Maternal care in a neotropical jumping spider (Salticidae)

Autor(es)

Vieira, C. ^[1] ; Romero, G. Q. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Posgrad Biol Anim, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Estadual Paulista UNESP, IBILCE, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ZOOLOGY; v. 276, n. 3, p. 237-241, NOV 2008.
• Citações Web of Science: 8

Resumo

Although female jumping spiders (Salticidae) often stay with their egg sacs, little is known about whether this behaviour is effective in improving offspring survival. Females of the jumping spider Psecas chapoda (Salticidae) typically stay above their egg sacs and under a plain silk cover, spun from edge to edge of bromeliad leaves. The objective of this paper is to test the hypothesis that the presence of the females above the egg sac increases egg survival. We experimentally manipulated females and silk cover in P. chapoda using three treatments: female and silk cover present (control), female removed and silk cover present and female and silk cover removed. The number and area of holes in the egg sac walls, which are likely to be damage caused by egg predators, were higher in the absence of spiders and spiders+silk cover than in controls. Additionally, the number of spiderlings and exuvia was lower in the absence of females and female+silk cover than in the control treatment. The number of important specialized predators of spider eggs (i.e. mantipids) that develop inside P. chapoda egg sacs did not differ among the treatments. To our knowledge, this is the first experimental study that effectively demonstrates maternal care in spiders of the family Salticidae. (AU)

• Processo FAPESP: 04/13658-5 - Associações entre aranhas e plantas: história natural, interações multitróficas e mutualismos
• Beneficiário: Gustavo Quevedo Romero
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 07/50716-1 - Cuidado maternal em Psecas chapoda (Araneae, Salticidae)
• Beneficiário: Camila Vieira Curti
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica