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Titolo:
Nuptial gifts, resource budgets, and reproductive output in a polyandrous butterfly
Autore:
Karlsson, B;
Indirizzi:
Univ Stockholm, Dept Zool, S-10691 Stockholm, Sweden Univ Stockholm Stockholm Sweden S-10691 Zool, S-10691 Stockholm, Sweden
Titolo Testata:
ECOLOGY
fascicolo: 8, volume: 79, anno: 1998,
pagine: 2931 - 2940
SICI:
0012-9658(199812)79:8<2931:NGRBAR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEXUAL SIZE DIMORPHISM; MALE NUTRIENT INVESTMENT; CRYPTIC FEMALE CHOICE; PIERIS-NAPI L; ADULT DIET; BODY-SIZE; HELICONIINE BUTTERFLIES; PARENTAL INVESTMENT; PATERNAL INVESTMENT; MONANDRY POLYANDRY;
Keywords:
Lepidoptera; male donations; mating system; multiple matings; nutrient reserves; Pieridae; Pieris napi; polyandry; resource allocation; sexual selection; spermatophore;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
82
Recensione:
Indirizzi per estratti:
Indirizzo: Karlsson, B Univ Stockholm, Dept Zool, S-10691 Stockholm, Sweden Univ Stockholm Stockholm Sweden S-10691 91 Stockholm, Sweden
Citazione:
B. Karlsson, "Nuptial gifts, resource budgets, and reproductive output in a polyandrous butterfly", ECOLOGY, 79(8), 1998, pp. 2931-2940

Abstract

Many female insects receive material during mating, referred to as "nuptial gifts," that may increase the female's resource budget. This investigation examines how nuptial gifts influence female nitrogen and carbon budgets ina polyandrous butterfly, Pieris napi. During mating, a virgin male of thisspecies transfers a large and nutritious ejaculate containing 14% nitrogenby dry mass. The amount of nitrogen transferred is equivalent to that in similar to 70 eggs. Females use the male-transferred nutrients to increase their pool of nutrients used for egg production and show a positive relationship between amount of ejaculate material received and lifetime reproductive output. It is clear that for multiply mated females, nitrogen derived from male nuptial gifts is essential for a balanced nitrogen budget. As in earlier studies, female thorax mass decreased with age, indicating that old females of P. napi are able to use more of the resources from their thorax than young females. Since male-transferred material also increases female longevity, multiply mated females also use more of their resources from the thorax. Consequently, multiply mated females have a relatively higher reproductive investment than singly mated females, i.e., they transform a larger part of their body reserves to egg production. These results are important for studies that involve male-transferred nutrients in female life history patterns as well as for investigations of links between nuptial gifts and sexual selection theory. When the value of nuptial gifts is determined only on the nutritional value of the gift itself rather than the function within the female, there is an obvious risk for incorrect conclusions.

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Documento generato il 26/11/20 alle ore 14:15:51