| 摘要: |
| 从60年代起,我国开始进行鱼类食性的研究(杨纪明、郑严,1962;杨纪明、林景祺，1966),并且开始以食性分析的方法,对特定海区内的鱼类食物关系进行研究(邓景耀等,1986;张其永等,1981),这为海洋食物链研究提供了初步资料。但至今尚未见有单种鱼食物链结构的研究报道。
蓝点马鮫 Scomberomorus niphonius (Cuvier et Valenciennes)为暖水性、洄游性、中上层鱼类。通常每年6月进入渤海产卵,11月前后离开渤海,向深海做越冬洄游(韦晟,1980)。蓝点马鲛作为渤海的重要经济鱼类之一,近些年来资源量一直保持相对稳定(韦晟,1982;朱德山、韦晟,1983)。进行蓝点马鲛的食物链研究,一方面有助于进行蓝点马鮫资源的预测、增殖及管理,另一方面对阐明渤海生态系统中的能量转换也具有一定意义。本文试图对蓝点马鲛食物链结构问题进行讨论。 |
| 关键词: 渤海、蓝点马鲛、食物链结构 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第1636号 |
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| THE FOOD CHAIN STRUCTURE OF JAPANESE SPANISH MACKEREL IN THE BOHAI SEA |
|
Li Jun
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| This paper is an attempt to get the food chain structure of Japanese Spanish mackerel,Scomberomorus niphonius (Cuvier et Valenciennes), in the Bohai Sea. The major part of samples were obtained from investigation of fishery resource in Bohai Sea from 1982 to 1984. The stomach content of Japanese Spanish mackerel and the important food species were analized grade by grade. The parameters including weight percentage, number percentage and frequency were used to compare the importance among the food items. The important food species.in every trophic level were obtained from stomach-content data. These species constitute the food chain structure of Japanese Spanish mackerel which includes four trophic levels. The changes of food chain structure between Summer (May to Augest)and Autumn (September to November) were discussed. The conclusion was reached that the structure in Autumn is most complicated. The mean trophic level of the important species were evaluated with the method developed by Odum and Heald. Japanese Spanish mackerel whose mean trophic level is 4.2 occupied the highest trophic level of the food chain, and the mean trophic levels of others are:carnivore 3.1-3.3, plankton,2.0-2. 9, phytoplanton 1.0. |
| Key words: FOOD CHAIN STRUCTURE,JAPANESE SPANISH MACKEREL ,BOHAI SEA |
