. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. _i i_ -1 1 ] I I I I I 50r 40 ^30 n O 20 10 29 (D ⢠r 'â¢â .! !â¢â¢ ⢠.⢠I J.; . ⢠19 Dec 29 18 Jan 28 17 Feb 27 19 Mar 29 18 Apr 28 Figure 14. NwML/W ratio and larval duration, colony 342. A. NwML/W ratio. The ratio of nonworkers plus males plus larvae/workers (ordinate) is plotted against time. 6. Duration of tlie larval stage. Each point represents a single larva. Its date of eclosion is given on the abscissa, and the number of days it required to spin its cocoon is given on the ordinate. Larvae that did not su
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. _i i_ -1 1 ] I I I I I 50r 40 ^30 n O 20 10 29 (D ⢠r 'â¢â .! !â¢â¢ ⢠.⢠I J.; . ⢠19 Dec 29 18 Jan 28 17 Feb 27 19 Mar 29 18 Apr 28 Figure 14. NwML/W ratio and larval duration, colony 342. A. NwML/W ratio. The ratio of nonworkers plus males plus larvae/workers (ordinate) is plotted against time. 6. Duration of tlie larval stage. Each point represents a single larva. Its date of eclosion is given on the abscissa, and the number of days it required to spin its cocoon is given on the ordinate. Larvae that did not survive to spin are not included. or absence from the nest, it is possible to construct life tables for the adult wasps. Several assumptions must first be made. 1) The terni "life span" as used here is defined as the span of time (in days) an individual is recorded on the nest. Death is probably the reason most workers dis- appear from the nest, but the same assump- tion may not be valid for nonworkers and males, since these may leave the nest on mating flights, and some, at least, of the nonworkers may subsequently found new colonies. 2) There were a number of individuals that were not seen on the nest beyond their first or second day. In view of the fact that normally an adult did not leave the nest during its first two to three days, the causes of such brief life spans are some- what suspect. It is possible that these wasps were damaged in the process of marking, or by the paint mark itself. Or they may have been sick or weak individu- als. Since there are no valid grounds for excluding them from the survivorship data, they are included. 3) Another problem arises with individu- als whose entire period on the nest was not observed, either because they had al- ready emerged when observations began or were still on the nest when observations ended. The average life span for such individuals was found not to be signifi- cantly different from the average fo
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
