| 吴亚林,高亚平,吕旭宁,王晓芹,李凤雪,姜娓娓,王军威,张义涛,蒋增杰.桑沟湾楮岛大叶藻床区域菲律宾蛤仔的生态贡献.渔业科学进展,2018,39(6):126-133 |
| 桑沟湾楮岛大叶藻床区域菲律宾蛤仔的生态贡献 |
| Ecological Contribution of Ruditapes philippinarum in the Seagrass Meadow of Sanggou Bay |
| 投稿时间：2017-10-11 修订日期：2017-11-14 |
| DOI： |
| 中文关键词: 大叶藻 菲律宾蛤仔 摄食生理 代谢生理 桑沟湾 |
| 英文关键词: Zostera marina L. Ruditapes philippinarum Feeding physiology Metabolic physiology Sanggou Bay |
| 基金项目: |
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| 摘要点击次数: 4427 |
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| 中文摘要: |
| 桑沟湾楮岛大叶藻(Zostera marina L.)床周边存在大量的底栖菲律宾蛤仔(Ruditapes philippinarum)，为摸清菲律宾蛤仔的生理活动与大叶藻的相互作用，2016年5~7月，在菲律宾蛤仔和大叶藻集中分布区，评估了菲律宾蛤仔种群资源量，现场流水法测定了菲律宾蛤仔个体水平的摄食、代谢生理，围隔实验法探讨了种群水平蛤仔与大叶藻的相互作用。结果显示，桑沟湾楮岛大叶藻床海区菲律宾蛤仔的平均生物量为(572.00±20.23) ind./m2，大(壳长为3.50~4.10 cm)、中(壳长为3.00~3.50 cm)、小(壳长为2.00~3.00 cm)规格各占9.01%、43.60%和47.38%。菲律宾蛤仔的排氨率、耗氧率、滤水率、摄食率分别为(0.44±0.15)~(1.40±0.35) μmol/(ind.·h)、(0.21±0.02)~(0.33± 0.08) mg/(ind.·h)、(0.69±0.38)~(0.83±0.66) L/(ind.·h)和(2.57±0.41)~(3.41±0.68) mg/(ind.·h)，且都随体重的增加而增大。围隔实验设有3个实验组(蛤仔组、大叶藻组和大叶藻+蛤仔组)，1个空白组，每组3个平行(大叶藻30茎枝左右、蛤仔15个左右)，实验进行4 h。研究表明，蛤仔组、大叶藻+蛤仔组和大叶藻组间的溶氧浓度存在显著差异(P<0.05)；蛤仔组与其他3组的氨氮浓度存在显著差异(P<0.05)；蛤仔组、大叶藻+蛤仔组与空白组的水体颗粒物浓度存在显著差异(P<0.05)，大叶藻组与空白组差异不显著(P>0.05)。桑沟湾楮岛海区菲律宾蛤仔养殖面积约为0.5 km2，蛤仔每天可以过滤46 t海水中的悬浮颗粒物，并为大叶藻提供0.4 t的氨氮。本研究为深入揭示大叶藻海区菲律宾蛤仔的生态作用提供了基础数据。 |
| 英文摘要: |
| Ruditapes philippinarum is abundant around the seagrass meadow in Chudao, Sanggou Bay. To determine the interactions between R. philippinarum and Zostera marina L., the amount of R. philippinarum was evaluated in the seagrass meadow at Chudao from May to July, 2016. The feeding and metabolic physiology of R. philippinarum were determined based on an individual experiment with flowing water from the field. The interactions between R. philippinarum and Z. marina were investigated in an enclosure experiment in the field. The results showed that the biomass of R. philippinarum was (572.00±20.23) ind./m2, which included 9.01% large (shell length 3.50~4.10 cm), 43.60% medium (shell length 3.00~3.50 cm), and 47.38% small (shell length 2.00~3.00 cm) clams. The ammonia nitrogen excretion, oxygen consumption, clearance rate, and feeding rate were (0.44±0.15) to (1.40± 0.35) μmol/(ind.·h), (0.21±0.02) to (0.33±0.08) mg/(ind.·h), (0.69±0.38) to (0.83±0.66) L/(ind.·h), and (2.57±0.41) to (3.41±0.68) mg/(ind.·h), respectively. These parameters all increased with increasing body weight of the clams. There were four groups (R. philippinarum, Z. marina, Z. marina+R. philippinarum, and control) with three replicates each in the enclosure experiment, which was run for 4 h. The results revealed significant differences in dissolved oxygen concentration among the R. philippinarum, Z. marina+R. philippinarum, and Z. marina groups (P<0.05). The ammonia nitrogen concentration in the R. philippinarum group was significantly higher than that in the other three groups (P<0.05). Total particles in the R. philippinarum and Z. marina+R. philippinarum groups were significantly lower than those in the control (P<0.05), while no significant difference was found between the Z. marina group and the control (P>0.05). The area of R. philippinarum is about 0.5 km2 around Chudao in Sanggou Bay, approximately filter 46 t of suspended particulates and provide 0.4 t of ammonia nitrogen to the Z. marina meadow by the clam each day. The present findings provides basic data for further revealing the ecological roles of R. philippinarum in Z. marina meadow areas. |
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