidae) were found to prefer refugia with acute angles, which brings new information to the understanding of brown spider infestations in man‐made environments: refugial structures are likely to offer more protection for females and their offspring. Expand
Activity patterns of a synanthropic population of the brown recluse spider, Loxosceles reclusa (Araneae: Sicariidae), with observations on feeding and mating
Recorded diel and seasonal activity patterns and behavior of the brown recluse spider, Loxosceles reclusa Gertsch & Mulaik 1940, in a free-ranging synanthropic population in northwestern Illinois showed no consistent pattern observed in activity through these months. Expand
Nectar Feeding by Wandering Spiders on Cotton Plants
A cold anthrone test to detect the presence of ingested fructose, a plant-derived sugar, in wandering spiders occupying cotton plants, suggests that nectarivory is common for foliage wandering spiders and may contribute to fitness. Expand
The Impact of Scavenging Versus Predation on Weight Change and Survival of the Brown Recluse Spider Loxosceles reclusa (Araneae: Sicariidae)
Spiders fed pyrethroid-killed crickets had significantly lower survival than did spiders utilizing crickets exposed to all other treatments and L. reclusa had significantly greater weight gain feeding as predators than as scavengers. Expand
Insights into brown spider and loxoscelism
Molecular biology is being used to produce quantities of several of the most important venom molecules and has contributed to the study and understanding of their mechanism of action. Expand
Chemical Control of Spiders and Scorpions in Urban Areas
The chemical control of invertebrates that are regarded as pests has always been governed by the development of molecules with insects as their main target. The group of arachnids, which compriseExpand


An Infestation of 2,055 Brown Recluse Spiders (Araneae: Sicariidae) and No Envenomations in a Kansas Home: Implications for Bite Diagnoses in Nonendemic Areas
Considering the levels of infestations with no bites in the homes presented here, nonendemic areas in the United States, which typically lack recluse spider populations and have had zero to few verified specimens of the spider, do not have sufficient numbers of brown recluse spiders to make envenomation a likely scenario. Expand
Pollen Feeding in an Orb-Weaving Spider
Pollen, caught on the sticky spirals of Araneus diadematus orb webs, doubles the life expectancy of spiderlings and alters their web-spinning behavior, so that they spin more frequently than do fasting controls. Expand
J. Med. Entomol
  • J. Med. Entomol
  • 2002
Nature Rev. Neurosci
  • Nature Rev. Neurosci
  • 2001
J. Electron Microsc. (Tokyo)
  • J. Electron Microsc. (Tokyo)
  • 2000
J. Electron Microsc. (Tokyo)
  • J. Electron Microsc. (Tokyo)
  • 1993
Nat. Hist
  • Nat. Hist
  • 1993
J. Membr. Biol
  • J. Membr. Biol
  • 1985
Bull. Am. Mus. Nat. Hist
  • Bull. Am. Mus. Nat. Hist
  • 1983