Artificial spawning in cultured sterlet sturgeon, Acipenser ruthenus L., with special emphasis on hermaphrodites

Williot, Patrick; Brun, R.; Rouault, Thierry; Pelard, Marcel; Mercier, Daniel; Ludwig, Arne

doi:10.1016/j.aquaculture.2005.02.048

Cited by 57 publications

(45 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some microsatellites may be under selection, either directly or indirectly (through linkage), resulting in distorted segregation ratios. Excess transmission of a single allele at two microsatellite loci was also observed in artificial crosses of the sterlet sturgeon, A. ruthenus (Williot et al., 2005).…”

Section: Discussionmentioning

confidence: 87%

Development and standardization of disomic microsatellite markers for lake sturgeon genetic studies

Welsh

May

2006

J Appl Ichthyol

View full text Add to dashboard Cite

Lake sturgeon (Acipenser fulvescens) are of conservation concern in North America. To facilitate the recovery of this fish species, an understanding of their population genetic structure is necessary to develop and implement spatially and temporally appropriate management actions. Until recently, few genetic data using nuclear loci have been collected, primarily due to the paucity of suitable genetic markers because most microsatellite loci in lake sturgeon appeared to be tetrasomic. The authors identified nine microsatellite loci (from 254 examined) that were putative polymorphic disomic loci and tested their conformance to a disomic mode of inheritance using three lake sturgeon families. The objectives of the study were to: (i) confirm the disomic status of the nine loci through inheritance testing, and (ii) standardize the genetic markers among participating laboratories. At all nine loci, disomic inheritance were confirmed, and all nine loci segregated independently in the 26 of 36 loci pairs possible to test. One of the nine loci showed non-Mendelian segregation, possibly due to meiotic drive and/or selection. Three progeny had peak patterns inconsistent with disomy at one or more loci. The nine loci when combined with four microsatellite loci previously confirmed in other studies as disomic in lake sturgeon now yield a suite of 13 microsatellite markers. These 13 markers have been standardized among four other laboratories to facilitate building an inter-laboratory genetic database for lake sturgeon.

show abstract

Section: Discussionmentioning

confidence: 87%

Development and standardization of disomic microsatellite markers for lake sturgeon genetic studies

Welsh

May

2006

J Appl Ichthyol

View full text Add to dashboard Cite

show abstract

“…The only available reference that confirms existence of senescence in sturgeons is that of Lagutov and Lagutov (2008). A study by Williot et al (2005) registered senescence in aquaculture populations, and it was hypothesized by Williot (personal communication) that it should be also present in the nature. On the other hand, most of the interviewed sturgeon experts were either uncertain whether senescence exists in sturgeons, or they were even certain that sturgeons can spawn throughout their whole life.…”

Section: Discussionmentioning

confidence: 99%

Population viability analysis of the Danube sturgeon populations in a Vortex simulation model

Jarić¹,

Ebenhard

Lenhardt³

2009

Rev Fish Biol Fisheries

View full text Add to dashboard Cite

Populations of six sturgeon species in the Danube River (beluga, Russian sturgeon, stellate sturgeon, sterlet, ship sturgeon and Atlantic sturgeon) have experienced severe decline during the last several decades, mostly due to the unsustainable fishery, river fragmentation and water pollution. Present lack of knowledge on basic sturgeon demography, life history and relative effects of different negative factors is further hindering implementation of efficient policy and management measures. In the present study, population viability analysis in a Vortex simulation model has been conducted in order to assess the state of the six Danube sturgeon species, their future risk of extinction and to determine the most suitable conservation and management measures. Population viability analysis has revealed a large sensitivity of the Danube sturgeon populations to changes in the natural mortality, fecundity, age at maturity and spawning frequency. It was also confirmed that the sturgeons are highly susceptible to even moderate levels of commercial fishery, and that their recovery is a multi-decadal affair. Stocking with adult individuals was shown to produce considerably greater effect on population persistence than stocking with juveniles, but the latter approach is probably still preferable since it avoids many inherent problems of aquaculture cultivation. This study represents the first population viability analysis of the Danube sturgeons.

show abstract

“…Indeed, removal of sturgeon species resulted in a nonsignificant correlation (P ¼ 0.14). In aquaculture, sturgeons also do not reproduce annually, indicating that oogenesis may require several years in this group (Doroshov et al 1997;Williot et al 2005). Still, the absence of annual reproduction is associated with a lack of annual spawning migrations in sturgeons (Chapman et al 1996;Erickson and Webb 2007).…”

Section: Longevity and Skipped Spawningmentioning

confidence: 99%

Influence of Skipped Spawning and Misspecified Reproductive Schedules on Biological Reference Points in Sustainable Fisheries

Secor

2008

Trans Am Fish Soc

View full text Add to dashboard Cite

During the spawning season, adult striped bass Morone saxatilis can occur outside known spawning tributaries. This phenomenon has been observed in other fishes, suggesting that investigators have misspecified reproductive schedules by assuming annual spawning. Across a range of species, skipped (i.e., nonannual) spawning is positively correlated with longevity. Therefore, reproductive schedules that are misspecified due to skipped spawning or poorly known age at maturation are likely for many moderately to extremely long‐lived species. To explore the relevance of misspecified reproductive schedules on sustainable fisheries, a range of types of skipped spawning was modeled for the Chesapeake Bay striped bass population to test for effects on the biological reference point of egg production per recruit. The influence of misspecified reproductive rates was minor, particularly in relation to the effects of the two alternative size limits (46 and 71 cm) that are most commonly used in fisheries management. Among misspecification scenarios, reduced frequency of spawning later in life had the largest effect on reproductive rate. As fisheries management increasingly focuses on thresholds that promote resiliency, increased recognition of variation in reproductive schedules will probably place greater emphasis on conservation of age structure.

show abstract

Artificial spawning in cultured sterlet sturgeon, Acipenser ruthenus L., with special emphasis on hermaphrodites

Cited by 57 publications

References 22 publications

Development and standardization of disomic microsatellite markers for lake sturgeon genetic studies

Development and standardization of disomic microsatellite markers for lake sturgeon genetic studies

Population viability analysis of the Danube sturgeon populations in a Vortex simulation model

Influence of Skipped Spawning and Misspecified Reproductive Schedules on Biological Reference Points in Sustainable Fisheries

Contact Info

Product

Resources

About