Field Observations of the Sheltering Behavior of the Solitarious Phase of the Desert Locust, Schistocerca gregaria, with Particular Reference to Antipredator Strategies

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト
46-04-08.pdf493.37 KB

Solitarious phase locusts are cryptic animals and usually seek shelter in plants. This trait was thought to be a specific antipredator strategy associated with the solitarious phase. However, information on preferences for particular shelter plants and sheltering behavior remains limited. In the present study, small-scale field observations were conducted to investigate the sheltering behavior of the solitarious phase of the desert locust, Schistocerca gregaria, in relation to plant species and size. A spiny plant, Fagonia arabica, and two spineless plants, Nucularia perrini and Stipagrostis plumosa, were identified at the survey site. Although the size of F. arabica did not differ significantly from that of the two other plant species, almost all the solitarious locusts used F. arabica for shelter. Locusts were found on a majority (78%) of the individual F. arabica examined, but the number of sheltering locusts varied. The F. arabica plants with locusts were significantly larger than those without. A positive correlation was found between the total number of sheltered locusts (nymphs and adults) per individual plant and the plant size (m3). The same tendency was observed for nymphs and adults alike. The local densities (no. of sheltered locusts / plant size (m3)) remained constant over a range of plant sizes. These results might indicate that solitarious locusts selected their shelter plant based on its species and size. Because F. arabica is a spiny plant, we concluded that solitarious locusts use not only visual but also physical defense mechanisms as antipredator strategies.

刊行年月日
作成者 OULD MAENO Koutaro PIOU Cyril OULD ELY Sidi OULD MOHAMED Sid′Ahmed EL HACEN JAAVAR Mohamed ABDALLAHI OULD BABAH Mohamed NAKAMURA Satoshi
著者キーワード

behavior

density-dependent phase polyphenism

morphology

公開者 Japan International Research Center for Agricultural Sciences
データ作成日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
46
4
開始ページ 339
終了ページ 345
DOI 10.6090/jarq.46.339
権利 Japan International Research Center for Agricultural Sciences
言語 eng