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Effects of biogenic amines on the testicular development in mud crabs Scylla serrata

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Acta Oceanologica Sinica 2006年第2期25卷 119-124页

作者： YE Haihui HUANG Huiyang li shaojing WANG Guizhong li Qifu Oceanographic Department State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China Laboratory of Cell Biology School of Life Science Xiamen University Xiamen 361005 China

The regulation of three biogenic amines over the reproductive neuroendoerine activity of the male Scylla serrata was investigated by in vivo injection and in vitro incubation. The testicular index, the ratio of the mature sections in testes, and the ratio of Type B cells in androgenic gland were taken as the quantitative indexes. The in vivo injections indicated that： 5-HT can significantly promote the testicular development and the secretion of the androgenic gland in S. serrata; DA can inhibit the testicular development, but no influence on the secretion of the androgenic gland was found; no significant difference was observed between the OA-injected group and the concurrent control group. In vitro incubations showed that： 5-HT can stimulate the secretion of the brain and the thoracic ganglia, thus accelerating that of the androgenic gland; however, neither OA nor DA showed any significant influence on the secretion of the brain and the thoracic ganglionic mass. As to the optic ganglia, the three biogenic amines hardly have any effect on its secretion. It is the first time to report the regulation of biogenic amines over the reproductive neuroendocrine of male crustaceans through vitro experiments. Results corroborate that 5-HT activates the brain and the thoracic ganglia to secret GSH first, then promote the testicular development through the activity of the androgenic gland.

关键词： biogenic amines Scylla serrata neuroendocrine organs androgenic gland reproduction

Preliminary study of the retention mechanism of planktonic copepods in the Jiulong Estuary in China

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Acta Oceanologica Sinica 2007年第4期26卷 156-163页

作者： SHANG Xu WANG Guizhong li shaojing GUO Donghui Department of Oceanography State Key laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai 200062 China

The horizontal and vertical distribution patterns of five planktonic copepods, Calanus sinicus, Acartia pacifica, Tortanus derjugini, Acartiella sinensis and Pseudodiaptomus poplesia, predominant in the Jiulong Estuary, were investigated from May 2003 to April 2004. The results showed that the distribution of these copepods was related to the tidal period but that each species had its own specific pattern. C. sinicus showed no tidal vertical migration behavior and was thought to be a non-resident species in this estuary. Among Acartia pacifica, T. derjugini,Acartiella sinensis, more individuals occurred in the surface than in the bottom waters during flood tide, and the pattern was reversed during ebb tide. The epibenthic copepod P. poplesia usually remained in the bottom waters in the upstream part of the estuary, but it displayed strong tidally-oriented vertical migration in the middle reaches of the estuary. Taking into account the hydrographic characteristics of the Jiulong Estuary, it was hypothesized that the planktonic copepods in this estuary had more or less adopted the mechanism of vertically migrating to the surface waters during flood tide in order to make use of the inflowing tide, and then sinking to the bottom during ebb tide to avoid being carried out of the estuary by net outflow.

关键词： estuary copepod retention mechanism tidal vertical migration

Genetic diversity and differentiation of three populations of Penaeus monodon Fabricus

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Acta Oceanologica Sinica 2008年第1期27卷 113-121页

作者： WANG Guizhong TAN Shuhua li shaojing YE Haihui Department of Oceanography Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Genetic diversity of two wild Penaeus monodon populations sampled from the coastal waters of Qinglan （ Hainan Province of China, HN） and Malaysia （KD）, and the F1 generation of a Thailand broodstock population （CP） were examined by vertical polyacrylamide gel electrophoresis. Of 21 loci encoded by ten enzymes, 11 were polymorphic. The mean proportions of polymorphic loci of HN, KD and CP were 36. 36%, 45.45% and 50.00% , with the average heterozygosities of 0.135, 0.181 and 0.191, and the effective numbers of alleles per loci were 1. 300, 1. 330 and 1. 329, respectively. The divergent indexes of HN, KD and CP were0.023, 0.124, and 0.117, respectively. The genetic distance between the two wild populations was 0.005, and the gene differentiation coefficient was also very low （0.014）. The results indicated that the F1 generation population had a higher genetic diversity than the two wild populations, and that the HN population had the lowest one. There was no significant differentiation between HN and KD populations and all populations existed with a slight heterozygote excess.

关键词： Penaeus monodon isozyme genetic structure genetic differentiation

Response of antioxidant defense system in copepod Calanus sinicus Brodsky exposed to CO_2-acidified seawater

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Acta Oceanologica Sinica 2016年第8期35卷 82-88页

作者： ZHANG Dajuan GUO Donghui WANG Guizhong li shaojing Key Laboratory for Aquatic Ecology and Aquaculture of Tianjin College of Fisheries Tianjin Agricultural University College of Ocean and Earth Science Xiamen University

Marine zooplankton responds sensitively to elevated seawater CO_2 concentration. However, the underlying physiological mechanisms have not been studied well. We therefore investigated the effects of elevated CO_2concentration（0.08%, 0.20%, 0.50% and 1.00%） on antioxidant defense components, as well as two detoxification enzymes of Calanus sinicus（copepod）. The results showed that glutathione peroxidase（GPx） activity exposed to CO_2-acidified seawater was significantly stimulated while other antioxidant components, including glutathione-Stransferase（GST） activity, superoxide dismutase（SOD） activity decreased significantly with reduced glutathione（GSH） level and GSH/oxidized glutathione（GSSG） value. CO_2-acidified seawater exhibited stimulatory effects on adenosine triphosphatase（ATPase） activity and acetylcholinesterase（Ach E） activity was inhibited. Moreover, the results of principal component analysis indicated that 75.93% of the overall variance was explained by the first two principal components. The elevated CO_2 concentration may affect the metabolism and survivals of copepods through impacts these enzymes activities. Further studies are needed to focus on the synergistic effects of elevated CO_2 concentration and other environmental factors on copepods.

关键词： acidified seawater carbon dioxide Calanus sinicus antioxidant defense system

Settlement and metamorphosis of Styela canopus Savigny larvae in response to some neurotransmitters and thyroxin

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Acta Oceanologica Sinica 2006年第3期25卷 90-97页

作者： FENG Danqing HUANG Ying KE Caihuan ZHOU Shiqiang li shaojing Key State Laboratory of Marine Environmental Science Xiamen University Xiaman 361005 China Department of Oceanography Xiamen University Xiamen 361005 China Institute of Subtropic Oceanography Xiamen University Xiamen 361005 China

The larvae of ascidian Styela canopus Savigny were treated with epinephrine, norepinephrine, L-DOPA, GABA and thyroxin to test the ability of these compounds to induce or inhibit larval settlement and metamorphosis. The results showed that epinephrine, norepinephrine and L-DOPA at the concentration of 1 μmol/dm^3 induced larval settlement and metamorphosis in S. canopus, with short exposure （ 1 h） to 1 μmol/dm^3 of L-DOPA inducing rapid settlement. In contrast, GABA at the concentrations of 0.1 ～1130.0 μmol/dm^3 significantly inhibited the settlement and metamorphosis of S. canopus larvae. In addition, thyroxin at 1 -50 μg/dm^3 had no effect on larval settlement and metamorphosis in S. canopus. These results suggest the importance of neurotransmitters in the settlement and metamorphosis of S. canopus larvae.

关键词： Styela canopus larvae settlement metamorphosis neurotransmitter thyroxin

Phytoneuston in the southern Taiwan Strait

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Acta Oceanologica Sinica 2000年第4期19卷 137-144页

作者： Huang Jiaqi li shaojing Yu Yao Department of Oceanography Xiamen UniversityXiamen 361005China

In June and November 1988 Samples were collected by the improved improved Manta neuston net at 18 stations in the southern Taiwan Strait. One hundred and two species and variations of phytoneuston are identified. Total individuals of phytoneuston in June are more than those in November. The horizontal distribution of phytoneuston is that the dense area occurs in the southern Taiwan Bank in June, while it appears in the western Taiwan Bank in November. The diel variations of phytoneuston are very obvious. The maximum abundance of phytoneuston occurs in the afternoon (16: 00), and the minimum at midnight which is opposite to zooneuston. The relationships between phytoneuston and environment, and between phytoneuston and zooneuston are also discussed.

关键词： Phytoneuston Taiwan Strait?

Immunocytological evidence for the presence of vertebrate FSH and LH-like substances in the brain and thoracic ganglion of the swimming crab,Portunus trituberculatus

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Progress in Natural Science:Materials International 2008年第11期18卷 1453-1457页

作者： Huiyang Huang Haihui Ye shaojing li Guizhong Wang Department of Oceanography,Xiamen University,Xiamen 361005,China Department of Oceanography Xiamen University Xiamen 361005 China

Investigating the distribution of follicle stimulating hormone(FSH)and luteinizing hormone(LH)in the swimming crab, Portunus trituberculatus,helps in the understanding of its reproductive regulation *** study has detected the location of vertebrate FSH-and LH-like substances in the brain and the thoracic ganglion mass with immunocytochemical *** immunoreaction is very weak or negative during the immature period and the post-spawning period,while it is stronger in the mature *** of FSH-like immunoreactive cells resembles that of LH-like *** immunoreactive cells were observed chiefly in the anterior median cell-cluster of the protocerebrum with stronger *** were only a few in the inboard cell-cluster of the olfactory lobe of the deutocerebrum and the posterior cell-cluster of the *** cells were located in all the three ganglia in the thoracic ganglion *** results indicated that substances resembling the vertebrate FSH and LH exist in ***,and their expression has some correlation with the developmental stage of ovaries,thus they might engage in the ovary development and ovulation.

关键词： Follicle stimulating hormone(FSH) Luteinizing hormone(LH) Portunus trituberculatus Brain Thoracic ganglion mass Immunocytochemistry

Immunorecognition of estrogen and androgen receptors in the brain and thoracic ganglion mass of mud crab,Scylla paramamosain

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Progress in Natural Science:Materials International 2008年第6期18卷 691-695页

作者： Haihui Ye*,Huiyang Huang,shaojing li,Guizhong Wang Department of Oceanography,Xiamen University,Xiamen 361005,China Department of Oceanography Xiamen University Xiamen 361005 China

The brain and the thoracic ganglion of a crustacean can synthesize and secrete gonad-stimulating hormone(GSH)which stimulates the maturation of *** the previous experiments,sex steroid hormones(estradiol,testosterone,progesterone,etc.)have been detected from the ***,the feedback regulation of sex steroid hormones on the brain and the thoracic ganglion of the crustacean has not been reported so *** the present experiment,monoclonal antibodies were applied to investigate the immuno-recognition of estrogen receptor(ER)and androgen receptor(AR)in the brain and the thoracic ganglion mass of Scylla *** results showed that the distribution of the immunopositive substances of ER and AR was extremely *** distributed in the protocerebrum,deutocerebrum and tritocerebrum of the brain,and mainly in *** the thoracic ganglion mass,immuno-positive substances distributed in the subesophageal ganglion,thoracic ganglion and abdominal ganglion,and mostly in subesophageal *** substances of ER and AR mostly existed in the cytoplasm of *** present study will provide mor-phological evidence for the origin and the evolution of ER and *** addition,the immunoreactivities of ER and AR suggested that the estrogen and androgen may be involved in the feedback regulation of crustacean neuroendocrine.

关键词： Scylla paramamosain Estrogen receptor Androgen receptor Brain Thoracic ganglion mass Immunocytochemistry

Aequorea taiwanensis n. sp. (Hydrozoa,Leptomedusae) and mtCOI sequence analysis for the genus Aequorea

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Acta Oceanologica Sinica 2009年第1期28卷 109-115页

作者： ZHENG lianming liN Yuanshao li shaojing CAO Wenqing XU Zhenzu HUANG Jiaqi Department of Oceanography Xiamen University Xiamen 361005 China

Nine species of Prionospio complex are recorded from China＇s waters,including one new species and six newly recorded ***（Prionospio） pacifica ***.,is characterized by having first and forth pairs of branchiae pinnate,second and third pairs of apinnate,ventral crest on Setiger 9 and dorsal crests on Setigers *** kirrae（Wilson,1990）,Prionospio（Aquilaspio） convexa Imajima,1990,Prionospio（Minuspio） multibranchiata Berkeley,1927,Prionospio（Prionospio） bocki Sderstrm,1920,Prionospio（Prionospio） dubia Maciolek,1985 and Prionospio（Prionospio） paradisea Imajima,1990 are recorded for the first time from China＇s waters.

关键词： Aequorea new species Aequorea taiwanensis n. sp. mtCOI sequence analysis