Where is the gonopodium located?
The intromittent organ found in poeciliid fish, called ‘gonopodium’ is sexually dimorphic and develops from the anal fin rays 3–5, the so-called 3–4–5 complex, during sexual maturation [4], [5].
What is the function of the gonopodium?
The gonopodium (modified anal fin of the male used to transfer sperm to the female) is the main character employed as a basis for the taxonomy and classification of the genus (Rosen and Bailey 1963).
What is a gonopodium in fish?
Definition of gonopodium : the anal fin of a male fish when modified to serve as a copulatory organ.
What is the male Intromittent organ?
An intromittent organ is a general term for an external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial species, as most non-mammalian aquatic species fertilize their eggs externally, although there are exceptions.
What is an Telopod?
telopod (noun; Greek telos, end; pous, foot): 1. (Arthropoda: Crustacea) Part of an appendage distal to the coxa. (Arthropoda: Diplopoda) In males, a modified leg, serving a copulatory function, on one of the posterior segments.
Which structures of crayfish are modified for reproduction into Claspers in males?
Male first thoracopod endites are modified into claspers to amplex the female prior to mating.
How do you pronounce Gonopodium?
noun, plural gon·o·po·di·a [gon-uh-poh-dee-uh]. Ichthyology.
What is gravid spot?
A gravid spot is a darkly colored spot on female livebearers, situated just behind the anal fin. It grows larger during pregnancy, getting larger the closer a fish is to giving birth.
How are Intromittent organs important for fertilization?
The basic function of an intromittent organ is deceptively simple: it places sperm into the female reproductive tract, thereby increasing a male’s probability of fertilizing ova.
What is the meaning of Intromittent?
[ ĭn′trə-mĭt′ənt ] adj. Conveying or sending into a body or cavity.
What is Genopods?
In crustaceans and millipedes, gonopods are modified walking or swimming legs. Gonopods may be highly decorated with elaborate structures which may play roles in sperm competition, and can be used to differentiate and identify closely related species.
How do millipedes reproduce?
Bristly millipede males must first spin a web on which they deposit their sperm. The female then approaches the web and puts the sperm into her own reproductive organs. Millipedes lay their eggs in the soil. Some species make individual cases for their eggs out of chewed-up leaves.
What is gonopodium in fish?
Definition of gonopodium. : the anal fin of a male fish when modified to serve as a copulatory organ.
What are gonopods in arthropods?
Gonopods are specialized appendages of various arthropods used in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ. In crustaceans and millipedes, gonopods are modified walking or swimming legs.
Where are gonopods found in millipedes?
In millipedes, gonopods consist of one or two pairs of often highly modified walking legs in mature males, and are primarily found in members of the subgroup Helminthomorpha—containing most orders and the vast majority of species—where they are located on the seventh body segment consisting of leg pairs 8 and/or 9.