By Jay S. Rosenblatt, Robert A. Hinde, Colin Beer, Marie-Claire Busnel (Eds.)
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Extra resources for Advances in the Study of Behavior, Vol. 13
In such cases some authors have fallen back on reasonable assumptions and educated guesses (Kepler, 1977; Faaborg er a l . , 1980) and have favored the conclusion that participants are unrelated. Final conclusions cannot be drawn in such cases. Electrophoretic genetic methods or genealogical data on marked animals can provide reliable data and should be used. 6. Misunderstanding the Criterion. g.. Hamilton, 1964; Maynard Smith. 1965; D. S. Wilson, 1975; Wade, 1980) allow some donors to be unrelated to recipients.
Yearlings, however, show signs of adaptation to the helper status, for in some species, at least, their gonads are underdeveloped (Pomatostomus temporalis, J. Brown personal observation; J. J. Counsilman, personal communication). In these species the contribution to I is measurable (Brown and Brown, 1981b; Brown et a / . , 1982) and larger than in the case outlined in Section V,E,4. They correspond to level c in Fig. 2 and Table 111. 6 . A Eusocial Vertebrate The description by Jarvis of the astounding social system of the naked mole-rat (Heterocephalus glaber) ranks as one of the most exciting discoveries of vertebrate sociobiology.
The normal behavior of a male in these species, which are basically monogamous, is to feed its mate’s young. The situation in which nestlings are not the father’s is rare for males. To suppress feeding in such cases would require a special mechanism that seems largely unnecessary and possibly counterproductive; it might impair a male’s chance of obtaining the female or impair the feeding of his own young in the next brood. This explanation follows Weatherhead and Robertson. It follows from this interpretation that this helper situation is an unusual byproduct and not a suitable test case for studies of evolved aid-giving behavior.
Advances in the Study of Behavior, Vol. 13 by Jay S. Rosenblatt, Robert A. Hinde, Colin Beer, Marie-Claire Busnel (Eds.)