Males live longer with all-year mating.A year-round supply of lovely, available mates gives male butterflies but·ter·fly n. 1. Any of various insects of the order Lepidoptera, characteristically having slender bodies, knobbed antennae, and four broad, usually colorful wings. 2. on the island of Madeira something extra to live for--something that Swedish males don't have. Male Pararge aegeria butterflies live longer on Madeira, off the North African North Africa A region of northern Africa generally considered to include the modern-day countries of Morocco, Algeria, Tunisia, and Libya. North African adj. & n. Adj. 1. coast, than in Sweden, report Karl Gotthard of the University of Neuchatel in Switzerland and his colleagues. This difference fits predictions that organisms invest resources only where they pay off in reproductive success Reproductive success is defined as the passing of genes onto the next generation in a way that they too can pass those genes on. In practice, this is often a tally of the number of offspring produced by an individual. , the researchers comment in the January OECOLOGIA. In the balmy climate of Madeira, females of the species mature at any time during the year. The researchers found no difference in the life spans of males and females. In Sweden, however, females emerge from their cocoons and find mates in a synchronized syn·chro·nize v. syn·chro·nized, syn·chro·niz·ing, syn·chro·niz·es v.intr. 1. To occur at the same time; be simultaneous. 2. To operate in unison. v.tr. 1. burst. After those glory days, a male's chance of adding to his reproductive success drops to zero. Sure enough, the Swedish males die well before the females. |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion