Distribution of suckermouth armoured catfishes (Siluriformes Loricariidae) across the salinity gradient of the Mekong Delta Vietnam

Lai Quan Tung, . and Orfinger Alexander B., . and Tran Thai Thanh, . and Le Nguyen Khoa, . Distribution of suckermouth armoured catfishes (Siluriformes Loricariidae) across the salinity gradient of the Mekong Delta Vietnam. pp. 300-306. ISSN 0116-6514

It has been suggested that suckermouth armoured catfishes of the genus Pterygoplichthys Gill 1858 (Siluriformes: Loricariidae) might use brackish water systems as a means to disperse between freshwater bodies. This study aimed to explore the dynamics of Pterygoplichthys spp. distribution in relation to salinity gradient and provide population characteristic data namely length weight condition factors by sampling the Co Chien and Ham Luong rivers Mekong Delta Vietnam. Contrary to initial predictions there was neither evidence for the presence of Pterygoplichthys spp. in brackish waters in the Mekong Delta nor for the fishes' colonisation of an area that fluctuates seasonally between freshwater and brackish water. Length-weight relationship and condition factor of the fishes demonstrated negative allometric growth and good physiological condition. The findings from this study could help fishery managers to map out the distribution of Pterygoplichthys spp. in the Mekong Delta as well as raise awareness on the perils of releasing aquarium pets.

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Abstract

It has been suggested that suckermouth armoured catfishes of the genus Pterygoplichthys Gill 1858 (Siluriformes: Loricariidae) might use brackish water systems as a means to disperse between freshwater bodies. This study aimed to explore the dynamics of Pterygoplichthys spp. distribution in relation to salinity gradient and provide population characteristic data namely length weight condition factors by sampling the Co Chien and Ham Luong rivers Mekong Delta Vietnam. Contrary to initial predictions there was neither evidence for the presence of Pterygoplichthys spp. in brackish waters in the Mekong Delta nor for the fishes' colonisation of an area that fluctuates seasonally between freshwater and brackish water. Length-weight relationship and condition factor of the fishes demonstrated negative allometric growth and good physiological condition. The findings from this study could help fishery managers to map out the distribution of Pterygoplichthys spp. in the Mekong Delta as well as raise awareness on the perils of releasing aquarium pets.

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Item Type:	Article
AGROVOC Term:	Siluriformes
AGROVOC Term:	Loricariidae
AGROVOC Term:	Fishes
AGROVOC Term:	Freshwater fisheries
AGROVOC Term:	Distribution
AGROVOC Term:	Salinity
AGROVOC Term:	Sampling
AGROVOC Term:	Brackish water
AGROVOC Term:	Freshwater
AGROVOC Term:	Allometry
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9298

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