Key Laboratory of Healthy Mariculture for the East China Sea

Xiamen, China

Key Laboratory of Healthy Mariculture for the East China Sea

Xiamen, China

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Liu X.,Key Laboratory of Healthy Mariculture for the East China Sea | Liu X.,Jimei University | Zhao G.,Key Laboratory of Healthy Mariculture for the East China Sea | Zhao G.,Jimei University | And 8 more authors.
Current Zoology | Year: 2012

The large yellow croaker Larimichthys crocea is one of the most important fish species in China. To estimate the reproductive success of breeders, three independent full-factorial crosses were created and the fins of breeders and progenies were sampled for microsatellite analysis. Out of 959 offspring from three sets, 99.6% were assigned to their parents using 6-7 microsatellite markers. In all crosses, some parent pairs produced a large number of offspring and some parent pairs did not produce any offspring. The contributions of male or female parents were unequal, ranging from 1.0-89.3% across the three sets. The loss of putative Ne was 69.6% in set 1, 31.2% in set 2 and 57.6% in set 3. These results suggest that the unequal contribution of parents is universal in artificial breeding of L. crocea, especially in a small population, and this should be taken into account in hatcheries or when releasing animals for resource enhancement. © 2012 Current Zoology.


Zhai S.-W.,Jimei University | Liu S.-L.,Jimei University | Liu S.-L.,Key Laboratory of Healthy Mariculture for the East China Sea
Italian Journal of Animal Science | Year: 2013

This trial was conducted to investigate the effects of supplementary quercetin on growth performance, serum lipids levels and whole fish body composition in tilapia (Oreochromis niloticus). Four hundred fish were randomly divided into five treatment groups with four replicates in each group and 20 fish in each replicate. The dietary quercetin levels of the five treatment groups were: 0 (control group), 200, 400, 800, and 1600 mg/kg, respectively; the trial period was 7 weeks. Compared with the control group, specific growth rate and condition factor of quercetin groups were improved significantly (P<0.05). No significant differences in feed conversion rate and survival rate were found between the control group and all quercetin groups (P>0.05). The triglyceride concentration in serum was decreased significantly with the increasing levels of quercetin supplementation (P<0.05), while the highdensity lipoprotein cholesterol concentration was increased significantly by the supplementation of quercetin (P<0.05). The significant difference of low-density lipoprotein cholesterol concentration was found only between control group and highest dietary quercetin level group (P<0.05). The levels of moisture, crude protein and crude lipid of whole fish body were significantly affected by the supplementation of quercetin (P<0.05), the ash levels of all groups were similar (P>0.05). In conclusion, we demonstrated a promotion of growth performance and the reduction of lipid levels in serum and whole fish body with the supplementation of quercetin. © S.W. Zhai and S.L. Liu, 2013.


Zhai S.-W.,Jimei University | Zhai S.-W.,Key Laboratory of Healthy Mariculture for the East China Sea | Lu J.-J.,Jimei University | Chen X.-H.,Jimei University | Chen X.-H.,Key Laboratory of Healthy Mariculture for the East China Sea
Italian Journal of Animal Science | Year: 2014

The present study was performed with tilapia (Oreochromis niloticus) to evaluate the effects of diet supplementation with grape seed proanthocyanidins (GSPs) on fish growth performance, some serum parameters and body composition. Three hundred tilapia fingerlings with the initial average body weight of 9.50±1.25 g were randomly divided into five treatment groups with four replicates in each group and 15 fish in each replicate. The dietary GSPs levels of five treatment groups were 0 (control group), 200, 400, 600, and 800 mg/kg, respectively. The trial period was 49 days. Growth performance parameters were significantly improved by GSPs supplementation (P<0.05), while survival rates were similar among all groups (P>0.05). Serum parameter results showed that activities of aminotransferase aspartate in 200 and 400 mg/kg GSPs groups and alanine aminotransferase in 400 mg/kg GSPs group were lowered significantly (P<0.05). Levels of triglyceride and total cholesterol (except 200 mg/kg GSPs group) were significantly lowered, while lysozyme activity and albumin level were significantly higher in fish of GSPs supplemented groups, independently from the level of supplementation. The highest crude protein level and lowest crude lipid level were found in fish of all GSPs supplemented groups, while levels of moisture and ash in fish of all groups were similar (P>0.05). The results indicated that dietary 200 mg/kg GSPs could exert beneficial effects on growth and body composition of tilapia fingerlings, and ameliorate serum biochemistry parameters related to health status. © S.-W. Zhai et al., 2014.


Zhai S.-W.,Jimei University | Liu S.-L.,Jimei University | Liu S.-L.,Key Laboratory of Healthy Mariculture for the East China Sea
Israeli Journal of Aquaculture - Bamidgeh | Year: 2014

This trial was conducted to investigate the effects of Quercetin on the growth performance, activities of digestive enzymes, and antioxidant potential in the hepatopancreas of tilapia. Four hundred tilapia (Oreochromis niloticus), were randomly divided into five treatment groups with four replicates in each group/ 20 fish per replicate. The dietary Quercetin levels of the five treatment groups were 0, 200, 400, 800, and 1600 mg/kg, respectively. The trial period was 49 days. Rates of weight gain, special growth, feed conversion, and protein efficiency ratio of the Quercetin diet groups improved significantly (P<0.05) compared with the control group. No significant difference in survival rates were found between the control group and all Quercetin diet groups (P>0.05). The activity of protease, lipase, and amylase, in the stomach and intestine significantly increased when the dietary Quercetin level was above 400 mg/kg. The malondialdehyde level, and total antioxidant capacity in the hepatopancreas of Quercetin diet groups decreased significantly while catalase activity of Quercetin diet groups (apart from the group fed 1600 mg/kg Quercetin) increased significantly (P<0.05) with no significant differences between all Quercetin groups. Superoxide dismutase activity was not affected by Quercetin supplementation. The results of the present study suggested that Quercetin supplementation in a tilapia diet could have beneficial effects on digestive enzyme activity, antioxidant potential in the hepatopancreas, and improve growth performance.


Wu Y.-Q.,Nanjing University of Aeronautics and Astronautics | Wu Y.-Q.,Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology | Wu Y.-Q.,Chinese Academy of Fishery Sciences | Wu Y.-Q.,Key Laboratory of Healthy Mariculture for the East China Sea | And 2 more authors.
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2016

As the existing Arimoto entropy-based thresholding methods only depend on the probability information from gray histogram and need to search the whole solution space to obtain the optimal threshold with low efficiency, a fast iterative algorithm for threshold segmentation on the basis of two-dimensional Arimoto gray entropy is proposed. Firstly, a fast iterative algorithm for threshold selection using one-dimensional Arimoto gray entropy is proposed. Secondly, by taking into consideration the gray level uniformity within the object cluster and the background cluster, a two-dimensional Arimoto gray entropy thresholding method on the basis of gray level-average gray level histogram is derived. Then, fast recursive formulae for intermediate variables are given. Finally, a fast ite-rative algorithm is proposed for threshold selection on the basis of two-dimensional Arimoto gray entropy, and the corresponding algorithmic formulae are derived, which helps reduce computation burden greatly. Experimental results show that the proposed algorithm is superior to five existing threshold segmentation algorithms because it runs more rapidly and is more effective in obtaining segmented images with complete objects, clear edges and rich details. © 2016, Editorial Department, Journal of South China University of Technology. All right reserved.


Liu A.,Jimei University | Guo Y.,Jimei University | Guo Y.,Key Laboratory of Healthy Mariculture for the East China Sea | Li S.,National University of Singapore | And 2 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2012

Biodiversity provides a platform humans can thrive on, and it is vital for ensuring the sustainable development of society. China is one of the megadiverse countries in the world, and was also among the earliest to join the Convention on Biological Diversity. Since the launch of the Biodiversity Conservation Plan in China in 1994, researchers in China have devoted more than 10 years of hard work in the area of biodiversity and published a large number of research papers and documents. A search was conducted for papers on biodiversity using the Science Citation Index Expanded, using TS = ("biological diversity OR biodiversity OR "species diversity OR "species richness OR "genetic diversity OR ecosystem* OR communities OR "ecosystem function OR "bio * invasion* OR "invasive species OR "endangered species OR "conservation biology OR "biodiversity conservation OR biogeography OR "new species OR taxonomy OR phylogeny OR "landscape diversity). By analyzing and comparing characteristic figures, this paper accesses the current status and international influence of biodiversity studies in China, and also attempts to provide direction for possible future research. Between 1997 and 2009, 219773 papers addressing various facets of biodiversity were published globally, with twice as many published in 2009 compared with 1997. During these 13 years, China exhibited the fastest growth rate in terms of the quantity of such papers, with 110 papers published in 1997 and 20 times that number published in 2009, when compared with 207 countries and regions in the world. Globally, the percentage of these papers originating in China continues to increase, growing from 1. 23% in 1997 to 7. 81% in 2009. China ranks 7th with 11182 papers published during this time period, representing 5. 08% of the total number published on biodiversity globally. Members of the Chinese Academy of Sciences published the largest quantity of papers related to various facets of biodiversity in the world when compared with the members of other institutes, which is more than twice the average number of the seven major institutes in the United States. However, among the top ten institutes in terms of quantity, China ranks at the bottom based on citations per paper and the h-index. Among the 10 most cited papers with one or more authors from China, all of them are joint efforts of Chinese and international institutes, and none of them has an author from China as the first author or the corresponding author. According to the total citation numbers, citations per paper and the h-index, China did not exhibit a growing global influence in the area of biodiversity. Among the 11182 papers from China, 45 papers had been cited more than 100 times, including only 12 papers with first authors from China. Of the total, 1865 papers had been cited between 10 and 100 times; 3211 papers have not been cited at all, representing 28. 33% of the total. Among the top 10 journals with the most papers from China, six of them are journals from China. Zootaxa from New Zealand led the way with 598 papers from China. According to data from Journal Citation Reports in 2009, the impact factor of Zootaxa is 0. 891, and this journal published the most papers on biodiversity both from China and the world. From 2004 to 2009, it was included in SCI-E, and papers on biodiversity constituted 80% of the total. According to the classification of journals in SCI-E, for both China and the world, the top three subjects with the most papers published related to biodiversity are ecology, environmental studies and plant sciences. Among these three subjects, the 52643 papers on ecology significantly outnumber the 28334 related to environmental studies and 26983 on plant sciences. As for papers from China, 2030 papers on plant sciences exceed the 1486 on ecology and the 1312 papers on environmental studies. Globally, the 25814 papers on marine & freshwater biology rank 4th as a topic and come closely behind environmental studies and plant sciences in terms of quantity. As for China, the 641 papers on marine & freshwater biology only rank 9th in quantity, falling behind ecology, environmental studies and plant sciences by a large margin.


Wu Y.-Q.,Nanjing University of Aeronautics and Astronautics | Wu Y.-Q.,Southwest Petroleum University | Wu Y.-Q.,Huazhong University of Science and Technology | Wu Y.-Q.,Key Laboratory of Healthy Mariculture for the East China Sea | And 3 more authors.
Dianzi Keji Daxue Xuebao/Journal of the University of Electronic Science and Technology of China | Year: 2016

In order to improve the denoising effect of nonlocal means (NLM) algorithm for irregular texture images, an image denoising algorithm of NLM based on clustering by steering kernel and adaptive search windows is proposed in this paper. Firstly, fuzzy c-means (FCM) clustering algorithm based on steering kernel is used to prescreen and classify similar windows. Then, the size of search windows corresponding to each pixel is calculated according to categories of similar windows. The number of similar windows with higher similarity is guaranteed. Finally, image denoising of NLM based on adaptive search windows is carried out for each category. A large number of experimental results show that the proposed improved NLM algorithm has better denoising effect for the images with strong noise or irregular texture images, compared with the three improved NLM algorithms which are based on Zernike moment, principal neighborhood dictionaries (PND), and prescreening of mean-variance, respectively. The textures and edges in images are better preserved. The proposed algorithm is superior to other improved NLM algorithms in objective quantitative evaluation indexes such as peak signal to noise ratio (PSNR) and structural similarity index measurement (SSIM). © 2016, Editorial Board of Journal of Electronic Science and Technology of China. All right reserved.


Wu Y.-Q.,Nanjing University of Aeronautics and Astronautics | Wu Y.-Q.,Nanjing University of Science and Technology | Wu Y.-Q.,Key Laboratory of Geological Information Technology | Wu Y.-Q.,Chinese Academy of Fishery Sciences | And 3 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2015

In view of low gain in contrast and definition of image obtained by the existing image enhancement methods, an adaptive enhancement method is proposed based on non-subsampled shearlet transform(NSST) and constraint of human eye perception information fidelity. Firstly, the input image is decomposed by NSST into a low-frequency sub-band and several high-frequency sub-bands. Then the high-frequency sub-band coefficients are enhanced by a nonlinear transform gain function, while the low-frequency sub-band is processed through local blocking enhancement method. Because the traditional local blocking enhancement method has the problem of discontinuity between image blocks, which results in distortion, the constraint of human eye perception information fidelity is introduced. And then a classical linear optimization model is established according to the constraint to obtain the optimal enhancement parameters, thus the enhancement of low-frequency sub-band is accomplished. Finally, the processed low-frequency sub-band and high-frequency sub-bands are fused and the desired enhanced image is reconstructed. Large numbers of experimental results demonstrate that compared with 4 congener enhancement methods put forward in recent years, the proposed method can achieve images with superior subjective visual effects and has a 50% average increment in quantitative evaluation indicators, such as definition, local contrast and global contrast. Moreover, its real-time performance is also satisfactory. ©, 2015, Board of Optronics Lasers. All right reserved.


Xu K.,Jimei University | Xu K.,Key Laboratory of Healthy Mariculture for the East China Sea | Xu Y.,Jimei University | Xu Y.,Key Laboratory of Healthy Mariculture for the East China Sea | And 8 more authors.
Algal Research | Year: 2016

P. haitanensis is one of the most important economic macroalgae and has great potential as a biofuel or in carbon sequestration. Under both natural and field culturing conditions, P. haitanensis regularly experiences desiccation-rehydration cycles. To investigate the mechanisms of desiccation tolerance, a comparative proteomic analysis was performed using P. haitanensis strain Z-61 blades at 5 different water loss rates followed by a half hour rehydration. Briefly, 100 differentially expressed protein spots were identified, with the largest protein grouping relating to photosynthesis and energy metabolism. By integrating photosynthetic physiologic performance and proteomic profile analyses, we found that P. haitanensis mainly resists desiccation stress by inhibiting photosynthesis and energy metabolisms, as supported by reduced associated protein expression and reduced maximum (Fv/Fm) and effective (Y(II)) photochemical quantum yield of photosystem II (PSII). Meanwhile, the expression levels of most of the other identified differentially expressed proteins were also down-regulated and related to nitrogen, amino acid and protein metabolism, cytoskeleton, transcription and translation, chaperone and fatty acid metabolism. Furthermore, in response to rehydration, the strategy of P. haitanensis to restart its normal life activities was to preferentially recovery the expression levels of proteins relating to photosynthesis and energy metabolisms. © 2016 The Authors


Zhai S.-W.,Jimei University | Zhai S.-W.,Key Laboratory of Healthy Mariculture for the East China Sea | Liu S.-L.,Jimei University | Liu S.-L.,Key Laboratory of Healthy Mariculture for the East China Sea | Chen X.-H.,Jimei University
Israeli Journal of Aquaculture - Bamidgeh | Year: 2015

This trial spanning 28 days, was conducted to investigate the effects of quercetin on alleviating dietary lead (Pb)-induced growth retardation and oxidative stress in juvenile tilapia (Oreochromis niloticus). Four hundred fish were randomly divided into four treatments with four replicates in each group, 25 fish in each replicate. The four treatments were: control treatment (fed with a basal diet), Pb treatment (fed with a basal diet+800 mg Pb/kg), Pb+Q1 treatment (fed with a basal diet+800 mg Pb/kg+800 mg quercetin/kg), and Pb+Q2 treatment (fed with a basal diet+800 mg Pb/kg+1600 mg quercetin/kg). Compared with the control treatment, final body weight, weight gain rate and feed conversion rate of Pb treatment were significantly affected (P<0.05). The significant differences in growth performances (except feed conversion rate of Pb+Q1 treatment) were found between Pb treatment and all quercetin supplementation treatments (P<0.05). There were no significant differences in growth performance between the control treatment, Pb+Q1 treatment and Pb+Q2 treatment (P>0.05). Survival rate of all treatments was similar (P>0.05). Malondialdehyde level, total antioxidation capacity level, and activity of superoxide dismutase, catalase and glutathione peroxidase in hepatopancreas of Pb treatment were significantly affected (P<0.05). No significant differences in malondialdehyde level and antioxidant potential parameters (except catalase in Pb+Q2 treatment) were found between the control treatment and all quercetin supplementation treatments (P>0.05).Results indicated that dietary quercetin supplementation could ameliorate the harmful effects of dietary Pb exposure on growth and effectively normalize antioxidant status in hepatopancreas of tilapia. © 2014, Israeli Journal of Aquaculture - Bamidgeh. All rights reserved.

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