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L'emmagatzematge intraovàric d'esperma en Helicolenus dactylopterus (Pisces: Scorpaeniformes)

Authors: Vila Espuña, Sílvia;

L'emmagatzematge intraovàric d'esperma en Helicolenus dactylopterus (Pisces: Scorpaeniformes)

Abstract

El penegal, Helicolenus dactylopterus dactylopterus (Pisces: Scorpaeniformes), és una espècie que habita profunditats d'entre els 200 i 1000 m i presenta una clara distribució batimètrica en funció de la seva talla. Presenta fecundació interna i a l'interior de l'ovari conté estructures d'emmagatzematge que permeten emmagatzemar l'esperma durant períodes de temps considerablement llargs. Les cèl·lules sexuals masculines es mantenen viables gràcies a diverses substàncies nutritives que obtenen de la bossa citoplasmàtica i de l'epiteli criptal que delimita les estructures d'emmagatzematge. Aquest epiteli és també responsable de la seva protecció. Un cop els ous han assolit la maduresa, els espermatozoides són alliberats al lumen ovàric i es dóna la fertilització. És una espècie zigòpara: allibera òvuls fecundats que han estat retinguts al tracte reproductiu femení durant un curt període de temps i, per tant, els embrions són alliberats en estadis molt primerencs de desenvolupament. Així, el penegal presenta una estratègia reproductiva evidentment eficaç.

The bluemouth, Helicolenus dactylopterus dactylopterus (Pisces: Scorpaeniformes), is a species that inhabits the seabed at depths between 200 and 1000 m and shows a clear size-dependent bathymetric distribution. It has internal fertilization and, inside the ovary, there are storage structures that allow it to store sperm for considerably long periods of time. These male sexual cells remain viable thanks to several nutritious substances they obtain from the cytoplasmic bag and from the cryptal epithelium that delimits the storage structures. This epithelium is also responsible for their protection. Once the eggs have reached maturity, the spermatozoa are freed in the ovarian lumen and fertilization occurs. This species is zygoparous: liberation of fertilized ova, which have been retained in the female reproductive tract during a short period of time and, therefore, the embryos are freed in very early stages of development. Thus, the bluemouth exhibits an obviously effective reproductive strategy.

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Spain
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Keywords

Tesis i dissertacions acadèmiques, Emmagatzematge intraovàric, Intraovaric sperm, Helicolenus dactylopterus, Penegal, Ovarios, 575 - Genètica general. Citogenètica general. Immunogenètica. Evolució. Filogènia, Esperma, 575, Sperm, Ovaries, Scorpaenidae, 504, 504 - Ciències del medi ambient, Bluemouth, Ovaris

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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