Sturgeons (Pisces: Acipenseridae); threats and prospects

Rochard, E.; Castelnaud, Gérard; Lepage, Mario

doi:10.1111/j.1095-8649.1990.tb05028.x

Cited by 179 publications

(128 citation statements)

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“…Adequate national and international funding must be provided to enable further research on the biology of sturgeons and paddlefishes and to support immediate measures for their protection. Moreover, management efforts and funding should be directed at the most threatening impacts, such as habitat fragmentation and habitat loss, as well as bycatch or poaching (Rochard et al 1990). Recent research has provided agencies with effective tools to identify and prioritise conservation measures with which to in crease the effectiveness of investment in species protection and risk mediation , Linke et al 2011.…”

Section: Recommendations For Future Research and Managementmentioning

confidence: 99%

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Geßner¹,

Jarić²,

Rochard³

et al. 2013

Endang. Species. Res.

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Section: Recommendations For Future Research and Managementmentioning

confidence: 99%

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Geßner¹,

Jarić²,

Rochard³

et al. 2013

Endang. Species. Res.

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“…However, knowledge about young stages of this species in the wild is limited (Acolas et al 2011b). The specific needs of this migratory species with regard to habitat, as well as vulnerability during migration, due to overfishing and habitat degradation are major factors involved in population collapse over the past few decades (Rochard et al 1990). One species restoration action consists of developing a captive stock to produce offspring for release in river systems in an attempt to boost natural populations (Chebanov et al 2011;IUCN/SSC 2013).…”

Section: Introductionmentioning

confidence: 99%

European sturgeon (Acipenser sturio L.) young of the year performance in different rearing environments –study within a stocking program

2016

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The European sturgeon is critically endangered and the French ex-situ conservation approach involves developing a captive stock to produce offspring for release to boost natural populations. The purpose of our study was to assess the effects of rearing environment before stocking on the survival, growth, and behavior of threemonth-old sturgeons from two different crossings. Enriched rearing was designed to mimic the variability of the natural environment using river water, natural photoperiod, substrate, variable water current and depths. Traditional rearing was carried out with bare tanks, underground water, dark conditions, without current and at constant depth. Fish survival was determined monthly and growth was estimated weekly. Behavior was assessed with exploration and novel prey tests in solitary using video tracking. Results demonstrated that enriched condition resulted in bigger fish from the first month. Growth curve analysis revealed that enriched environment made both fish crossings grow in a similar manner. In contrast, crossings growth differed in traditional rearing which may reflect a genotype-environment interaction. Behavioral data highlighted that enriched-reared fish were slower to explore a new environment but more individuals engaged on doing so than traditional-reared fish. Results also showed that survival was high (>80 %) during all the trial. However, survival was lower during the second month in enriched environment. Our findings advocate for the integration of enriched rearing practices within the juvenile production for release in order to boost the performance linked to fitness. Stocking practices and life history research must work together to favor adaptive aquaculture approaches, which support species conservation.

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“…However, when in the sea, the Italian sturgeon seems to remain near the estuaries (Paccagnella, 1948). Rochard et al (1990) identified three types of life history for the sturgeons and assigned the Italian species to type 2. After spawning, the adults migrate to brackish waters, later followed by the juveniles.…”

Section: Introductionmentioning

confidence: 99%

Acclimation trials of juvenile Italian sturgeon to different salinities: morpho-physiological descriptors

Cataldi¹

1995

Journal of Fish Biology

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In this study the first experimental trials of acclimation to salinities of the Italian sturgeon Acipenser naccarii are described. Preliminary observations regarding some morphological features of the gut, kidney and gills following exposure to 20 and 30‰ salinity are reported, and compared with those displayed by many teleosts in hyper-and hypoosmoregulation. Results are discussed with regard to the osmoregulatory mechanisms and to the physiological limits of adaptability of this species in the second year of its life cycle. Within the Acipenseridae, Acipenser naccarii is generally considered a euryhaline species, but nothing is known about its mechanisms of osmotic homeostasis. This species could be a good candidate for aquaculture in fresh and brackish waters owing to the recent success obtained in artificial reproduction.1995 The Fisheries Society of the British Isles

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Sturgeons (Pisces: Acipenseridae); threats and prospects

Cited by 179 publications

References 0 publications

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

European sturgeon (Acipenser sturio L.) young of the year performance in different rearing environments –study within a stocking program

Acclimation trials of juvenile Italian sturgeon to different salinities: morpho-physiological descriptors

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