求翻译：本次采样所得的广东鲂由1-7龄组成(表1)。其中以4龄(30.48% )、3龄(21.91%)居多,低龄鱼、高龄鱼组成较少,其中1龄为3.80% 、7龄为5.72 % 。20多年前的西江渔获物广东鲂年龄组成以4至5龄居多,两者占其中的43.5%。低龄、高龄鱼比例也很少。是什么意思？

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This sampling from the GuangDong New Age by 1 - 7 formation (Table 1). With aging (4, 3) 30.48 % (21.91 % on aging) are mostly low-aging fish, fish, old age, age 1, and 7 to 3.80 % to 5.72 % on aging. More than 20 years ago in the Guangdong to catch up to age 4 to age 5, most of them were both 43.5

This sampling obtained Guangdong bream is composed (Table by 1-7 age 1).In which by 4 ages (30.48%), 3 age (21.91%) majority, the low age fish, the advanced age fish composition are few, 1 age is 3.80%, 7 ages is 5.72%.More than 20 year ago West River fishing attain the Guangdong bream age compositi

Proceeds of this sampling of megalobrama hoffmanni is composed of 1-7 age (table 1). With 4 months of age (30.48%), 3 months of age (21.91%) are mostly composed of young fish, old fish less, of which 1 per cent, 7 months of age 3.8% of age. Catches megalobrama hoffmanni in Xijiang for more than 20 y

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