Detailed Information on Publication Record
2019
Silk versus venom: alternative capture strategies employed by closely related myrmecophagous spiders
MICHÁLEK, Ondřej, Milan ŘEZÁČ, Eva LÍZNAROVÁ, William SYMONDSON, Stanislav PEKÁR et. al.Basic information
Original name
Silk versus venom: alternative capture strategies employed by closely related myrmecophagous spiders
Authors
MICHÁLEK, Ondřej (203 Czech Republic, belonging to the institution), Milan ŘEZÁČ (203 Czech Republic), Eva LÍZNAROVÁ (203 Czech Republic, belonging to the institution), William SYMONDSON (826 United Kingdom of Great Britain and Northern Ireland) and Stanislav PEKÁR (703 Slovakia, guarantor, belonging to the institution)
Edition
Biological Journal of the Linnean Society, OXFORD, OXFORD UNIV PRESS, 2019, 0024-4066
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10600 1.6 Biological sciences
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 1.961
RIV identification code
RIV/00216224:14310/19:00107937
Organization unit
Faculty of Science
UT WoS
000461134900013
Keywords in English
Araneae; Callilepis; glands; Nomisia; prey capture; specialist
Tags
Tags
International impact, Reviewed
Změněno: 28/3/2020 13:39, Mgr. Marie Šípková, DiS.
Abstract
V originále
Predators that prey on dangerous species have evolved effective capture traits. In spiders, venom and silk represent distinct substances associated with prey capture. However, the use of such adaptations comes at a cost. Based on a possible trade-off, the use of only one effective capture mechanism should be optimized if a predator is to specialize on a single type of dangerous prey. We investigated hunting strategies in two Callilepis spp. and one Nomisia species, Nomisia exornata, closely related ant-eating spiders from the family Gnaphosidae. We hypothesized that specialized Callilepis spiders would adopt a more stereotyped capture strategy compared with less specialized Nomisia. We also expected that Callilepis would rely on only one subjugation mechanism. To test this, we compared their hunting efficacy and hunting strategies, with an emphasis on venom vs. silk utilization. Nomisia restrained ants with silk (then bit them), whereas Callilepis relied solely on its venom. This was also reflected in trophic traits connected with silk and venom utilization; Callilepis had larger venom glands than Nomisia, whereas Nomisia had more piriform silk glands than Callilepis. Callilepis was more effective because it subdued prey more quickly, presumably owing to ant-specific venom. Callilepis and Nomisia handled ants from two subfamilies with different degrees of success; Callilepis was more successful with Formicinae ants, whereas Nomisia handled Myrmicinae ants better. We show that sole reliance on venom allows Callilepis to be more efficient in overcoming ants than Nomisia, which uses both silk and venom. However, such specific adaptations might restrict specialized predators from exploiting alternative prey.
Links
| GA15-14762S, research and development project |
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