A parental care-mating dilemma? Potential risks for offspring in the Pholcid spider when egg-carrying females accept mating

Authors
Calbacho Rosa, Lucía Soledad; Córdoba Aguilar, Alejandro; Munguía Steyer, Roberto; Peretti, Alfredo Vicente
Publication Year
2017
Language
English
Format
article
Status
Published version
Description
Many species face a trade-off between additional mating opportunities and the offspring benefits (viability, quality) provided by parental care. Female Holocnemus pluchei spiders must abandon their egg-sac, which they otherwise carry with their chelicerae, to copulate. This may involve risks for the offspring, such as predation and fungal infection. We assessed whether (1) males discriminate between egg-carrying females according to the egg development stage, (2) females are influenced by the egg development stage in regard to their proneness to mate, and (3) offspring are less likely to survive, due to high humidity and/or predation, in the absence of egg-carrying females. Apparently, males did not distinguish between females according to the developmental stage of the eggs they carried. However, females were more likely to mate when carrying relatively mature versus immature eggs (14–18 days and 3–6 days post-oviposition, respectively). All egg-sacs hatched successfully when guarded by egg-carrying females because this avoided both fungal infections (at high humidity) and cannibalism by conspecific spiders. Thus, H. pluchei females may face a trade-off between mating and parental care. Further research should clarify why egg-carrying females mate and how females prevent their egg-sacs from being infected by fungi.
Fil: Calbacho Rosa, Lucía Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Córdoba Aguilar, Alejandro. Universidad Nacional Autónoma de México; México
Fil: Munguía Steyer, Roberto. Universidad Nacional Autónoma de México; México
Fil: Peretti, Alfredo Vicente. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Subject
EGG SURVIVAL
EGG-CARRYING
HOLOCNEMUS PLUCHEI
MATERNAL CARE
PARENTAL CARE BENEFITS
SEXUAL SELECTION
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/56946