TEMPORAL LEKS AS A MATING SYSTEM IN A TEMPERATE ZONE DRAGONFLY (ODONATA-ANISOPTERA) .1. PLATHEMIS-LYDIA (DRURY)
TEMPORAL LEKS AS A MATING SYSTEM IN A TEMPERATE ZONE DRAGONFLY (ODONATA-ANISOPTERA) .1. PLATHEMIS-LYDIA (DRURY)
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DOI：
10.1163/156853974x00147
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发表时间：
1974-01-01
期刊：
影响因子：
1.3
通讯作者：
WOLF, LL
中科院分区：
文献类型：
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作者：
CAMPANELLA, PJ;WOLF, LL
材料与方法：白桦是一种异翅目白桦科，白桦亚科。该物种出现在整个加拿大南部和美国大部分地区的池塘栖息地，只在美国西南部干旱地区缺席（NEEDHAM & WESTFALL, 1955）。成虫体型中等（体长42-48毫米，后翅长30-35毫米），在颜色上表现出明显的两性二态性。雄性的前后翅膀中间有一条深棕色的带，成熟时腹部的背表面变成蓝白色。雌性在每只翅膀上有两条深棕色的带——一条在中间，另一条在尖端；腹部在成熟时不会变成蓝白色。雄性和雌性的腹节3至8两侧都有明显的斜黄色斑点。雅各布斯（JACOBS, 1955）描述了丽迪亚假单胞虫的生态学和行为的各个方面。1970年和1971年夏季，在位于纽约州锡拉丘兹西南17公里处的两个人工池塘进行了观测。池1是一个16至17岁，0.4公顷的椭圆形池塘（50米× 50米，周长350米）。池II位于池I西南600米处，是一个30至31年历史的0.2公顷椭圆形池塘（65米乘40米，周长140米）。这两个池塘都是永久性的，并在边缘周围漂浮或出现植被（灯芯草、莎草、香蒲和藻类）。在5个椭圆形区域（约6.5 × 8）上进行观察。om;6.5乘6。om;IO。5 . by i m；IO高7米；和8 × 6.5 m)在池塘I和两个椭圆形区域（16 × 6.5 m）。5 × 14米；19。5 × 5米)在池塘II上（图1）。因为速度快
MATERIALS AND METHODS Plathemis lydia is an Anisopteran odonate (family Libellulidae, sub-family Libellu-linae). The specie's occurs in pond habitats throughout southern Canada and most of the United States, being absent only from drier areas of the southwestern United States (NEEDHAM & WESTFALL, I955). Adults are medium size (length 42-48 mm, hind wing length 30-35 mm) and exhibit striking sexual dimorphism in coloration. The males have a single dark brown band across the middle of each fore and hind wing, and the dorsal surface of the abdomen becomes bluish white at maturity. Females have two dark brown bands across each wing-one band at the middle and one at the tip; the abdomen does not become bluish white at maturity. The sides of abdominal segments 3 through 8 bear conspicuous oblique yellow spots in both males and females. Various aspects of the ecology and behavior of P. lydia have been described by JACOBS (I955). Observations were carried out during the summers of 1970 and Ig17I at two manmade ponds located 17 km southwest of Syracuse, New York. Pond I is a I6 to I7-year old, 0.4 hectare oval-shaped pond (IIO m by 50 m, perimeter 350 m)'. Pond II, located 6oo m southwest of Pond I, is a 30 to 3r1-year old, 0.2 hectare oval-shaped pond (65 m by 40 m, perimeter 140 m). Both ponds are permanent and dontain floating or emergent vegetation (rushes, sedges, cattails, and algae) around the edges. Observations were made on five oval-shaped areas (approximately 6.5 by 8. om; 6.5 by 6. om; IO. 5 by Io m; IO by 7 m; and 8 by 6.5 m) on Pond I and on two ovalshaped areas (I6. 5 by 14 m; I9. 5 by 5 m) on Pond II (Fig. i). Because of the rapid