| 摘要: |
| 种群的补充、生长和死亡是决定种群数量及其变动类型的三个相互联系过程。要阐明种群补充过程的基本理律，就必须对它的各个环节加以深入的研究。生殖力的变动及其调节规律就是补充过程的最主要环节之一。
从1958年秋季开始，我们进行了大黄鱼生殖力种内规律的研究。本文是其中的一个组成部分，在于研究浙江舟山渔场岱衢洋产卵场的春宗与秋宗大黄鱼的个体生植力变动规律，着重阐明一个种群内个体生殖力的变动与调节规律及其影响因子，探讨同一地理种群的不同生物学宗个体生殖力变动规律的差异及其适应意义o 春宗大黄鱼共观察分析了304尾;秋宗大黄鱼由于取样不易，仅观察分析了41尾。所据以观察分析的资料均系未出现透明和游离状卵子的典型IV期卵巢。卵子的计数是采用重量取样法，取样重为0.2-0.3克。卵巢采用5%福尔马林液固定保存，称重前几天移入80%酒精中，这样可以减少因水分重量所产生的误差。取样时先除去卵巢外膜井取卵巢中部卵子作为计数样品。凡是开始累积卵黄颗粒的小型卵子到半充满与完全充满卵黄的中型及大型卵子都进行计算，卵径范围为0.16一0.99毫米。 |
| 关键词: 大黄鱼 个体生殖力 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第185号 |
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| A STUDY OF THE INDIVIDUAL FECUNDITY OF THE LARGE YELLOW CROAKER, PSEUDOSCIAENA CROCEA(RICHARDSON), OFF TAICHU-YANG,CHEKIANG |
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ZHENG WEN-LIAN, Xu Gong-Zhao
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| The present paper deals principally with the dynamics and difference of individual fecundity in the spring and autumn spawners of Large Yellow Croaker, collected in the periods from March-June and September-一October， 1959 from Taichu-Yang, Chekiang.
1n 304 spring spawners studied, the individua1 absolute fecundity ranges from 52.2 to1616.8 (× 1,000) (average 376.2); the individua1 relative fecundity r/q ranges from276.7 to 1005.9 (×1) (average 608.7) and r/1 from 2.1 to 32.7 (× 1,000) (average9.9). 1n 41 autumn spawners studied, the individual absolute fecundity ranges from156.1 to 601.2 (× 1,000) (average 286.8); the individua1 relative fecundity r/q from304.3 to 726.6 (×1) (average 459.5) and r/1 from 4.5 to 14.1 (× 1,000) (average 7.8).
After analysing the relations of individual fecundity to weight (excluding the gut and the gonads) ， standard 1ength and age of this fish, we consider that: 1, The individual fecundity increases, but differently, with the increase of weight, length and age.2, 1t is closely associated with weight rather than with length and age. Therefore the main influential factor is growth. |
| Key words: individual fecundity Large Yellow Croaker influential factor |
