Animal Migration: Seasonal Reversals of Migrant Moths
نویسنده
چکیده
A recent study has found that, as migrating silver Y moths pass high overhead above central England in the spring, their headings were generally aimed towards north---a reversal of direction relative to that of autumn migrants. The silver Y must detect its direction of movement, likely by a magnetic sense which must reverse with the season.
منابع مشابه
Convergent patterns of long-distance nocturnal migration in noctuid moths and passerine birds.
Vast numbers of insects and passerines achieve long-distance migrations between summer and winter locations by undertaking high-altitude nocturnal flights. Insects such as noctuid moths fly relatively slowly in relation to the surrounding air, with airspeeds approximately one-third of that of passerines. Thus, it has been widely assumed that windborne insect migrants will have comparatively lit...
متن کاملA seasonal switch in compass orientation in a high-flying migrant moth
Most individual insect migrants have only a short time ‘window’ for migration (just a few nights) and comparatively slow airspeeds. Thus, to achieve long-range displacement into temporary breeding habitats, migrants must hitch a ride on fastmoving, high-altitude winds [1]. We recently demonstrated that the migratory noctuid moth Autographa gamma has evolved a compass mechanism which facilitates...
متن کاملInsect Migration: Do Migrant Moths Know Where They Are Heading?
Moth migration has been assumed to involve hitching a ride in favorable winds. A new study has shown that silver Y moths migrate only on nights when winds would displace them southward, implying that they detect their direction of movement while airborne, likely by a magnetic sense.
متن کاملEffect of temperature and photoperiod on juvenile hormone biosynthesis and sexual maturation in the cotton bollworm, Helicoverpa armigera: implications for life history traits.
The Israeli population of the cotton bollworm, Helicoverpa armigera (Hübner), undergoes a short-day, low-temperature pupal diapause and is also suspected of being a seasonal migrant in the eastern Mediterranean region. H. armigera were reared in the laboratory under several constant temperature and photoperiodic combinations which simulate average conditions encountered in the spring, summer, e...
متن کاملThe Life Story Experience of “Migrant Dentists” in Australia: Potential Implications for Health Workforce Governance and International Cooperation
Background The migration of dentists is a major policy challenge facing both developing and developed countries. Dentists from over 120 countries migrate to Australia, and a large proportion are from developing countries. The aim of the study was to assess the life story experience (LSE) of migrant dentists in Australia, in order to address key policy challenges facing dentist migration. Meth...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Current Biology
دوره 18 شماره
صفحات -
تاریخ انتشار 2008