检索结果-南通市图书馆

Stable isotopes in aquatic food web of an artificial lagoon in the Hangzhou Bay,China

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2010年第3期28卷 489-497页

作者：全为民施利燕陈亚瞿 Key and Open Laboratory of Marine and Estuarine fishery Resources and Ecology Ministry of Agriculture East China Sea Fishery Research Institute Chinese Academy of Fishery Science

Stable isotope values, δ13C and δ15N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean δ13C values for the 19 consumers ranged from -22.99‰ to -14.24‰. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate δ13C values between those of epibenthic microalgae and particulate organic matter (POM). The results of a multiple source linear mixing model (IsoSource model) indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean δ15N values for the 19 consumers varied between 4.93‰ and 12.97‰ and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds (detritivores/suspension feeders, omnivores and carnivores).

关键词： isotope ^13C ^15N lsoSource model trophic level food web

Spatial and temporal distributions of nitrogen,phosphorus and heavy metals in the intertidal sediment of the Chang jiang River Estuary in China

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2010年第1期29卷 108-115页

作者： QUAN Weimin SHI Liyan HAN Jindi PING Xianyin SHEN Anglv CHEN Yaqu Key and Open Laboratory of Marine and Estuarine fishery of Ministry of agriculture East China Sea Fishery Research Institute Chinese Academy of Fishery Science Shanghai 200090 China

Spatial and temporal distributions of nutrients （N and P） and heavy metals （Cu, Zn, Pb and Cd） in the intertidal sediments at Dongtan wetland of the Changjiang River （Yangtze River） Estuary were examined by laying one transect running seaward to landward during January, April, June, August and October of 2005. Total nitrogen （TN） and heavy metal concentrations in the intertidal sediment showed an increasing trend from open bare flat to the high marsh, with the maximum concentrations in the high marsh and the minimum values in open bare flat. In contrast, sediment total phosphorus （TP） concentrations changed little among sampling sites. One-way ANOVA found that there were significantly temporal variations of nutrients and heavy metals concentrations in the intertidal sediment （P 〈0.05）. The concentrations of heavy metals generally showed an increasing trend from January to October. As compared with other large estuaries, heavy metal contamination in the intertidal sediment of the Changjiang River Estuary was relatively low.

关键词： heavy metals nutrients intertidal Changjiang River Estuary contamination

Molecular Characterization and Expression Analysis of Matrix Metalloproteinase 3 in the Asian Yellow Pond Turtle Mauremys mutica

在线全文

学校读者我要写书评

暂无评论

Asian Herpetological research 2014年第1期5卷 38-48页

作者： Mi ZHAO Yan SHI Jian ZHAO Xinping ZHU Kunci CHEN Debo PAN Chengqing WEI Key Laboratory of Tropical and Subtropical fishery Resource Application and Cultivation Ministry of AgriculturePearl River Fishery Research Institute Chinese Academic of Fishery Science

Matrix metallopeptidase 3 is a zinc-containing proteinase that participates in tissue remodeling and immune responses. In this study, a cDNA encoding matrix metallopeptidase 3 was isolated and characterized from the Asian yellow pond turtle Mauremys mutica（designated as MaMMP3）. The MaMMP3 cDNA is 1805 bp and consists of a 5＇-untranslated region（UTR） of 56 bp, a 3＇-UTR of 243 bp, and an open reading frame（ORF） of 1506 bp encoding 481 amino acids. Homology analysis of MaMMP3 revealed that the MaMMP3 shared 25%–63% similarity to other known MMP3 sequences. The genomic sequence covers 6007 bp. Comparative analysis of the cDNA sequence revealed that the Asian yellow pond turtle MMP3 has eight exons and seven introns. The phylogenetic tree showed that the MaMMP3 is closely related to Gallus gallus MMP3 and Taeniopygia guttata MMP3. The mRNA expression of the MaMMP3 in normal group without any bacterial challenge could be detected in all studied tissues including kidney, heart, live and spleen, with the highest level in the spleen. The results of immune challenge showed that the expression level of MaMMP3 was up-regulated in the spleen and liver. These results provided an important information for studying the roles of Asian yellow pond turtle MMP3 in immunity further.

关键词： Asian yellow pond turtle Mauremys mutica Serratia marcescens Matrix metallopeptidase 3 Immune responses

Optimal salinity for dominant copepods in the East China Sea, determined using a yield density model

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2011年第3期29卷 514-523页

作者：徐兆礼高倩 Key and Open Laboratory of Marine and Estuarine fishery Ministry of Agriculture East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences

From 1997 to 2000, four field surveys were conducted in the East China Sea （ECS）（23°30＇-33°00＇N, 118°30＇-128°00＇E）. A field data yield density model was used to determine the optimal salinities for 19 dominant copepod species to establish the relationship between surface salinities and abundance of those species. In addition, ecological groups of the copepods were classified based on optimal salinity and geographical distribution. The results indicate that the yield density model is suitable for determining the relationship between salinity and abundance. Cosmocalanus darwini, Euchaeta rimana, Pleuromamma gracilis, Rhincalanus cornutus, Scolecithrix danae and Pareucalanus attenuatus were determined as oceanic species, with optimal salinities of 〉34.0. They were stenohaline and mainly distributed in waters influenced by the Kuroshio or Taiwan warm current. Temora discaudata, T. stylifera and Canthocalanus pauper were nearshore species with optimal salinities of 〈33.0 and most abundant in coastal waters. The remaining 10 species, including Undinula vulgaris and Subeucalanus suberassus, were offshore species, with optimal salinity ranging from 33.0-34.0. They were widely distributed in nearshore, offshore and oceanic waters but mainly in the mixed water of the ECS.

关键词： East China Sea optimal salinity pelagic copepods yield density model zooplankton

Application of a catch-based method for stock assessment of three important fisheries in the East China Sea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2018年第2期37卷 102-109页

作者： ZHANG Kui ZHANG Jun XU Youwei SUN Mingshuai CHEN Zuozhi YUAN Meng South China Sea Fisheries research Institute Chinese Academy of Fishery Sciences Key Laboratory of Open-Sea fishery Development Ministry of Agriculture

Most fisheries in China do not have maximum sustainable yield（MSY） estimates due to limited and poor ***, finding a common method to estimate MSY or total allowable catch（TAC） for fishery management is necessary. MSYs of three important fisheries in the East China Sea were evaluated through a catch-based *** for intrinsic rate of increase（r） and five levels of process error were considered. Results showed hairtail Trichiurus japonicas（Temminck and Schlegel） and small yellow croaker Larimichthys polyactis（Bleeker） fisheries experienced overfishing from the mid-1990 s to the early 2000 s, and the suggested TACs were 55.8×10^4 t and9.06×10^4 t, respectively. Decades of overfishing in wintering and spawning grounds of large yellow croaker Larimichthys crocea（Richardson） caused the fishery＇s collapse in the 1980 s, and it has not recovered until *** Catch–MSY model generated similar estimated MSYs with other methods and may be a useful choice for the assessment of regional stocks in China.

关键词： Catch-MSY model fisheries in the East China Sea intrinsic rate of increase maximum sustainable yield overfishing

Identification and profiling of microRNAs of Euphausia superba using Illumina deep sequencing

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2018年第6期36卷 2278-2287页

作者： SONG Wei ZHU Yefei WANG Lumin JIANG Keji ZHANG Fengying MA Chunyan MA Lingbo Key Laboratory of Oceanic and Polar Fisheries Ministry of AgricultureEast China Sea Fisheries Research InstituteChinese Academy of Fishery Sciences Key Laboratory of East China Sea fishery Resources Exploitation Ministry of AgricultureEast China Sea Fisheries Research InstituteChinese Academy of Fishery Sciences

MicroRNAs(miRNAs) are an abundant class of conserved, non-coding small RNAs that play important role in gene regulation at post translational level. There have been no reports on the miRNAs of the Antarctic krill E uphausia superba despite the species' crucial position in Antarctic food webs. Two small RNA libraries were constructed from eyestalk and muscle, subsequently, and deep sequencing analysis was performed to investigate and profile E. superba miRNAs. A total of 19 304 586 and 23 005 104 unique sequences were obtained from the eyestalk and muscle, respectively. After compared the small RNA sequences with the Rfam database, 12 342 039 and 7 907 477 reads in eyestalk and muscle were matched to the transcriptome sequence of E. superba. A total of 236 distinct miRNAs were identified after annotation to known animal miRNAs registered in miRBase 21. In both libraries, the most abundant known miRNA were miR-750 with 92 583 reads in muscle and miR-1304-3 p with 56 386 reads in eyestalk while the average value was less than 106, revealing a wide range of different expression levels. In addition, miR-277 a enriched in both libraries and may be involved in modulating Krebs cycle by targeting to Vimar. Differential expression analysis showed that 56 mature miRNAs were significantly up/down regulated according to expression fold change. It appeared that the expression of several abundant miRNAs maybe tissue-specific or tissue-bias. Notably, the expression pattern of miR-750 and miR-1 family, which was suggested as the crucial candidates, involved in muscle development. Taken together, this study provides the first miRNA profile of E. superba and some of these miRNAs were expected to play important role in immune response, reproduction, energy metabolism, and muscle development and so on. Thus, the results provides a reference for functional studies of miRNAs in E. superba.

关键词： microRNA Antarctic krill Illumina deep-sequencing eyestalk muscle

Feeding habits and ontogenetic diet shifts of Bombay duck, Harpadon nehereus

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2014年第3期32卷 542-548页

作者：张波金显仕 Key Laboratory for Sustainable Utilization of Marine fishery Resources Ministry of Agriculture Key Laboratory for fishery Resources and Co-Environment Shandong Province Yellow Sea Fisheries research Institute Chinese Academy of Fishery Sciences

Based on two bottom trawl surveys conducted in autumn 2000 and 2001, a total of 1106 stomach samples of Bombay duck Harpadon nehereus between 23–278 mm fork length were collected and analyzed. The results show that Bombay duck prey items consisted of 11 groups or 32 species, of which Apogon lineatus, Leptochela gracilis, Acetes chinensis, and Euphausia pacifi ca were the dominant prey species. Ontogenetic variations were found in feeding habits and feeding activity of Bombay duck. Feeding activity was highest in fi sh smaller than 50 mm, lowest in fi sh between 50 and 99 mm, and then increased with increasing size thereafter. As Bombay duck size increased, fi sh prey increased in importance, whereas euphausiids and decapods decreased in importance. Different trophic guilds were observed in feeding habits across the examined size range. Bombay duck smaller than 50 mm were zooplanktivores, mainly feeding on zooplankton and fi sh larva; those between 50 and 149 mm were generalist predators, mainly feeding on pelagic shrimps, demersal shrimps and fi shes; and those larger than 150 mm were piscivores, mainly feeding on fi shes.

关键词： Harpadon nehereus diet composition feeding activity dietary overlap ontogenetic variation

Monthly variation in the fat content of anchovy (Engraulis japonicus) in the Yellow Sea: implications for acoustic abundance estimation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2011年第3期29卷 556-563页

作者：张波赵宪勇戴芳群 Key Laboratory for Sustainable Utilization of Marine fishery Resources Ministry of Agriculture Key Laboratory for fishery Resources and Eco-environment Shandong Province Yellow Sea Fisheries research Institute Chinese Academy of Fishery Sciences

Anchovy is a key species in the Yellow Sea ecosystem. An accurate estimate of anchovy abundance is vital for the management of the anchovy stock and measurement of the ecosystem response to changes in anchovy abundance. However, the acoustic fish abundance estimate may be biased by 30%-40% if the fat-content induced target strength variation is not taken into account. We measured the monthly variation in the fat content of anchovy (Engraulis japonicus) in the Yellow Sea, and evaluated the potential effect of variation in fat content on the acoustic assessment of anchovy abundance. The fat content of anchovy varied seasonally, with two maxima and two minima in a year. The highest fat content (14.75%) was measured in the pre-spawning period in May, and the lowest fat content (2.48%) was measured during the post-spawning period in October. Fat content appeared to correlate with water content, but not body size. Assuming that the target strength is decreased by 0.2dB for every 1% increase in fat content, the seasonal difference in the target strength of anchovy may be as high as 2.45 dB. Given this, the acoustic abundance estimate may be biased by between 43% and 76%. Our results highlight the need for more information on the changes in fat content of fishes whose abundance is estimated by acoustic surveys.

关键词： fat content water content target strength acoustic estimation anchovy the Yellow Sea

Estimation of estuarine habitat degradation and its influence on the reproduction process of the crab Eriocheir sinensis in the Yangtze River Estuary

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2023年第1期12卷 828-842页

作者： Tingting Zhang Nan Du Zhi Geng Sikai Wang Yu Gao Gang Yang Xiaorong Huang Tao Zhang Ping Zhuang Feng Zhao East China Sea Fisheries research Institute Chinese Academy of Fishery SciencesKey Laboratory of East China Sea Fishery Resources ExploitationMinistry of Agriculture and Rural AffairsShanghai 200090China

Background The provision of habitat for fishery species in estuaries is highly valued and represents one of the most challenging ecosystem service values to ***,quantifying this value is challenging due to complex relationships between habitat change,ecological processes,and environmental *** study aims to estimate estuarine habitat degradation and its impact on the reproduction process of the crab Eriocheir sinensis by characterizing the changes in breeding habitat and investigating relationships between the species and its habitat in the Yang-tze River *** A species distribution model recently developed was applied to estimate the extent and quality of breeding habitat changes from *** intrinsic(physiological)and external(structural)reproductive attributes of the breeding process were measured to assess the effects of habitat *** relationships among habitat change,reproductive attributes and environmental factors were analyzed to understand the underlying driving forces of habitat degradation for breeding process by multivariate statistical *** About 34.24%of essential habitat was lost,mainly in highly suitable areas due to reclamation and waterway *** degradation significantly affects female distribution and their reproductive processes,particularly gonad development during the pre-reproductive period and fecundity during the reproductive period,without altering population *** results indicated that the main ecological function served by the highly suitable breeding ground was the provision for development of gonad and improvement of *** of salinity and turbidity,caused by hydrodynamic changes from large-scale waterway construction,were identified as the environmental determinants contributing to cumulative habitat *** influences ultimately led to a decrease in the fecundity of *** Our research sheds light on the quantif

关键词： fishery habitat provision Breeding habitat degradation Reproductive process Estuarine ecosystem

同方期刊数据库