Acipenseriformes: CITES implementation from Range States to consumer countries

Raymakers, Caroline; Hoover, Calvin B.

doi:10.1046/j.1439-0426.2002.00398.x

Cited by 36 publications

(32 citation statements)

References 1 publication

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“…The caviar obtained from different sturgeon species provides another example for the potential for the feedback loop we describe here. Not only are all sturgeon species currently on the IUCN Red List and CITES Appendices [14,15], but the price of the caviar is correlated with its rarity [16]. Abalones, of which six species suffer from overfishing on the Pacific coast of North America, are another illustration.…”

Section: Model and Resultsmentioning

confidence: 99%

Rarity Value and Species Extinction: The Anthropogenic Allee Effect

et al. 2006

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Standard economic theory predicts that exploitation alone is unlikely to result in species extinction because of the escalating costs of finding the last individuals of a declining species. We argue that the human predisposition to place exaggerated value on rarity fuels disproportionate exploitation of rare species, rendering them even rarer and thus more desirable, ultimately leading them into an extinction vortex. Here we present a simple mathematical model and various empirical examples to show how the value attributed to rarity in some human activities could precipitate the extinction of rare species—a concept that we term the anthropogenic Allee effect. The alarming finding that human perception of rarity can precipitate species extinction has serious implications for the conservation of species that are rare or that may become so, be they charismatic and emblematic or simply likely to become fashionable for certain activities.

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Section: Model and Resultsmentioning

confidence: 99%

Rarity Value and Species Extinction: The Anthropogenic Allee Effect

et al. 2006

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“…In parallel to this decline in wild stocks, and driven by the economic value of caviar, efforts have been made to develop commercial aquaculture programmes to produce caviar, originally in Europe and North America, but more recently also in Caspian Sea range states such as Russia and Iran (Raymakers & Hoover ). At the present time, it is estimated well over 50% of caviar in trade is harvested from farmed stocks (Bronzi et al .…”

Section: Introductionmentioning

confidence: 99%

Sturgeon conservation genomics: SNP discovery and validation using RAD sequencing

et al. 2013

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Caviar-producing sturgeons belonging to the genus Acipenser are considered to be one of the most endangered species groups in the world. Continued overfishing in spite of increasing legislation, zero catch quotas and extensive aquaculture production have led to the collapse of wild stocks across Europe and Asia. The evolutionary relationships among Adriatic, Russian, Persian and Siberian sturgeons are complex because of past introgression events and remain poorly understood. Conservation management, traceability and enforcement suffer a lack of appropriate DNA markers for the genetic identification of sturgeon at the species, population and individual level. This study employed RAD sequencing to discover and characterize single nucleotide polymorphism (SNP) DNA markers for use in sturgeon conservation in these four tetraploid species over three biological levels, using a single sequencing lane. Four population meta-samples and eight individual samples from one family were barcoded separately before sequencing. Analysis of 14.4 Gb of paired-end RAD data focused on the identification of SNPs in the paired-end contig, with subsequent in silico and empirical validation of candidate markers. Thousands of putatively informative markers were identified including, for the first time, SNPs that show population-wide differentiation between Russian and Persian sturgeons, representing an important advance in our ability to manage these cryptic species. The results highlight the challenges of genotyping-by-sequencing in polyploid taxa, while establishing the potential genetic resources for developing a new range of caviar traceability and enforcement tools.

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“…All sturgeon species have been added to the Convention on International Trade in Endangered Species of Wild Fauna Figure 2). Adapted from a brochure "To Save the Salmon," U. S. Army Corps of Engineers, Portland District (1997). and Flora (CITES), Appendix II, which went into effect in 1998 (Gisbert and Williot, 2002), and which is intended to restrict trafficking in endangered sturgeon materials (Raymakers and Hoover, 2002).…”

Section: Introductionmentioning

confidence: 99%

A Riparian Habitat Hypothesis for Successful Reproduction of White Sturgeon

Coutant

2004

Reviews in Fisheries Science

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White sturgeon (Acipenser transmontanus) has recruitment failure or severe interannual variability in much of its range. Exceptions are Columbia River below Bonneville Dam, Snake River below Hells Canyon Dam, lower Fraser River, and Sacramento River. Since rivers were impounded or flows regulated, once-continuous populations now isolated by natural barriers or dams often have not reproduced successfully, despite successful spawning events. Research has not adequately explained recruitment failures or why certain populations are successful. This paper proposes that submerged riparian habitat during seasonal high water is needed for early development. Where recruitment is successful, channels are complex and floodable riparian vegetation or rocky substrate is abundant. There, spawning occurs in turbulent zones upstream (1-5 km) of seasonally submerged riparian habitat, eggs can disperse into inundated habitat and adhere to newly wetted surfaces for incubation, yolk-sac larvae can move to riparian crevices for prefeeding development, feeding larvae have food-rich flooded habitat for early growth, and larvae can transition to juveniles as water recedes to permanent channels. Such habitat is lacking where recruitment is low and present only in high-flow years where recruitment is sporadic. These observations suggest that management should rehabilitate riparian zones and provide high river flows during spawning to stimulate natural recruitment.

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Acipenseriformes: CITES implementation from Range States to consumer countries

Cited by 36 publications

References 1 publication

Rarity Value and Species Extinction: The Anthropogenic Allee Effect

Rarity Value and Species Extinction: The Anthropogenic Allee Effect

Sturgeon conservation genomics: SNP discovery and validation using RAD sequencing

A Riparian Habitat Hypothesis for Successful Reproduction of White Sturgeon

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