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The Age, Growth, Fecundity of Carassius auratus in the Guohe River of Guoyang County
Author(s) -
Wan An,
Yu Shijin,
Hu Jin,
Wan Yun,
Wei Ying,
Zhong Ming,
Yang Hongfei,
An Shuqing,
Yan Yunzhi
Publication year - 2015
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300863
Subject(s) - fecundity , carassius auratus , sexual maturity , biology , zoology , body weight , fish <actinopterygii> , population , ecology , fishery , demography , endocrinology , sociology
To assess the water quality of the Guohe River, the age, growth, and fecundity of Carassius auratus in the Guohe River were studied. It was found that the species consists of groups aged one and two with a sex ratio of 30.67:1 (females/males) – C. auratus has the first sexual maturity at the age of one (the year after being hatched). The power function relationship existed between total length (TL) and total or somatic weight (TW, SW). The TL–TW equations for the whole group was TW = 0.0021 TL 2.6392 ( R 2 = 0.9301, p < 0.01), and the TL–SW equations for the whole group was SW = 0.0027 TL 2.4164 ( R 2 = 0.936, p < 0.01), respectively. The individual absolute fecundity was 28 151 eggs. And the relative fecundity was 148.84 eggs/g fish. A linear relationship existed between the absolute fecundity and the total weight. All results showed that there was a suitable environment for the survival of C. auratus in the water area. But in an unstable situation the feral C. auratus population revealed an “exploitation” pattern with younger age, more female, and higher fecundity in the Guohe River, which may have mainly been caused by serious paroxysmal pollution accidents.