Effect of moisture status on the stability of thermal gels from the body wall of sea cucumbers ( Apostichopus japonicus )

LWT ◽  
2016 ◽  
Vol 74 ◽  
pp. 294-302 ◽  
Author(s):  
Yan Zhang ◽  
Hu Hou ◽  
Yan Fan ◽  
Fangfang Zhang ◽  
Bafang Li ◽  
...  
Keyword(s):  
Body Wall ◽  
Apostichopus Japonicus ◽  
The Body ◽  
Sea Cucumbers ◽  
Effect Of Moisture ◽  
The Stability

Fatty acid component in sea cucumber Apostichopus japonicus from different tissues and habitats

2015 ◽  
Vol 96 (1) ◽  
pp. 197-204 ◽  
Author(s):  
Qinzeng Xu ◽  
Qiang Xu ◽  
Xuelei Zhang ◽  
Quancai Peng ◽  
Hongsheng Yang
Keyword(s):  
Organic Matter ◽  
Sea Cucumber ◽  
Body Wall ◽  
Apostichopus Japonicus ◽  
The Body ◽  
Food Sources ◽  
Sea Cucumbers ◽  
Protein Energy ◽  
Strong Current ◽  
Benthic Food

Fatty acids (FA) are a non-protein energy source and can act as trophic biomarkers in benthic food webs. We analysed the FA profiles of sea cucumber Apostichopus japonicus, comparing tissues of body wall, gut sediment and ovaries in two habitats. Rongcheng Bay: kelp raft cultivation area with high organic matter in sediment; Laoshan Bay: strong current with low sediment organic matter. The results showed that body wall and ovary tissues were rich in long chain polyunsaturated FA (LC-PUFA), which contributed ~31% to the FA dissimilarity between the two tissues. SIMPER (similarity percentages routine) results showed that C20:5ω3 (EPA), C18:1ω7, C20:4ω6 (AA), C16:0, C14:1 and C20:1ω11 contributed to dissimilarity between the body wall and ovary tissues, while 16:1ω7, 20:5ω3, C16:0, C18:1ω7, C18:0 and C14:1 contributed more to the dissimilarity of body wall tissues between the two habitats. FA biomarkers showed that sea cucumbers from the two habitats had different food sources, with brown kelp and vascular plants being the main food for sea cucumbers in Rongcheng and diatoms for those in Laoshan. To better understand differences in FA composition in sea cucumbers, more research is needed examining a wider diversity of tissue types and habitats.

scholarly journals Analysis of the gene transcription patterns and DNA methylation characteristics of triploid sea cucumbers (Apostichopus japonicus)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lingshu Han ◽  
Yi Sun ◽  
Yue Cao ◽  
Pingping Gao ◽  
Zijiao Quan ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Body Wall ◽  
Molecular Mechanisms ◽  
Apostichopus Japonicus ◽  
Economic Benefits ◽  
Methylation Pattern ◽  
The Body ◽  
Aquatic Animal ◽  
Sea Cucumbers ◽  
Differentially Methylated Genes

AbstractBreeding of polyploid aquatic animals is still an important approach and research hotspot for realizing the economic benefits afforded by the improvement of aquatic animal germplasm. To better understand the molecular mechanisms of the growth of triploid sea cucumbers, we performed gene expression and genome-wide comparisons of DNA methylation using the body wall tissue of triploid sea cucumbers using RNA-seq and MethylRAD-seq technologies. We clarified the expression pattern of triploid sea cucumbers and found no dosage effect. DEGs were significantly enriched in the pathways of nucleic acid and protein synthesis, cell growth, cell division, and other pathways. Moreover, we characterized the methylation pattern changes and found 615 differentially methylated genes at CCGG sites and 447 differentially methylated genes at CCWGG sites. Integrative analysis identified 23 genes (such as Guf1, SGT, Col5a1, HAL, HPS1, etc.) that exhibited correlations between promoter methylation and expression. Altered DNA methylation and expression of various genes suggested their roles and potential functional interactions in the growth of triploid sea cucumbers. Our data provide new insights into the epigenetic and transcriptomic alterations of the body wall tissue of triploid sea cucumbers and preliminarily elucidate the molecular mechanism of their growth, which is of great significance for the breeding of fine varieties of sea cucumbers.

Effectiveness of two tagging devices in the sea cucumber Holothuria (Halodeima) grisea

2017 ◽  
Vol 68 (3) ◽  
pp. 563
Author(s):  
Ruber Rodríguez-Barreras ◽  
Julián López-Morell ◽  
Alberto M. Sabat
Keyword(s):  
Sea Cucumber ◽  
Body Wall ◽  
The Body ◽  
Short Term ◽  
Pit Tag ◽  
Sea Cucumbers ◽  
Pit Tags ◽  
Significant Difference ◽  
Long Term Studies

A reliable and harmless mark–recapture method provides valuable information for the management of commercial sea cucumber species. Nevertheless, marking and tracking sea cucumbers is notoriously difficult and represents a serious challenge. In this study, we tested one external and one internal tag in the sea cucumber Holothuria grisea. A passive integrated transponder (PIT) tag was inserted into the coelomic cavity in one treatment, whereas a T-bar (external tag) was attached in the upper surface of the body wall in the other treatment; sea cucumbers were then followed for 17 weeks. The tagging procedure caused no evisceration in the experimental groups, nor was a significant difference in growth rate found between treatments. The retention of the PIT tag was low, with 100% lost by Week 9. Retention of T-bars was higher, with 90% still attached by the end of the Week 8, but retention decreased thereafter as T-bar absorption increased. No relationship was found between initial weight and the number of weeks PIT tags (r=–0.173, P=0.781) or T-bars (r=–0.220, P=0.652) were retained. Neither the T-bar nor the PIT tags fulfilled the requirements of high retention required for long-term studies. However, we do recommend the use of T-bars for short-term studies for H. grisea under laboratory conditions or in a habitat with low substrate complexity.

scholarly journals Effects of heat treatment on the gel properties of the body wall of sea cucumber (Apostichopus japonicus)

2017 ◽  
Vol 54 (3) ◽  
pp. 707-717 ◽  
Author(s):  
Kai Zhang ◽  
Hu Hou ◽  
Lin Bu ◽  
Bafang Li ◽  
Changhu Xue ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Sea Cucumber ◽  
Body Wall ◽  
Apostichopus Japonicus ◽  
The Body ◽  
Gel Properties

scholarly journals Effects of chronic dietary hexavalent chromium on bioaccumulation and immune responses in the sea cucumber Apostichopus japonicus

2021 ◽  
Author(s):  
Qixia Chan ◽  
Fuqiang Wang ◽  
Lidong Shi ◽  
Xue Ren ◽  
Tongjun Ren ◽  
...  
Keyword(s):  
Immune Responses ◽  
Hexavalent Chromium ◽  
Sea Cucumber ◽  
Body Wall ◽  
Apostichopus Japonicus ◽  
Hydrolytic Enzymes ◽  
Dry Weight ◽  
Control Group ◽  
Sea Cucumbers ◽  
Wet Weight

ABSTRACTSea cucumbers Apostichopus japonicus (3.54 ± 0.01 g of wet weight) were exposed to five concentrations of dietary hexavalent chromium [0 (control), 100, 200, 400, and 800 mg Cr6+/kg dry weight] amended with K2Cr2O7 for 30 days. The bioaccumulation and immune responses [antioxidant enzymes: superoxide dismutase (SOD) and catalase (CAT); hydrolytic enzymes: acid phosphatase (ACP) and alkaline phosphatase (AKP)] of sea cucumbers were subsequently evaluated. This study found that the order of Cr accumulation in the experimental tissues was respiratory tree > intestine > body wall. Significantly lower SOD activities occurred in the 400 mg/kg group compared to that in the control group. Higher dietary Cr6+ exposure (400 and 800 mg Cr6+ /kg dry weight) did not negatively alter the CAT activities, but significantly inhibited CAT activities in 100 mg/kg group, compared to control group. ACP activities in groups 200, 400 and 800 mg/kg were significantly lower than those in control group, while no significant differences occurred in AKP activities among groups. The present study provides important information into the bioaccumulation and immune responses of the sea cucumber A. japonicus in response to chronic dietary Cr6+ exposure.

STABILITY PERFORMANCE OF INFLATABLE TUBE IMITATING CLANIS BILINEATA LARVA UNDER AXIAL PRESSURE

2017 ◽  
Vol 17 (07) ◽  
pp. 1740028
Author(s):  
DONGHUI CHEN ◽  
JIANHUA LV ◽  
WEI LIU ◽  
ZHIYONG CHANG ◽  
XIAO YANG
Keyword(s):  
Body Wall ◽  
Ultimate Load ◽  
Limit Load ◽  
Strong Stability ◽  
The Body ◽  
Wall Structure ◽  
Axial Pressure ◽  
Stability Performance ◽  
Reinforcing Ribs ◽  
The Stability

The body wall structure of Clanis bilineata larva exhibits strong stability. This characteristic prompted the development of a new inflatable tube to improve the stability under axial pressure. The C. bilineata larva was chosen to observe the connection between its body wall and nearby muscle tissues, as well as the distribution of these tissues, by using the tissue section technique. Using this method, an inflatable tube with reinforcing ribs was designed. Simulation using the finite element method and experimentation were employed to compare and analyze the stability of the inflatable tube with and without reinforcing ribs under different axial pressure levels. Results indicate that the ultimate load of both inflatable tubes increases linearly with increasing pressure. The difference between the slopes of the two lines is small. Under different axial pressure levels, the ultimate load of the inflatable tube with reinforcing ribs is about 1.34[Formula: see text]N higher than that without reinforcing ribs; the ultimate compression power increased by 31% to 68% compared with that without ribs. The simulation results are slightly larger than the experimental results, but the ultimate load value in the simulation exhibits the same trend as that in the experiment. Finally, the limit load and ultimate compression power are used as evaluation criteria to quantitatively analyze the stability performance of an inflatable tube with reinforcing ribs under axial pressure.

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