Allometry of reaching and contact structures in Kukulcania hibernalis (Araneae: Filistatidae). Issue 6 (11th September 2019)
- Record Type:
- Journal Article
- Title:
- Allometry of reaching and contact structures in Kukulcania hibernalis (Araneae: Filistatidae). Issue 6 (11th September 2019)
- Main Title:
- Allometry of reaching and contact structures in Kukulcania hibernalis (Araneae: Filistatidae)
- Authors:
- Barrantes, Gilbert
Madrigal‐Brenes, Ruth - Abstract:
- Abstract: Large part of the morphological diversity observed across taxa is attributed to the effect of sexual selection; and the static allometry of these structures vary largely from highly positive to negative, depending on their function, and position on the animal's body. In arthropods, information of how sexually selected contact and reaching male structures use during courtship scale on body size is scarce. We tested two complementary hypotheses: the reaching structure hypothesis and the contact‐function hypothesis, in the spider Kukulcania hibernalis . We used the length of the proximal segments of the male pedipalp to test the reaching structure hypothesis, and claw features to test the contact‐function hypothesis. Our results support both hypotheses. Small males have disproportionally longer pedipalps (highly negative allometry) than large males, increasing the probability of small‐bodied males to inseminate even large females. We also found that both distal contact and noncontact homologous structures scaled shallow (slope < 1) on body size, but allometry was significantly shallower for contact than for noncontact distal structures, providing support to the contact‐function hypothesis, and allowing teasing apart the effect of sexual selection on distal contact structures with dual functions. Abstract : The paper includes five figures. Figure 1 consists of two pictures showing part of the courtship behavior of Kukulcania hibernalis, while figure 2 shows theAbstract: Large part of the morphological diversity observed across taxa is attributed to the effect of sexual selection; and the static allometry of these structures vary largely from highly positive to negative, depending on their function, and position on the animal's body. In arthropods, information of how sexually selected contact and reaching male structures use during courtship scale on body size is scarce. We tested two complementary hypotheses: the reaching structure hypothesis and the contact‐function hypothesis, in the spider Kukulcania hibernalis . We used the length of the proximal segments of the male pedipalp to test the reaching structure hypothesis, and claw features to test the contact‐function hypothesis. Our results support both hypotheses. Small males have disproportionally longer pedipalps (highly negative allometry) than large males, increasing the probability of small‐bodied males to inseminate even large females. We also found that both distal contact and noncontact homologous structures scaled shallow (slope < 1) on body size, but allometry was significantly shallower for contact than for noncontact distal structures, providing support to the contact‐function hypothesis, and allowing teasing apart the effect of sexual selection on distal contact structures with dual functions. Abstract : The paper includes five figures. Figure 1 consists of two pictures showing part of the courtship behavior of Kukulcania hibernalis, while figure 2 shows the features of the claws that were included in the analyses. Figures 3 and 4 display the scaling of different appendages of females and males on body size. Figure 5 shows the proportion of protruding teeth for each leg of males and females. HIGHLIGHTS: We tested the effect of sexual selection on reaching and distal contact devices. Small males have disproportionally longer pedipalps to reach the copulatory opening of females. We teased apart the effect of a dual function effect on a distal contact device. … (more)
- Is Part Of:
- Evolution & development. Volume 21:Issue 6(2019)
- Journal:
- Evolution & development
- Issue:
- Volume 21:Issue 6(2019)
- Issue Display:
- Volume 21, Issue 6 (2019)
- Year:
- 2019
- Volume:
- 21
- Issue:
- 6
- Issue Sort Value:
- 2019-0021-0006-0000
- Page Start:
- 311
- Page End:
- 319
- Publication Date:
- 2019-09-11
- Subjects:
- Evolution (Biology) -- Periodicals
Developmental biology -- Periodicals
576.82 - Journal URLs:
- http://firstsearch.oclc.org/journal=1520-541x;screen=info;ECOIP ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1525-142X ↗
http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=ede ↗
http://www.blackwellpublishing.com/journal.asp?ref=1520-541X&site=1 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1111/ede.12318 ↗
- Languages:
- English
- ISSNs:
- 1520-541X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3834.215000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 14832.xml