星豹蛛捕食速度的初步研究

Study on Speed of Predation of Pardosa astrigera L. Koch

研究了星豹蛛(Pardosa astrigera L.Koch)在不同条件下对有翅麦蚜的捕食速度。结果表明:星豹蛛的捕食速度与其体重、步足长度和身体长度无关,与性别和饥饿程度有显著关系。星豹蛛在饥饿4 d时捕食速度最快;雌蛛的捕食速度显著快于雄蛛。蜘蛛共存,如雄蛛-雄蛛、雄蛛-雌蛛、雌蛛-雌蛛,对捕食速度也有一定的影响。2只雄蛛共存时,各自的捕食速度显著减慢;2只雌蛛共存时,各自的捕食速度变化不大;一雌一雄共存时,雄蛛的捕食速度显著减慢,而雌蛛的捕食速度基本不变。

The speed of predation of Pardosa astrigera L.Koch on winged wheat aphid was studied.The results showed that the weight,pereiopodslength and body length had no influence on the speed of predation,while sex and starvation had remarkable influence on it.The speed of predation was the fastest 4 days after starvation,and the speed of female was significantly faster than that of male.Besides,the coexistence of spiders,for example male and male,male and female,and female and female,respectively also had some influence on the speed of predation.When two male spiders coexisted,they both slowed down the speed of predation.On the contrary,when two female spiders coexisted,there was not any obvious change on each one.When one male spider and one male spider coexisted,the speed of male decreased significantly,while that of female was not changed.