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Digital Identification of Ecosystem Structure in the FIrtIna Valley of the Kakar Mountains in the Rize City of Turkey

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Journal of Mountain science 2014年第2期11卷 421-428页

作者： Cagasan KARACAOGLU Selim Sualp CAGLAR Department of biology Faculty of Science Biology Department Ecology Section EBAL Laboratories Hacettepe University

Identifying the structure of protected mountain ecosystems is an important task for understanding conservation sustainability. The study area, the Firtina Valley, located in the Rize City on the Eastern Blacksea Coast, is one of the biological hotspots and a National Park of Turkey. In order to identify the structure of mountain ecosystems, we generated a GIS database for the main environmental parameters of the study area, including elevation,slope and aspect layers for topographic structure, 10year mean values of Normalized Difference Vegetation Index(NDVI), data for vegetation structure, annual mean temperature and precipitation layers for climatic structure, main soil groups for soil structure and stream flow accumulation, stream flow length and stream order layers for hydrological *** identify the complex relations among environmental factors in the study area a data reduction method is applied with Principal Component Analysis(PCA). PCA is performed using data of 16 layers from Geographical Information Systems(GIS). PCA analysis reduced 16 dimensions into 5 dimensions containing 75% of the variation in all data. It is also revealed that the topographic structure, mainly altitude, dominates the ecosystems of the Firtina Valley, but it should be considered that the interactions of environmental factors in an ecosystem dynamics are very complex. The ecosystem structure is determined by the environmental factors direct or indirect effects on energy regulation of an ecosystem. Therefore the relationship between topographic elements and other abiotic-biotic elements in the Firtina Valley are important for environmental assessment and sustainability of a protected area, and these effects are explained in this study.

关键词： PCA GIS Firtina Valley Ecosystem structure Protected areas

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Morphological variation and distribution of free neuromasts during half-smooth tongue sole Cynoglossus semilaevis ontogeny

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Chinese Journal of Oceanology and Limnology 2017年第2期35卷 244-250页

作者：马爱军商晓梅周洲王新安孙志宾崔文晓夏丹丹马本贺 Yellow Sea fisheries Research Institute Chinese Academy of Fishery Sciences Key Laboratory of Sustainable Development of marine fisheries Ministry of Agriculture Qingdao Key Laboratory for marine fish Breeding and Biotechnology Laboratory for marine biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology Shanghai Ocean University College of Fisheries and Life Science

This study was conducted to clarify the distribution and morphology of free neuromasts during the development of half-smooth tongue sole （Cynoglossus semilaevis） using scanning electron microscopy. During development, （1） the apical surface of free neuromasts changed in shape from a circle to a four-poiut star; （2） the external structure changed from being level with the epidermis to papilla-like above the level of the epidermis; （3） the neuromast cupula changed from cylindrical to blade-shaped; （4） the free neuromasts went from occurring singly to being in clusters of a few single organs; （5） the arrangement changed from a linear array to no discernable pattern; （6） there was a significant increase in the number of free neuromasts after metamorphosis. In adult C. semilaevis, free neuromasts were only observed on the abocular side of the head. Thus, there were more free neuromasts located on the abocular side of the head with a higher concentration around the anterior nostril and mouth, which may have a mechanical sensory function to help locate food as an adaptation to a benthic mode of life.

关键词： morphology structure cupula metamorphosis scanning electron microscopy (SEM)

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Taxonomic Study on the Feather Stars (Crinoidea: Echinodermata) from Egyptian Red Sea Coasts and Suez Canal, Egypt

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Open Journal of marine science 2012年第2期2卷 51-57页

作者： Ahmed M. Hellal marine biology and fish science section Zoology Department Faculty of Science Al-Azhar University Cairo Egypt

A taxonomic study on the crinoids (feather stars) collected from 34 sites from the Red Sea coasts and islands as well as the Suez Canal was done during the period from 1992 to 2003. A total of 15 species are now known from the Red Sea belonging to eleven genera under six families. Among them four species are endemic to the Red Sea and the two spe- cies, Decametra chadwicki and Lamprometra klunzingeri, are recorded from the Suez Canal for the first time. Also, the two species, Oligometra serripinna and Dorometra aegyptica, are new record from Gulf of Suez, and Decametra mollis from Gulf of Aqaba and Northern Red Sea. This study represents the first proper documentation of crinoid species in the study area. Summaries are provided of the specific habitats and geographical distribution.

关键词： Crinoidea Red Sea Suez Canal Taxonomy Habitats Geographical Distribution

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Characterization of H3 methylation in regulating oocyte development in cyprinid fish

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science China(Life sciences) 2019年第6期62卷 829-837页

作者： Rong Zhou Rujie Shang Dingbin Gong Xiujuan Xu Shaojun Liu State Key Laboratory of Developmental biology of Freshwater fish College of Life Science Hunan Normal University

Histone post-modifications are important epigenetic markers involved in multiple cellular processes via regulation of gene transcription or remodeling of chromatin structure. Oocyte development is a critical process under rigorous control to prevent the generation of aberrant gametes. However, the regulatory mechanism of oocyte early development is not well-understood due to the tiny size and poor distinguishability of the gonad in juvenile stages. Here, two cyprinid hybrid fishes, a sterile allotriploid fish and a gynogenetic hybrid fish with delayed oocyte development, provided research models to investigate the mechanisms involved. We used cytogenetic and molecular methods to confirm the pachytene arrest of oocytes in allotriploid fish and gynogenetic hybrid fish. On the basis of these developmental differences, we screened 21 different histone H3 modifications by ELISA and found that four modifications(H3 K4 me3, H3 K9 me3, H3 K79 me, and H3 K79 me3) differed significantly in the two cyprinid hybrid fishes. Changes in histone methylation at the three residues(H3 K4, K9, K79) were caused by specific methyltransferases and demethylases. Our results provide new insights into the epigenetic regulation of oocyte early development in fish, a process critical for understanding of reproductive biology and with practical applications in the aquacultural breeding industry.

关键词： histone methylation oocyte development sterility allotriploid fish

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Establishment and characterization of a testicular Sertoli cell line from olive flounder Paralichthys olivaceus

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Chinese Journal of Oceanology and Limnology 2016年第5期34卷 1054-1063页

作者：彭丽敏郑媛尤锋吴志昊邹玉霞张培军 Key Laboratory of Experimental marine biology Institute of OceanologyChinese Academy of Sciences Laboratory for marine biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology University of Chinese Academy of sciences

The culture of Sertoli cells has become an indispensable resource in studying spermatogenesis.A new Sertoli cell line(POSC) that consisted predominantly of fibroblast-like cells was derived from the testis of the olive flounder Paralichthys olivaceus and sub-cultured for 48 *** of the mtDNA COI gene partial sequence confirmed that the cell line was from *** were optimally maintained at 25℃ in DMEM/F12 medium supplemented with fetal bovine serum,basic fibroblast growth factor,and epidermal growth *** growth curve of POSC showed a typical "S" *** analysis revealed that the cell line possessed the normal *** diploid karyotype of 2n=*** expressed dmrt1 but not vasa,which was detected using RT-PCR and *** revealed that the cells exhibited the testicular Sertoli cell marker ***,POSC appeared to consist of testicular Sertoli *** fluorescent signals were observed after the cells were transfected with pEGFP-N3 plasmid,with the transfection efficiency reaching 10%.This research not only offers an ideal model for further gene expression and regulation studies on ***,but also serves as valuable material in studying fish spermatogenesis,Sertoli cell-germ cell interactions,and the mechanism of growth and development of testis.

关键词： olive flounder Paralichthys olivaceus testis Sertoli cell chromosome FasL transfection

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Isolation, characterization and expression analysis of TRPV4 in half-smooth tongue sole Cynoglossus semilaevis

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Journal of Oceanology and Limnology 2020年第1期38卷 294-305页

作者： SHANG Xiaomei MA Aijun WANG Xin’an XIA Dandan ZHUANG Jiao Yellow Sea fisheries Research Institute Chinese Academy of Fishery SciencesShandong Key Laboratory of Marine Fisheries Biotechnology and Genetic BreedingQingdao Key Laboratory for Marine Fish Breeding and BiotechnologyQingdao 266071China Laboratory for marine biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of marine and Environmental sciences Tianjin University of Science and TechnologyTianjin 300457China

The transient receptor potential vanilloid 4(TRPV4),another Ca^2+entry channel,belongs to the vanilloid subfamily and responds to a number of different physical and chemical stimuli and exists widely in ***,our understanding of the TRPV4 in fish remains ***,we studied the TRPV4 gene from Cynoglossus semilaevis,named CsTRPV4 that encodes a putative protein of 870 amino acids common in structure and characteristic of mammalian TRPV4,including the domains of ANK repeats,six TM,TRP domain,and *** CsTRPV4 was expressed ubiquitously in examined tissues:higher expression in the heart,spleen,testis,and eye,but lower expression in kidney and ***,the expression of CsTRPV4 in lateral line was significantly higher than in many other tissues as the CsTRPV4 was expressed significantly in the free *** addition,CsTRPV4 in the free neuromast from the larval fish was significantly expressed in the hair cells of the free ***,the free neuromasts can act as a mechano-sensor to the mechanical stimulation in molecular level in ***,which lays a foundation for further study of the functions of the free neuromasts.

关键词： transient receptor potential vanilloid 4 (TRPV4) Cynoglossus semilaevis gene expression free neuromasts in situ hybridization

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Seasonal variation of Caligus rotundigenitalis infestation on the host fish Etroplus suratensis from the Cochin Backwaters,southwest coast of India

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Acta Oceanologica Sinica 2022年第6期41卷 132-136页

作者： Jemi Job N A A Mohamed Hatha C K Radhakrishnan Department of marine biology Microbiology and BiochemistrySchool of Marine SciencesCochin University of Science and TechnologyCochin 682016India

Investigation of four edible fishes(Etroplus suratensis,Oreochromis mossambicus,Lates calcarifer,Chanos chanos)collected from a fish landing center along Cochin Backwaters has done for caligid *** these,caligids were detected only from Etroplus suratensis and was identified to be Caligus *** were attached to the inner side of operculum of host which indicates strong site *** annual observation of prevalence,mean intensity and abundance were found to be 19.21%,1.051 and 0.202 *** of prevalence with respect to the different length groups of *** has discussed in this *** of the inner side of operculum and increase in mucous production were noticed as a result of copepod attachment.

关键词： Caligidae Caligus rotundigenitalis copepod crustacean parasites Etroplus suratensis

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Changes of melatonin and its receptors in synchronizing turbot(Scophthalmus maximus)seasonal reproduction and maturation rhythm

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Acta Oceanologica Sinica 2022年第1期41卷 84-98页

作者： Chunyan Zhao Shihong Xu Yifan Liu Chengcheng Feng Yongshuang Xiao Yanfeng Wang Qinghua Liu Jun Li School of marine science and Engineering Qingdao Agricultural UniversityQingdao 266109China Key Laboratory of Experimental marine biology Centre for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Southern marine science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China marine biology and Biotechnology Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

In most fish,reproduction is seasonal or periodic under the suitable *** turbot(Scophthalmus maximus)farms,one of the most economically important marine flatfish species,changes in daylength could cause changes in the spawning *** this study,to characterize the regulation of reproductive physiology following light signals,three melatonin receptors(Mtnr)investigated in turbot were named sm Mtnr1,sm Mtnr2,and sm Mtnr1 *** expression profiles demonstrated that Mtnr m RNAs were concentrated in the brain(as detected in the hypothalamus(Hy)and mesencephalon(Me)),gonad and *** most abundant Mtnr1 and Mtnr2 m RNA expression levels were detected in the central nervous system at the beginning of the breeding season,suggesting that Mtnr1 and Mtnr2 may play vital roles in the regulation of turbot gonadal *** addition,the melatonin profiles gradually increased and reached to the highest level at the spawning stage,indicating that melatonin is a potent hormone in the regulation of fish oocyte growth and *** results of this study suggested that melatonin is the primary factor that transduces the light signal and regulates the physiological functions of turbot seasonal ***,the results of this study may establish a foundation for further research seeking to identify fish melatonin receptors involved in the gonadal development and gamete maturation.

关键词： turbot brain melatonin melatonin receptors seasonal reproductive development

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Effect of high light and desiccation on photosystem Ⅱ in the seedlings and mature plants of tropical seagrass Enhalus acoroides during low tide

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Journal of Oceanology and Limnology 2023年第1期41卷 241-250页

作者： Xingkai CHE Hu LI Litao ZHANG Jianguo LIU CAS and Shandong Key Laboratory of Experimental marine biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

During low tide,the intertidal seagrass Enhalus acoroides is often exposed to high light and desiccation,which can seriously threaten its survival,at least partly by inhibiting photosystem Ⅱ(PSⅡ)*** response of leaves of *** to high light and desiccation was compared for seedlings and mature *** show that the resistance of seedling and mature leaves to high light was quite similar,but to desiccation was very *** leaves were more sensitive to desiccation than the mature plant leaves,but had better water *** damage of desiccation to seedling leaves was mainly caused by dehydration,whereas that to mature plant leaves was caused by hypersaline *** recovery rate of PSⅡ of seedling leaves was significantly slower than that of the mature plants after the stresses disappeared,which may at least partly contribute to seedling mortality in the *** addition,compared to high light,desiccation seriously inhibited the recovery rate of PSⅡ activities even if the leaves became fully rehydrated to their normal relative water content(RWC)in the following *** inhibited the recovery rate of RC/CS_(M)(reaction center per cross section(at t=t_(Fm)))to decrease the production of assimilatory power,which maybe the cause of the slower PSⅡ recovery in desiccation *** study demonstrates that desiccation particularly coupling with high light have a very negative ef fect on the PSⅡ of *** during low tide and the sensitivity of seedlings and mature plants to desiccation is significantly different,which have important reference significance to choose an appropriate transplanting depth where seedlings and mature plants of *** not only receive sufficient light for growth,but also that minimize desiccation stress during low tide.

关键词： Enhalus acoroides high light desiccation photosystemⅡ

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Molecular evolution of Na^(+) channels in teleost fishes

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Integrative Zoology 2009年第1期4卷 64-74页

作者： Harold H.ZAKON Manda C.JOST Derrick J.ZWICKL Ying LU David M.HILLIS section of Neurobiology section of Integrative biology The University of TexasAustinTXUSA

Voltage-dependent sodium channels are critical for electrical *** possess a single sodium channel gene;two rounds of genome duplication early in vertebrates increased the number to *** the teleost-tetrapod split,independent gene duplications in each lineage have further increased the number of sodium channel genes to 10 in tetrapods and 8 in *** we review how the occurrence of multiple sodium channel paralogs has influenced the evolutionary history of three groups of fishes:pufferfish,gymnotiform and mor-myriform electric ***(tetraodontidae)produce a neurotoxin,tetrodotoxin,that binds to and blocks the pore of sodium *** evolved resistance to their own toxins by amino acid substitutions in the pore of their sodium *** substitutions had to occur in parallel across multiple paralogs for organismal re-sistance to *** and mormyriform fishes independently evolved electric organs to generate elec-tricity for communication and object *** sodium channel genes are expressed in muscle in most *** both groups of weakly electric fishes,one gene lost its expression in muscle and became compartmen-talized in the evolutionary novel electric organ,which is a muscle *** gene then evolved at elevated rates,whereas the gene that is still expressed in muscle does not show elevated rates of *** the electric organ-expressing gene,amino acid substitutions occur in parts of the channel involved in determining how long the channel will be open or *** enhanced rate of sequence evolution of this gene likely underlies the spe-cies-level variations in the electric signal.

关键词： electric fish molecular evolution pufferfish sodium channels tetrodotoxin.

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