Sperm competition between alternative reproductive tactics of the Atlantic salmon in vitro

Vladić, Tomislav; Forsberg, Lars A.; Järvi, Torbjörn

doi:10.1016/j.aquaculture.2010.02.024

Cited by 26 publications

(28 citation statements)

References 39 publications

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“…female mimicry or sneaking behaviour, and typically invest a lot of resources in gonadal development, to maximize their reproductive success in the face of sperm competition (Taborsky, 1998;Neff et al, 2003;Fitzpatrick et al, 2016). For instance, Atlantic salmon (Salmo salar) parasitic parr males have a greater proportion of motile sperm and higher sperm adenosine triphosphate (ATP) content, which contributes significantly to higher fertility under competition than their larger anadromous or guard counterparts (Vladićand Järvi, 2001;Vladićet al, 2010). A similar phenomenon has been observed for other aquatic species (Oliveira et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Ovarian fluid impacts flagellar beating and biomechanical metrics of sperm between alternative reproductive tactics

Butts

Prokopchuk

Kašpar

et al. 2017

Journal of Experimental Biology

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Alternative reproductive tactics (ARTs) are prevalent in nature, where smaller parasitic males typically have better sperm quality than larger territorial guard males. At present, it is unclear what is causing this phenomenon. Our objective was to gain insights into sperm form and function by examining flagellar beating patterns (beat frequency, wave amplitude, bend length, bend angle, wave velocity) and biomechanical sperm metrics (velocity, hydrodynamic power output, propulsive efficiency) of wild spawning Chinook salmon ARTs. Ovarian fluid and milt were collected to form a series of eight experimental blocks, each composed of ovarian fluid from a unique female and sperm from a unique pair of parasitic jack and guard hooknose males. Sperm from each ART were activated in river water and ovarian fluid. Flagellar parameters were evaluated from recordings using high-speed video microscopy and biomechanical metrics were quantified. We show that ART has an impact on flagellar beating, where jacks had a higher bend length and bend angle than hooknoses. Activation media also impacted the pattern of flagellar parameters, such that beat frequency, wave velocity and bend angle declined, while wave amplitude of flagella increased when ovarian fluid was incorporated into activation media. Furthermore, we found that sperm from jacks swam faster than those from hooknoses and required less hydrodynamic power output to propel themselves in river water and ovarian fluid. Jack sperm were also more efficient at swimming than hooknose sperm, and propulsive efficiency increased when cells were activated in ovarian fluid. The results demonstrate that sperm biomechanics may be driving divergence in competitive reproductive success between ARTs.

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Section: Introductionmentioning

confidence: 99%

Ovarian fluid impacts flagellar beating and biomechanical metrics of sperm between alternative reproductive tactics

Butts

Prokopchuk

Kašpar

et al. 2017

Journal of Experimental Biology

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“…Besides sperm ATP content, sperm velocity was found to be the most important determinant of success in sperm competition (Gage et al 2004;Burness et al 2004;Yeates et al 2007). In addition, salmon parr were found to produce more ATP per sperm cell and are beter in fertilizing eggs both in the non-competitive situation (Vladić & Järvi 2001) and in sperm competition (Vladić et al 2010) confirming thereby the loaded model of sperm competition (Parker 1998). Sperm density in the competition is high; therefore all eggs in externally fertilizing fish are expected to be fertilized instantaneously.…”

Section: Sperm Competition In Salmonidsmentioning

confidence: 49%

“…Means and variances are derived from the numbers of offspring surviving to maturity rather than from individual reproductive success (Campton 2004). Numbers of offspring surviving to maturity are affected by life history patterns of fish under consideration, as it was shown that salmon precocious parr males produce ejaculates of greater quality (Vladić & Järvi 2001: Vladić et al 2010, in accordance with predicted inverse relationship between fish age and gamete quality (Fleming 1996). Therefore, maximizing number of founders is expected to maximize genetic diversity in the population.…”

Section: Human Impact On Salmonid Ejaculate Allocation and Heritabilimentioning

confidence: 79%

“…Although sperm potency leads to increased individual fertilization success, it may also lead to decreased genetic variation within populations when sperm traits are heritable due to increased variance in fertilization success between competing males and consequently decreased effective population size. Therefore equalizing milt volume in hatcheries should not necessarily reduce loss of genetic variation even at expense of favouring younger males in competition (Vladić et al 2010), because this practice reduces opportunity for natural selection to cleanse locally maladapted genetic contribution (Wedenkind et al 2007). Effective number of breeders is defined as (Ridley 1993):…”

Section: Human Impact On Salmonid Ejaculate Allocation and Heritabilimentioning

confidence: 99%

See 1 more Smart Citation

Ejaculate Allocation and Sperm Competition in Alternative Reproductive Tactics of Salmon and Trout: Implications for Aquaculture

Vladić¹

2011

Recent Advances in Fish Farms

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“…Similarly, higher ATP concentrations per cell have been related to superior competitiveness of sperm of mature S . salar parr over that of anadromous males (Vladić et al ., ). In addition, Burness et al .…”

Section: Sperm Cell Densities Atp Levels Enzymatic Activities Flagmentioning

confidence: 97%

Sperm traits in farmed and wild Atlantic salmon Salmo salar

Camarillo-Sepulveda

Hamoutene

Lush

et al. 2015

Journal of Fish Biology

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Differences in sperm metabolism and morphology between wild and non-local farmed Atlantic salmon Salmo salar were assessed by measuring metabolic enzyme activities and length of sperm flagella. No differences were observed between wild and farmed S. salar sperm with regards to cell counts or any of the biochemical variables assessed. Flagella of sperm cells were significantly longer in wild than farmed S. salar; however, this did not result in higher energy levels or different fertilization rates.

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Sperm competition between alternative reproductive tactics of the Atlantic salmon in vitro

Cited by 26 publications

References 39 publications

Ovarian fluid impacts flagellar beating and biomechanical metrics of sperm between alternative reproductive tactics

Ovarian fluid impacts flagellar beating and biomechanical metrics of sperm between alternative reproductive tactics

Ejaculate Allocation and Sperm Competition in Alternative Reproductive Tactics of Salmon and Trout: Implications for Aquaculture

Sperm traits in farmed and wild Atlantic salmon Salmo salar

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