Spermatophore

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spermatophore

[spər′mad·ə‚fȯr]
(zoology)
A bundle or packet of sperm produced by certain animals, such as annelids, arthropods, and some vertebrates.

Spermatophore

 

in some animals, a capsule containing male sexual cells, or spermatozoa. Spermatophores serve to transport spermatozoa. They are characteristic of leeches, Pogo-nofora, cephalopods, some gastropods and amphibians, and many crustaceans, arachnids, myriopods, and insects.

A spermatophore’s structure and the way the spermatophore enters a female’s genital system vary. For example, in crustaceans, arachnids, and insects different extremities participate in the transport of spermatophores. In cephalopods the hectocoty-lus, one of the arms, usually transports spermatophores. The male grasps spermatophores with the hectocotylus and transfers them into the female’s mantle cavity. In some Octopoda a hectocotylus filled with spermatophores breaks away from the body of the male and floats to the female, inserting itself into the mantle cavity. Male tritons and salamanders attach spermatophores to objects; the spermatophores are then drawn in by the female’s cloaca.

References in periodicals archive ?
Other features that imply mating success are the presence of sperm plugs in the female's oviduct or spermatophores in its spermatheca/seminal receptacle (Ungfors 2007, Fazhan et al.
Preston-Mafham 2000): when the first spermatophore is ready to transfer, the male turns his back while raising his forewings perpendicularly to the body, which exposes the glandular structures located on the metanotum below the base of the forewings.
Comparative morphology, variability, and systematic applications of cephalopod spermatophores (Teuthoidea and Vampyromorpha).
Spermatophores are adhesive in some species of squid, which allows them to easily glue onto the surface of the female's skin.
Females of Cnephasia jactatana Walker, 1863 (Tortricidae), which copulated with nonvirgin males, received spermatophores that were 45% smaller than the ones transferred in the first copulation.
Fertilization is internal and the transfer of sperm may occur indirectly through spermatophores in representatives of the suborder Cyphophthalmi, or directly by means of a long and fully intromittent male genitalia in the suborders Eupnoi, Dyspnoi, and Laniatores (Machado & Macias-Ordonez 2007).
Their topics include methods for sperm collection, determining egg quality in teleost fish, the cryo-preservation of fish oocytes, semen cryo-preservation of the endangered Brazilian species piracanjuba, and techniques for the cryo-preservation of spermatophores of the giant freshwater prawn.
Ejection of spermatophores during or after copulation has been observed in some species of Pseudoxycheila (Rodriguez 1998), and this could reflect cryptic mate choice by females.
Then, "she walks away from this aggregate of males who are going crazy putting down their spermatophores.
The gland present in other fissurelids seems to be related with the pattern of development of the species; adding extra material to the gametes for clustering the oocytes during spawning in females (Boutan), or packaging the sperms in spermatophores in males (Medem, 1945).
It is hoped that these spermatophores could be stored and used to artificially inseminate females in a selection program.