Induced spermiation in 3-year-old sterlet, Acipenser ruthenus L.

Rzemieniecki, A.; Domagałła, J; Ciereszko, Andrzej; Trzebiatowski, R.; Kouřil, J.; Hamáčková, J.; Babiak, Igor

doi:10.1111/j.1365-2109.2004.00995.x

Cited by 9 publications

(8 citation statements)

References 26 publications

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“…In the present study, fresh sperm characteristics of Russian sturgeon, A. gueldenstaedtii, such as motility, duration of motility, sperm volume and concentration showed similar results to previous studies from either the same species or from other sturgeon species (Ginzburg, ; Dettlaff et al., ; Brown and Mims, ; Cosson et al., ; Linhart et al., ; Rzemieniecki et al., ; Horváth et al., ; Mirzoyan et al., ).…”

Section: Discussionsupporting

confidence: 90%

Sperm quality and effects of different cryomedia on spermatozoa motility in first-time spawning of cultured Russian sturgeon (Acipenser gueldenstaedtiiBrandt & Ratzeburg, 1833)

2015

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Section: Discussionsupporting

confidence: 90%

Sperm quality and effects of different cryomedia on spermatozoa motility in first-time spawning of cultured Russian sturgeon (Acipenser gueldenstaedtiiBrandt & Ratzeburg, 1833)

2015

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“…Abramis brama common bream hCG - (Kucharczyk et al, 1997) Acipenser ruthenus sterlet hCG 1 (Rzemieniecki et al, 2004) 2374…”

Section: Speciesunclassified

Hormonal manipulations for the enhancement of sperm production in cultured fish and evaluation of sperm quality

2017

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This article reviews the use of hormonal treatments to enhance sperm production in aquaculture fish and the methods available for evaluating sperm quality. The different types of testis development are examined and a brief review is presented of the endocrine regulation of spermatogenesis in fishes, including the increasing evidence of the existence of spermatozoa subpopulations. Hormonal manipulations are employed to induce spermatogenesis in species such as the freshwater eels, to synchronize maximal sperm volume to ovulation for in vitro fertilization and to enhance sperm production in species with poor spermiation. The hormones that are employed include gonadotropins (GtH) of piscine or mammalian origin, and gonadotropin-releasing hormone agonists (GnRHa) administered by injections or controlled-release delivery systems, with or without dopaminergic inhibitors. Pheromones in the culture water and hormones added to the sperm in vitro have also been employed to enhance spermiation and sperm quality, respectively, in some fishes. Hormonal therapies usually do not affect sperm quality parameters, except in cases where fish fail to spermiate naturally or produce very small volumes of high-density sperm. Different parameters have been used to evaluate fish sperm quality, including sperm volume and density, spermatozoa motility and morphometry, and seminal plasma composition. The development of Computer-Assisted Sperm Analysis (CASA) systems made possible the estimation of a higher number of sperm motion parameters using an objective, sensitive and accurate technique. The development of Assisted Sperm Morphology Analysis (ASMA) software has introduced a new approach for sperm evaluation studies, demonstrating changes in the spermatozoa related to reproductive season, hormonal treatments or the cryopreservation processes, and how these may be related to changes in sperm motility and fertilization capacity. The article concludes with a few practical protocols for the enhancement of sperm production in aquaculture species.

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“…GnRHa implants have also been used in Atlantic halibut to enhance the quality of the sperm, which is extremely viscous and exhibits very little spermatozoa motility towards the end of the spawning season (Vermeirssen et al, 2003), in starry flounder (Platichthys stellatus) to increase milt volume and sperm density (Moon et al, 2003) and in greenback flounder (Rhombosolea tapirina) to increase sperm volume (Lim et al, 2004). Still, in some species simple injections of GnRHa of LH preparations have been employed for the successful enhancement of spermiation, including the Siberian sturgeon (A. baerii) (Williot et al, 2002), the sterlet (Acipenser ruthenus) (Rzemieniecki et al, 2004), the precocious European sea bass (Schiavone et al, 2006) and the minnow (Rhynchocypris oxycephalus) (Park et al, 2002).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Broodstock management and hormonal manipulations of fish reproduction

Mylonas

Fostier²,

Zanuy

2010

General and Comparative Endocrinology

509

329

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Control of reproductive function in captivity is essential for the sustainability of commercial aquaculture production, and in many fishes it can be achieved by manipulating photoperiod, water temperature or spawning substrate. The fish reproductive cycle is separated in the growth (gametogenesis) and maturation phase (oocyte maturation and spermiation), both controlled by the reproductive hormones of the brain, pituitary and gonad. Although the growth phase of reproductive development is concluded in captivity in most fishes-the major exemption being the freshwater eel (Anguilla spp.), oocyte maturation (OM) and ovulation in females, and spermiation in males may require exogenous hormonal therapies. In some fishes, these hormonal manipulations are used only as a management tool to enhance the efficiency of egg production and facilitate hatchery operations, but in others exogenous hormones are the only way to produce fertilized eggs reliably. Hormonal manipulations of reproductive function in cultured fishes have focused on the use of either exogenous luteinizing hormone (LH) preparations that act directly at the level of the gonad, or synthetic agonists of gonadotropin-releasing hormone (GnRHa) that act at the level of the pituitary to induce release of the endogenous LH stores, which, in turn act at the level of the gonad to induce steroidogenesis and the process of OM and spermiation. After hormonal induction of maturation, broodstock should spawn spontaneously in their rearing enclosures, however, the natural breeding behavior followed by spontaneous spawning may be lost in aquaculture conditions. Therefore, for many species it is also necessary to employ artificial gamete collection and fertilization. Finally, a common question in regards to hormonal therapies is their effect on gamete quality, compared to naturally maturing or spawning broodfish. The main factors that may have significant consequences on gamete quality-mainly on eggs-and should be considered when choosing a spawning induction procedure include (a) the developmental stage of the gonads at the time the hormonal therapy is applied, (b) the type of hormonal therapy, (c) the possible stress induced by the manipulation necessary for the hormone administration and (d) in the case of artificial insemination, the latency period between hormonal stimulation and stripping for in vitro fertilization.

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Induced spermiation in 3-year-old sterlet, Acipenser ruthenus L.

Cited by 9 publications

References 26 publications

Sperm quality and effects of different cryomedia on spermatozoa motility in first-time spawning of cultured Russian sturgeon (Acipenser gueldenstaedtiiBrandt & Ratzeburg, 1833)

Sperm quality and effects of different cryomedia on spermatozoa motility in first-time spawning of cultured Russian sturgeon (Acipenser gueldenstaedtiiBrandt & Ratzeburg, 1833)

Hormonal manipulations for the enhancement of sperm production in cultured fish and evaluation of sperm quality

Broodstock management and hormonal manipulations of fish reproduction

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