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Nuptial gift size prolongs copulation duration in the dance fly Empis borealis
Author(s) -
SVENSSON BO G.,
PETERSSON ERIK,
FRISK MICHAEL
Publication year - 1990
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1990.tb00803.x
Subject(s) - spermatheca , biology , sperm , predation , zoology , mating , sperm competition , ecology , sexual conflict , botany
. 1. The time that pairs of the dance fly Empis borealis (L.) (Diptera: Empididae) spent in copula was positively correlated with the volume of the nuptial gift. 2. In some cases the copulation duration was short although prey volume was large. Females engaged in these matings had more worn wings, were therefore older, and most probably had sperm already stored in the spermatheca. It is suggested that these copulations were interrupted because either the spermatheca was full of sperm and the male was not able to transmit any sperm, or because prey content was depleted (males may have fed on the prey or the prey had been used in a previous mating). The latter explanation seemed more probable. 3. A male providing a large nuptial gift may transfer larger quantities of sperm. Quantitative sperm competition is more likely than last‐male sperm predominance.