Przibram's Rule and male body‐size dimorphism in <i>Zygoballus rufipes</i> (Araneae: Salticidae)

Faber, Dean B.

doi:10.1111/j.1469-7998.1994.tb01568.x

Cited by 5 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Details are provided in the original paper. According to Faber (1994), the histogram of body weight is consistent with a model under which the adult male population is composed of two distinct, normally distributed body-size classes (morphs). In this case, the degree of overlap between the two classes appears to be small.…”

Section: An Examplesupporting

confidence: 52%

“…Everitt & Hand, 1981). Following Faber (1994), we will assume that the distribution of weight within the earlier instar is normal with mean p and variance a : and that the distribution of weight within the later instar is also normal with mean 8p (8 b 1) and variance 0;. The parameters p, p, 8, a:, and a; are all assumed to be unknown.…”

Section: A Test Of Przibram's Rulementioning

confidence: 99%

“…The test outlined before was applied to the body weights of 86 adult male specimens of Zygoballus rufipes. These are the same data analysed by Faber (1994). Details are provided in the original paper.…”

Section: An Examplementioning

confidence: 99%

“…In this case, the degree of overlap between the two classes appears to be small. In his original analysis, Faber (1994) assigned the 62 individuals less than 6 mg in weight to one class and the remaining 24 individuals to the second class.…”

Section: An Examplementioning

confidence: 99%

“…Przibram's Rule states that 8 = 2.09 (Przibram & Meguiar, 1912). In a recent paper, Faber (1994) described a test of Przibram's Rule and applied it to adult males of the jumping spider Zygoballus rufipes. Faber's approach proceeds in two stages.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A test of Przibram's Rule

Solow

Faber²

1995

Journal of Zoology

View full text Add to dashboard Cite

Przibram's Rule states that the ratio of the mean weights in successive instars of hemimetabolous insects is 2.09. Faber (1994) described a two‐stage approach to testing Przibram's Rule when the instars of the measured individuals are unknown. In the first stage, individuals are assigned to one of the instars on the basis of their weights. In the second stage, a test of the null hypothesis that the means of logarithmic weight in the two groups differ by the logarithm of 2.09 is performed. This approach suffers from two problems. First, errors in assigning individuals to instars will exaggerate the difference between instars. Secondly, the validity of the test in the second stage is based on the implicit assumption that the variance of logarithmic weight in the two groups is equal. This note describes a test of Przibram's Rule that avoids these problems.

show abstract

Section: An Examplesupporting

confidence: 52%

Section: A Test Of Przibram's Rulementioning

confidence: 99%

Section: An Examplementioning

confidence: 99%

Section: An Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A test of Przibram's Rule

Solow

Faber²

1995

Journal of Zoology

View full text Add to dashboard Cite

show abstract

Sexual selection research on spiders: progress and biases

2005

View full text Add to dashboard Cite

The renaissance of interest in sexual selection during the last decades has fuelled an extraordinary increase of scientific papers on the subject in spiders. Research has focused both on the process of sexual selection itself, for example on the signals and various modalities involved, and on the patterns, that is the outcome of mate choice and competition depending on certain parameters. Sexual selection has most clearly been demonstrated in cases involving visual and acoustical signals but most spiders are myopic and mute, relying rather on vibrations, chemical and tactile stimuli. This review argues that research has been biased towards modalities that are relatively easily accessible to the human observer. Circumstantial and comparative evidence indicates that sexual selection working via substrate-borne vibrations and tactile as well as chemical stimuli may be common and widespread in spiders. Pattern-oriented research has focused on several phenomena for which spiders offer excellent model objects, like sexual size dimorphism, nuptial feeding, sexual cannibalism, and sperm competition. The accumulating evidence argues for a highly complex set of explanations for seemingly uniform patterns like size dimorphism and sexual cannibalism. Sexual selection appears involved as well as natural selection and mechanisms that are adaptive in other contexts only. Sperm competition has resulted in a plethora of morphological and behavioural adaptations, and simplistic models like those linking reproductive morphology with behaviour and sperm priority patterns in a straightforward way are being replaced by complex models involving an array of parameters. Male mating costs are increasingly being documented in spiders, and sexual selection by male mate choice is discussed as a potential result. Research on sexual selection in spiders has come a long way since Darwin, whose spider examples are reanalysed in the context of contemporary knowledge, but the same biases and methodological constraints have persisted almost unchanged through the current boom of research.

show abstract

No association between sexual size dimorphism and life histories in spiders

Prenter¹,

Elwood²,

Montgomery³

1998

Proc. R. Soc. Lond. B

View full text Add to dashboard Cite

In spiders, females are commonly larger than males. The majority of hypotheses that attempt to explain sexual size dimorphism in spiders concentrate on reduction in male size, although there is evidence to suggest that the independent evolution of marked sexual size dimorphism and reversion to a less extreme dimorphic state has occurred several times. Recent debate has centred on two con£icting hypotheses involving male dwar¢sm and increased female size through fecundity selection, and has focused on the golden orb-weaving spider, Nephila clavipes (Tetragnathidae), and its relatives. In Nephila, males are tiny in comparison to females, however, other orb-web spiders do not show such extremes in dimorphism. Here, we incorporate phylogeny into a comparative investigation of the patterns of sexual dimorphism predicted by the hypothesis of male dwar¢sm via sex-linked di¡erential mortality during mate searching and note an absence of supporting evidence. There was no evidence of the predicted association between male and female size and sexual size dimorphism with life histories, exempli¢ed by variation in predatory strategies, in spiders.

show abstract

Przibram's Rule and male body‐size dimorphism in Zygoballus rufipes (Araneae: Salticidae)

Cited by 5 publications

References 27 publications

A test of Przibram's Rule

A test of Przibram's Rule

Sexual selection research on spiders: progress and biases

No association between sexual size dimorphism and life histories in spiders

Contact Info

Product

Resources

About