A life history perspective on strategic mating effort in male scorpionflies

Engqvist L, Sauer KP (2002)
Behavioral Ecology 13(5): 632-636.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Engqvist, LeifUniBi ; Sauer, Klaus Peter
Abstract / Bemerkung
In species with high male mating effort, there is a trade-off between mating effort spent in a current mating and resources left for future matings. Consequently, to maximize their reproductive success, males have to invest strategically, saving resources in matings with low reproductive gain for future, more valuable matings. However, as males age, the expected future reproductive success constantly declines. Thus, the importance of resource rationing may drastically change during a lifetime. Males of the scorpionfly Panorpa cognata offer females a costly nuptial gift before copulation, which functions as male mating effort. Resources for the production of these salivary masses are severely limited for males in poor condition. We found that males invested more in copulations with high-quality females than in copulations with low-quality females. However, males ceased to discriminate as they became older. Old males, with a relative small number of expected future matings, did not invest differentially in copulations with high- versus low-quality females. In copulations with low-quality females, males invested more in late than in initial matings, whereas in matings with high-quality females, time of mating had no influence on mating effort. These results imply that males adaptively change their resource allocation strategy during the course of the season. Initial matings seem to be characterized by male prudence; in later matings, males seem to adopt a more opportunistic mating strategy.
Stichworte
scorpionflies; sperm competition; resource allocation; Panorpa; mating investment; sexual selection; nuptial gifts
Erscheinungsjahr
2002
Zeitschriftentitel
Behavioral Ecology
Band
13
Ausgabe
5
Seite(n)
632-636
ISSN
1045-2249
eISSN
1465-7279
Page URI
https://pub.uni-bielefeld.de/record/2395728

Zitieren

Engqvist L, Sauer KP. A life history perspective on strategic mating effort in male scorpionflies. Behavioral Ecology. 2002;13(5):632-636.
Engqvist, L., & Sauer, K. P. (2002). A life history perspective on strategic mating effort in male scorpionflies. Behavioral Ecology, 13(5), 632-636. doi:10.1093/beheco/13.5.632
Engqvist, L., and Sauer, K. P. (2002). A life history perspective on strategic mating effort in male scorpionflies. Behavioral Ecology 13, 632-636.
Engqvist, L., & Sauer, K.P., 2002. A life history perspective on strategic mating effort in male scorpionflies. Behavioral Ecology, 13(5), p 632-636.
L. Engqvist and K.P. Sauer, “A life history perspective on strategic mating effort in male scorpionflies”, Behavioral Ecology, vol. 13, 2002, pp. 632-636.
Engqvist, L., Sauer, K.P.: A life history perspective on strategic mating effort in male scorpionflies. Behavioral Ecology. 13, 632-636 (2002).
Engqvist, Leif, and Sauer, Klaus Peter. “A life history perspective on strategic mating effort in male scorpionflies”. Behavioral Ecology 13.5 (2002): 632-636.
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