动物造模 z-bio 2021-09-28 424

　　A study published online on Wednesday in the British journal Nature Ecology and Evolution found that bird egg embryos can sense alarm calls from adults and transmit this information to their nest companions through vibration. Eggs of other birds. This information helps to adjust the developing embryo to better adapt to the external environment after hatching.

　　Many animal embryos can receive information from their parents through hormones and sound signals. This information helps to set the development of the embryo to better adapt to the postpartum environment. Taking the oviparous animal as an example, the eggs transmit the level of development through vibration, so that the brothers and sisters in the same nest can hatch at the same time. However, scientists do not know whether this kind of eggs can recognize external environmental information and convey this information in the nest.

　　This time, scientists Joseph Noquila and Alberto Valende of the University of Vigo in Spain divided the eggs of the Caspian gull into three littermates, and played warning recordings of adult predation to some littermates. Eggs from other nests in a soundproof environment. For the nest eggs that sounded the adult bird alarm, the researchers only had two eggs to see if the alarm bark affected embryonic development and whether this information could be passed on to the third egg. I let you hear the recording.

　　The research team found that compared with the soundproof control group, the frightened eggs vibrated more, made less noise, and hatched more slowly. After successful incubation, the chicks who hear the alarm in the egg have high levels of stress-related hormones, and will curl up shortly after hearing the predation alarm. The scientists also found that the third egg in the same nest as the bird's egg that heard the alarm had high levels of stress-related hormones after the chicks hatched, indicating the behavior of siblings in the same nest.