House finch

The range expansion of the House Finch (Carpodacus mexicams) in Northern America has been taking place since 1940. From the observed population size. Fig. 7.13 inset, we can estimate r by fitting a straight line to the logarithms of the observed data for the total population vs time. The slope of the fitted line yields r = 0.020 0.003 yr  

To calculate T, note that when the adult age is reached, individuals leave the paternal territory and fly to new places. The value of this time has been estimated from observations to fall between 1.5 and 2 years [196] we choose 1.75 yr as a typical value. In fact, values of T between 1.5 and 2 yr do not change the results we derive below. From Fig. 7.13 (main figure) and (7.44) we obtain D = (10.1 2.4) x 10 km /yr. From (7.43) one finds that both RD and RT models yield an invasion velocity of 28 4 km/yr with a relative difference (urd — Urt) /wrt of 1.8 0.4. The observed velocity is 28 1 km/yr and can be estimated from experimental 

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YOU ARE WHAT YOU EAT" DIETARY CONTROL OF CAROTENOID COLORATION IN THE HOUSE FINCH... 

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Hill, G. E. 1990. Female house finches prefer colorful males Sexual selection for a condition-dependent trait. Anim. Behav. 40 563-572. 

Hill, G. E. 1992. The proximate basis of variation in carotenoid pigmentation in male house finches. Auk 109 1-12. 

Hill, G. E. 1993. Geographic variation in the carotenoid plumage pigmentation of male house finches (Carpodacus mexicanus). Biol. J. Linn. Soc. 49 63-86. 

Hill, G. E. 1994. Geographic variation in male ornamentation and female mate preference in the house finch A comparative test of models of sexual selection. Behav. Ecol. 5 64-73. 

Hill, G. E. 2002. A Red Bird in a Brown Bag The Function and Evolution of Colotful Plumage in the House Finch. Oxford University Press, New York. 

Hill, G. E., Inouye, C. Y., and Montgomerie, R. 2002. Dietary carotenoids predict plumage coloration in wild house finches. Proc. R. Soc. Lond. B 269 1119-1124. 

McGraw, K. J., Nolan, P. M., and Crino, O. L. 2006b. Carotenoid accumulation strategies for becoming a colorful house finch Analyses of plasma and liver pigments in wild molting birds. Fund. Ecol. 20 678-688. 

Zahn, S. N., and Rothstein, S. I. 1999. Recent increase in male house finch plumage variation and its possible relationship to avian pox disease. Auk 116 35 14. 

Black vulture Coragyps atratus House finch Carpodacus mexicanus... 

Carey, C., Marsh, R.L., Bekoff, A., Johnstoa R.M. Olin, A.M. (1988). Enzyme activities in muscles of seasonally acclimatized house finches. In Physiology of Cold Adaptation in Birds, ed. C. Bech R.E. Reinertsen, pp. 95-103. New York Plenum. 

We consider two avian range expansions. Collared Dove and House Finch, and compare their observed range expansion rates with the predictions of RD and RT models... 

Fig. 7.13 Inset-. House Finch survey-wide population size (P, measured in counts per party hour) vs time (The North American Breeding Bird Survey. Graph of survey-wide yearly indices from CBC. USGS Patuxent Wildhfe Research Center, Laurel, Maryland, USA). In order to estimate r we used a logarithmic plot and removed points far away from the exponential phase (large times), which implied a decrease in the regression coefficient of the linear fits. Main figure House Finch annual dispersal histogram (from [457]). Note that a time interval of 1 yr, which is the value for the data shown, corresponds roughly to the time required by a newborn individual to turn into an adult, i.e., roughly to T in the RT model. Reprinted from [329]...

Fig. 7.14 Linear fit of experimental data to estimate the velocity of the range expansion of the House Finch. The two first data points were removed because they correspond to early times, when the population invasions had not yet reached the saturation (consttmt) velocity. Reprinted from [329]...

Norman, D.M., J.R. Mason L. Clark. 1992. Capsaicin effects on consumption of feed by cedar waxwings, and house finches. Wilson Bull. 104 549-551. 

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