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Titolo:
PROTEIN-CONTENT OF SPERMATOPHORES IN RELATION TO MONANDRY POLYANDRY IN BUTTERFLIES
Autore:
BISSOONDATH CJ; WIKLUND C;
Indirizzi:
UNIV BRITISH COLUMBIA,DEPT ZOOL,6270 UNIV BLVD VANCOUVER BC V6T 1Z4 CANADA UNIV STOCKHOLM,DEPT ZOOL S-10691 STOCKHOLM SWEDEN
Titolo Testata:
Behavioral ecology and sociobiology
fascicolo: 6, volume: 37, anno: 1995,
pagine: 365 - 371
SICI:
0340-5443(1995)37:6<365:POSIRT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MALE NUTRIENT INVESTMENT; PAPILIO-MACHAON L; PATERNAL INVESTMENT; HELICONIUS BUTTERFLIES; REPRODUCTIVE OUTPUT; LEPIDOPTERA; LONGEVITY; INSECTS; MATINGS; SIZE;
Keywords:
LEPIDOPTERA; SPERMATOPHORE; PROTEIN; MATING SYSTEM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
C.J. Bissoondath e C. Wiklund, "PROTEIN-CONTENT OF SPERMATOPHORES IN RELATION TO MONANDRY POLYANDRY IN BUTTERFLIES", Behavioral ecology and sociobiology, 37(6), 1995, pp. 365-371

Abstract

The evolution of a mating system, and specifically mating frequency, is dependent on the costs and benefits to both sexes of mating once orseveral times. In butterflies, males transfer a spermatophore that contains both sperm and accessory gland products. Accessory gland-substances contain nutrients which, in some species, females use to increasetheir reproductive output and longevity. Nutrients contained in thesepackaged ejaculates represent investment by males in reproduction. Consequently, the nutritional composition of spermatophores may vary depending on the mating system. There are two lines of arguments concerning the evolution of the nutrient content of ejaculates. One hypothesisargues that male nuptial gifts evolved in the context of certainty ofpaternity and ease of finding mates; thus spermatophores of polyandrous males (with lower certainty of paternity and greater ease of finding mates) should contain less protein than those of monandrous males, since more spermatophores are produced on average. The other hypothesisargues that polyandry evolved in the context of maximization of male transfer of nutrients to females, and hence spermatophores of polyandrous males should contain more protein than those of monandrous males. In an attempt to distinguish between these two hypotheses, we determined how protein content of ejaculates varied with the degree of polyandry in nine species of pierid and two species of satyrid butterflies. We found that both relative ejaculate mass and protein content increased with the degree of polyandry. Hence our results are consistent with the view that polyandry has evolved in the context of male transfer ofnutrients to females, and provides another example of a male adaptation to multiple mating in butterflies.

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Documento generato il 28/11/20 alle ore 04:20:48