Arid
DOI10.1007/s10530-009-9644-8
Alfalfa fields promote high reproductive rate of an invasive predatory lady beetle
Kajita, Yukie1,2; Evans, Edward W.2
通讯作者Kajita, Yukie
来源期刊BIOLOGICAL INVASIONS
ISSN1387-3547
出版年2010
卷号12期号:7页码:2293-2302
英文摘要

Invasive insect species often may attain high fecundity in agricultural habitats, thereby contributing to their establishment in new geographic regions and their displacement of similar native species. Such may be true for predatory lady beetles (Coleoptera: Coccinellidae) that have been introduced to North America in recent decades, raising concerns of adverse impact on native lady beetles. In northern Utah, Coccinella septempunctata L. first appeared in 1991, and is now predominant among lady beetles especially in alfalfa fields. We assessed the suitability of alfalfa fields as breeding habitat for females of C. septempunctata and the native, similarly sized Coccinella transversoguttata richardsoni Brown. The timing and amount of egg production differed significantly between C. septempunctata and C. transversoguttata as populations of aphids increased through spring and early summer. Reproduction by both species conformed to the egg window hypothesis, with populations of the predators producing most eggs before aphid numbers peaked. But consistently among fields and years, females of C. septempunctata produced more eggs, and did so earlier in the spring, than C. transversoguttata females even at low prey density. Furthermore, C. septempunctata females were more successful than females of C. transversoguttata in approaching their maximum body weights and reproductive output as measured in the laboratory under ideal conditions. The strong reproductive success of C. septempunctata may contribute to its displacement of C. transversoguttata in irrigated alfalfa in the generally arid Intermountain West of North America and to its establishment as an abundant species in this region of North America.


英文关键词Invasive species Reproduction Native species Predatory lady beetles Coccinella septempunctata
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000278897800033
WOS关键词COCCINELLA-SEPTEMPUNCTATA COLEOPTERA ; BIOLOGICAL-CONTROL ; HARMONIA-AXYRIDIS ; NATURAL ENEMIES ; LADYBIRDS COLEOPTERA ; NATIVE COCCINELLIDS ; SPECIES COLEOPTERA ; PREY ABUNDANCE ; NORTH-AMERICA ; BODY-SIZE
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163470
作者单位1.Univ Kentucky, Dept Entomol, Lexington, KY 40546 USA;
2.Utah State Univ, Dept Biol, Logan, UT 84322 USA
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GB/T 7714
Kajita, Yukie,Evans, Edward W.. Alfalfa fields promote high reproductive rate of an invasive predatory lady beetle[J],2010,12(7):2293-2302.
APA Kajita, Yukie,&Evans, Edward W..(2010).Alfalfa fields promote high reproductive rate of an invasive predatory lady beetle.BIOLOGICAL INVASIONS,12(7),2293-2302.
MLA Kajita, Yukie,et al."Alfalfa fields promote high reproductive rate of an invasive predatory lady beetle".BIOLOGICAL INVASIONS 12.7(2010):2293-2302.
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