The spermiation period in the rainbow trout (Salmo gairdneri). Plasma gonadotropin and androgen levels, sperm production and biochemical changes in the seminal fluid

Sánchez-Rodríguez, Dolores; Escaffre, Anne-Marie; Marlot, Sylviane; Reinaud, Pierrette

doi:10.1051/rnd:19780529

Cited by 51 publications

(22 citation statements)

References 4 publications

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“…According to our results, the values of semen volume, sperm density and spermatocrit declined by increasing of stripping frequency as previously reported for Atlantic salmon, salmo salar [1] , but unlike that seen over weekly stripping f rom landlocked salmon, Salmo salar M. sebago girard [32] and biweekly stripping from rainbow trout [35] . The decrease of spermatocrit during sequential strippings may be due to the three possible reasons including the decreasing of spermiation rate, higher hydration of testis and the higher secretion of seminal fluid.…”

Section: Discussionsupporting

confidence: 70%

“…Likely, such regulation may be controlled by pituitary hormones as Sanchez-Rodriquez et al [35] have reported the gonadotropin control of the sodium levels in the seminal fluid of rainbow trout. Lahnsteiner et al [23] reported that some proteins of seminal fluid were shown to have a key role in the motility of spermatozoa.…”

Section: Discussionmentioning

confidence: 99%

“…Few studies have shown that the fish semen characteristics could be affected by stripping frequency [9,13,32,35,37] . The Caspian brown trout, Salmo trutta caspius is a critically endangered anadromous species that has been considered for a biological conservation program in the southern part of the Caspian Sea [16] .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Stripping Frequency on Semen Quality of Endangered Caspian Brown Trout, Salmo trutta caspius

Hajirezaee¹,

Amiri²,

Mirvaghefi³

2009

American J. of Animal and Veterinary Sciences

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Problem statement: Because of dramatic declines in stocks of endangered Caspian brown trout males, Salmo trutta caspius in Caspian Sea, each male brooder is stripped indispensably more than once during the spawning season in other to artificial insemination in hatchery. The aim of the present study was to assay the changes of indicators of semen quality (sperm motility, sperm production, semen volume and chemical composition of seminal fluid) during these sequential strippings. Approach: The 11 tagged males were stripped four times every 12-14 days with beginning of spermiation period (2 December 2008) towards its end (10 January 2008). One-way Analysis Of Variance (ANOVA) was employed to analyze differences between means of semen parameters. Also, the relationships between semen parameters were tested using the bivariate correlation coefficients of Pearson. Results: The semen volume, sperm density, osmolality and the concentrations of Na + , Cl − , K + , Ca 2+ , Mg 2+ and total protein gradually decreased whereas the values of glucose and triglyceride had no significant changes during sequential strippings. Also, the values of semen pH, the percentage (5s post-activation) and duration of motility were statistically stable until third stripping but a decrease was recorded for these parameters in the fourth stripping. As well as, significant positive correlations were found for sperm density vs. K + , Cl − , Na + , Ca 2+ , Mg 2+ , total protein, spermatocrit; the percentage of motile spermatozoa Vs Ca 2+ , Mg 2+ , K + , Cl − , Na + , total protein and also the duration of motility Vs K + , Cl − , total protein and pH. Conclusion: The semen quality of Caspian brown trout males decrease in successive strippings during spawning season. Also, the knowledge on values and correlations between the sperm motility characteristics and the composition of seminal fluid could be useful to formulation of a species-specific extender solution for cryopreservation of semen of Caspian brown trout.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 99%

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Effects of Stripping Frequency on Semen Quality of Endangered Caspian Brown Trout, Salmo trutta caspius

Hajirezaee¹,

Amiri²,

Mirvaghefi³

2009

American J. of Animal and Veterinary Sciences

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“…During the first sampiing, a high variability in protein and AP was observed which did not permit conclusions on trends of sperm parameters during this period. Similar patterns of changes in rainbow trout protein concentrations during the sperm production cycle were observed by Sanchez-Rodriguez et al (1978) in their 12-week experiment. However, steady increases in sperm concentrations were observed at the same time.…”

Section: Osmolality Of Seminal Plasmasupporting

confidence: 55%

Effects of season and dietary ascorbic acid on some biochemical characteristics of rainbow trout (Oncorhynchus mykiss) semen

Ciereszko

Liu

Dąbrowski

1996

Fish Physiol Biochem

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During the reproductive season, rainbow trout spermatozoa are stored in the sperm ducts for several months. There is no sperm production at this time since spermatogenesis is completed before spawning. To leam more about characteristics of semen during such a long storage, we analyzed changes in protein concentrations, anti-proteinase activity in seminal plasma and sperm aspartate aminotransferase activity during an extended reproductive period during which fish were fed diets supplemented with various ascorbic acid concentrations. Seminal plasma protein concentration and anti-proteinase activity declined toward the end of the reproductive season. These phenomena may be related to oncoming proteolytic events leading to degradation of the sperm. Protein concentrations and anti-proteinase activities were strongly correlated within groups of different ascorbic acid supplementations and several sampling dates (r=0.6-0.9 in most cases, p<0.05). Ascorbic acid deficiency resulted in a decrease in both parameter levels as compared to levels in groups with vitamin C supplement (p<0.08). Deficiency also resulted in lower stimulation of aspartate aminotransferase by an exogenous pyridoxal 5'-phosphate in comparison to fish fed vitamin C-supplemented diets (p<0.05). These results support earlier studies suggesting a protective role of ascorbic acid toward maintaining sperm quality.

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“…In this study, the seminal plasma protein content was determined to amount to 0.48 ± 0.02 g/l, which was a similar value to Salmo trutta caspius (Hatef et al, 2007). The total content of proteins in seminal plasma decreases in the second phase of spermiation (Sanchez-Rodriguez et al, 1978). It is supposed that this component may play an important protective role for spermatozoa and it contains a number of key enzymes of the metabolic process (Lahnsteiner et al, 1995;Kowalski et al, 2003).…”

Section: Discussionmentioning

confidence: 94%

Relationships between seminal plasma composition and sperm quality parameters of the Salmo trutta macrostigma (Dumeril, 1858) semen: with emphasis on sperm motility

Bozkurt¹,

Ogretmen²,

Kökçü³

et al. 2011

Czech J. Anim. Sci.

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The mineral and organic composition of seminal plasma, physical spermatological parameters and their physiological relationships were investigated in Salmo trutta macrostigma. The seminal plasma contained 121.0 ± 0.37mM/l (Na+), 8.18 ± 0.03mM/l (K+), 7.23 ± 0.03 mg/dl (Ca2+), 3.19 ± 0.02 mEq/l (Mg++), 0.48 ± 0.02 g/dl total protein, 6.07 ± 0.06 mg/dl cholesterol, 6.24 ± 0.08 mg/dl triglyceride and 9.97 ± 0.39 mg/dl urea. The following physical spermatological parameters were found out: sperm volume 13.93 ± 0.84 ml, sperm motility 80.37 ± 2.36%, movement duration 81.47 ± 4.21 s, density 6.02 ± 0.46 × 109/ml, total density 8.85 ± 6.12 × 109 and pH 7.53 ± 0.20. Significant positive relationships were determined between motility duration and motility (r = 0.83, P < 0.01) and also between spermatocrit and motility (r = 0.536, P < 0.05). Sperm volume and total density negatively correlated with motility (r = –0.191, P > 0.05 and r = –0.087, P > 0.05, respectively). The Na+, K+ and Cl– ions correlated negatively with motility (r = –0.267, P > 0.05, r = –0.152, P > 0.05 and r = –0.461, P > 0.05, respectively). On the other hand, the Ca2+ and Mg2+ ions correlated positively with motility (r = 0.114, P > 0.05 and r = 0.040, P > 0.05, respectively). A significant negative relationship was found between motility and urea (r = –0.515, P < 0.05). These parameters should be considered when developing procedures for short-term storage or cryopreservation of the Salmo trutta macrostigma sperm.

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The spermiation period in the rainbow trout (Salmo gairdneri). Plasma gonadotropin and androgen levels, sperm production and biochemical changes in the seminal fluid

Cited by 51 publications

References 4 publications

Effects of Stripping Frequency on Semen Quality of Endangered Caspian Brown Trout, Salmo trutta caspius

Effects of Stripping Frequency on Semen Quality of Endangered Caspian Brown Trout, Salmo trutta caspius

Effects of season and dietary ascorbic acid on some biochemical characteristics of rainbow trout (Oncorhynchus mykiss) semen

Relationships between seminal plasma composition and sperm quality parameters of the Salmo trutta macrostigma (Dumeril, 1858) semen: with emphasis on sperm motility

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