Ecology and Evolution of the Pitcher-Plant Mosquito. 2. The Substructure of Fitness

Istock, Conrad A.; Zisfein, James; Vavra, Karen J.

doi:10.2307/2407577

Cited by 35 publications

(22 citation statements)

References 10 publications

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“…1993), i.e. animals with shorter generation times are genetically predisposed to enter dormancy later in the year, in accord with theoretical predictions (Istock et al . 1976; Taylor 1980).…”

Section: Response Of Animals To Recent Rapid Climate Changementioning

confidence: 99%

Genetic response to rapid climate change: it's seasonal timing that matters

2007

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The primary nonbiological result of recent rapid climate change is warming winter temperatures, particularly at northern latitudes, leading to longer growing seasons and new seasonal exigencies and opportunities. Biological responses reflect selection due to the earlier arrival of spring, the later arrival of fall, or the increasing length of the growing season. Animals from rotifers to rodents use the high reliability of day length to time the seasonal transitions in their life histories that are crucial to fitness in temperate and polar environments: when to begin developing in the spring, when to reproduce, when to enter dormancy or when to migrate, thereby exploiting favourable temperatures and avoiding unfavourable temperatures. In documented cases of evolutionary (genetic) response to recent, rapid climate change, the role of day length (photoperiodism) ranges from causal to inhibitory; in no case has there been demonstrated a genetic shift in thermal optima or thermal tolerance. More effort should be made to explore the role of photoperiodism in genetic responses to climate change and to rule out the role of photoperiod in the timing of seasonal life histories before thermal adaptation is assumed to be the major evolutionary response to climate change.

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Section: Response Of Animals To Recent Rapid Climate Changementioning

confidence: 99%

Genetic response to rapid climate change: it's seasonal timing that matters

2007

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“…Ifwe are to understand the adaptiveness of morphological and behavioral characters and their potential for evolutionary change, it is imperative that we begin to evaluate the relative contribution of genetic effects to the variance of characters as well as the mechanistic and quantitative relations of characters to fitness and to each other via linkage disequilibrium and pleiotropy. Data of this type have been slow in com-ing for natural populations (Istock et al, 1976;Derr, 1980;Giesel and Zettler, 1980;Arnold, 1981;Dingle and Hegmann, 1982) and, for practical reasons, may be nearly unattainable for many of the organisms upon which evolutionary ecologists have focused research.…”

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confidence: 99%

The Limits to Life History Evolution in Daphnia

Lynch¹

1984

Evolution

116

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“…Density-dependence is the rule in spring and probably late fall. Density-independence is the rule for a period of two to phenotypes from diapause prone, univoltine types to diapause resisting, multivoltine types (Istock et al, 1976). It is tempting to suggest that the univoltine types emerge in the second pulse of pupae and do not compete significantly with each other or the multivoltine types.…”

Section: Resultsmentioning

confidence: 99%

“…Of these ( 1) is not considered here, though a possible mechanism of density-dependent self-regulation through differential development, diapause and energy allocation among larvae of the same W. smithii cohort has been demonstrated (Istock et al, 1975). Question (2) is touched upon here, but has been taken up more extensively in general (Istock, 1970) as well as for the case of W. smithii (Istock et al, 1976) in other papers. Question (3) is the central issue of this paper.…”

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confidence: 99%