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Sperm storage and motility in the ovary of the marine sculpin Alcichthys alcicornis (Teleostei: Scorpaeniformes), with internal gametic association


, : Sperm storage and motility in the ovary of the marine sculpin Alcichthys alcicornis (Teleostei: Scorpaeniformes), with internal gametic association. Journal of Experimental Zoology 292(2): 145-155

Elkhorn sculpin, Alcichthys alcicornis, is a marine teleost with a unique reproductive mode called "internal gametic association," in which sperm introduced into the ovary by copulation enter the micropylar canal of ovulated eggs in the ovarian cavity, but actual sperm-egg fusion does not occur until the eggs have been released into sea water. It is also known that this fish is a multiple spawner, which spawns at intervals of a few days for one month, and the sperm introduced into the ovary at the beginning of the spawning season retain their fertilizability for the entire period. To clarify how the fertilizability of sperm is maintained internally, the ultrastructure of sperm, the morphological characteristics related to sperm storage in the ovary, and the characteristics of sperm motility were investigated. Mature sperm generally have the normal form of teleost sperm, devoid of acrosomal structures. However, it was found that the midpiece is comparatively elongated and has a compact aggregation of many small-size mitochondria. The intraovarian sperm remained floating in the ovarian fluid throughout the spawning season. The sperm showed high motility in isotonic and weak alkaline solution, containing sodium ions, which was similar to the ovarian fluid of this fish. Sperm continued to move in artificial ovarian fluid for 7-14 days. Considering these results together, it is thought that the intraovarian sperm move throughout the spawning season due to the plentiful energy generated by the many mitochondria.

US$29.90

PMID: 11754030


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Zampieri, T.T.; Pedroso, Jão.A.B.; Furigo, I.C.; Tirapegui, J.; Donato, J., 2014: Oral leucine supplementation is sensed by the brain but neither reduces food intake nor induces an anorectic pattern of gene expression in the hypothalamus. Leucine activates the intracellular mammalian target of the rapamycin (mTOR) pathway, and hypothalamic mTOR signaling regulates food intake. Although central infusion of leucine reduces food intake, it is still uncertain whether oral leucine suppl...

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Chen C.S., 1989: Water activity concentration models for solutions of sugars salts and acids. A semi-empirical model of water activity changes due to solute concentrations increase in solutions of electrolytes and nonelectrolytes was developed based on an extension of Raoult's law. Comparisons between predicted and observed aw data fo...

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Medarde, M.; Pelaez-Lamamie-De-Clairac, R.; Ramos, A., C.; Caballero, E.; Lopez, J.-Luis; Gravalos, D., G.; San-Feliciano, A., 1995: Synthesis and pharmacological activity of combretastatin analogues: Naphthylcombretastatins and related compounds. Through a versatile synthesis of combretastatins we have prepared and assayed for activity some new compounds of this kind of antitumoral agents. Ketoderivatives (combretastatones) and other diphenylethane derivatives display low activity, but nap...

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Soprana, C., 1963: On The Technical, Administrative, General Medicolegal And Medical-Insurance Aspects Of The Clinical Record. L' Arcispedale S. Anna di Ferrara 16: 505-524

Kletzmayr, J.; Uffmann, M.; Schmaldienst, S., 2003: Severe but reversible hypertensive encephalopathy. Wiener Klinische Wochenschrift 115(12): 416-416

Singh, D.; Pillai, M.K.; Borkovec, A.B.; Terry, P.H., 1978: Chemo sterilization of earias fabia. Males of E. fabia (Cramer) [a pest of cotton and okra in India] became sterile when their pupae were dipped for 30-60 min in 0.5-0.75% aqueous solutions of thiotepa or when adults were treated topically with 12.5 .mu.g/male of the same compound. D...