02050nas a2200145   4500008004100000022001400041245008000055210006900135260001300204300001400217490000700231520160800238100001701846856004101863       1999                        eng d  a0003-347200aSearch behaviour and mate choice by female field crickets, Gryllus integer.0 aSearch behaviour and mate choice by female field crickets Gryllu  c1999 Dec  a1293-12980 v583 a<p>The search tactics that females might employ to find a suitable mate impose different cognitive demands on searchers and some theoretical models of search behaviour presuppose that females are able to recall encountered males and return to mate with a previously sampled individual. In this study, I exposed female field crickets, Gryllus integer, to male calls either sequentially or simultaneously from two speakers in a three-arm radial maze. Subjects that were exposed to the two calls in sequence and allowed to move to the location of each call returned, in the absence of any audible signal, to the location of the call initially encountered. Subjects allowed to walk to the location of only one of two simultaneously active speakers before playback of both calls was terminated were as likely to move, in the absence of any audible signal, to the never-active speaker as to the location of the other male call. These subjects were also more likely to search all three arms of the maze and searched for a longer time than females exposed to calls sequentially. Thus, female G. integer probably do not construct a spatial representation of the locations of potential mates from the calls of males that advertise concurrently. The results of this study suggest, however, that female G. integer are able to recall previously encountered males under some conditions and may potentially employ a search tactic that is more complicated than a simple instantaneous comparison of the qualities of males that are actively calling. Copyright 1999 The Association for the Study of Animal Behaviour.</p>
1 aWiegmann, DD  uhttps://bio.acousti.ca/sv/node/5845102105nas a2200157   4500008004100000022001300041245008000054210006900134260001600203300001200219490000700231520159800238100002401836700002101860856006601881       1999                        eng d  a0003347200aNutritional effects on male calling behaviour in the variable field cricket0 aNutritional effects on male calling behaviour in the variable fi  cJan-01-1999  a89 - 950 v573 a<p>In the variable field cricket,Gryllus lineaticeps, females prefer higher chirp rates and longer chirp durations in male calling song. Higher chirp rates are energetically more expensive to produce, but the energetic cost of calling does not vary with chirp duration. We tested the hypothesis that nutrition affects male chirp rate and chirp duration. Full-sibling brothers of similar age were placed on high- and low-nutrition feeding regimes. There was no effect of feeding regime on male weight; neither group showed a significant change in weight, and the two groups did not differ from each other in weight change. However, males on the high-nutrition feeding regime both called more frequently and called at higher chirp rates when they did call. The two groups did not differ in chirp duration, the duration of pulses within chirps or chirp dominant frequency. These results suggest that females select mates based on one nutrition-dependent call character (chirp rate) and one nutrition-independent call character (chirp duration). In addition, because males in the two groups did not show significant differences in weight change, and because males on the high-nutrition feeding regime engaged in energetically more expensive calling, these results suggest that males invest any excess energy above their basic maintenance requirements in the production of call types that increase their attractiveness to females. The absence of a relationship between body condition and calling song structure for males in the field may be a consequence of this pattern of energy allocation.</p>
1 aWagner, William, E.1 aHoback, W. Wyatt  uhttp://linkinghub.elsevier.com/retrieve/pii/S0003347298909642