(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 4


Fig. 4. Testis size of birds maintained on short days or transferred to 24 h light in Experiment 1. Bars indicate mean ± s.e.m. For P values, see text. Asterisks denote significant differences; NS, no significant difference. Sample sizes are red crossbill: 4, 4; pine siskin: 5, 5; Cassin's finch: 4, 4; gray-crowned rosy-finch: 3, 3.