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首页> 外文期刊>Bulletin de la Societe Zoologique de France >CYCLE DE VIE D'EOPERLA OCHRACEA KOLBE, 1888 (PLECOPTERA, PERLIDAE) EN TUNISIE
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CYCLE DE VIE D'EOPERLA OCHRACEA KOLBE, 1888 (PLECOPTERA, PERLIDAE) EN TUNISIE

机译：突尼斯的小叶栎（EOPERLA OCHRACEA KOLBE）生命周期，1888年

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摘要

The larval development of Eoperla ochracea Kolbe, 1888, has been studied at the single locality where it has been captured: the stream Ellil at 235m above sea level. This species shows a univoltine cycle including five larval stages (established from measurements of the cephalic capsule width), egg and adult stages. The larval development requires more than 10 months. These stages show temporal overlaps due to the thermal regime of the stream. The cold wintry weather inhibits larval growth whereas increased temperature during the fall and the spring contributes to an acceleration of the larval development. The species is considered as belated vernal and its period of flight extends from mid-April to the end of May. The embryonic and nymphal diapause is excluded by reason of the permanent regime of the Ellil stream, the low altitude of the locality and the relatively elevated temperature in relation to the those recorded in Maghreb and European watersheds. The relationship between variation of monthly water temperature and nymphal body length suggests a synchronizing effect of temperature on the emergence of adults and the onset of sexual dimorphism during the last two nymphal stages. Adults differ in terms of size and weight, with females being longer and heavier than males.
机译：1888年，oper蛇oper的幼虫发育已在被捕获的单一地点进行了研究：溪流“ Ellil”在海拔235m处。该物种显示出一个单伏周期，包括五个幼体阶段（根据对头capsule宽度的测量确定），卵和成年阶段。幼虫的发育需要超过10个月的时间。这些阶段显示了由于流的热状态而造成的时间重叠。寒冷的寒冷天气会抑制幼虫的生长，而秋季和春季温度的升高会促进幼虫的生长。该物种被认为是迟来的春季，其飞行时间从四月中旬到五月底。胚胎和若虫滞育被排除在外，是由于《埃利尔》溪流的永久性，与马格里布和欧洲流域所记录的相比，当地海拔低，温度相对升高。月水温变化与若虫体长之间的关系表明，温度在最后两个若虫阶段对成年的出现和性二态性的发作具有同步作用。成年人的大小和体重有所不同，雌性比雄性更长，更重。

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