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The mating strategy of phidippus johnsoni araneae salticidae 2. sperm competition and the function of copulation


, : The mating strategy of phidippus johnsoni araneae salticidae 2. sperm competition and the function of copulation. Journal of Arachnology 8(3): 217-240

The number and sequence of individual palp applications during copulation were highly variable. Copulation duration was correlated with different mating tactics: a. adult female outside nest, type 1 courtship (vision dependent), copulate outside nest (mean duration: 14 min); b. adult female inside nest, type 2 courtship (vibratory), copulate inside nest (110 min); c. subadult female inside, cohabitation, copulate inside nest after maturation of female (863 min). Females were more likely to oviposit fertile eggs after long copulations; but given that any fertile eggs were oviposited, there was no evidence that the number varied with copulation duration. Female fidelity (the probability that she would not mate when another male courted her) was greater after longer copulations. When females became unreceptive after mating, the effect was nearly immediate. Males covered the copulatory orifices of females with mating plugs that apparently hindered insemination attempts by later males. Females that mated with more than 1 male included some that were capable of ovipositing fertile eggs after their 1st copulation. The sterile male technique (X-radiation) was used to investigate the consequences of repeated mating. Sometimes the 2nd male failed to displace any of the 1st male's sperm. Other times, there was partial or complete displacement. Possible mechanisms controlling female receptivity and their adaptive significance are discussed.

US$19.90

DOI: 10.2307/3705003


Other references

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