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Fig. 1.-Study area on the Lostine River, Wallowa-Whitman National Forest, Oregon.
Fig. 2.-Daytime directional responses of tailed frogs in an aquatic test pen when celestial cues were visible (a, b, c, & d) and without celestial cues (e, f, & g). Frogs brought to the test arena in lightproof bags from a) east shore; b) west shore; c) north shore; d) south shore; e) tested under complete cloud cover; f) after sunset; g) before sunrise.
Fig. 3.-Directional responses of A. truei that were caged on an unfamiliar shore for 5 days. a) Terrestrial test; b) Aquatic test; c) Aquatic test of frogs removed from the cage and displaced in view of their surroundings.
Fig. 4.-Directional responses of A. truei in the terrestrial arena. a) Taken from a small pothole, displaced in a dry, clear plastic bag; b) Simultaneous test of frogs from two opposing shores. Aquatic tests of c) frogs moved 2.5 miles in darkness, then displaced in view of the surroundings in water; d) four groups of frogs displaced in a dry, clear plastic bag near the collection site; e) frogs floated downstream in a cage. |
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文章 : 英语