Luitgards-Moura J F, Castellón Bermúdez E G, Rosa-Freitas M G
Núcleo Avançado de Vetores, Universidade de Roraima, Boa Vista, RR, Brasil.
Mem Inst Oswaldo Cruz. 2000 Mar-Apr;95(2):251-7. doi: 10.1590/s0074-02762000000200021.
A closed colony of Lutzomyia longipalpis was established with specimens collected in the Raposa - Serra do Sol indian reservoir, one of the main foci of visceral leishmaniasis in the State of Roraima, Brazil. Biological observations were made on four generations of a L. longipalpis colony with emphasis on productivity. Aspects studied were the number of laid and retained eggs, and the number of adults (male and female) per generation. During the four generations the percentage of engorged females that laid eggs varied from 64.2% (third generation-F3) to 90.3% (second generation-F2). The mean number of eggs laid per female varied from 23.6 (F3) to 39. 9 (first generation-F1). The maximum number of eggs laid per female varied from 84 (F3) to 124 (F1). The mean number of retained eggs per female was 12.7 (parental generation-P and F1) to 22.1 (F2). The number of females exceeded the number of males in all generations. However, significant difference for male/female ratio was found only for F3. Fecundity rates were between 42.1 (F3) and 58.3 (F2). From a total of 439 blood-fed females, 355 females laid 12,257 eggs that yield 5,354 adults (2,525 males and 2,829 females) in four generations. F2 presented maximum productivity and fecundity rates.
利用在巴西罗赖马州主要内脏利什曼病疫源地之一的拉波萨 - 塞尔拉杜索尔印第安水库采集的标本，建立了一个封闭的长须罗蛉种群。对长须罗蛉种群的四代进行了生物学观察，重点是生产力。研究的方面包括产卵数和留存卵数，以及每代成虫（雄性和雌性）的数量。在这四代中，产卵的饱血雌虫百分比从64.2%（第三代 - F3）到90.3%（第二代 - F2）不等。每只雌虫产卵的平均数从23.6（F3）到39.9（第一代 - F1）不等。每只雌虫产卵的最大数从84（F3）到124（F1）不等。每只雌虫留存卵的平均数为12.7（亲代 - P和F1）到22.1（F2）。在所有世代中，雌虫数量均超过雄虫数量。然而，仅在F3代发现雌雄比例存在显著差异。繁殖率在42.1（F3）和58.3（F2）之间。在四代中，从总共439只饱血雌虫中，有355只雌虫产下了12257枚卵，这些卵孵化出5354只成虫（2525只雄性和2829只雌性）。F2代呈现出最高的生产力和繁殖率。
