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First Report of Abnormal spermathecae in Phlebotomus （Larroussius） Iongicuspis Nitzulescu, 1930 （Diptera： Psychodidae）, in Tunisia

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Journal of Life Sciences 2015年第10期9卷 465-471页

作者： Jomaa Chemkhi Souheila Guerbouj Ikram Guizani Afif Ben Salah Laboratoire d'Epidemiologie Moleculaire et Pathologie Experimentale Appliquee aux Maladies infectieuses (LRl lIPT04) InstitutPasteur de Tunis Universite Tunis El Manar Tunisia Laboratoire d'Epidemiologie Medicale Institut Pasteur de Tunis Universite Tunis El Manar Tunisia

Phlebotomine sandflies （Diptera： Psychodidae） constitute a large group of flies, many of which have been described as vectors of leishmaniasis, a disease caused by Leishmania （Kinetoplastida： Trypanosomatidae） parasites. In Tunisia, a total of 17 species belonging to both genera Phlebotomus and Sergentomyia were described. In this work we report on an abnormality found in spermathecae of a female specimen ofPhlebotomus （Larroussius） longicuspis Nitzulescu, 1930. Sandflies were collected in SidiSaad locality, in the govemorate of Kairouan, central Tunisia, where zoonotic cutaneous leishmaniasis is endemic, during the June to November 2011 period, using CDC light traps. Males were washed and directly identified and females were dissected and morphologically identified using the head and the last two abdominal segments containing spermathecae and ducts. 162 flies were morphologically described. Among 33 females identified as Phlebotomus （Larroussius） longicuspis, one specimen was found abnormal and presented with three spermathecae. An additional spermathecae located in a short bifurcation on the upper extremity of one duct was found. This anomaly is for the first time described in Tunisia. Morphological abnormalities are important to report in order to avoid erroneous sandfly identification or description of new species.

关键词： Phlebotomine sand fly spermathecae anomaly.

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Female control of sperm ejection and retention in the cornsilk fly Euxesta eluta(Diptera:Ulididae)

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Insect Science 2023年第4期30卷 1183-1190页

作者： Solana Abraham Andrea Moyano Viviana Diaz MGabriela Murua Juan Rull Laboratorio de Investigaciones Ecoetologicas de Moscas de la Fruta y sus Enemigos Naturales(LIEMEN) PROIMI-BiotecnologiaCONICETTucumanArgentina Instituto de Tecnologia Agroindustrial del Noroeste Argentino(ITANOA) Estacion Experimental Agroindustrial Obispo Colombres(EEAOC)—CONICETTucumanArgentina

Promiscuous mating systems provide the opportunity for females to bias fertilization toward particular ***,distinguishing between male sperm com-petition and active female sperm choice is difficult for species with internal ***,species that store and use sperm of different males in different storing struc-tures and species where females are able to expel all or part of the ejaculates after cop-ulation may be able to bias *** report a series of experiments aimed at pro-viding evidence of female sperm choice in Euxesta eluta(Hendel),a species of ulidiid fly that expels and consumes ejaculates after *** found no evidence of greater reproductive success for females mated singly,multiply with the same male,or mated multiply with different *** *** possesses two spherical spermathecae and a bursa copulatrix for sperm storage,with a ventral *** was no significant difference in storing more sperm in spermathecae 24 h after copulation than immediately after *** mated with protein-fed males had greater reproductive success than similar females mated to protein-deprived ***-fed females prevented to consume the ejaculate,retained more sperm when mated to protein-fed males than when mated to protein-deprived *** results suggest that female *** can exert control of sperm retention of higher quality males through ejaculate ejection.

关键词： bursa copulatrix cornsilk fly cryptic female choice ejaculate consumption sperm choice spermathecae

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Quantitative impact of mating duration on reproduction and offspring sex ratio of Phytoseiulus persimilis(Acari: Phytoseiidae)

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Journal of Integrative Agriculture 2019年第4期18卷 884-892页

作者： Lü Jia-le ZHANG Bao-he JIANG Xiao-huan WANG En-dong XU Xue-nong Lab of Predatory Mites Institute of Plant Protection Chinese Academy of Agricultural Sciences

Phytoseiulus persimilis is an important biological control agent, commercially produced worldwide. To increase understandings of its reproduction, herein we provided quantitative descriptions of the inflation and deflation of its spermathecae as a function of time and copulation duration, and the quantitative impact of copulation termination on volume of spermatheca vesicle, fecundity, and offspring sex ratio. After mating started, at least one spermatheca started to inflate immediately, but no egg was produced until spermatheca volume reached 1 021 μm3. Beyond this size, cumulative fecundity was linearly correlated with vesicle volume. Producing one egg required 36 μm3 volume increase of the vesicle. Each spermatheca vesicle reached its peak size at the end of mating duration(ca. 2.38 h after mating started), and started to shrink immediately. In 24 h, ca. 71% individuals had one completely shriveled spermatheca, while in 72 h all individuals had at least one shriveled spermatheca. The estimated maximum cumulative fecundity per female after a single mating is(69.4±7.7) eggs. No significant impact of mating termination on offspring sex ratio was observed after mating duration reached 60 min, while higher proportion of male offspring was observed when mating duration is 15 or 30 min. This study is the first step to investigate possible male impact on offspring sex ratio in P. persimilis. Our results suggested the number of sperms received during mating be a restriction factor of P. persimilis offspring sex ratio regulation.

关键词： predatory mite pseudoarrhe no toky spermathecae fecun dity sex determi nation

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