Multiple feeding in wolf spiders: the effect of starvation on handling time, ingestion rate, and intercatch intervals in Lycosa lapidosa (Araneae : Lycosidae)

Multiple prey capture, the behaviour of a predator attacking prey whilst ha ndling a previously caught item, occurs in a variety of spiders that do not build webs. The effects of recent feeding history on the frequency of mult iple prey attacks, handling time, ingestion rate, and intercatch intervals were examined experimentally in the wolf spider Lycosa lapidosa McKay. Juve nile spiders were subjected to two different feeding regimes (starvation fo r 14 and 28 days) and then provided with two different prey types (blowflie s, Lucilia cuprina, and crickets, Acheta domestica). These two starvation l evels or prey types had little effect on the frequency (75%) of multiple pr ey attacks. Spiders ingested approximately half the weight of any captured prey, regardless of how many prey items they attacked. At the same time, th e handling time per prey item decreased with an increasing number of prey a ttacked. This indicates a more efficient ingestion rate when more prey are consumed. While the attacking time for the first prey was the same for all treatments, the first intercatch interval was longer for spiders that were starved longer. Chronically starved L. lapidosa appear to secure a previous ly caught item rather than optimise their capture rate by attacking further available prey.