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ARS Home » Southeast Area » Stoneville, Mississippi » Southern Insect Management Research » Research » Publications at this Location » Publication #384250

Research Project: Ecologically Sustainable Approaches to Insect Resistance Management in Bt Cotton

Location: Southern Insect Management Research

Title: Positional relationships among male reproductive organs in insects

item HIROYOSHI, SATOSHI - Tokyo University Of Agriculture & Technology
item Reddy, Gadi V.P.

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 6/9/2021
Publication Date: 7/4/2021
Citation: Hiroyoshi, S., Reddy, G.V. 2021. Positional relationships among male reproductive organs in insects. In: Wu, W., editor. Male reproductive organs in insects. London, United Kingdom: IntechOpen Limited. p. 77407.

Interpretive Summary: The morphology, structure and size of organs have some functional significance. Insects are the most abundant of all organisms in the species number, and therefore female and male reproductive organs are highly diverse in their structure. The position, as well as the morphology, structure and function of the male internal reproductive organs, is presumably determined for some important reasons, perhaps for successful reproduction. The complex fold of these organs, surrounding by the tracheae and fat bodies, suggests that they require large amount of oxygen and nutrients. However, until now, research on the arrangement structure of reproductive organs has not been emphasized. We hope that this chapter will serve as an opportunity and foundation for studying not only the morphology, structure and function of reproductive organs, but also their positional relationships in the future.

Technical Abstract: Location, morphology and function of male internal reproductive organs in insects have been extensively studied, but positional relationship among them is less understood. Position and morphology of the testis, vas deferens, seminal vesicle, accessory gland and ejaculatory duct determine the migration or ejaculation of sperm and other substances. In species that the testis is connected with the seminal vesicle directly or the seminal vesicle is lacking, males usually have complete sperm in the testis and thus can use them immediately for mating. On the other hand, the testis of lepidopteran insects is apart from the duplex (sperm storage organ) via the vas deferens, the sperm are not complete to mature and need morphological development in the vas deferens. We would like to discuss about the significance of positional relationship of male reproductive organs among their morphology and function including the sperm.