The cost of being valuable: predictors of extinction risk in marine invertebrates exploited as luxury seafood

Purcell, Steven W; Polidoro, Beth; Hamel, Jean‐François; Gamboa, Ruth U.; Mercier, Annie

doi:10.1098/rspb.2013.3296

Cited by 119 publications

(96 citation statements)

References 49 publications

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“…Este mismo aspecto se puede observar con la densidad de pepinos de mar, específi-camente con la especie Isostichopus fuscus, la cual posee un alto valor comercial (Purcell, Polidoro, Hamel, Gamboa, & Mercier, 2014), y en la isla posee una densidad promedio de 550 ind ha -1 . Esta densidad es menor a la observada en las Islas Galápagos, 833 ind ha -1 (Edgar et al, 2004), y a su vez es superior a la determinada en el Parque Nacional Bahía de Loreto (280 ind ha -1 ), en Baja California Sur, México (Reyes-Bonilla, Herrero-Pérezrul, González-Romero, González-Peralta, & Ramírez-Hernández, 2008).…”

Section: Diversidad Y Abundancia De Macroinvertebradosunclassified

Ecosistemas coralinos del Parque Nacional Isla del Coco, Costa Rica: estructura y comparación 1987-2014

Barrientos¹,

Beita-Jiménez²,

Mena³

et al. 2016

RBT

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Coral reefs of Isla del Coco National Park, Costa Rica: structure and comparison (1987-2014).Isla del Coco has one of the most diverse and well-conserved coral reefs in Costa Rica. These reefs have been extensively studied since the 1980's, however those studies focused mainly on coral coverage. The aim of this study is to evaluate the coral reefs of the island, not only by the coverage of the substrate but also the composition of fish, invertebrates and reef complexity. A total of 17 sites around the island were sampled in July 2013 and in February-March 2014. At each site, we evaluated three depths (4-8 m, 9-12 m and 13-16 m), where three 10m long transects were sampled. Turf algae was the predominant substrate cover with 38.18±5.58 %. The crustose calcareous algae (Order Corallinales) had a 28.12±5.85 % cover and live coral was 18.64±3.55 %, with Porites lobata as the main reef builder. A total of 18 taxa of macroinvertebrates were observed in the study sites, of which 56 % of the species were not abundant, 33 % were common, and the sea urchin Diadema mexicanum was the only dominant species. The density of lobsters of the genus Panulirus was 388±385 ind ha -1 , which is the highest density reported in the Eastern Tropical Pacific. Also we observed high densities of the sea cucumber Isostichopus fuscus (550 ind ha -1 ), which has a high commercial value. We recorded 45 338 fish individuals, distributed in 93 species, with an average of 1.2±8.5 tn ha -1 . From the total of species, 51 % were uncommon, 31 % common, 11 % predominant and 8 % occasional. The fish community at Isla del Coco is represented by a large number of carnivorous species, followed by top predators, herbivores and planktivorous species. According to the fish categories of the IUCN Red List, 16 % of species are in threatened categories and represent 25 % of the total sampled biomass. When comparing with studies carried out from 1987 to the present, the recovery in coral cover over time is evident, mainly due to: 1) a decrease in the pressure of the bioerosive action of D. mexicanum; and 2) the conservation actions that have been taken on the island. This has been translated in complex and more rugose reefs. Isla del Coco reefs are healthy, with functional and complex food webs; where species of high commercial value have large populations. The effectiveness of conservation and management activities in Isla del Coco has resulted in the recovery of the reef communities. Rev. Biol. Trop. 64 (Suppl. 1): S153-S175. Epub 2016 Febrary 01.

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Section: Diversidad Y Abundancia De Macroinvertebradosunclassified

Ecosistemas coralinos del Parque Nacional Isla del Coco, Costa Rica: estructura y comparación 1987-2014

Barrientos¹,

Beita-Jiménez²,

Mena³

et al. 2016

RBT

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“…In marine ecosystems, however, the market values of some invertebrates correlate strongly with their risk of extinction, e.g. invertebrate species considered luxury seafood (Purcell et al 2014 ), providing an exception to the general trend for greater threat to be observed in larger-sized species.…”

Section: Extinction Drivers In Animalsmentioning

confidence: 99%

Reconsidering the Loss of Evolutionary History: How Does Non-random Extinction Prune the Tree-of-Life?

Yessoufou

Davies

2016

Biodiversity Conservation and Phylogenetic Systematics

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Analysing extinction within a phylogenetic framework may seem counter-intuitive because extinction is a priori a non-heritable trait. However, extinction risk is correlated with other traits, such as body size, that show a strong phylogenetic signal. Further, there has been much effort in identifying key traits important for diversifi cation, and recent evidence has demonstrated that the processes of speciation and extinction may be inextricably linked. A phylogenetic approach also allows us to quantify the impact of extinction, for example, as the loss of branches from the tree-of-life. Early work suggested that extinctions might result in little loss of evolutionary history, but subsequent studies indicated that nonrandom extinctions might prune more of the evolutionary tree. Loss of phylogenetic diversity might have ecosystem consequences because functional differences between species tend to be correlated with the evolutionary distances between them. Here we explore how extinction prunes the tree-of-life. Our review indicates that the loss of evolutionary history under non-random extinction (the emerging pattern in extinction biology) might be less pronounced than some previous studies have suggested. However, the loss of functional diversity might still be large, depending on the evolutionary model of trait change. Under a punctuated model of evolution, in which trait differences accrue in bursts at speciation, the number of branches lost is more important than their summed lengths. We suggest that evolutionary models need to be incorporated more explicitly into measures of phylogenetic diversity if we are to use phylogeny as a proxy for functional diversity.

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“…Between 1996 and 2011, the number of countries serving the Chinese sea cucumber market expanded from 35 to 83 and over 90% of the world's tropical coastline now lies within countries that export sea cucumbers to Hong Kong . This surge in consumption has had significant effects for countries that supply the market (Eriksson and Clarke, 2015), and seven traded species are endangered (Purcell et al, 2014b). Globally, at least 38% of sea cucumber fisheries are considered overfished and 24 countries have closed or attempted to close their sea cucumber fisheries due to overfishing (Purcell et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Chinese Trader Perceptions on Sourcing and Consumption of Endangered Seafood

2017

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Growing trade networks through globalization have expanded governance of local environments to encompass multiple scales. The governing role of market actors, such as traders and consumers in importing countries, has been recognized and embraced for sustainable seafood sourcing and trade. The perceptions that affect the conduct of these actors are a potential influence on governance of distal environments. In this paper we investigate the perceptions of sea cucumber traders in China. Sea cucumbers are an important global fishery commodity predominantly traded to China, the world's largest seafood market, and seven traded species are endangered globally. We examine what traders and consumers in China perceive as important issues in seafood markets, and where they perceive the responsibility for sustainable fisheries to lie, to interpret what scope there is for sustainability to become an important issue in China's seafood markets. We find that clusters of perceptions about cultural status, quality, health and food safety, and country of origin influence decisions that consumers make. These norms are rooted in sociocultural practice and drive current trade strategies. While traders do want to mitigate risks and secure supplies, food safety, product quality and country of origin are viewed as more important concerns than stock sustainability. Responsibility for sustainable fishing is perceived to be that of national governments in production countries. Trading practices and consumer perceptions together pose a serious challenge to sustainable seafood markets, further confounded by clandestine cross-border gray trade into China.

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The cost of being valuable: predictors of extinction risk in marine invertebrates exploited as luxury seafood

Cited by 119 publications

References 49 publications

Ecosistemas coralinos del Parque Nacional Isla del Coco, Costa Rica: estructura y comparación 1987-2014

Ecosistemas coralinos del Parque Nacional Isla del Coco, Costa Rica: estructura y comparación 1987-2014

Reconsidering the Loss of Evolutionary History: How Does Non-random Extinction Prune the Tree-of-Life?

Chinese Trader Perceptions on Sourcing and Consumption of Endangered Seafood

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