| 现场胃含物法测定鲐的摄食与生态转换效率 |
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| 引用本文： | 孙耀.现场胃含物法测定鲐的摄食与生态转换效率[J].水产学报,2003,27(3):245-250. |
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| 作者姓名： | 孙耀 |
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| 作者单位： | 中国水产科学研究院黄海水产研究所,山东,青岛,266071 |
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| 基金项目： | 国家自然科学基金重大资助项目(497901001)，国家重点基础研究发展规划项目(G1999043710) |
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| 摘 要： | 2000年7月至9月在山东半岛南部沿海鲐繁殖海域的鱼类养殖网箱中,应用胃含物法测定了渤海优势鱼种鲐的摄食、生态转换效率等生态能量学参数。结果表明,(1)在饵料不受限制时,鲐的摄食量和生长呈不规则波浪式变化,其波距比较恒定,但波高变化较大;(2)鲐的瞬时胃含物重量随时间变化可用指数模型St=9.0876e-0.1868t描述,瞬时排空率Rt=0.1868g·(100g)-1·h-1(按湿重计算);(3)按Eggers公式可求得鲐日摄食量Cd=(15.60±2.55)g·(100g·d)-1(按湿重计算)或(69.84±11.42)kJ·(100g)-1·d-1;(4)实验期间鲐体重随时间的变化可用线性方程Wt=2.23t+16.71描述,由该式可求得其相对平均日生长量Gd=3.72g·(100g)-1·d-1或30.00kJ·(100g)-1·d-1;(5)由于已知的平均日摄食量和平均日生长量,可求得鲐生态转换效率Eg=23.85%(按湿重计算)或42.96%kJ。
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| 关 键 词： | 胃含物法 测定技术 鲐鱼 摄食行为 生态转换效率 生态能量学参数 |
| 文章编号： | 1000-0615(2003)03-0245-06 |
| 收稿时间： | 2014/3/18 0:00:00 |
| 修稿时间： | 2002年6月17日 |
Determination of food consumption and ecological conversion efficiency of Pneumatophorus japonicus by stomach contents method |
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| SUN Yao.Determination of food consumption and ecological conversion efficiency of Pneumatophorus japonicus by stomach contents method[J].Journal of Fisheries of China,2003,27(3):245-250. |
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| Authors: | SUN Yao |
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| Institution: | Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao266071, China |
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| Abstract: | The ecological energetic parameters of Pneumatophorus japonicus ( Houttyn ) , such as food
consumption, growth and ecological conversion eff iciency, were determined by gut content method in net cages
which were situated in f ish reproductive waters in offshore area of Shandong peninsula. The results indicated that,
( 1) under constant experimental conditions, the f ish.. s maximum daily food consumption and daily growth change
as irregular sine wave. The wave distance is constant, but the wave height .. s change is bigger; ( 2) the
Relationship between instantaneous food content in stomach and corresponding time could be described as St
= 9. 0876e
- 0. 1868 t
, and instantaneous gastric evacuation rate calculated by the formula was Rt = 0. 1868g ..
( 100g )
- 1..h
- 1
; ( 3) the daily food consumption calculated according to Eggers.. formula was Cd = 15. 60 ..
2. 55g..( 100g)
- 1..d
- 1
= 69. 84 .. 11. 42kJ..( 100g )
- 1..d
- 1
; ( 4) the change of f ish.. s body weight with time was
linear, which could be described as Wt = 2. 23t + 16. 71. The daily growth could be obtained by the linear
formulae and average body weight at experiment period and was Gd = 3. 72g .. ( 100g ) - 1 ..d- 1 = 30. 00kJ.. ( 100g)
- 1 ..d
- 1
. So ecological conversion ef ficiency could be obtained as Eg = 23. 85% = 42. 96% kJ from
known Cd and Gd values. |
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| Keywords: | Pneumatophorus japonicus food consumption ecological conversion efficiency stomach content method |
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