|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Ontogenetic resource use and trophic dynamics of endangered juvenile Tachypleus tridentatus among diversified nursery habitats in the northern Beibu Gulf,China显示文摘Horseshoe crabs,the most well-known example of“living fossils”,are iconic and ecologically important macroinvertebrates in coastal and estuarine ecosystems.Their blood is a crucial resource for manufacturing Limulus or Tachypleus amebocyte lysate to detect bacterial endotoxins or fungal contamination in drug and medical devices.An enhanced understanding of their ecological roles and trophic interactions in the food webs is fundamental to facilitate resource management for the declining populations in Asia.Foraging information of the Asian species,however,is mainly derived from preliminary,scattered reports from a limited number of study locations.In this study,resource utilization,trophic niche dynamics,and trophic interaction of the juvenile tri-spine horseshoe crab,Tachypleus tridentatus(instars 1–12,approximately 0.5–8 years old)across ontogeny was assessed in diversified nursery habitats along the northern Beibu Gulf,China,using carbon and nitrogen stable isotopes.Our results suggest that:(i)T.tridentatus are ecological generalists given the vast range of carbon isotopic values and trophic niche width estimates exhibited between multiple instar groups;(ii)juvenile T.tridentatus across most habitat types predominantly assimilated energy from a variety of basal production sources in the food web,but primarily depended on sedimentary organic matter and seagrass resource pools;(iii)ontogenetic shifts in juvenile dietary proportions were evident,with decreased reliance on sedimentary organic matter,coupled with increased reliance on benthic macroinvertebrate grazers,detritivores,and omnivores with age;and(iv)nearly all juvenile instars occupied similar trophic positions in the food web with slight shifts in trophic position present with increasing size.Our findings indicate that resource availability and ontogenetic diet shifts strongly influence horseshoe crab trophic dynamics,and age should be accounted when formulating habitat conservation measures based on resource use for Asian horseshoe crabs. | Kit Yue KWAN Justin BOPP Shuyan HUANG Qiao CHEN Chun-Chieh WANG Xueping WANG Wenquan ZHEN Junhua ZHU Xing HUANG | 2021 | Integrative Zoology2021，16，6： | 1 |
| 2 | 夏季广东省鲎保护区潮间带大型底栖动物群落研究显示文摘广东省划设有6个鲎保护区,但对鲎种群具体分布位置、数量及趋势数据几近空白,阻碍了科学管理策略制定和保护行动推进。为此,采用野外调查方法分别对该6个鲎保护区幼鲎资源现状展开调查,并对保护区潮间带大型底栖动物群落进行分析。结果表明,广东省6个鲎保护区中仅遂溪中国鲎保护区和徐闻圆尾鲎保护区发现有幼鲎分布,其中徐闻圆尾鲎保护区内幼鲎丰度极低,调查整个保护区仅发现2只幼鲎;遂溪中国鲎保护区幼鲎丰度为6.45 ind·100m^(-2),但低龄期幼鲎个体数量明显低于高龄期。保护区潮间带大型底栖动物功能群分析显示,遂溪大型底栖动物以浮游生物食者为主,徐闻以植食者为主,浮游动物、微藻类以及浮游植物等天然饵料资源充足,符合幼鲎的摄食习性。此次鲎保护区资源调查表明广东省鲎资源现状严峻,鲎保护区管理亟待改善。提升鲎的保护等级、科学的人工放流、行之有效的保护区管理措施等行动已势在必行。 | 李银康 鲍虞园 林吴颖 KWAN Kit Yue 饶义勇 颉晓勇 | 2023 | 生态科学2023，42，1： | 1 |
| 3 | Spatiotemporal Distribution of Asian Horseshoe Crab Eggs Are Highly Intermingled with Anthropogenic Structures in Northern Beibu Gulf,China显示文摘Identification,protection and restoration of spawning habitats are vital for protecting the depleted species.Asian horseshoe crabs are ecologically important macroinvertebrates in coastal and estuarine ecosystems.However,their spawning habitat studies were limited to several reports in tropical regions,possibly due to the lack of modified survey methods,particularly in habitats with a lower density of spawning adults,and/or intermingled with anthropogenic structures.In this study,the year-round egg distribution and spawning habitat baselines of Carcinoscorpius rotundicauda and Tachypleus tridentatus were determined in the northern Beibu Gulf,China.Our findings demonstrated that the peak spawning occurred in June–July and ceased in November–January when the average water temperature dropped below 20℃.Egg aggregations were found<10 cm beneath the sediment surface with regular tidal inundation,regardless of seasonal changes,in the vicinity of natural and artificial structures with elevated,mildly sloping substratum within the high tide zones.The nests were characterized by medium-sized sediment grains(0.5–0.9 mm),high temperatures(31–34℃),low water contents(0.8%–0.9%),and total organic carbon contents(0.5%–0.7%),which might maximize the hatching success.The identified nesting beaches were close to nursery habitats for juveniles,and tidal creeks were present as the possible corridor connecting these two important habitats through the dominant mangrove forests.The findings provide valuable insights in the scope of spawning behavior and nest-site selection of Asian horseshoe crabs under a mixture of natural and artificial structures,which could benefit future management efforts for the exploited spawning populations. | KWAN Kit Yue FU Yijian ZHONG Mufeng KUANG Yang BAI Haiwei ZHANG Ce ZHEN Wenquan XU Peng WANG Chun-Chieh ZHU Junhua | 2022 | Journal of Ocean University of China2022，21，3： | 1 |
| 4 | Asian Horseshoe Crab Bycatch in Intertidal Zones of the Northern Beibu Gulf:Suggestions for Conservation Management显示文摘Bycatch poses a severe challenge to global fishery management.Although studies have focused on marine megafauna bycatch,research on relevant issues regarding invertebrates is limited,particularly for the threatened horseshoe crabs.In this study,the distribution of fishing gears and the bycatch intensity of Asian horseshoe crabs in the intertidal zones of the northern Beibu Gulf that harbors the most abundant juvenile Asian horseshoe crabs populations in China were evaluated.Seven intertidal nursery habitats for Tachypleus tridentatus and Carcinoscorpius rotundicauda were surveyed from May to July in 2021.A transect that crossed the tidal creeks and tidal flats between the high tide embankment/vegetation and low tide line of a given habitat was surveyed during the ebb tides.The type,number,and GPS of fishing gears were recorded when sighted,and the number and prosomal width of each horseshoe crab species were measured.Bycatch intensities differed among habitats,ranging from 0.3 to 18.4 and 1.2 to 22.7 individuals per kilometer of transect for T.tridentatus and C.rotundicauda,respectively.Among the three identified fishing gear types,ground cages and stick net sets caused a stronger bycatch pressure on these two species.Most T.tridentatus bycatch and C.rotundicauda bycatch were large individuals in late juvenile and adult stages.Therefore,the ground cages and stick net sets along/near the tidal creeks,mangrove fringe,and low tide line should be regulated and removed to ensure the functionality of the intertidal zone as the spawning corridor and nursery habitat of Asian horseshoe crabs. | WANG Chun-Chieh CHEN Ruifang YANG Xin WEN Yulong KUANG Yang ZHANG Ce ZHU Junhua KWAN Kit Yue | 2022 | Journal of Ocean University of China2022，21，3： | 1 |
| 5 | Influence of Tidal Cycles on Embryonic Rotation,Hatching and Emergence of Mangrove Horseshoe Crab,Carcinoscorpius rotundicauda显示文摘Horseshoe crabs are iconic and ecologically significant macroinvertebrates in coastal environments.The processes and mechanisms of larval hatching in Asian horseshoe crabs that occurs beneath the sand are largely unknown.The spawning and developmental ecology of Tachypleus tridentatus and T.gigas are assumed to be similar to their Atlantic counterpart Limulus polyphemus.However,Carcinoscorpius rotundicauda has been cited as an exception owing to their frequent sightings in muddy mangrove areas even during low tides.To reveal the larval hatching mechanisms,in this study,we examined varying hatching responses of C.rotundicauda embryos within the sediment to the environmental conditions under continuous tidal cycles.During the eight-week experiment,the count of hatched larvae ranged 4%–30%per week,while the cumulative emergence rate from the sediment was 0–47%.Embryos were observed to have the highest active rotation activity in the first two weeks after incubation.The inundation of tidal water significantly enhanced the occurrence of hatching,in which hydration,osmotic shock and possibly agitation had triggered or facilitated the eclosion.The larvae were found to remain in the sediment for approximately 2–6 weeks before emergence.In general,C.rotundicauda was found to share a similar hatching mechanism with L.polyphemus.Our findings provide insight into the developmental ecology of Asian horseshoe crabs exposed to varying tidal conditions,and are helpful to the management and protection of their spawning habitats. | KUANG Yang TAN Kian Ann FU Yijian YANG Xin XU Peng ZHEN Wenquan WANG Xueping HUANG Xing ZHU Junhua WANG Chun-Chieh KWAN Kit Yue | 2022 | Journal of Ocean University of China2022，21，3： | 0 |
| 6 | High Microplastic Contamination in Juvenile Tri-Spine Horseshoe Crabs:A Baseline Study of Nursery Habitats in Northern Beibu Gulf,China显示文摘Microplastics(MPs)are ubiquitous in marine sedimentary environments.Their occurrence in horseshoe crabs and interactions with the sedimentary environment has not been determined.In this study,MPs,mostly microfibers,were found in all extracted gastrointestinal tract(GIT)samples of the juvenile Tachypleus tridentatus from the northern Beibu Gulf,China.The MP concentrations(4–53 items ind-1)were higher than those in most marine benthic invertebrates(<15 items ind-1)reported in Chinese waters,despite their generally low level in habitat sediments(9–1818 items kg-1).The correlation between the juveniles and sediments was not evident,but the abundance in juvenile horseshoe crab GITs decreased with ages.The findings were relevant to the life-history characteristics of the species,typically with limited dispersal capability and their spending nine years or longer time living in mangrove wetlands during low tides,with apparent ontogenetic changes in their diets.These baseline data enable a better understanding of MP availability in benthic macroinvertebrates,and the ecological risks present in the ecosystems. | WANG Xueping LO Hoi Shing FU Yijian WU Zhou QIN Danmei HUANG Xing ZHU Jingmin CHEUNG Siu Gin KWAN Kit Yue | 2022 | Journal of Ocean University of China2022，21，3： | 0 |
| 7 | Indiscriminate Dietary Compositions of Two Asian Horseshoe Crabs,Tachypleus tridentatus and Carcinoscorpius rotundicauda:Evidence from Hemolymph Stable Isotopes显示文摘Knowledge of dietary compositions is essential to the recovery of the dwindling populations of horseshoe crabs in China.The feeding habits of Tachypleus tridentatus and Carcinoscorpis rotundicauda of Pearl Bay in southwestern China were studied by stable isotope analysis.Hemolymph samples of the two species were obtained from two age groups living in different habitats(inner,central,and outer Bay).In addition,their potential food source samples were collected in May 2019.Results showed that the mean values ofδ^(13)C andδ^(15)N in C.rotundicauda individuals ranged from−19.01‰to−16.47‰and from 10.49‰to 13.5‰,respectively,and those of T.tridentatus ranged from−19.12‰to−14.96‰and from 8.78‰to 13.48‰,respectively.These values indicated that the horseshoe crabs have a wide variety of food sources and therefore are highly omnivorous.No remarkably correlations were found betweenδ^(13)C andδ^(15)N values and individual widths in the two species.Thirteen potential food sources were selected,in which Sipunculus nudus,Batillaria zonalisi,and Ulva lactuca contributed largely to the dietary compositions of the two species of horseshoe crabs.No significant correlation was found between the feeding habits and habitat geochemical characteristics of the horseshoe crabs.All these results possibly indicate the high diversity of their food sources and the indiscriminate dietary compositions of the two Asian horseshoe crabs. | LI Yuhong FENG Jianxiang KWAN Kit Yue TAN Yiran WENG Bosen JIA Ruiling | 2022 | Journal of Ocean University of China2022，21，3： | 0 |
| 8 | Transcriptome Analysis of the Digestive Tract of Tachypleus tridentatus and Carcinoscorpius rotundicauda显示文摘Transcriptome assemblies for the stomach,midgut,and fecal mucosa of Tachypleus tridentatus and Carcinoscorpius rotundicauda are reported for the first time in this study.Genome assembly resulted in 373069 unigenes with an N50 of 1314,while transcriptome assembly resulted in 736378 unigenes and an N50 of 2121.The annotated unigenes showed the highest similarity to fishes,amphibians,and reptiles,with most unigenes closely related to metabolism,translation,biogenesis,signal transduction,energy production,immune response,and secretion.Unigenes(4768)were mapped to KEGG pathways,and the most enriched pathways were involved in translation,environmental information signal processing,metabolism,endocrine system,immune system,nervous system,and varying metabolism.Totally 65889,2001,and 7162 differentially expressed genes(DEGs)were identified in the stomach,midgut,and fecal mucosa between the two horseshoe crab species,respectively.Compared with C.rotundicauda,99.95%of the DEGs in the T.tridentatus stomach were down-regulated,while 99.97%of the DEGs of T.tridentatus fecal mucosa and 55.42%of the DEGs of the T.tridentatus midgut were up-regulated.Most midgut DEGs were involved in hydrolase activity,protein metabolism,and cell cytoplasm,while most stomach and fecal mucosa DEGs were involved in catalytic activity and primary metabolic processes.Most stomach DEGs were assigned to the cellular component in cellular macromolecular complexes,while most fecal mucosa DEGs were assigned to the cellular component in cell and cell parts.These results will benefit the investigation of the molecular mechanisms of the digestive tract related to the feeding habits and environmental traces of horseshoe crabs. | LI Yuhong KWAN Kit Yue LI Sansu LIU Yingchun WENG Bosen HUANG Wenshu WENG Zhaohong | 2022 | Journal of Ocean University of China2022，21，3： | 0 |
| 9 | 新农科背景下“水产动物疾病学”课程思政教学的改革探索显示文摘在新农科背景下,如何挖掘非思政课程中的思政元素并将其融合到课程教学中是实现培养新型人才之立德树人的关键。文章以“水产动物疾病学”课程为例,围绕大国“三农”情怀、大国“工匠”精神、家国情怀、历史责任和使命、生态文明建设、美丽中国建设使命感和责任感、人与自然和谐发展、服务农业农村发展、脱贫攻坚和乡村振兴、创新意识和能力等方面,挖掘了该课程的思政案例,并通过修订教学大纲、扩充教学内容和改进教学方法等举措驱动该课程思政改革,以期为培养有正确价值观的三农型乡村人才队伍和相关课程教育改革提供保障和参考。 | 蔡小辉 彭银辉 彭亚 张虹 杨绍宇 KWAN KIT YUE 宋静静 胥鹏 | 2023 | 黑龙江水产2023，42，6： | 0 |
| 10 | 利用潮间带大型底栖动物群落评估茅尾海生态环境质量显示文摘平陆运河是西部陆海新通道的一项重要工程,茅尾海是平陆运河的重要支撑节点。本次调查潮间带大型底栖动物群落,在评估茅尾海生态环境质量的同时,又积累本海域大型底栖动物基线数据,为平陆运河建设期、运营期的科学管理提供科学数据支撑。于2020年10月和2021年1月、4月、7月,在钦州茅尾海东部岸线设置4个采样断面,分别是仙岛公园、沙环村、滨海公园和康王庙村,按照《海洋调查规范》(GB 12763.6-2007)的要求对潮间带大型底栖动物进行采样调查和物种分类鉴定;分析大型底栖动物群落组成、优势种组成及生物多样性指数。调查研究结果表明,茅尾海潮间带大型底栖动物以节肢动物为主,物种占比超过41%,个体数占比超过87%,优势种(IRI>1000)有麦克碟尾虫(Discapseudes mackiei)、台湾泥蟹(Ilyoplax formosensis)、隆背大眼蟹(Macrophthalmus convexus)和四齿大额蟹(Metopograpsus quadridentatus),但优势种在4个断面分布不均,仅麦克碟尾虫出现在各断面;主要种(100≤IRI<1000)有27种,其中仅扁平拟闭口蟹(Paracleistostoma depressum)、背毛小头虫(Notodasus sp.)出现在各断面;常见种(10≤I_(RI)<100)有19种,稀有种(IRI<10)有8种,它们均分布不均;辛普森多样性指数(D)和香农多样性指数(H?)分别为0.435(0.183~0.704)和1.506(0.747~2.256),显著低于2009年相应指标,P值分别为0.004和0.048;Pielou均匀度指数(J)均值为0.475(0.223~0.696),与2009年的Pielou均匀度指数(J)没有显著差异(P=0.109)。综合丰度-生物量曲线(ABC曲线)、香农多样性指数(H?)、大型底栖动物污染指数(IMP)推断茅尾海目前整体海域生态环境处于中等污染水平。综合上述指标,认为目前茅尾海海域整体生态环境已属于中等程度污染。本次调查建立的茅尾海潮间带大型底栖动物数据库,将为未来平陆运河的生态建设和科学运营提供支撑。 | 甄文全 张金凤 杨明柳 KWAN Kit Yue | 2023 | 动物学杂志2023，58，3： | 0 |
| 11 | 红树林变化的驱动力:基于茅尾海30年观测的分析显示文摘了解红树林斑块空间演变,对于全面、准确地评估区域红树林保护、修复效果十分重要。为此,以1990年、2000年、2010年及2019年共4期Landsat影像作为主要数据源,基于监督分类法解译结果,综合景观动态分析、空间叠加分析及主要途径计数等方法对近30年茅尾海红树林斑块面积、数量的变化特征及其驱动因素进行了研究。结果表明:(1)1990—2019年间,茅尾海红树林斑块总面积由479.7 hm^(2)增长到1477.5 hm^(2),红树林质心不断向北、向西偏移;(2)1990—2010年间,茅尾海红树林斑块面积变化的主要驱动力为人为因素,2010—2019年间其主要驱动力为自然因素;(3)茅尾海红树林斑块总数虽从1990年的204个增加到2019年的405个,但斑块密度降低、斑块平均面积增加,说明斑块破碎化现象得到一定缓解,且其主要驱动力为自然因素。红树林人工造林特别是无瓣海桑造林对于研究区红树林恢复起到了积极作用。今后应加强对人工造林的成林过程、斑块扩散机制及其生态修复效果的研究。 | 黄星 袁菁菁 王薛平 KWAN Kit Yue 张骞 | 2022 | 海洋学研究2022，40，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员