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Current Zoology 2010年第5期56卷 575-586页

作者： Mary-Jane JAMES-PIRRI Graduate School of Oceanography University of Rhode Island

American horseshoe crabs Limulus polyphemus were tracked using acoustic telemetry and traditional tagging in a semi-enclosed bay on Cape Cod （Pleasant Bay）, Massachusetts, USA, to determine seasonal movement patterns. Fifty-five actively spawning females were fitted with transmitters in 2008 and 2009 and were tracked using acoustic telemetry from May 2008 through July 2010. Fil^een crabs with transmitters also had archive depth-temperature tags attached. In addition, over 2000 spawning crabs （males and females） were tagged with US Fish and Wildlife CIdSFWS） button tags over the same period. Ninety-one percent of the crabs with transmitters were detected during this study. In the spring, crabs were primarily located in the northern section of the bay near spawning beaches, whereas in the fall crabs moved towards the deeper portions of the bay, and some may have overwIntered in the bay. There was evidence that a majority （58%-71%） of the females with transmitters spawned in two sequential seasons. One archive tag was recovered resulting in a year-long continuous record of depth and tem- perature data that, when integrated with telemetry data, indicated that the crab overwintered in the bay. The live recapture rate of crabs with USFWS button tags was 11%, with all re-sighted crabs except one observed inside Pleasant Bay. Eighty-three percent of recaptures were found within 2.5kin of the tagging location, and 51% were observed at the same beach where they were tagged. This study provides further evidence that horseshoe crabs in Pleasant Bay may be philopatric to this embayment

关键词： horseshoe crab New England Telemetry Seasonal movement

Developmental ecology of the American horseshoe crab Limulus polyphemus

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Current Zoology 2010年第5期56卷 550-562页

作者： Mark L.BOTTON Richard A.TANKERSLEY Robert E.LOVELAND Department of Natural Sciences Fordham University Department of Biological Sciences Florida Institute of Technology Department of Ecology Evolution and Natural Resources Rutgers University

During spawning events, horseshoe crab eggs are released from the female＇s oviducts, and fertilized by one or more males. Eggs are shaped by the female into discrete clutches deposited in nests at depths of 10-20 cm on intertidal estuarine beaches. Distinguishing between fxesh eggs and the early developmental stages is obfuscated by the large amount of dense, opaque yolk. The first unambiguous confirmation of development is the formation of the rudimentary prosomatie appendages at the ＂limb bud＂ stage. Several days thereafter, the outer chorion is shed and the developing embryo expands and undergoes a series of molts within the clear inner egg membrane. The trilobite （first iustar） stage thus attained may remain within the beach sedi- ments for several more weeks, until hatching is facilitated by environmental factors such as hydration, agitation, and osmotic shock that accompany the infiltration of seawater into the nests. Trilobites exhibit endogenous eirgatidal swimming rhythms that are entrained by mechanical agitation, suggesting that peaks in larval swimming are timed to coincide with periods of high water and the inundation of the nests. Larval swimming is limited and does not appear to result in long-distance dispersal. The limited dispersal of the larvae has important implications for the population dynamics of relatively isolated populations. The rate of larval development is highly plastic and is influenced by temperature, salinity, dissolved oxygen, and the presence of pollutants. The broad environmental tolerances of horseshoe crab embryos and larvae are important in understanding their current geographic distribution and their evolutionary persistence

关键词： horseshoe crab Limulus Development Embryo Larval dispersal

Comparison of the Macrozoobenthic Community and Sedimentary Environment with and Without horseshoe crab Presence in the Crocodile Island Intertidal Zone,Xiamen,China

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Journal of Ocean University of China 2022年第3期21卷 573-582页

作者： CAI Lizhe ZHAO Xiaoyu PENG Wenqing LIN Jingxiang YANG Deyuan RAO Yiyong FU Sujing CHEN Xinwei CAO Wenzhi College of the Environment and Ecology Xiamen UniversityXiamen361102China Department of Environmental Science and Engineering Xiamen University Tan Kah Kee CollegeZhangzhou363105China Institute of Marine Biology Taiwan Ocean UniversityKeelung20224China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou510300China Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen361005China

In order to compare the macrozoobenthic community and sedimentary environment with and without the presence of horseshoe crabs,the benthic macrofauna,sediment grain size,chromium(Cr),cobalt(Co),nickel(Ni),polycyclic aromatic hydrocarbon(PAHs),organic carbon and nitrogen were seasonally investigated at site A(with horseshoe crab presence),sites B and C(without horseshoe crab presence)in the Crocodile Island intertidal zone in Xiamen from June 2018 to July *** results showed that most of the community parameters of benthic macrofauna,population parameters of common benthic macrofauna and environmental parameters were significantly different at the sites with horseshoe crab versus non-horseshoe crab sites.A two-way ANOVA test showed that the densities of Ceratonereis erythraeensis and Sigambra hanaokai had significant site *** and nonmetric multi-dimensional scaling(NMDS)analysis showed the community composition of benthic macrofauna was significantly different among the three sampling sites over four *** mean sand content at site A(64.32%)was higher than those at site B(36.01%)and site C(18.86%).Conversely,the mean contents of silt,clay,Cr,Co,Ni,organic carbon,organic nitrogen,phenanthrene,and pyrene at site A were lower than those at site B and site *** observations are consistent with the expected preferences of horseshoe crabs to live in areas with 60%sand content,which is associated with abundant and edible clamworms in the Crocodile Island intertidal zone,Xiamen.

关键词： benthic macrofauna Crocodile Island horseshoe crab sedimentary environment intertidal zone

The Sediment and Hydrographic Characteristics of Three horseshoe crab Nursery Beaches in Hong Kong

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Journal of Ocean University of Qingdao 2003年第1期2卷 35-43页

作者： Helen M.C. Chiu Brian Morton Environmental Resources Management (ERM)-Hong Kong Ltd Swire Institute of Marine Science and Department of Ecology and Biodiversity 979 King's Road Taikoo Place Island East Hong Kong University of Hong

horseshoe crab juveniles have been recorded from sand and sandy-mud nursery beaches at Pak Nai (western New Territories), San Tau and Shui Hau (Lantau Island), Hong Kong. In order to provide a better understanding of these beaches and to identify those plausible factors which have made them preferred by spawning horseshoe crabs, environmental parameters, including temperature, salinity, pH and dissolved oxygen content of the water, and particle size distribution and organic matter content of the sediments at the three sites, were determined and compared. The hydrographic and sediment data obtained for the three study sites have revealed some common environmental features. The three nursery beaches are relatively remote, and far (in Hong Kong terms) from urbanized and densely populated areas. The beaches are generally well sheltered from strong wave action and inundated regularly by estuarine waters. horseshoe crab adults tend to select these beaches for spawning as their protected features ensures the laid eggs are less likely to be washed out of the sand, and hatched juveniles can feed on the meiofauna and grow. Sediments of the three beaches largely comprise medium-sized sand particles and are moderately sorted, suggesting medium porosity and good water permeability. Such a sand type, with the generally high oxygen levels in incursing waters, may help create a well-oxygenated micro-environment for the normal development of horseshoe crab eggs, larvae and juveniles. Lantau Island beaches at San Tau and Shui Hau are relatively free from organic pollution, as reflected in generally high dissolved oxygen level, and low BOD 5 and ammonia nitrogen values. Pak Nai is, however, more polluted.

关键词： sediment hydrography horseshoe crab nursery beaches Hong Kong

Death rate due to horseshoe crab poisoning:summarization on Thai reports

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Journal of Coastal Life Medicine 2015年第6期 503-504页

作者： Beuy Joob Viroj Wiwanitkit Sanitation 1 Medical Academic Center Bangkok Thailand Hainan Medical University China

horseshoe crab can be poisonous and intoxication due to intake of horseshoe crab is *** crab intoxication can be seen in many countries with seacoasts including ***,the authors summarized the death rate due to horsesh... 详细信息

关键词： horseshoe crab Poisoning Thailand Toxin

Seasonal movements of American horseshoe crabs Limulus polyphemus in the Great Bay Estuary,New Hampshire (USA)

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Current Zoology 2010年第5期56卷 587-598页

作者： Susanne Y SCHALLER Christopher C.CHABOT Winsor H.WATSON Ⅲ Department of Biological Sciences University of New Hampshire Department of Biology Plymouth State University

The goal of this study was to determine the year round movement patterns of American horseshoe crabs, Limulus polyphemus, in the Great Bay Estuary, New Hampshire （USA） by using acoustic telemetry to track the movements of 37 adult Limulus, for periods ranging from 2 to 31 months. During the winter （December-March） horseshoe crabs moved very little. In the spring, when water temperatures exceeded II^C, horseshoe crabs moved at least 1 km further up into the estuary to shallower subtidal areas about a month prior to spawning. The mean distance traveled during spring migrations was 2.6 ＋ 0.5 （n=20） km up the estuary. Mating occurred in May and June and during these months animals spent most of their time in shallow subtidal areas adjacent to mating beaches. In the summer （July-Augnst）, animals moved 1.5 ± 0.5 （n=26） km down the estuary, towards the ocean, and ranged widely, using extensive portions of the estuary. In the fall （September-November） movement was more limited （0.5 ± 0.5 km; n = 24） while animals settled into wintering locations, where they remained until spring. The mean annual linear range for all animals was 4.5 ± 0.3 km （n =35） and the maximum distance traveled by an individual horseshoe crab within one year was 9.2 km. There was no evidence that any of the horseshoe crabs tracked during this study left the estuary

关键词： Limuluspolyphemus Acoustic telemetry horseshoe crab Tracking Estuary Home range

High Microplastic Contamination in Juvenile Tri-Spine horseshoe crabs:A Baseline Study of Nursery Habitats in Northern Beibu Gulf,China

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Journal of Ocean University of China 2022年第3期21卷 521-530页

作者： WANG Xueping LO Hoi Shing FU Yijian WU Zhou QIN Danmei HUANG Xing ZHU Jingmin CHEUNG Siu Gin KWAN Kit Yue College of Marine Sciences Beibu Gulf UniversityQinzhou535011China Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf Qinzhou535011China Department of Chemistry City University of Hong KongHong Kong SARChina State Key Laboratory of Marine Pollution City University of Hong KongHong Kong SARChina Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation Qinzhou535011China

Microplastics(MPs)are ubiquitous in marine sedimentary *** occurrence in horseshoe crabs and interactions with the sedimentary environment has not been *** this study,MPs,mostly microfibers,were found in all extracted gastrointestinal tract(GIT)samples of the juvenile Tachypleus tridentatus from the northern Beibu Gulf,*** MP concentrations(4–53 items ind-1)were higher than those in most marine benthic invertebrates(horseshoe crab GITs decreased with *** 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 *** baseline data enable a better understanding of MP availability in benthic macroinvertebrates,and the ecological risks present in the ecosystems.

关键词： horseshoe crab invertebrate fiber intertidal cellophane

Circadian regulation of Limulus visual functions:A role for octopamine and cAMP

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Current Zoology 2010年第5期56卷 518-536页

作者： Jasbir S.DALAL Barbara-Anne BATTELLE Whitney Laboratory for Marine Bioscience and the Departments of Neuroscience and Biology University of Florida Department of Internal Medicine and Division of Human Nutrition and Metabolic Diseases University of Texas Southwestern Medical Center

The purpose of this contribution is to review our current understanding of the source and biochemistry of the circadian efferent input to the eyes of the American horseshoe crab Limuluspolyphemus and the impact of this input on the structure, physiology and biochemistry of Limulus eyes. Special emphasis is given to the role of the biogenic amine octopamine and bio- chemical cascades it activates in the eyes. In addition to reviewing published data, we present new data showing that octopamine elevates cAMP levels in Limulus lateral eyes, and we partially characterize the pharmacology of the receptors involved in this response. We also present new data showing that octopamine regulates gene expression in Limulus lateral eyes by activating a cAMP cascade

关键词： horseshoe crab Circadian rhythms Oetopamine Photoreceptors Substance P Arrestin

Efflux of potassium ion is an important reason of HL-60 cells apoptosis induced by tachyplesin

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Acta Pharmacologica Sinica 2006年第10期27卷 1367-1374页

作者： Hal-tao ZHANG~(2.4) Jun WU~3 Hai-feng ZHANG~2 Qi-feng ZHU ~2Institute of Biochemistry.and Molecular Biology,Guangdong Medical College,Zhanjiang 524023,China ~3Affiliated Hospital of Guangdong Medical College,Zhanjiang 524023,China Institute of Biochemistry and Molecular Biology Guangdong Medical College Zhanjiang China Affiliated Hospital of Guangdong Medical College Zhanjiang China

Aim:To investigate the role of intercellular potassium in tachyplesin-induced HL-60cells ***:The concentration of intercellular potassium,cell vol-ume and mitochondrial membrane potential were examined by flow ***:The concentration of intercellular potassium reduced in a time-depen-dent manner in tachyplesin-treated HL-60 *** addition,the loss of mitochon-drial membrane potential was tightly coupled with the shrinkage of cell *** caspase inhibitors protected against DNA degradation but did not pre-vent the loss of HL-60 cell viability induced by ***2+,which was akind of blocker of volume-regulatory K+channels,increased the viability oftachyplesin-treated HL-60 cells and maintained mitochondrial membrane potentialand cell ***:Efflux of K+was an important reason for apoptosisin tachyplesin-treated HL-60 *** of K+affected the viability of tachyplesin-treated HL-60 cells independent of the process of caspase activation.

关键词： horseshoe crab tachyplesin intracellular potassium mitochondrial membrane potential HL-60 cell

The ＂MIZBERING＂ Zuibaiji Conference - A Search for Continuity in the Zuibaiji River Basin-

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Journal of Environmental Science and Engineering(B) 2016年第9期5卷 407-411页

作者： Takaya Anai Satoquo Seino Graduate School of Engineering Kyushu University Fukuoka 819-0395 Japan Department of Urban and Environmental Engineering Graduate School of Engineering Kyushu University Fukuoka 819-0395Japan

The Zuibaiji River is located in the west of Fukuoka city, which has a rich natural resources and history but various problems as well. In order to solve some of these problems, stakeholders need to observe and talk about the river. Also recently, the ＂MIZBERING Project＂ has been opening up possibilities for renewing riverside uses of lost activities from the old days in Japan. This project is being conducted by citizens, companies and government administrations with an interest in waterside areas. The First MIZBER1NG Zuibaiji River Conference was held to discuss the issues of the Zuibaiji Basin. Its purpose was to visit and search out the nature and history of the entire Zuibaiji Basin from its mountains to the sea and to rediscover the Zuibaiji Basin, and finally to discuss future plans for the Zuibaiji Basin and Imazu Tidal Flat at its outlet. After visiting the Zuibaiji Basin, we discovered a problem that the Zubaiji Dam is holding not only water but also sand, and this problem affects the environment of the Zuibaiji Basin, such as its ecosystem and topography. Finally, we provided a venue for the local people to discuss problems and future plans for the Zuibaiji Basin.

关键词： Zuibaiji River MIZBER1NG Project Imazu Tidal Flat oyster reef horseshoe crab black-faced spoonbill.