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Annual Migration of Agrotis segetum (Lepidoptera: Noctuidae): Observed on a Small Isolated Island in Northern China.

Guo J, Fu X, Wu X, Zhao X, Wu K - PLoS ONE (2015)

Bottom Line: The early summer populations migrate in a south-north direction, which might undertake a long-distance flight on several successive nights.The autumn populations migrate in a north-south direction, which might originate not far from the trapping site.Based on these findings, the migratory physiology of A. segetum was discussed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China; Department of Entomology, College of Plant Protection, Henan Agricultural University, Zhengzhou, China.

ABSTRACT
Migration behavior of the turnip moth, Agrotis segetum (Lepidoptera: Noctuidae), is not well known by far. Here, we present the data from an 11-year study on A. segetum by means of searchlight trapping and ovarian dissection on Beihuang (BH) Island, which located in the center of the Bohai Strait in northern China. The data showed a large number of A. segetum flight across the strait each year, which provides direct evidence that A. segetum is a long-distance migrant, migrating at least 40-60 km to reach the trapping site. The migration period during 2003-2013 ranged from 115 to 172 d. Among the catches, the proportion of females was significantly higher than that of males in each month from May to September. Ovarian dissection showed that the proportion of mated females and the proportion of sexually mature females was significantly higher than that of unmated females and sexually immature females in early summer, respectively, but conversely in autumn. The early summer populations migrate in a south-north direction, which might undertake a long-distance flight on several successive nights. The autumn populations migrate in a north-south direction, which might originate not far from the trapping site. Based on these findings, the migratory physiology of A. segetum was discussed.

No MeSH data available.


Related in: MedlinePlus

Maps showing the zone of East Asia and the position of Beihuang (BH) Island, the searchlight trapping site (right-hand map), relative to the Bohai Sea and Yellow Sea.
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pone.0131639.g001: Maps showing the zone of East Asia and the position of Beihuang (BH) Island, the searchlight trapping site (right-hand map), relative to the Bohai Sea and Yellow Sea.

Mentions: Searchlight trapping was carried out from April to October during 2003–2013 on BH (38°24´N; 120°55´E). BH is a small island with ~ 2.5 km2 area, located in the center of the Bohai Strait, at a distance of ~ 60 km from the mainland to the south and ~ 40 km to the north (~ 2.5 km from the neighbor Nanhuang Island) (Fig 1). As the Chinese Academy of Agricultural Sciences is an affiliated part of the Ministry of Agriculture of the People’s Republic of China, no specific permits were required for this study. No endangered or protected species were involved in this study. A vertical-pointing searchlight trap positioned on a platform ~8 m above sea level (asl), was used to attract and capture high-altitude migrants (up to ~500 m asl) [25]. The trap was equipped with a 1,000 W metal halide lamp (model JLZ1000BT; Shanghai Yaming Lighting Co. Ltd., Shanghai, China), that produces a vertical beam of light with a luminous flux of 105,000 lm, a color temperature of 4,000 K, and a color rendering index of 65 [26].


Annual Migration of Agrotis segetum (Lepidoptera: Noctuidae): Observed on a Small Isolated Island in Northern China.

Guo J, Fu X, Wu X, Zhao X, Wu K - PLoS ONE (2015)

Maps showing the zone of East Asia and the position of Beihuang (BH) Island, the searchlight trapping site (right-hand map), relative to the Bohai Sea and Yellow Sea.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482664&req=5

pone.0131639.g001: Maps showing the zone of East Asia and the position of Beihuang (BH) Island, the searchlight trapping site (right-hand map), relative to the Bohai Sea and Yellow Sea.
Mentions: Searchlight trapping was carried out from April to October during 2003–2013 on BH (38°24´N; 120°55´E). BH is a small island with ~ 2.5 km2 area, located in the center of the Bohai Strait, at a distance of ~ 60 km from the mainland to the south and ~ 40 km to the north (~ 2.5 km from the neighbor Nanhuang Island) (Fig 1). As the Chinese Academy of Agricultural Sciences is an affiliated part of the Ministry of Agriculture of the People’s Republic of China, no specific permits were required for this study. No endangered or protected species were involved in this study. A vertical-pointing searchlight trap positioned on a platform ~8 m above sea level (asl), was used to attract and capture high-altitude migrants (up to ~500 m asl) [25]. The trap was equipped with a 1,000 W metal halide lamp (model JLZ1000BT; Shanghai Yaming Lighting Co. Ltd., Shanghai, China), that produces a vertical beam of light with a luminous flux of 105,000 lm, a color temperature of 4,000 K, and a color rendering index of 65 [26].

Bottom Line: The early summer populations migrate in a south-north direction, which might undertake a long-distance flight on several successive nights.The autumn populations migrate in a north-south direction, which might originate not far from the trapping site.Based on these findings, the migratory physiology of A. segetum was discussed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China; Department of Entomology, College of Plant Protection, Henan Agricultural University, Zhengzhou, China.

ABSTRACT
Migration behavior of the turnip moth, Agrotis segetum (Lepidoptera: Noctuidae), is not well known by far. Here, we present the data from an 11-year study on A. segetum by means of searchlight trapping and ovarian dissection on Beihuang (BH) Island, which located in the center of the Bohai Strait in northern China. The data showed a large number of A. segetum flight across the strait each year, which provides direct evidence that A. segetum is a long-distance migrant, migrating at least 40-60 km to reach the trapping site. The migration period during 2003-2013 ranged from 115 to 172 d. Among the catches, the proportion of females was significantly higher than that of males in each month from May to September. Ovarian dissection showed that the proportion of mated females and the proportion of sexually mature females was significantly higher than that of unmated females and sexually immature females in early summer, respectively, but conversely in autumn. The early summer populations migrate in a south-north direction, which might undertake a long-distance flight on several successive nights. The autumn populations migrate in a north-south direction, which might originate not far from the trapping site. Based on these findings, the migratory physiology of A. segetum was discussed.

No MeSH data available.


Related in: MedlinePlus