Results indicate that residents were initially motivated by the incentives (e.g. points exchanged for eggs) and social influences, but habit was the key factor for maintaining their behaviour, and cited as the main reason they would continue if the incentives stopped.
In 2006, we exchanged all eggs in the second day of incubation between matched pairs of nests of the same (±1 d) breeding date and clutch size.
Similarly, you could exchange the eggs for fake flowers in pastel colors to make a spring wreath.
In all egg experiments, one host egg was exchanged with one experimental egg.
In particular, earthworms are hermaphroditic (i.e., each individual possesses both male and female organs), and their reproductive activities are complex and involve sequentially mating, sperm exchange, egg fertilization and cocoon deposition.
We reduced the energetic demands of incubation by exchanging 1 egg for an artificial heat-producing egg (29.4×21.0mm; Jan Petrů, http://www.forestspy.com).com
In 17 of the 27 trials visited by a honeyguide, a control egg (a little bee-eater egg from another nest) was exchanged for a host egg, in case hosts use some other cue to detect foreign eggs.
Scores of problems have been claimed: intentionally scribbled-on petitions, physical altercations about petitions, fake names on petitions, and a slew of screamed bad words (not to mention at least one egg) exchanged over petitions.
I said, "Chapatis and eggs?" Saroj exchanged a volley of Nepalese with the waiter and then announced, "We will eat noodles".
On the last leg of Hervé's journey, he is led blindfolded from Yamagata harbor to a village in the Japanese interior where he meets with Hara Jubei Koji Yakushoo), a local warlord, to exchange gold for eggs.
