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Minggu, 05 Agustus 2012

Link Warna Kupu-Kupu Raja Danaus plexippus

Jurnal KeSimpulan.com - Kupu-kupu Raja (Danaus plexippus) dengan sayap merah terbang lebih lanjut. Kupu-kupu Monarch dengan sayap oranye gelap terbang lebih jauh.

Para raja Danaus plexippus di Amerika Utara berkembang biak di musim panas kemudian bermigrasi ribuan kilometer ke selatan Meksiko sebelum dihukum musim dingin. Fitur sayap sepintas sama. Tetapi semua raja memiliki ketajaman yang berbeda.

Meskipun dibangkitkan pada jenis tanaman inang yang sama, ada perbedaan halus di antara para raja. Oranye terang dan orange gelap.

Apa arti biologis dari semua ini dengan warna yang berbeda? Apakah warna sayap terkait dengan migrasi?

"Sampai sekarang sudah banyak pembandingan kupu-kupu dalam hal warna sayap. Tetapi sangat sedikit orang yang benar-benar melihat individu dalam spesies," kata Andrew Davis, ekolog University of Georgia.

Davis dan rekan secara sistematis membandingkan warna sayap kupu-kupu yang ditangkap selama musim kawin di musim panas dengan kupu-kupu yang ditangkap selama migrasi di musim gugur.

"Para raja yang ditangkap pada musim gugur secara statistik lebih gelap dari mereka yang ditangkap pada musim panas. Mungkin sayap gelap berarti kinerja penerbangan lebih baik."

Kupu-kupu terbang berputar-putar dalam "flight mill" sementara durasi penerbangan diukur selama 2 jam. Di ujung lain sebuah 'photo' memungkinkan setiap putaran terpantau komputer. Waktu rata-rata penerbangan sekitar 1 jam, tetapi mereka dengan sayap gelap terbang lagi melebihi 1 jam.

"Kami masih belum tahu mengapa ada link antara warna dan kinerja penerbangan. Bagi kita, ini menjadi wilayah baru."
The Redder the Better: Wing Color Predicts Flight Performance in Monarch Butterflies

Andrew K. Davis1, Jean Chi1, Catherine Bradley1, Sonia Altizer1
  1. Odum School of Ecology, The University of Georgia, Athens, Georgia, United States of America
PLoS ONE 7(7): e41323, July 25, 2012

Akses : DOI:10.1371/journal.pone.0041323
Video dan Gambar :
Andrew K. Davis et.al., PLoS ONE, DOI:10.1371/journal.pone.0041323
YouTube : KeSimpulan.com http://www.youtube.com/user/KeSimpulanTube


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