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Titolo:
SPATIOTEMPORAL VARIATION OF NATURAL AND SEXUAL SELECTION IN BREEDING POPULATIONS OF THE COREID BUG, COLPULA-LATIVENTRIS (HETEROPTERA, COREIDAE)
Autore:
NISHIDA T;
Indirizzi:
KYOTO UNIV,FAC AGR,ENTOMOL LAB KYOTO 60601 JAPAN
Titolo Testata:
Researches on population ecology
fascicolo: 2, volume: 36, anno: 1994,
pagine: 209 - 218
SICI:
0034-5466(1994)36:2<209:SVONAS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
MATING SUCCESS; INTERSPECIFIC COMPARISONS; LIFETIME DATA; STINK BUG; HEMIPTERA; VARIANCE; LYGAEIDAE; INTENSITY; BEHAVIOR;
Keywords:
NATURAL SELECTION; SEXUAL SELECTION; REPRODUCTIVE SUCCESS; SPATIOTEMPORAL VARIATION; COLPULA LATIVENTRIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
T. Nishida, "SPATIOTEMPORAL VARIATION OF NATURAL AND SEXUAL SELECTION IN BREEDING POPULATIONS OF THE COREID BUG, COLPULA-LATIVENTRIS (HETEROPTERA, COREIDAE)", Researches on population ecology, 36(2), 1994, pp. 209-218

Abstract

Spatio-temporal variations of lifetime reproductive succes (LRS) of both male and female individuals of a coreid bug Colpula lativentris were measured and analyzed using the multiple regression method of Arnold and Wade (1984a, b). The standardized variance of LRS was larger in males than that in females as males often to secure mates for a long period whereas females could easily find mates and oviposit simply dependent on ovarial maturation. LRS was partitioned into 4 consecutive fitness components: (1) reproductive lifespan, (2) copulating efficiency, (3) guarding efficiency (for males) or oviposition efficiency (for females), and (4) number of eggs per clutch. In males copulating efficiency was the largest determining factor of LRS, whereas in females reproductive lifespan was the most important factor. Such tendencies werestable on both a yearly and local basis. Patterns of relative contribution of natural selection (reproductive lifespan and number of eggs per clutch) and sexual selection (copulating efficiency and guarding oroviposition efficiency) to LRS were clearly different between males and females. This sexual difference is, at least to some extent, thought to be brought about by sexual selection among males for mating opportunity, though no physical fight was observed among males. Directionalselection on body length was found only in relation to the clutch size of females because larger females tended to lay larger clutches. No significant directional selection was found in other fitness components.

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Documento generato il 16/07/20 alle ore 04:17:47