Changes in the fish catches during a trial opening of sluice gates on a run‐of‐the river reservoir in Thailand

Jutagate, Tuantong; Krudpan, C.; Ngamsnae, P.; Lamkom, Thanathip; Payooha, Kanjana

doi:10.1111/j.1365-2400.2004.00419.x

Cited by 29 publications

(22 citation statements)

References 6 publications

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“…Nevertheless, the otolith Sr-Ba profiles of the two regions considerably varied and overlapped, suggesting that the Mun fish had migrated as extensively as did MM fish through the sluice gates of the Pak Mun hydroelectric dam, presumably from MM [58]. This study reaffirmed the importance of opening the sluice gates during the flood season to conserve fish species diversity and local fisheries [37], [38].…”

Section: Discussionmentioning

confidence: 56%

Potential Effects of Hydroelectric Dam Development in the Mekong River Basin on the Migration of Siamese Mud Carp (Henicorhynchus siamensis and H. lobatus) Elucidated by Otolith Microchemistry

et al. 2014

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The migration of Siamese mud carp (Henicorhynchus siamensis and H. lobatus), two of the most economically important fish species in the Mekong River, was studied using an otolith microchemistry technique. Fish and river water samples were collected in seven regions throughout the whole basin in Thailand, Laos and Cambodia over a 4 year study period. There was coherence between the elements in the ambient water and on the surface of the otoliths, with strontium (Sr) and barium (Ba) showing the strongest correlation. The partition coefficients were 0.409–0.496 for Sr and 0.055 for Ba. Otolith Sr-Ba profiles indicated extensive synchronized migrations with similar natal origins among individuals within the same region. H. siamensis movement has been severely suppressed in a tributary system where a series of irrigation dams has blocked their migration. H. lobatus collected both below and above the Khone Falls in the mainstream Mekong exhibited statistically different otolith surface elemental signatures but similar core elemental signatures. This result suggests a population originating from a single natal origin but bypassing the waterfalls through a passable side channel where a major hydroelectric dam is planned. The potential effects of damming in the Mekong River are discussed.

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Section: Discussionmentioning

confidence: 56%

Potential Effects of Hydroelectric Dam Development in the Mekong River Basin on the Migration of Siamese Mud Carp (Henicorhynchus siamensis and H. lobatus) Elucidated by Otolith Microchemistry

et al. 2014

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“…Although the scheme is not tested statistically here, some of the references we cite do, such as Aarts et al (2004) and descriptions of species assemblage changes due to flow variations in poldered areas on the Bangladesh floodplain (Halls, 1998), changes in dominance of floodplain and river spawning guilds during the Sahelian drought (Dansoko et al, 1976), and the failure of various anadromous and potamodrous migratory guilds in response to damming in many areas of the world. Furthermore the scheme may be applied retroactively to historical changes in river systems following changes in flow regime, such as the restoration of many eupotamonic lithophils and pelagophils in the Mun River, Thailand, after the gates of the Pak Mun dam were opened to allow flows during the breeding season of the fish (Jutagate et al, 2005). The scheme is also well adapted to holistic environmental flow assessment framework methodologies such a DRIFT King et al, 2003) that rely on limited knowledge and expert opinion rather than detailed local study.…”

Section: Discussionmentioning

confidence: 99%

Fish environmental guilds as a tool for assessment of ecological condition of rivers

Welcomme

Winemiller

Cowx

2006

River Research & Apps

201

196

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The form, hydrology and functioning of rivers worldwide have been increasingly modified by a range of human activities. The impacts of these changes on the fish faunas of rivers need to be assessed for biodiversity conservation and fisheries management. Reliable and cost effective indicators of fish assemblage responses to hydrological, morphological and functional changes in a river are required. Given the large number of fish species present in many rivers, reliance on a single indicator species is problematic. The present paper proposes the use of environmental guilds for this purpose. Building on prior studies, we propose a series of environmental guilds based on common patterns of response by fish species to changes in river flow and geomorphology. A general framework consisting of two upland stream guilds, three lowland lentic guilds, four lowland lotic guilds, two generalist guilds and five estuarine guilds is proposed. Considering the large numbers of species present in many river and estuarine systems and the flexibility of their behaviour, many species will be difficult to classify. Further development of the proposed guild classification at the level of individual basins is anticipated, particularly in river systems with highly variable hydrology and many opportunistic species. Nevertheless, this general scheme would be easily and rapidly applied to a wide variety of local circumstance, as well as to the description of the general trends in fish population and assemblage structure occurring during river development.

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“…2008). The obvious example in Thai reservoirs is the absence of Pangasiid and some Silurid fishes, except when they are stocked (Jutagate et al. 2005).…”

Section: Discussionmentioning

confidence: 99%

Variations, trends and patterns of fish landings in large tropical reservoirs

Jutagate

Srichareondham²,

Lek

et al. 2012

Lakes & Reservoirs

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Temporal variations of fish yields in four major reservoirs in Thailand (Ubolratana; Sirindhorn; Srinakarin; Vajiralongkorn) were investigated with the use of long-term fish landing data ( ‡20 years). The long-term variations in fish yield, measured as the coefficient of variation of yearly yield, ranged mostly between 50% and 100%. For short-term variations, the means of the relative variation (85%) were larger than the absolute variation (63%). This finding indicates that short-term variations were inversely related to fish yield and that a higher uncertainty occurs when fish catches are low. The stocked exotic species exhibited higher variations than the indigenous species. The trend analyses indicated some species had sharply declined fish landings, while some species were quite stable (i.e. reservoir-adapted species). Stocked species tended to increase in relatively shallow reservoirs, compared to the deep reservoir. Fish landing data for each reservoir were patternized, using the self-organizing map, indicating temporal trends of chronological order. The differences among clusters in each reservoir were with respect to the weight of each species in the fish landings in each year, and temporal changes in species composition in the reservoirs, which would primarily be attributed to the environmental changes followed by anthropogenic pressures. The mean trophic level (s) fluctuated, resulting from changes in species composition and weight of fish landing, as well as fish stocking programmes.

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Changes in the fish catches during a trial opening of sluice gates on a run‐of‐the river reservoir in Thailand

Cited by 29 publications

References 6 publications

Potential Effects of Hydroelectric Dam Development in the Mekong River Basin on the Migration of Siamese Mud Carp (Henicorhynchus siamensis and H. lobatus) Elucidated by Otolith Microchemistry

Potential Effects of Hydroelectric Dam Development in the Mekong River Basin on the Migration of Siamese Mud Carp (Henicorhynchus siamensis and H. lobatus) Elucidated by Otolith Microchemistry

Fish environmental guilds as a tool for assessment of ecological condition of rivers

Variations, trends and patterns of fish landings in large tropical reservoirs

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