Abstract
Presently reported study examined the length–weight relations for 11 goby species collected from a mangrove estuary of the Red River, Vietnam. A total of 1097 individuals of the following species, representing three goby families, were analyzed: Butis butis (Hamilton, 1822); Butis koilomatodon (Bleeker, 1849); Acentrogobius moloanus (Herre, 1927); Acentrogobius viridipunctatus (Valenciennes, 1837); Apocryptodon madurensis (Bleeker, 1849); Aulopareia unicolor (Valenciennes, 1837); Glossogobius giuris (Hamilton, 1822); Gobiopsis macrostoma Steindachner, 1861; Mugilogobius abei (Jordan et Snyder, 1901); Tridentiger barbatus (Günther, 1861); and Tridentiger trigonocephalus (Gill, 1859). The regression slope values (b) ranged from 2.909 to 3.621. The majority of species had positive allometric or isometric growth pattern with b ≥ 3, except for only one species (G. giuris) which had a negative allometric growth with b = 2.909. This study provided the first LWR information of four gobies that have not been reported in FishBase yet. Besides, the reference for LWRs of other gobies at an ecologically important area like Ba Lat Estuary is also provided.
Highlights
The length–weight relation (LWR) of fishes is a crucial tool for fishery management, used to quantify the biomass while assessing the population dynamics and inferring the impact of the environment on fish (Tesch 1971; Froese 2006)
A total of 1097 specimens belonging to 3 families (Butidae, Gobiidae, Oxudercidae), and representing 11 species were examined: Butis butis (Hamilton, 1822); Butis koilomatodon (Bleeker, 1849); Acentrogobius moloanus (Herre, 1927); Acentrogobius viridipunctatus (Valenciennes, 1837); Apocryptodon madurensis (Bleeker, 1849); Aulopareia unicolor (Valenciennes, 1837); Glossogobius giuris (Hamilton, 1822); Gobiopsis macrostoma Steindachner, 1861; Mugilogobius abei (Jordan et Snyder, 1901); Tridentiger barbatus (Günther, 1861); and Tridentiger trigonocephalus (Gill, 1859)
Present study represents the first reference on LWRs for these four species
Summary
The length–weight relation (LWR) of fishes is a crucial tool for fishery management, used to quantify the biomass while assessing the population dynamics and inferring the impact of the environment on fish (Tesch 1971; Froese 2006). The body condition that reflects the relative wellness of fish populations in a given environment can be estimated from the LWR (Froese 2006). The Ba Lat Estuary, composed of well-developed mangrove forests of Xuan Thuy National Park and Tien Hai Wetland Nature Reserve, is an estuary with diverse biotopes. It is the habitat for many wild species, including some rare migration birds and many fishes (Hoang et al 2013). Despite this importance, there is a lack of informa-
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