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Wang S.-L.,Key Laboratory of Aquatic Genetic Resources and Their Utilization | Niu D.-H.,Key Laboratory of Aquatic Genetic Resources and Their Utilization | Jia M.-J.,Key Laboratory of Aquatic Genetic Resources and Their Utilization | Li J.-L.,Key Laboratory of Aquatic Genetic Resources and Their Utilization | And 2 more authors.
Conservation Genetics | Year: 2010

Nine polymorphic microsatellite loci were isolated and characterized from an AC-enriched genomic library of Bullacta exarata. They were polymorphic in 30 individuals from Qidong in Jiangsu Province, China. The number of alleles per polymorphic loci varied from 7 to 14 and the values of observed heterozygosity and expected heterozygosity ranged from 0. 2593 to 0. 9667 and from 0. 7090 to 0. 9164, respectively. Six of the nine microsatellites conformed to Hardy-Weinberg equilibrium, and inherited independently. These informative microsatellite markers will be useful in studies of population genetic structure for this species. © 2009 Springer Science+Business Media B.V. Source


Bai Z.Y.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources | Niu D.H.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources | Le Li J.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources | Le Li J.,Shanghai Ocean University
Conservation Genetics Resources | Year: 2011

Hyriopsis cumingii is the most important species for freshwater pearl culture in China. Seventeen polymorphic microsatellite repeat markers were identified from mantle expressed sequence tags of Hyriopsis cumingii. The number of alleles per locus ranged from two to 22, the observed and expected heterozygosities ranged from 0.042 to 1.000 and from 0.061 to 0.962, respectively. These markers should be useful for population genetics studies, parentage and genome mapping in this species. © Springer Science+Business Media B.V. 2011. Source


Rupia E.J.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources | Rupia E.J.,Shanghai Ocean University | Binning S.A.,University of Neuchatel | Roche D.G.,University of Neuchatel | And 2 more authors.
Journal of Animal Ecology | Year: 2016

Survival depends on appropriate behavioural and physiological responses to danger. In addition to active ‘fight-flight’ defence responses, a passive ‘freeze-hide’ response is adaptive in some contexts. However, the physiological mechanisms determining which individuals choose a given defence response remain poorly understood. We examined the relationships among personality, metabolic performance and physiological stress responses across an environmental gradient in the olive flounder, Paralichthys olivaceus. We employed four behavioural assays to document the existence of two distinct behavioural types (‘bold’ and ‘shy’) in this species. We found consistent metabolic differences between individuals of a given behavioural type across an environmental gradient: shy individuals had overall lower aerobic scope, maximum metabolic rate and standard metabolic rate than bold individuals in both high (25 ppt) and low (3 ppt) salinity. These behavioural and metabolic differences translated into divergent physiological responses during acute stress: shy individuals adopted a passive ‘freeze-hide’ response by reducing their oxygen consumption rates (akin to shallow breathing) whereas bold individuals adopted an active ‘fight-flight’ response by increasing their rates of respiration. These distinct defence strategies were repeatable within individuals between salinity treatments. Although it has been suggested theoretically, this is the first empirical evidence that the metabolic response to stressful situations differs between bold and shy individuals. Our results emphasize the importance of incorporating physiological measures to understand the mechanisms driving persistent inter-individual differences in animals. © 2016 The Authors. Journal of Animal Ecology © 2016 British Ecological Society Source


Li L.,Ocean University of China | Lu W.,Ocean University of China | Lu W.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources | Lu W.,Shanghai Ocean University | And 7 more authors.
Journal of Shellfish Research | Year: 2015

Understanding the impact of ocean acidification and warming on communities and ecosystems is a researcher priority. This can only be achieved through a combination of experimental and field approaches that would allow developing a mechanistic understanding of impacts across level of biological organizations. Surprisingly, most published studies are still focusing on single species responses with little consideration for interspecific interactions. In this study, the impacts of a 3 days exposure to three parameters (temperature, pH, and presence/absence of the predator cue of the crab Charybdis japonica) and their interactions on an ecologically important endpoint were evaluated: the byssus production of the mussel Mytilus coruscus. Tested temperatures (25°C and 30°C) were within the present range of natural variability whereas pH (8.1, 7.7, and 7.4) covered present as well as near-future natural variability. As expected, the presence of the crab cue induced an antipredator response in Mytilus coruscus (significant 10% increase in byssus secretion rate, 22% increase in frequency of shed byssus, and 30% longer byssus). Decreased pH but not temperature had a significant negative impact on the same endpoints (up to a 17% decrease in byssus secretion rate, 40% decrease in frequency of shed byssus, and 10% shorter byssus at pH 7.3 as compared with pH 8.1) with no significant interactions between the three tested parameters. In this study, it has been hypothesized that pH and predator cue have different modes of action and lead to conflicting functional responses (escape response versus stronger attachment). Functional consequences for ecosystem dynamics still need to be investigated. Source


Sui Y.,Shanghai Ocean University | Kong H.,Shanghai Ocean University | Huang X.,Shanghai Ocean University | Dupont S.,Gothenburg University | And 10 more authors.
Chemosphere | Year: 2016

Hypoxia and ocean acidification are two consequences of anthropogenic activities. These global trends occur on top of natural variability. In environments such as estuarine areas, short-term acute pH and O2 fluctuations are occurring simultaneously. The present study tested the combined effects of short-term seawater acidification and hypoxia on the physiology and energy budget of the thick shell mussel Mytilus coruscus. Mussels were exposed for 72 h to six combined treatments with three pH levels (8.1, 7.7 and 7.3) and two dissolved oxygen (DO) levels (2 mg L-1, 6 mg L-1). Clearance rate (CR), food absorption efficiency (AE), respiration rate (RR), ammonium excretion rate (ER), O:N ratio and scope for growth (SFG) were significantly reduced, and faecal organic dry weight ratio (E) was significantly increased at low DO. Low pH did not lead to a reduced SFG. Interactive effects of pH and DO were observed for CR, E and RR. Principal component analysis (PCA) revealed positive relationships among most physiological indicators, especially between SFG and CR under normal DO conditions. These results demonstrate that Mytilus coruscus was sensitive to short-term (72 h) exposure to decreased O2 especially if combined with decreased pH levels. In conclusion, the short-term oxygen and pH variation significantly induced physiological changes of mussels with some interactive effects. © 2016 Elsevier Ltd. Source

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