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31.
The association of scyphomedusae with invertebrates has been long known in the literature; especially with hyperiidsamphipods.The association of echinoderms with jellyfish is not common and rarely recorded.We reported the association of theophiuroid Ophiocnemis marmorata with the rhizostome scyphomedusa Rhopilema hispidum collected in Vellar estuary (on thesoutheast coast of India).O.marmorata is supposed to be a filter feeding ophiuroid,quite common in soft bottom of shallow waters.The brittle stars possibly seek for food supply,shelter and protection through the association. 相似文献
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REN Guoyan） ） LI Bafang） * ZHAO Xue） ZHUANG Yongliang） YAN Mingyan） HOU Hu） ZHANG Xiukun） CHEN Li）） Food Bioengineering Department Henan University of Science Technology Luoyang P. R. China ） College of Food Science Engineering Ocean University of China Qingdao P. R. China 《中国海洋大学学报(英文版)》2009,8(1)
In order to select an optimum extraction method for the target glycoprotein (TGP) from jellyfish (Rhopilema esculentum) oralarms, a high performance liquid chromatography (HPLC)–assay for the determination of the TGP was developed. Purified target glycoprotein was taken as a standard glycoprotein. The results showed that the calibration curves for peak area plotted against concentration for TGP were linear (r = 0.9984, y = 4.5895x+47.601) over concentrations ranging from 50 to 400 mgL-1. The mean extraction... 相似文献
33.
Macrobenthic community structure and species composition in the Yellow Sea and East China Sea in jellyfish bloom 总被引：2，自引：0，他引：2
To understand the characteristics of macrobenthic structures and the relationship between environment and benthic assemblages in jellyfish bloom, we studied the macrobenthos and related environmental factors in the coastal waters of the Yellow Sea and East China Sea. Data were collected during two seasonal cruises in April and August of 2011, and analyzed with multivariate statistical methods. Up to 306 macrobenthic species were registered from the research areas, including 115 species of Polychaeta, 78 of Crustacea, 61 of Mollusca, 30 of Echinodermata, and 22 of other groups. Nine polychaete species occurred at frequencies higher than 25% from the sampling stations： Lumbrineris longifolia, Notomastus latericeus, Nin6e palmata, Ophelina acuminata, Nephtys oligobranchia, Onuphis geophiliformis, Glycera chirori, Terebellides stroemii, and Aricidea fragilis. Both the average biomass and abundance of macrobenthos are higher in August （23.8 g/m^2 and 237.7 ind./m^2） than those in April （11.3 g/m^2 and 128 ind./m^2）; the dissimilarity ofmacrobenthic structures among stations is as high as 70%. In terms of the dissimilarity values, we divided the stations into four clusters in spring and eight in summer. The ABC curve shows that the macrofauna communities in high jellyfish abundance were not changed. Canonical correspondence analysis showed that depth, temperature, median grain size, total organic carbon of sediment and total nitrogen in sediment were important factors affecting the macrozoobenthic community in the study area. 相似文献
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36.
The association of scyphomedusae with invertebrates has been long known in the literature; especially with hyperiids amphipods.
The association of echinoderms with jellyfish is not common and rarely recorded. We reported the association of the ophiuroid
Ophiocnemis marmorata with the rhizostome scyphomedusa Rhopilema hispidum collected in Vellar estuary (on the southeast coast of India). O. marmorata is supposed to be a filter feeding ophiuroid, quite common in soft bottom of shallow waters. The brittle stars possibly seek
for food supply, shelter and protection through the association. 相似文献
37.
近十年来,我国黄、东海沙海蜇的数量呈上下波动趋势,除2008、2010、2011、2013年为不暴发年外,其余年份均为暴发年或弱暴发年(本文界定沙海蜇平均丰度范围为2—10ind./100m2为暴发年,1—2ind./100m2为弱暴发年,0—1ind./100m2为不暴发年)。为研究沙海蜇数量年际变化的原因,本文借助同化的海洋模式结果,分析了2006—2013年南黄海沙海蜇平均丰度与表底层海水温度的关系、与不同温度持续时间的关系。研究结果发现,在海州湾附近,对于暴发年2007年和2009年,春季底层海水10—18°C持续时间为130天,比不暴发年2010年和2011年多近15天。在长江口区域,不暴发年2008年和2011年夏秋季底层海水18—25°C持续时间较长,约80天,比暴发年2007年多20天。在长江口、苏北近岸以及海州湾区域,春季底层海水10—18°C持续时间越长,南黄海水母丰度呈现越大的趋势;夏秋季底层海水18—25°C持续时间越长,第二年水母生物量则越大。结果支持和验证了春季底层10—18°C持续时间长有利于当年水母暴发及夏秋季底层18—25°C持续时间长有利于来年水母暴发的推论。本文通过分析沙海蜇丰度和温度变化的关系,可以为将来预测该水母数量提供基础。 相似文献
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Bacterial abundance, phytoplankton community structure and environmental parameters were investigated to study the relationships between bacteria and phytoplankton during giant jellyfish Nemopilema nomurai blooms in the central Yellow Sea during 2013. N. nomurai appeared in June, increased in August, reached a peak and began to degrade in September 2013. Results showed that phosphate was possible a key nutrient for both phytoplankton and bacteria in June, but it changed to nitrate in August and September. Phytoplankton composition significantly changed that pico-phytoplankton relative biomass significantly increased, whereas other size phytoplankton significantly decreased during jellyfish bloom. In June, a significantly positive correlation was observed between chlorophyll a concentration and bacterial abundance(r=0.67, P0.001, n=34).During jellyfish outbreak in August, there was no significant correlation between phytoplankton and bacteria(r=0.11, P0.05, n=25), but the relationship(r=0.71, P0.001, n=31) was rebuilt with jellyfish degradation in September. In August, small size phytoplankton occupied the mixed layer in offshore stations, while bacteria almost distributed evenly in vertical. Chlorophyll a concentration significantly increased from(0.42±0.056) μg/L in June to(0.74±0.174) μg/L in August, while bacterial abundance just slightly increased. Additionally, the negative net community production indicated that community respiration was not entirely determined by the local primary productivity in August. These results indicated that jellyfish blooms potentially affect coupling of phytoplankton and bacteria in marine ecosystems. 相似文献
39.
黄、东海水母质点追踪影响因素分析 总被引：5，自引：3，他引：2
基于数值模型采用质点追踪的方法对大型水母的运移规律及其聚集的影响因素进行了研究。本文共设置6个质点释放区,分别从3、4、5月1日释放后追踪至9月30日。主要结论有:(1)采用不含潮汐过程与包含潮汐过程的水动力模式分别对表层质点进行追踪,结果表明含潮汐混合和潮汐非线性效应的POM模式对质点时空分布的模拟较为可靠;(2)基于含潮汐过程的POM模式气候态模拟结果,考虑质点垂直运动进行追踪,质点运移速度较表层追踪大大减慢,进入朝鲜/对马海峡的质点减少;其中济州岛沿岸质点几乎全部穿过朝鲜/对马海峡进入日本海,其它释放区质点最终广泛分布在南黄海以及东海中陆架,主要在黄海潮汐锋区和长江口以南沿岸锋聚集;(3)通过分析不同释放时间对质点在9月末分布的影响发现,质点释放时间偏早,即水母幼体形成较早,将使相对较多的质点向朝鲜/对马海峡聚集。 相似文献
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Lack of association between color morphs of the Jellyfish Cassiopea andromeda and zooxanthella clade
Kathrin P. Lampert Patrick Bürger Sebastian Striewski Ralph Tollrian 《Marine Ecology》2012,33(3):364-369
Understanding the ecology and evolution of the cnidarian-algal symbiosis is of major scientific interest as it is sensitive to temperature and strong light and may therefore be susceptible to climate change. The stability of this mutualism is often mediated by host color pigments that influence photosynthetic activity in symbiotic dinoflagellates either by providing the photosystem with irradiance of suitable wavelength or by protecting it from much too much and potentially damaging light. Like scleractinian corals, the upside-down jellyfish, Cassiopea andromeda, relies heavily on the nutrients provided by its symbionts of the dinoflagellate genus Symbiodinium. It occurs in several conspicuously different color morphs and is found in habitats with high levels of irradiation. We tested whether the color morphs of Cassiopea were correlated with the Symbiodinium distribution in the host and whether host color was associated with different clades of Symbiodinium. We found that the presence of color pigment did not correlate with the distribution of Symbiodinium in the host. Symbiodinium was found in both the colored tentacles of the jellyfish and the colorless feeding tentacles. At least six different color morphs co-occurred in the very shallow waters of the Red Sea, but they all hosted a single Symbiodinium clade (clade A1). Therefore, no correlation of host color morph and Symbiodinium clade could be found. Photoaccumulative or photoprotective functions of host pigments, as proposed for some scleractinian corals, thus seem unlikely in the colored tentacles (vesicles) of the upside-down jellyfish Cassiopea andromeda. 相似文献