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26-Apr-2020 09:28
In the cannibalistic nursery web spider, Pisaurina mira, the legs of mature males are longer in relation to their body size than those of females, and males use these legs to aid in wrapping a female's legs with silk prior to and during copulation.We hypothesized that elongated male legs and silk wrapping provide benefits to males, in part through a reduced likelihood of sexual cannibalism.
Why get bogged down with inconvenient registration pages when you don’t have to?From the point of view of an offender, there’s a lot more to being on the list than showing up in offender searches.Once a person is in the registry, he or she faces a thicket of reporting requirements lasting anywhere from five years to a lifetime.It's true, and according to this study, it has led to the evolution of males with longer legs to help restrain females.
In other words, an arms race--or to be more specific...a legs race.Offenders who are homeless in Kansas must report to local law enforcement every three days. How long you have to register for, and how difficult it is to get off the registry, varies greatly by state, as you can see from the map below.At the stricter end of the spectrum: All sex offenders in California and South Carolina must comply with registration requirements for life, regardless of the crimes committed.Benefits of size dimorphism and copulatory silk wrapping in the sexually cannibalistic nursery web spider, Pisaurina mira.