栉孔扇贝的氮、磷排泄及其与温度、壳长之间的关系  

Effects of temperature and shell length on the excretion of nitrogen and phosphorus of Chlamys farreri

作　　者：宋娴丽[1] 孙耀[1] 武晋宣[1] 尹晖[1] 徐林梅[1] 

机构地区：[1]中国水产科学研究院黄海水产研究所

出　　处：《水产学报》2007年第1期38-44,共7页Journal of Fisheries of China

基　　金：国家自然科学基金农业倾斜项目(30271021)

摘　　要：通过天然饵料条件下的室内流水法，测定并计算了栉孔扇贝氮、磷排泄物的排泄量及温度和壳长对其的影响，建立了相关的数学模型，并对栉孔扇贝排泄物中各种形态的N、P含量与组成进行了分析。结果显示：在实验条件范围内，扇贝排泄物中VDTN、VPTN的分布范围分别为14．94-248．28μg·（h·ind）^-1、1．47—84．08μg·（h·ind）^-1，VDTP、VPTP的分布范围分别为0．007—42．54μg·（h·ind）^-1、0．916-17．78μg·（h·ind）^-1。DTN、PTN占总氮排泄量的百分比分别为77．2％、22．8％，其中氨氮占50．8％；DTP、PTP占总磷排泄量的百分比分别为75．6％、24．4％。各形态N、P排泄速率均随着温度的升高而增加，溶解、颗粒态N、P与温度之间的关系可以用二项式曲线描述，而与壳长的关系可以用幂函数关系描述。溶解、颗粒态N、P均随温度和壳长的增加呈加速增大的趋势，它们与温度和壳长之间的关系均可用对数曲线加以定量描述，其交互作用模型分别为：VDTN=131．13Lnt＋217．95LnL-617．65，VPTN=67．41Lnt＋54．07LnL-242．37，VDTP=8．67Lnt＋65．82LnL-112．15和VPTP=11．73Lnt＋11．14LnL-43．74，经协方差分析结果表明，其相关系数均呈非常显著水平。The excretion features of farrer＇ scallop （ Chlamy farreri） under simulated natural conditions were studied with the aim of learning the modality of nitrogen and phosphorus excretion, and their excretion rates. Moreover, the investigation of the relationship among water temperature, shell length and alga concentration was also carried out, and some mathematics models about several factors were made. The results showed the excretion rates of DTN and PTN were 14.94 μg · （h · ind） ^-1 to 248.28 μg · （h · ind ）^ -1 and 1. 47 μg · （ h · ind）^ -1 to 84.08 μg · （ h · ind）^ -1, and the excretion rates of DTP and PTP were 0.007 μg · （h · ind）^-1 to 42.54 μg · （h · ind）^-1 and 0. 916 μg · （h · ind）^-1 to 17.78 μg · （h ·ind） ^-1. The content of DTN and PTN were 77.2% and 22.8%, thereinto, the content of ammonia was 50.8%, while the contents of DTP and PTP were 75.6% and 24.4%. The individual total nitrogen and phosphorus excretion rates of the scallop are positively correlated with the shell length and temperature in range of 9.2 - 27.3 ℃. After considering dissolution and particle excretion of nitrogen and phosphorus, the excretion rates of C. farreri ware related to temperature by quadratic equations, and to shell length by the allometric equations. The interaction of temperature and shell length with DTN, PTN, DTP and PTP could be described by the models VDTN = 131. 13Lnt ＋217.95LnL -617.65, VPTN =67.41Lnt ＋54.07LnL - 242.37, VDTP = 8.67Lnt ＋ 65.82LnL - 112.15 and VPTP, = 11.73Lnt ＋ 11.14LnL - 43.74, furthermore, the results of analysis covariance of those models were P 〈0. 01.

关 键 词：栉孔扇贝 氮 磷 排泄 

分 类 号：S917[农业科学—水产科学]