Population identification of red-fin pargo,Parargyrops edita Tanaka,in Taiwan strait and Beibu Gulf |
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| Authors: | Zhang Qiyong Cai Zeping Xu Xucai |
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| Institution: | (1) Department of Oceanology, Xiamen University, Xiamen |
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| Abstract: | This paper deals with population identification ofParargyrops edita Tanaka. Samples of spawning stocks were collected from Niushan-Penghu, Minnan-Taiwan shoal (Southern Fujian-Taiwan shoal)
and Beibu Gulf during the spawning period 1981–1982. Morphological characters, both meristic and morphometric, are counted
and measured respectively. The stock concept and intraspecific categories have been discussed. Some meristic characters as
the number of left or right ventral fin spine, right ventral fin rays and abdominal vertebrae of this fish may be constant,
others as the numbers of left or right pectoral fin rays and gill-rakers may have obvious geographical variation. Morphological
characters have not attained the level of subspecific distinctness, no sub-species could be found among these stocks by means
of coefficient of difference (C.D.). Basing upon the comparative analysis ofM
diff, the authors consider that stocks of Minnan-Taiwan shoal and Niushan-Penghu belong to the same local population, Taiwan Strait
local population. By means of the discriminant function analysis and linear relationship analysis, statistical differences
will be found to exist in meristic characters between the stock of Minnan-Taiwan shoal and that of Niushan-Penghu, so that
the two are virtually different stocks or subpopulations. The stock of Beibu Gulf belongs to another called the Beibu Gulf
local population. These two local populations are of allopatric distribution and show statistically significant difference
between themselves. Among these stocks, the Minnan-Taiwan shoal stock is strongly influenced by the much more complicated
environmental conditions of the mixed boundary region of the subtropical Sino-Japanese Subregion in the north and the tropical
Indo-Malayan Subregion in the south. Thus its coefficient of variability (C.V.) is greater than those of the other two in
the mean values of various meristic characters.
This paper was published in Chinese inOceanologia et Limnologia Sinica
14 (6): 511–520. |
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