• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Spatial and Temporal Variations of Pelagic Copepods in the North Yellow Sea

    2015-04-01 01:57:44CHENHongjuLIUGuangxingZHUYanzhongandJIANGQiang
    Journal of Ocean University of China 2015年6期

    CHEN Hongju, LIU Guangxing, , ZHU Yanzhong, and JIANG Qiang

    ?

    Spatial and Temporal Variations of Pelagic Copepods in the North Yellow Sea

    CHEN Hongju1), 2), LIU Guangxing1), 2),*, ZHU Yanzhong2), 3), and JIANG Qiang2)

    1)Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China,Qingdao 266100, P.R. China?2)College of Environmental Science and Engineering, Ocean University of China, Qingdao266100,P.R. China?3)State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing100012, P.R. China

    This study aims to analyze the spatial and temporal variations of the abundance and biodiversity of pelagic copepods and their relationships with the environmental factors in the North Yellow Sea (NYS). These variations were analyzed on the basis of the survey data of the NYS in four seasons from 2006 to 2007. A total of 31 copepod species that belong to 17 genera, 13 families and 4 orders were identified in the four seasons. Of these copepods, the species belonging to Calanoida is the most abundant component. The dominant species include,,,,, and.is the most important and widely distributed dominant species in all of the seasons. The dominant species have not shown any significant variation for the past 50 years. However, the richness of warm-water species increased. The abundance of copepods significantly varied among different seasons: the average abundance was higher in spring (608.2indm?3) and summer (385.1indm?3) than in winter (186.5indm?3) and autumn (128.0indm?3). Factor analyses showed a high correlation between the spatial distributions of dominant copepods and environmental parameters, and Chl-a was the most important factor that influenced the distribution of copepods. This research can provide the fundamental information related to zooplankton, especially pelagic copepods. This research is also beneficial for the long-term monitoring of zooplankton ecology in the NYS.

    copepod; species composition; abundance; community structure; North Yellow Sea

    1 Introduction

    Copepodsinhabit almost every type of marine environments, and these organisms are considered as the most numerous multi-celled organisms on earth (Turner, 2004). Copepods play an important role in the biological cycling of elements and energy transfer in the oceans and constitute the most abundant and diverse marine communities. The abundance, distribution, and community structure of copepods are evidently influenced by marine environmental conditions (Brugnano., 2012; Temperoni., 2014), and these factors have been suggested as biological indicators of water masses (Wang., 2003; Hsieh., 2004; Wang., 2013).

    The North Yellow Sea (NYS), surrounded by the Liaoning and Shandong Provinces of China and the Democratic People’s Republic of Korea, is a semi-closed shallow sea with an area of 7.13×104km2. The NYS is connected to the Bohai Sea through a narrow channel but is relatively open to the South Yellow Sea (SYS) (Fig.1). The well-known Yantai-Weihai mackerel fishing ground is located in NYS. In the mid-1950s, scientists conducted comprehensive surveys in the NYS to study the ecological relationships among zooplankton, hydrological conditions, and mackerel (Cheng., 1965). The ‘Comprehensive Oceanography Expedition in China Seas (1958- 1960)’ (Comprehensive Survey Office of Ocean Group of Committee of Science and Technology of the People’s Republic of China, 1977) was then facilitated. These surveys reported the elementary features of zooplankton and copepods in the NYS. Since then, studies on zooplankton in the NYS have been very limited (Yang., 2012; Franco., 2014), and specialized research on cope- pods has yet to be performed.

    This study aims to analyze the spatial and temporal variations of the abundance and biodiversity of pelagic copepods and their relationships with the environmental factors in the NYS. It is based on the zooplankton samples collected from four seasonal cruises from 2006 to 2007. This research can provide fundamental information on pelagic copepods and can be beneficial for the long- term monitoring of zooplankton ecology in the NYS.

    2 Materials and Methods

    2.1 Study Area and Sampling Methods

    Four surveys were conducted at 78, 81, 82 and 82 stations in July-August 2006 (summer), January 2007 (winter), April-May 2007 (spring), and October 2007 (autumn), respectively, in the NYS onboard R/V ‘2’ (Fig.1). Zooplankton were sampled with a 505μm mesh ring net (diameter = 0.8m) hauled vertically from the bottom of the sea to the sea surface at a rate between 0.8 and 1ms?1. The volume of the filtered water was determined using a flow meter (Hydrobios, 438110) placed in the net. After each tow was completed, the nets were washed and the samples were preserved in 5% formalin (in seawater) for further analyses. The temperature, conductivity, and depth of the water were obtained using a CTD profiler (Sea-Bird SBE 911). The spatial and vertical distribution characteristics of the temperature and salinity were all published by Bao. (2009); and chl-concentration values were all provided by Professor LI Zhengyan from the Ocean University of China.

    Fig.1 Map of the study area and sampling stations in the North Yellow Sea.

    .2 Laboratory Procedures

    The zooplankton taxa presenting in the samples were identified to the species level when possible; the number of zooplankton was counted under a stereomicroscope (Leica, S8APO). Data were standardized to abundance per cubic meter.

    2.3 Data Analysis

    The dominance () of each species was calculated using the following equation (Xu and Chen, 1989):

    =,

    wherenis the abundance of species,fis the occurrence frequency of species, andis the copepod abundance. The species with a dominance of ≥0.02 were defined as dominant species (Xu and Chen, 1989).

    The correlation between biotic and environmental data was determined using the routine RELATE of the statistical package Plymouth Routines In Multivariate Ecological Research (v6.1.10, PRIMER-E Ltd., 2006) (Clarke and Warwick, 2001). The relationships between the abundance of dominant species and the environmental parameters were analyzed through principal component analysis (PCA) on the basis of the correlation coefficients between the parameters by using SPSS 11.5. Surface temperature (SST), bottom temperature (SBT), surface salinity (SSS), bottom salinity (SBS), surface chlorophyll(Surface Chl-), bottom chlorophyll a (Bottom Chl-a), and depth were considered as the possible controlling factors affecting the distributional pattern of the dominant copepod species. The contours of temperature and salinity were obtained from the gridded data by using Kriging method.

    3 Results

    3.1 Species Composition

    Copepod was the most abundant component among the identified groups. A total of 31 copepod species belonging to 17 genera, 13 families and 4 orders were identified in four seasons. Table 1 shows the number and abundance of copepod species in each season. The species belonging to Calanoida and Cyclopoida were dominant; by contrast, the pelagic species belonging to Harpacticoida and Monstrilloida were very limited. The species belonging to Calanoida was the most abundant and diverse component, accounting for more than 95% of the total abundance (the proportion reached up to 99.2% in spring). In autumn, the richness and abundance of the species belonging to Cyclopoida attained the peak and accounted for 9.8% of the total abundance.

    Most of the copepod species recorded in this study belong to a temperate eurythermal low-saline group. However, several warm-water copepod species, such as,,,,and, were also detected in autumn and winter.

    Table 1 Number and abundance of the copepod species in the NYS in four seasons.

    3.2 Seasonal Variation and Horizontal Distributions of the Total Abundance

    The copepod abundance significantly varied among different seasons (One-way ANOVA,= 16.872,= 0.000). The average abundance was higher in spring (608.2indm?3) and summer (385.1indm?3) than in winter (186.5indm?3) and autumn (128.0indm?3). Fig.2 shows the distribution pattern of the abundance in the NYS. The spatial distribution of the total abundance substantially varied in different seasons. In spring, the copepod abundance varied from 41.5indm?3to 5863.7indm?3. The high value occurred in the coastal area of Liaoning Province, followed by the coastal area of Yantai and Weihai cities; by contrast, the low value was distributed in the central part of the NYS. In summer, the abundance varied from 2.7indm?3to 1899.5indm?3, and approximately showed a northeastwardly declining gradient. The highest abundance occurred in the coastal area of the Shandong Peninsula. The copepod abundance sharply decreased during autumn, and the distribution was relatively uniform. The abundance varied from 8.3indm?3to 988.6indm?3. The high values occurred in the east part of the Liaodong Peninsula coastal area. The low-abundance area was located near the Weihai shore. In winter, the abundance slightly increased to an average of 186.5indm?3, ranging from 11.0indm?3to 1937.0indm?3. The distribution pattern showed an approximate opposite tendency to that of summer. The high-abundance area was located in the coastal area of the Liaodong Peninsula. Two low-abun- dance areas were also found, one in the coastal area of Yantai and the other in the eastern middle part of the surveyed area (38.1?-39.0?N, 123.3?-124.0?E).

    Fig.2. Horizontal distribution of the total abundance of pelagic copepods in NYS (indm?3). a) spring; b) summer; c) autumn; d) winter.

    3.3 Dominant Species

    Six dominant species were recorded in four respective seasons (Table 2):in the four seasons;in autumn and winter;in spring and summer;in spring, summer, and winter;in winter;in autumn and winter.

    was the most important and widely distri- buted dominant species, accounting for 49.2%, 85.0%, 58.0%, and 35.5% of the total abundance in spring,summer,autumn, andwinter, respectively. The abundance ofshowed a clear seasonal variation (Fig.3). The abundance was higher in summer (327.3indm?3) and spring (299.5indm?3) than in autumn (74.3 indm?3) and winter (66.2indm?3).almost occurred at every station in all of the seasons. In spring,was concentrated in the offshore area of LiaodongPeninsula. With the formation of the Yellow Sea Cold Water Mass (YSCWM), the species gradually drifted to the central part of the NYS in summer. In autumn, the abundance sharply decreased, and the distribution pattern was relatively uniform. In winter, the abundance slightly decreased, with the peak value area drifting to the Liaodong Peninsula offshore.

    was dominant in autumn (38.8indm?3) and winter (48.2indm?3), with similar spatial distribution patterns. The high-abundance areas were located in the southern offshore of LiaodongPeninsula (Fig.4). In spring, the species was mainly distributed in the coastal area but rarely found in the central part of the surveyed area. The abundance distribution was quite even in summer (7.7indm?3), and a relatively high-abundance area was found in the offshore area of Weihai City.

    Table 2 Dominance and average abundance of dominant species. The dominant species in each season are in boldface

    Fig.3 Spatial distribution of C. sinicus abundance in the NYS (indm?3). a) spring; b) summer; c) autumn; d) winter.

    was dominant in spring and summer, and the distribution pattern remarkably varied in different seasons (Fig.5). In spring,was the second most abundant dominant species (136.8indm?3). The low-abundance areas were located in the southeast part of the surveyed area along approximately 38.5?N. The abundance sharply decreased in summer (25.3indm?3), and the peak value area drifted to the central region of the surveyed sea area. In autumn, this species was only detected in Changshan Archipelago sea area with a low abundance. A slight increase in the abundance (3.0indm?3) occurred in winter, and the distribution areas extended to both Shandong and Liaodong Peninsula coastal areas.

    Fig.4 Spatial distribution of P. parvus abundance in the NYS (indm?3). a) spring; b) summer; c) autumn; d) winter.

    Fig.5 Spatial distribution of C. abdominalis abundance in the NYS (indm?3). a) spring; b) summer; c) autumn; d) winter.

    The highest abundance of, which was quite scattered in patches, was recorded in spring (157.5 indm?3) and found in the southern offshore area of LiaodongPeninsula, whereas another peak value area was located in the Yantai coastal area. In summer, the distribution pattern ofwas similar to that of, the average abundance being 16.8indm?3. In autumn, the abundance of this species was low, and this species was detected in the shore area near Liaodong Peninsula and in the southeast part of the surveyed area. In winter, the abundance dramatically increased (59.4indm?3); the high-abundance area was located in the southern offshore of LiaodongPeninsula (Fig.6).

    was dominant in autumn (10.7 indm?3) and winter (3.9indm?3), with similar distribution patterns. The area with the highest abundance was in the southern offshore of LiaodongPeninsula (Figs.7a, b).was dominant in winter (5.3indm?3), with a distribution pattern in contrast to that of. The peak value area was located in the southeast corner of the surveyed area(Fig.7d).

    Fig.7 Spatial distribution of Corycaeus affinis (a, b) and Oithona plumifera (c, d) in the NYS (indm?3). a) spring; b) summer; c) autumn; d) winter.

    3.4 Relationship with Environmental Factors

    We initially hypothesized that biotic data were not related to environmental data, but we rejected this hypothesis on the basis of the results of routine RELATE, and the different ρ values of 0.431, 0.328, 0.295, and 0.482 in spring, summer, autumn, and winter, respectively (< 0.001).

    Factor analysis was conducted to determine the bio- logical and environmental parameters that showed a high degree of correlation between the spatial distributions of dominant copepods and environmental factors.

    In spring, the first principal component accounted for 34.3% of the variation in dominant copepods; this result showed a positive factor loading for SST, SBT, surface Chl-, and bottom Chl-. It also yielded a negative factor loading for SSS, SBS, and depth. By contrast, the second principal component, which explained 19.8% of the variation in dominant copepods, showed a positive factor loading for SST, SBT, SSS, SBS and bottom Chl-and a negative factor loading for depth. In the distribution of the factor loading illustrated in the scatter diagram, all of the dominant copepod species were associated with Chl-(Fig.8a).

    In summer, the first principal component explained 38.5% of the variation in dominant copepods, and showed a positive factor loading for SST, SSS, SBS, and depth and a negative factor loading for SBT, surface Chl-, and bottom Chl-. The second principal component, which explained 20.5% of the variation in dominant copepods, showed a positive factor loading for depth, surface Chl-, and bottom Chl-and a negative factor loading for SST, SBT, SSS, and SBS. In the distribution of the factor loading illustrated in the scatter diagram, all of the dominant copepod species were associated with water depth (Fig.8b).

    In autumn, the first principal component explained 45.1% of the variation in dominant copepods, and showed a positive factor loading for bottom Chl-and SBT and a negative factor loading for SSS, SBS, SST, and depth. By contrast, the second principal component, which explained 18.4% of the variation in dominant copepods, showed a positive factor loading for surface Chl-, SBS, and depth and a negative factor loading for SST and SBT. In the distribution of the factor loading illustrated in the scatter diagram, all of the dominant copepod species were associated with surface Chl-and bottom Chl-(Fig.8c).

    Fig.8 Factor loading results of the first and second principal components on the basis of the environmental factors and the dominant copepods in the NYS in each season. a) spring; b) summer; c) autumn; d) winter.

    In winter, the first principal component explained 52.1% of the variation in dominant copepods, which showed a positive factor loading for SST, SBT, SSS, SBS, and depth and a negative factor loading for surface Chl-and bottom Chl-. Conversely, the second principal component, which explained 12.8% of the variation in dominant copepods, showed a positive factor loading for SST, SBT, SBS, and depth and a negative factor loading for SSS, surface Chl-, and bottom Chl-. In the scatter diagram, the factor loadings of the two components were considered as basis to divide dominant copepods into two types: (1) copepods whose abundance was associated with Chl-and (2) species whose abundance was related to water depth, salinity and temperature (Fig.8d).

    4 Discussion

    4.1 Species Richness

    The Lubei Coastal Current, Liaonan Coastal Current, YSCWM and Yellow Sea Warm Current (YSWC) are mixed in the NYS (Su, 1989). The complex hydrological environment brings zooplankton in NYS a characteristic feature. A total of 31 copepod species/taxa have been found in the NYS, close to the number recorded in the Bohai Sea (30) (Bi., 2000) but much lower than that in the South Yellow Sea (92) (Xiau, 1979) and East China Sea (226) (Xu., 2004). From Xiau’s record (1979), no significant changes are found in total species number compared with that found 30 years ago. The richness of species is higher in summer and autumn than that in winter and spring, similar to the previous studies in NYS (Cheng., 1965; Xiau, 1979; Wang., 2005), SYS (Xiau, 1979) and East China Sea (Xu., 2004).

    Most of the copepod species that inhabit the semi- closed NYS belong to temperate eurythermal low-saline species. However, warm-water species were detected in this study, which reflects the influence of warm current. The high-temperature and high-salinity water from East China Sea-Yellow Sea warm current system driven by Kuroshio not only alters the marine environment and atmospheric circulation pattern but also changes the composition of zooplankton species. In autumn, a good number of warm-water copepod species appear with low abundance in the NYS, and such appearance has not been reported before. However, the northward expansion of other warm-water species (and) in the NYS had been reported (Yang., 2012). Climate change might result in YSWC reinforcement and then increase both abundance and species richness of warm-temperate species in the NYS. In winter, the strong north wind drives the southward surface flow along the coast; correspondingly, the YSWC is compensated northward along the Yellow Sea Trough. The water coming from the East China Sea changes the NYS zooplankton community structure.is considered to be a good bio-indicator of YSWC (Wang., 2003). In winter,appeared in 22 stations in the middle and southern part of the surveyed area, with C602 (N38?46.8′, E120?0.6′) being the northernmost station. The result shows that the northward penetrating YSWC could spread to this sea area. In Contrast to the the deep winter penetration, the YSWC becomes much less intrusive in summer (Xu., 2009), hence the absence of warm-water species.

    4.2 Seasonal Succession of Dominant Species

    The main dominant species recorded in this study were,,and, and no significant difference was found between the dominant species of the present study and those in the surveys during 1955-1958 (Cheng., 1965). The distribution of each species showed its respective characteristics in different seasons. Zooplankton distributions are controlled not only by the hydrological environment but also by the interaction among other creatures sharing the same habitat, namely prey, predator and competitor. Temperature and food availability govern the marine copepods growth and productivity (Hirst and Bunker, 2003; Maar., 2013). Species-specific distributions presented in this study might result from the influence of temperature and food availability on the copepods.

    In spring, dominant species include,and, which showed similar distribution patterns. The abundance peak value appeared in the areas near the shore. According to PCA, the species distribution were associated with Chl-(Fig.8a). During the survey period, the hydrological environment condition (see Bao. 2009) was in the favorable temperature ranges for(8.7-25.9℃, Huang., 1993),(8.9-21.1℃, Liang., 1996) and(8-24℃, Sun., 2009). Therefore, the food availability might be an important factor for the growth and distribution of copepods. According to the simultaneous Chl-data, during spring bloom, the phytoplankton abundance is higher in the areas near the shore. Even the nutrient structure and limitations in the onshore area are greatly changed by the rapid consumption of phytoplankton in spring (Zhang., 2009). Accordingly, the mushroom proliferation of phytoplankton supports the rise in copepod dominant species.

    In summer, the distribution center ofmoved to the middle part of the surveyed area. The YSCWM, a bottom pool of the remnant Yellow Sea Winter Water resulting from summer stratification, plays a sheltering role forin summer (Pu., 2004). Accordingly, the present study recorded a high abundance of(>250.0indm?3, Fig.3) occurring in this area (<12℃, Bao., 2009). In addition, the peak value areas ofandwere also shifted to the middle part of NYS (Figs.5b and 6b). According to PCA, these three dominant species distinctly have negative correlation with SBT (Fig.8b). During the survey period, high SST (>21℃, Bao., 2009) exceeded the optimal temperature range, which drove the copepod to migrate downwards to the deep.

    The dominant species changed during autumn. The abundance ofandsharply declined and were sporadically distributed. However,was considered to be an important dominant species. Synchronously,was also significantly increased, whereaswas still the most abundant. According to PCA, the species distribution was associated with Chl-(Fig.8c).andshowed a similar distribution pattern abundant in the Liaoning coastal area (Figs.4c and 7a).

    androse to be the dominant species in winter. The scatter diagram showed two types of dominant species (Fig.8d). Except, other copepods were associated with Chl-a and mainly abun- dant in the area near the shore, especially in the Liaodong Peninsula sea area.

    was the most important copepod species in the NYS. Chen and Zhang (1965) indicated thatis a warm-temperate coastal species, with a wide tolerance range of temperature and salinity (Huang., 1993). As seen in the year-round variation (Fig.3), the abundance and distribution significantly varied in different seasons, andwas always the most abundant copepod in the NYS. According to Cheng. (1965), the abundanceofwas low in March, sharply increased in May, and reached its peak in July. In August, the abundance acutely decreased, whereas in September and October, the abundance raised appreciably. In December, the abundance reached the bottommost value and lasted until the next early spring. Compared with the present study, the year-round variation was quite similar to that in 50 years ago (Cheng., 1965). The highest value presenting in summer indicated that the YSBCW serves as an over-summering shelter for(Pu., 2004).

    The spatial distribution patterns ofandwere quite similar, but the abundance variation throughout the year differed. The peaks occurred in spring, but the secondary peaks ofandwere present in winter and summer, respectively (Table 2, Fig.5, and Fig.6). The variation of YSBCW and temperature are the main factors affectingin the NYS (Wu, 1991). Cheng. (1965) reported thatfaded away after September. According to PCA, the abundance was greatly associated with SST (Fig.8). In winter and spring,wasmainly distributed in the area near the shore, especially in the Liaoning Peninsula coastal area, whereas in summer, the distribution center moved to the middle part of the NYS. The variation pattern was similar to that in 50 years ago (, Cheng., 1965).

    According to Gallienne and Robins (2001),might be the most important copepod in the ocean worldwide and occur in almost any marine environment (Paffenh?fer, 1993).has never been recorded as a dominant species in the NYS before. The species of genushas a wide range of diets, being fed on phytoplankton and faecal pellets. Coprophagy helps explaining the wide distribution of, as faecal pellets are the universal source of food (González and Smetacek, 1994; Porri., 2007). PCA showed that the abundance ofis not related with Chl-a (Fig.8). During this survey, the distribution offollowed the salinity isopleths well (Bao., 2009).

    is highly abundant in winter in the Inland Sea of Japan; therefore, this species has been categorized as a cold-water species (Liang and Uye, 1996). According to Cheng. (1965),showed two peaks in the NYS annually. In July,reached the first peak (171indm?3) and subsequently declined in August. The other peak appeared in October (321indm?3) and maintained more than 200indm?3in November and December (Cheng., 1965). In the present study,was dominant in winter and autumn, with an abundance of 48.2 and 38.8indm?3, respectively.is a small- sized copepod that shows characteristics analogous to,, and. The abundance may be underestimated as a result of the mesh size selection (the samples in our study were collected with a 505 μm mesh plankton net).

    Acknowledgements

    This study was supported by the National Natural Science Foundation of China (31101875, 41210008). We extend our gratitude to the captain and crew of the R/V ‘2’. We also acknowledge Mr. Xu, D. H., Mr. Lin, J., Mr. Chen, X. F., and Mr. Huang, Y. S., for helping with the sampling work on board.Thanks are also to Professor Li, Z. Y. of CESE, OUC, for the data of Chl-in the North Yellow Sea.

    Bao, X. W., Li, N., Yao, Z. G., and Wu, D. X., 2009. Seasonal variation characteristics of temperature and salinity of the North Yellow Sea., 39 (4): 553-562 (in Chinese with English abstract).

    Bi, H. S., Sun, S., Gao, S. W., and Zhang, F., 2000. The ecological characteristics of the zooplankton community in the Bohai Sea I. Species composition and community structure., 20 (5): 715-731 (in Chinese with English abstract).

    Brugnano, C., Granata, A., Guglielmo, L., and Zagami, G., 2012. Spring diel vertical distribution of copepod abundances and diversity in the open Central Tyrrhenian Sea (Western Mediterranean)., 105-108: 207-220.

    Chen, Q. C., and Zhang, S. Z., 1965. The planktonic copepods of the Yellow Sea and the East China Sea. I. Calanoida., 7: 20-131 (in Chinese with English abstract).

    Cheng, C., Cheng, T. C., Wang, R., Ling, Y. R., and Gao, S. W., 1965. Ecological investigations on the zooplankton of the mackerel fishing ground off Yentai-Weihai and adjacent waters., 7 (4): 329-354 (in Chinese with English abstract).

    Clarke, K. R., and Warwick, R. M., 2001.:, 2nd edtion, Primer-E Ltd, 1-37.

    Comprehensive Survey Office of Ocean Group of Committee of Science and Technology of the People Republic of China. 1977.‘’, 8: 1-159 (in Chinese).

    Franco, P., Chen, H. J., and Liu, G. X., 2014. Distribution and abundance of pelagic tunicates in the North Yellow Sea., 13 (5): 782-790.

    Gallienne, C. P., and Robins, D. B., 2001. Isthe most important copepod in the world’s ocean?, 23 (12): 1421-1432.

    González, H. E., and Smetacek, V., 1994. The possible role of the cyclopoid copepodin retarding vertical flux of zooplankton faecal material., 113: 233-246.

    Hirst, A. G., and Bunker, A. J., 2003. Growth of marine planktonic copepods: Global rates and patterns in relation to chlorophyll, temperature, and body weight., 48 (5): 1988-2010.

    Hsieh, C. H, Chiu, T. S., and Shih, C. T., 2004. Copepod diversity and composition as indicators of intrusion of the Kuroshio branch current into the northern Taiwan Strait in spring 2000., 43: 393-403.

    Huang, C., Uye, S., and Onbe, T., 1993. Geographic distribution, seasonal life cycle, biomass and production of a planktonic copepodin the Inland Sea of Japan and its neighboring Pacific Ocean., 15: 1229-1246.

    Liang, D., and Uye, S., 1996. Population dynamics and production of the planktonic copepods in a eutrophic inlet of the Inland Sea of Japan. III.sp., 127: 219-227.

    Liang, D., Uye, S., and Onbe, T., 1996. Population dynamics and production of the planktonic copepods in a eutrophic inlet of the Inland Sea of Japan. I.., 124: 527-536.

    Maar, M., M?ller, E. F., Gürkan, Z., Jónasdóttir, S. H., and Nielsen, T. G., 2013. Sensitivity ofspp. copepods to environmental changes in the North Sea using life-stage structured models., 111: 24-37.

    Paffenh?fer, G. A., 1993. On the ecology of marine cyclopoid copepods (Crustacea, Copepoda)., 15: 37-55.

    Porri, F., McQuaid, C. D., and Froneman, W. P., 2007. Spatio- temporal variability of small copepods (especially) in shallow nearshore waters off the south coast of South Africa., 72: 711-720.

    Pu, X. M., Sun, S., Yang, B., Zhang, G. T., and Zhang, F., 2004. Life history strategies ofin the southern Yellow Sea in summer., 26 (9): 1059-1068.

    Su, Y. S., 1989. A survey of geographical environment circulation system in the Huanghai Sea and East China Sea., 19 (1): 145-158 (in Chinese with English abstract).

    Sun, X. H., Sun, S., Li, C. L., and Wang, S. W., 2009. The effects of temperature and diet on egg production and hatching success of(Copepoda: Calanoida): A laboratory investigation., 49: 78-86 (in Chinese with English abstract).

    Temperoni, B., Vi?as, M. D., Martos, P., and Marrari, M., 2014. Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake., 139: 433-445.

    Turner, J. T., 2004. The importance of small planktonic copepods and their roles in pelagic marine food webs., 43: 255-266.

    Wang, L., Li, C. L., and Yu, F., 2013. Zooplankton community structure in the South Yellow Sea in winter and indication of the Yellow Sea Warm Current., 44 (4): 853-859 (in Chinese with English abstract).

    Wang, R., Gao, S. W., Wang, K., and Zuo, T., 2003. Zooplankton indication of the Yellow Sea Warm Current in winter., 27 (Suppl): 39-48 (in Chinese with English abstract).

    Wang, Y. L., Shen, X. Q., Li, C. H., Yuan, Q., Gui, C. S., and Li, C. S., 2005.. Shanghai Science and Technology Press, Shanghai, 118-132.

    Wu, W. K., 1991. The ecological character ofin the Yellow Sea., 26 (3): 1-5 (in Chinese).

    Xiau, Y. C., 1979. Preliminary studies on the ecological characteristics of the zooplankton of the Yellow Sea., 2: 51-55 (in Chinese).

    Xu, L. L., Wu, D. X., Lin, X. P., and Ma, C., 2009. The study of the Yellow Sea Warm Current and its seasonal variability., 21 (2): 159-165.

    Xu, Z. L., and Chen, Y. Q., 1989. Aggregated intensity of dominant species of zooplankton in autumn in the East China Sea and Yellow Sea., 8 (4): 13-15 (in Chinese with English abstract).

    Xu, Z. L., Cui, X. S., and Chen, W. Z., 2004. Species composition and dominant species study on pelagic copepods in the East China Sea., 28 (1): 35-40 (in Chinese with English abstract).

    Yang, Q., Wang, Z. L., Fan, J. F., Shao, K. S., and Li, H. J., 2012. Zooplankton diversity and its variation in the Northern Yellow Sea in the autumn and winter of 1959, 1982 and 2009., 32 (21): 6747-6754 (in Chinese with English abstract).

    Zhang, H., Shi, X. Y., Zhang, C. S., and Wang, L. S., 2009. Distribution feature s of nutrients structure and nutrient limitation in the North of Yellow Sea.,39 (4): 773-780 (in Chinese with English abstract).

    (Edited by Ji Dechun)

    DOI 10.1007/s11802-015-2787-6

    ISSN 1672-5182, 2015 14 (6): 1003-1012

    ? Ocean University of China, Science Press and Springer-Verlag Berlin Heidelberg 2015

    (October 20, 2014; revised August 3, 2015; accepted August 14, 2015)

    * Corresponding author. Tel: 0086-532-66782672 E-mail:gxliu@ouc.edu.cn

    久久精品夜夜夜夜夜久久蜜豆| 国产国拍精品亚洲av在线观看| 波多野结衣巨乳人妻| 午夜精品在线福利| 国产精品国产三级国产av玫瑰| 亚洲av二区三区四区| 老司机午夜福利在线观看视频| 国产精品女同一区二区软件| 久久人人精品亚洲av| 国产色爽女视频免费观看| 99热6这里只有精品| 久久久久久国产a免费观看| 久久久久久久久大av| 在线观看一区二区三区| av国产免费在线观看| 午夜a级毛片| 波多野结衣高清作品| 丰满的人妻完整版| 日韩av不卡免费在线播放| 国产又黄又爽又无遮挡在线| 最近2019中文字幕mv第一页| 蜜桃亚洲精品一区二区三区| 久久久精品大字幕| 午夜福利在线观看吧| 国产三级中文精品| 亚洲精品日韩在线中文字幕 | 国产精品人妻久久久影院| 久久久久久大精品| av女优亚洲男人天堂| 级片在线观看| 亚洲人成网站在线播放欧美日韩| 色综合亚洲欧美另类图片| 在线观看美女被高潮喷水网站| 亚洲国产色片| av专区在线播放| 在线天堂最新版资源| 别揉我奶头 嗯啊视频| 精品一区二区三区av网在线观看| 精品熟女少妇av免费看| 国产精品人妻久久久影院| 美女内射精品一级片tv| 高清毛片免费看| 精品少妇黑人巨大在线播放 | 大香蕉久久网| av中文乱码字幕在线| 99在线人妻在线中文字幕| 一边摸一边抽搐一进一小说| 国产综合懂色| 亚洲精品一卡2卡三卡4卡5卡| 欧美一区二区精品小视频在线| 国产精品,欧美在线| 亚洲国产精品成人综合色| 夜夜夜夜夜久久久久| 亚洲丝袜综合中文字幕| av在线蜜桃| 久久中文看片网| 亚洲五月天丁香| 国产单亲对白刺激| 亚洲成av人片在线播放无| 国产精品综合久久久久久久免费| 97在线视频观看| 在线免费十八禁| 日本一本二区三区精品| 九九在线视频观看精品| 丰满人妻一区二区三区视频av| 一个人观看的视频www高清免费观看| 欧美中文日本在线观看视频| 国产成人freesex在线 | 久久久a久久爽久久v久久| 给我免费播放毛片高清在线观看| 国产精品永久免费网站| 精品不卡国产一区二区三区| 精品一区二区三区视频在线观看免费| 亚洲熟妇中文字幕五十中出| 午夜免费激情av| 国产69精品久久久久777片| 久久久久久久久中文| 亚洲成人久久性| 高清日韩中文字幕在线| 久久九九热精品免费| 男人的好看免费观看在线视频| 成人午夜高清在线视频| 中文在线观看免费www的网站| 日韩欧美国产在线观看| 日日摸夜夜添夜夜添小说| 免费观看精品视频网站| 国产精品亚洲美女久久久| 变态另类成人亚洲欧美熟女| 国产高清视频在线播放一区| 男人舔女人下体高潮全视频| 91在线观看av| 小蜜桃在线观看免费完整版高清| 日本熟妇午夜| 国产精品综合久久久久久久免费| 欧美日本亚洲视频在线播放| 一级a爱片免费观看的视频| 成人国产麻豆网| 国产精品综合久久久久久久免费| 精品久久久久久成人av| 老司机午夜福利在线观看视频| 欧美最新免费一区二区三区| 最近最新中文字幕大全电影3| a级一级毛片免费在线观看| 日本一本二区三区精品| 身体一侧抽搐| 91久久精品电影网| 12—13女人毛片做爰片一| 亚洲自拍偷在线| 九色成人免费人妻av| 久久久精品欧美日韩精品| 日韩av在线大香蕉| aaaaa片日本免费| 亚洲三级黄色毛片| 亚洲精品一卡2卡三卡4卡5卡| 国产精品无大码| 国产一区二区亚洲精品在线观看| 亚洲av第一区精品v没综合| 国内精品宾馆在线| 欧洲精品卡2卡3卡4卡5卡区| 日韩成人伦理影院| 小说图片视频综合网站| 国产乱人视频| 色在线成人网| 亚洲一级一片aⅴ在线观看| 精品久久国产蜜桃| 狠狠狠狠99中文字幕| 国产黄色视频一区二区在线观看 | 插逼视频在线观看| 大型黄色视频在线免费观看| 婷婷色综合大香蕉| 久久久久久久久大av| 国产黄a三级三级三级人| 欧美激情在线99| 天天躁日日操中文字幕| 精品欧美国产一区二区三| 精品日产1卡2卡| 精品国内亚洲2022精品成人| 黄色日韩在线| 97碰自拍视频| 高清日韩中文字幕在线| 亚洲国产欧美人成| 精品久久久久久久末码| 最近手机中文字幕大全| 欧美中文日本在线观看视频| 国产大屁股一区二区在线视频| 午夜日韩欧美国产| 午夜亚洲福利在线播放| 99久久中文字幕三级久久日本| 麻豆国产97在线/欧美| 岛国在线免费视频观看| 麻豆乱淫一区二区| 国产色婷婷99| 少妇高潮的动态图| 少妇的逼水好多| 婷婷亚洲欧美| 亚洲精品一卡2卡三卡4卡5卡| 国产综合懂色| 日韩成人伦理影院| 在线观看66精品国产| 欧美一区二区精品小视频在线| 国产激情偷乱视频一区二区| 在线国产一区二区在线| 在线天堂最新版资源| eeuss影院久久| 香蕉av资源在线| 久久这里只有精品中国| 久久久精品94久久精品| 夜夜爽天天搞| 欧美成人一区二区免费高清观看| 午夜福利成人在线免费观看| 国产伦精品一区二区三区四那| 亚洲经典国产精华液单| 国产高清视频在线播放一区| 亚洲美女视频黄频| 美女免费视频网站| a级毛片a级免费在线| 国产精品美女特级片免费视频播放器| 亚洲欧美日韩高清在线视频| 在线观看66精品国产| 久久99热这里只有精品18| av在线播放精品| 国产精品美女特级片免费视频播放器| 日韩大尺度精品在线看网址| 亚洲av二区三区四区| 麻豆久久精品国产亚洲av| 欧美bdsm另类| 免费看美女性在线毛片视频| 波多野结衣高清无吗| 成人三级黄色视频| 亚州av有码| 观看美女的网站| 男插女下体视频免费在线播放| 韩国av在线不卡| 又黄又爽又刺激的免费视频.| 免费av不卡在线播放| 国产三级在线视频| 欧美bdsm另类| 18禁在线播放成人免费| 六月丁香七月| 男人狂女人下面高潮的视频| 日日摸夜夜添夜夜添小说| 国产午夜精品论理片| 伦理电影大哥的女人| 亚洲欧美成人综合另类久久久 | 久久九九热精品免费| 国产91av在线免费观看| 欧美潮喷喷水| 国产亚洲精品综合一区在线观看| 久久久久久九九精品二区国产| 久久婷婷人人爽人人干人人爱| 一a级毛片在线观看| 亚洲av第一区精品v没综合| 免费搜索国产男女视频| 国产日本99.免费观看| 亚洲丝袜综合中文字幕| 国产一级毛片七仙女欲春2| 两个人的视频大全免费| 日韩制服骚丝袜av| 久久精品综合一区二区三区| 乱系列少妇在线播放| 欧美最黄视频在线播放免费| 精品一区二区三区视频在线观看免费| 精华霜和精华液先用哪个| or卡值多少钱| 亚洲av免费高清在线观看| 久久久精品大字幕| 高清午夜精品一区二区三区 | 国产成人91sexporn| 婷婷亚洲欧美| 国产精品久久久久久亚洲av鲁大| 国产精品久久久久久精品电影| 日韩欧美免费精品| 成人av在线播放网站| 国产乱人偷精品视频| 日韩精品中文字幕看吧| 国产一区二区在线观看日韩| 成人午夜高清在线视频| 特大巨黑吊av在线直播| 日本黄色视频三级网站网址| 欧美zozozo另类| 国产成人a区在线观看| 亚洲真实伦在线观看| 亚洲精品久久国产高清桃花| 久久久欧美国产精品| 九九久久精品国产亚洲av麻豆| 能在线免费观看的黄片| 99视频精品全部免费 在线| 乱人视频在线观看| 国内久久婷婷六月综合欲色啪| 亚洲激情五月婷婷啪啪| 久久久久九九精品影院| 亚洲国产精品合色在线| 综合色av麻豆| 午夜精品一区二区三区免费看| 亚洲欧美日韩无卡精品| 人妻少妇偷人精品九色| 国产精品亚洲一级av第二区| а√天堂www在线а√下载| 中文在线观看免费www的网站| 久久久午夜欧美精品| 一边摸一边抽搐一进一小说| 人妻制服诱惑在线中文字幕| 久久久久久大精品| 午夜精品一区二区三区免费看| 22中文网久久字幕| 97在线视频观看| 日韩亚洲欧美综合| 免费观看精品视频网站| 精品人妻偷拍中文字幕| 丰满乱子伦码专区| 可以在线观看的亚洲视频| 免费看av在线观看网站| 久久久精品大字幕| 国产精品99久久久久久久久| 人人妻人人澡人人爽人人夜夜 | 小蜜桃在线观看免费完整版高清| 日本黄大片高清| 色哟哟·www| 国产黄色视频一区二区在线观看 | 日韩成人av中文字幕在线观看 | 男女做爰动态图高潮gif福利片| 精品免费久久久久久久清纯| 欧美3d第一页| 国产成人一区二区在线| 精品人妻视频免费看| 校园人妻丝袜中文字幕| 亚洲精品456在线播放app| 一个人看视频在线观看www免费| 深夜a级毛片| 日韩av在线大香蕉| 国产色爽女视频免费观看| 日本-黄色视频高清免费观看| 国产男人的电影天堂91| 熟女人妻精品中文字幕| 亚洲成av人片在线播放无| 精品久久久久久久久亚洲| 免费观看的影片在线观看| 99热这里只有是精品50| 亚洲欧美日韩无卡精品| 国产一区二区亚洲精品在线观看| 少妇熟女欧美另类| 伦理电影大哥的女人| 免费不卡的大黄色大毛片视频在线观看 | 精品人妻偷拍中文字幕| 精品免费久久久久久久清纯| 日韩大尺度精品在线看网址| 黄片wwwwww| 亚洲成人久久爱视频| 亚洲av二区三区四区| 久久久久久国产a免费观看| 又爽又黄无遮挡网站| 欧美不卡视频在线免费观看| 亚州av有码| 一进一出抽搐动态| 麻豆一二三区av精品| 亚洲乱码一区二区免费版| 我要搜黄色片| 国产久久久一区二区三区| 成人特级黄色片久久久久久久| 国产精品一区二区三区四区久久| a级一级毛片免费在线观看| ponron亚洲| 一夜夜www| 国产久久久一区二区三区| 精品一区二区三区人妻视频| 亚洲性夜色夜夜综合| 精品99又大又爽又粗少妇毛片| 国内精品美女久久久久久| 男女边吃奶边做爰视频| 内地一区二区视频在线| 精品不卡国产一区二区三区| 丰满人妻一区二区三区视频av| 日韩av在线大香蕉| 国产色爽女视频免费观看| 日日啪夜夜撸| 卡戴珊不雅视频在线播放| 一区二区三区免费毛片| 久久人人爽人人片av| 欧美人与善性xxx| 亚洲美女视频黄频| 中文字幕av在线有码专区| 婷婷亚洲欧美| 欧美日本亚洲视频在线播放| 亚洲人成网站在线观看播放| 久久精品人妻少妇| 日本精品一区二区三区蜜桃| av国产免费在线观看| 日韩av在线大香蕉| 99热这里只有是精品50| 久久欧美精品欧美久久欧美| 舔av片在线| 一级av片app| 不卡视频在线观看欧美| 黑人高潮一二区| 99热6这里只有精品| 又黄又爽又免费观看的视频| 搡女人真爽免费视频火全软件 | 色播亚洲综合网| 在线播放国产精品三级| 精品一区二区三区人妻视频| 乱人视频在线观看| 亚洲国产精品国产精品| 国产高清视频在线播放一区| 一本一本综合久久| 麻豆久久精品国产亚洲av| 亚洲精品国产av成人精品 | 国产真实乱freesex| 亚洲欧美精品自产自拍| 老司机影院成人| 高清午夜精品一区二区三区 | 国产乱人偷精品视频| 在线观看一区二区三区| 亚洲美女搞黄在线观看 | 精品久久久久久久久久免费视频| 国产精品久久久久久精品电影| 欧美高清性xxxxhd video| 91av网一区二区| 最新在线观看一区二区三区| 精品人妻视频免费看| 成人鲁丝片一二三区免费| 亚洲精品一区av在线观看| 在线免费观看不下载黄p国产| 国产精品一区二区性色av| 国内精品宾馆在线| 日本黄色视频三级网站网址| 久久久色成人| ponron亚洲| 国产真实乱freesex| 人妻夜夜爽99麻豆av| 日本欧美国产在线视频| 两个人的视频大全免费| 亚洲人与动物交配视频| 此物有八面人人有两片| 色视频www国产| 久久人人精品亚洲av| 精品无人区乱码1区二区| 97碰自拍视频| 美女高潮的动态| 免费看a级黄色片| 国产视频内射| 深夜a级毛片| 成年女人毛片免费观看观看9| 亚洲成人精品中文字幕电影| 如何舔出高潮| 少妇丰满av| 国产精品久久电影中文字幕| 国产成人91sexporn| 尤物成人国产欧美一区二区三区| 99久久中文字幕三级久久日本| 午夜久久久久精精品| 99热网站在线观看| 天堂网av新在线| АⅤ资源中文在线天堂| 精品久久久久久久人妻蜜臀av| 丰满乱子伦码专区| 欧美日韩国产亚洲二区| 亚洲av熟女| 亚洲av五月六月丁香网| 日韩高清综合在线| 国产成人精品久久久久久| 在现免费观看毛片| 一进一出抽搐gif免费好疼| 麻豆成人午夜福利视频| 欧美又色又爽又黄视频| 成人二区视频| 久久这里只有精品中国| 男女那种视频在线观看| 男女边吃奶边做爰视频| 日日摸夜夜添夜夜添av毛片| 日本爱情动作片www.在线观看 | 国产精华一区二区三区| 午夜福利高清视频| 韩国av在线不卡| 亚洲乱码一区二区免费版| 蜜桃亚洲精品一区二区三区| 热99在线观看视频| 国产在线精品亚洲第一网站| 亚洲国产欧美人成| 亚洲,欧美,日韩| av在线播放精品| 亚洲经典国产精华液单| 久久国内精品自在自线图片| 国产乱人视频| 欧美中文日本在线观看视频| 草草在线视频免费看| 亚洲无线观看免费| 精品午夜福利在线看| 一本精品99久久精品77| 国产黄a三级三级三级人| 麻豆一二三区av精品| 久久久精品欧美日韩精品| 亚洲,欧美,日韩| 丝袜美腿在线中文| 亚洲中文字幕日韩| 春色校园在线视频观看| 婷婷精品国产亚洲av| av在线天堂中文字幕| 青春草视频在线免费观看| 久久久成人免费电影| 老司机午夜福利在线观看视频| 久久精品人妻少妇| 麻豆成人午夜福利视频| 成年女人看的毛片在线观看| 午夜福利在线观看吧| 天天一区二区日本电影三级| 听说在线观看完整版免费高清| 国产成人a区在线观看| 国产伦精品一区二区三区视频9| 97超级碰碰碰精品色视频在线观看| av在线蜜桃| 国产成人影院久久av| 欧美不卡视频在线免费观看| 嫩草影院新地址| 人人妻人人看人人澡| 99热这里只有是精品在线观看| 成人毛片a级毛片在线播放| 18禁裸乳无遮挡免费网站照片| 亚洲性久久影院| 舔av片在线| 久久久久国产精品人妻aⅴ院| 18禁裸乳无遮挡免费网站照片| 国产精品综合久久久久久久免费| 女人被狂操c到高潮| 久久99热这里只有精品18| 成人综合一区亚洲| 欧美一区二区亚洲| h日本视频在线播放| 亚洲av免费高清在线观看| 国产精品久久久久久亚洲av鲁大| 精品久久久久久成人av| 亚洲av成人av| 亚洲无线观看免费| 在线观看午夜福利视频| 九九在线视频观看精品| 夜夜爽天天搞| 黄色一级大片看看| 有码 亚洲区| 国产aⅴ精品一区二区三区波| 美女免费视频网站| 日本黄色片子视频| 日本免费一区二区三区高清不卡| 美女内射精品一级片tv| 老熟妇乱子伦视频在线观看| 在线观看美女被高潮喷水网站| 联通29元200g的流量卡| 亚洲一级一片aⅴ在线观看| 国产伦精品一区二区三区四那| 男女之事视频高清在线观看| 全区人妻精品视频| 久久精品国产亚洲网站| 一区福利在线观看| 啦啦啦韩国在线观看视频| 午夜亚洲福利在线播放| 中文亚洲av片在线观看爽| 美女 人体艺术 gogo| 精品国产三级普通话版| 99精品在免费线老司机午夜| 日本a在线网址| 欧美日韩一区二区视频在线观看视频在线 | 有码 亚洲区| 日本熟妇午夜| 给我免费播放毛片高清在线观看| 日本五十路高清| 国产91av在线免费观看| 国产成人福利小说| 日韩精品中文字幕看吧| 亚洲国产色片| 婷婷色综合大香蕉| 啦啦啦观看免费观看视频高清| 我要搜黄色片| 精品熟女少妇av免费看| 色视频www国产| 我的女老师完整版在线观看| 欧美日本视频| 性色avwww在线观看| 日本-黄色视频高清免费观看| 国内精品宾馆在线| 国产爱豆传媒在线观看| 51国产日韩欧美| 男女啪啪激烈高潮av片| 麻豆精品久久久久久蜜桃| 亚洲精品亚洲一区二区| 成人av一区二区三区在线看| 卡戴珊不雅视频在线播放| 欧美日本视频| а√天堂www在线а√下载| 久久久久国产精品人妻aⅴ院| 一个人观看的视频www高清免费观看| 成人高潮视频无遮挡免费网站| 校园人妻丝袜中文字幕| 国产探花极品一区二区| 国产一区二区在线av高清观看| 大又大粗又爽又黄少妇毛片口| 丰满人妻一区二区三区视频av| 成年免费大片在线观看| 1000部很黄的大片| av女优亚洲男人天堂| 午夜福利高清视频| 人妻少妇偷人精品九色| 国产高清视频在线播放一区| 最近的中文字幕免费完整| 波多野结衣高清无吗| 国产中年淑女户外野战色| 亚洲精品在线观看二区| a级毛色黄片| 亚洲成人中文字幕在线播放| 久久久国产成人精品二区| 日韩av不卡免费在线播放| 在线免费观看不下载黄p国产| 亚洲精品在线观看二区| 欧美3d第一页| 91av网一区二区| 内地一区二区视频在线| 一a级毛片在线观看| 亚洲图色成人| 亚洲综合色惰| 亚洲欧美日韩高清在线视频| 变态另类丝袜制服| 国产精品99久久久久久久久| 综合色丁香网| 国产欧美日韩精品一区二区| 91久久精品国产一区二区三区| 精品少妇黑人巨大在线播放 | 精品一区二区三区视频在线观看免费| 一进一出抽搐动态| 97人妻精品一区二区三区麻豆| 蜜桃久久精品国产亚洲av| 婷婷六月久久综合丁香| 国产高清三级在线| 在线观看一区二区三区| 久久久久久久亚洲中文字幕| 丰满乱子伦码专区| 免费看光身美女| 午夜福利在线观看吧| 国产午夜福利久久久久久| 三级毛片av免费| 婷婷色综合大香蕉| 国产 一区 欧美 日韩| 成人特级av手机在线观看| 免费看光身美女| 久久久久九九精品影院| 国产三级中文精品| 高清毛片免费看| 亚洲内射少妇av| 欧美人与善性xxx| 欧美xxxx黑人xx丫x性爽| 国产精品综合久久久久久久免费| 99热6这里只有精品| 搡老岳熟女国产| 老女人水多毛片| 九色成人免费人妻av| 亚洲最大成人中文| 午夜福利视频1000在线观看| 日韩人妻高清精品专区| 成年免费大片在线观看|