Hydrobiology of a flooding ecosystem, Lake Chenhu in Hanyang, Hubei, with preliminary estimation of its potential fishery production capacity

Liang, Yantao; Ji, Wang; Chuanlin, HU

doi:10.1007/bf02846563

Cited by 9 publications

(1 citation statement)

References 2 publications

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“…f. *Mean caloric value derived from de la Cruz (1983). g. *Wet weight caloric value recalculated from Yanling et al (1988) using energy conversion factor of 4.2 kcal g )1 dry weight suggested by Leith and Whittaker (1975) for wetland vegetation.…”

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The role of a freshwater tidal area with controlled reduced tide as feeding habitat for European eel (Anguilla anguilla, L.)

Liefferinge

Dillen

Ide

et al. 2012

Journal of Applied Ichthyology

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Summary Implementation of the Controlled Reduced Tide (CRT) technique could increase the total surface of tidal freshwater marshes in Europe and ease implementation of restoration projects in coastal defense and riverine ecosystems. The goal was to determine whether a regularly flooded area connected to a freshwater tidal river could act as an important foraging area for European eel, and if so, to what extent the diet of eels in this flooding area differed from that of eels foraging in the river itself. The stomach contents of eels from the River Schelde were compared with eels from the Lippenbroek, an adjacent CRT area. Prey diversity (H′) of individual eels was about four times higher in the Lippenbroek than in the River Schelde. Moreover, 12 prey categories in eel stomachs from the Lippenbroek were found whereas only three categories were retrieved from eels in the River Schelde. In the Lippenbroek, eels fed on terrestrial organisms (lumbricids, caterpillars and other insects), but also on fish and fish eggs and to a lesser extent on other aquatic prey (Lumbricullidae, chironomids and Hirudinea). In contrast, eels from the main river fed mainly on tubificids, fish, and some gammarids. Consequently, eels in the Schelde estuary are opportunistic feeders, but with a preference for large benthic prey. The number and weight of aquatic organisms ingested by eels in the Lippenbroek is not significantly different from the River Schelde. However, eels foraging in the Lippenbroek area had consumed significantly more terrestrial prey. Furthermore the total caloric value estimated for the ingested prey of eels from the Lippenbroek (derived from the literature) was about twice as high as that for eels from the River Schelde. While the condition index remained inconclusive, an Ancova revealed that eels captured in the Lippenbroek were significantly heavier for a given length than eels captured in the Schelde. The study showed that with a controlled reduced tide to restore lateral connectivity of large tidal rivers with their adjacent floodplains, high quality habitats for the European eel are created. These measures could significantly contribute to the production of eels in better condition, which have better chances to reproduce successfully. Hence, wetland restoration could enhance the recovery of the European eel stocks.

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confidence: 99%

The role of a freshwater tidal area with controlled reduced tide as feeding habitat for European eel (Anguilla anguilla, L.)

Liefferinge

Dillen

Ide

et al. 2012

Journal of Applied Ichthyology

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Seston in a seasonally flooded lake of the central Changjiang River (China)

Wen

1992

Hydrobiologia

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Seston was studied during inundation in a seasonally flooded lake of Changjiang River system (Lake Chenhu, Hanyang, P.R. China) . Particulate organic matter (POM), particulate inorganic matter (PIM), particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations were highest upon initial inflow of river water, as a result of the riverine transport of allochthonous seston into the lake, and during the initial draining phase, coinciding with the postflood development of phytoplankton biomass and accumulation of detritus from the decomposition of the inundated vegetation grown during the preceding period of exposure . However seston concentrations were lowest shortly after the termination of flood inflow, presumably due to sedimentation and river water dilution . Seston food quality, based on POM : PIM, C : N and Algal-AFDW : POM ratios, was higher during the early high water phase than during the filling and draining phases .

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Distribution of the Macroinvertebrate Communities in the Xiangxi River System and Relationships with Environmental Factors

Qu¹,

Tang²,

Xie³

et al. 2005

Journal of Freshwater Ecology

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Hydrobiology of a flooding ecosystem, Lake Chenhu in Hanyang, Hubei, with preliminary estimation of its potential fishery production capacity

Cited by 9 publications

References 2 publications

The role of a freshwater tidal area with controlled reduced tide as feeding habitat for European eel (Anguilla anguilla, L.)

The role of a freshwater tidal area with controlled reduced tide as feeding habitat for European eel (Anguilla anguilla, L.)

Seston in a seasonally flooded lake of the central Changjiang River (China)

Distribution of the Macroinvertebrate Communities in the Xiangxi River System and Relationships with Environmental Factors

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