Abstract
This study determined the total length-weight relationships of the four fish species, Inegocia japonica, Gerres decacanthus, Sillago asiatica, and Evynnis cardinalis, belonging to four families. Fishes were collected using commercial trawls from Qinzhou harbor, China. Samples were collected quarterly from March to December 2017. Total length and weight of each specimen were recorded with an accuracy of 0.1cm and 0.1g, respectively. During the sampling period, a total of 111 fish individuals were collected and measured. The allometric coefficient (b) of length-weight relationship varied from 3.08 for Evynnis cardinalis, 3.17 for Inegocia japonica, 3.18 for Sillago asiatica and 3.19 for Gerres decacanthus. Growth was found as isometric for this four fish species.
Highlights
The length-weight relationship (LWR) is often used to evaluate the standing stock biomass and is used to analyze the ontogenetic changes and is used in the assessment of fish in population dynamic [1]
This study provides the first LWRs reports for these four fish species from Qinzhou harbor of China
The total length ranged from 53.0 cm to 124.0 cm and weight from 1.6g to 28.6g, mean total length as 91.8 cm and as 12.1g in weight for Gerres decacanthus
Summary
The length-weight relationship (LWR) is often used to evaluate the standing stock biomass and is used to analyze the ontogenetic changes and is used in the assessment of fish in population dynamic [1]. There are very high number and endemic species of fishes in Chinese Sea [2]. Biological characteristics of some fish species have seldom been researched. The length–weight relationship (LWRs) is an important tool for management and conservation of fisheries [3,4].
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