Importance of instream cover for young masu salmon, <i>Oncorhynchus masou</i>, in autumn and winter

Miyakoshi, Yasuyuki; Hayano, Hirofumi; Omori, Hajime; Nagata, Mitsuhiro; Irvine, James R.

doi:10.1046/j.1365-2400.2002.00300.x

Cited by 8 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(Freshwater type), indicating that the three fish species preferring low current velocity in winter changed their habitat preferences from autumn to winter. Many researchers have found that juvenile salmon select slow current areas with cover, such as submerged grasses or wood, in the winter (Bustard & Narver, 1975;Miyakoshi et al, 2002;Beechie et al, 2005;Nagayama & Nakamura, 2007). The same preference was also shown by O. masou in our study.…”

Section: Effects Of Wood On Fish Assemblage and Physical Environmentsupporting

confidence: 88%

“…Because fish activity is generally limited under low water temperature (Wootton, 1998), the risks associated with predation, energy expenditure, and displacement by freshets potentially increase during the winter (Cunjak, 1996). Juvenile salmon use a low current velocity area with habitat cover to minimize these risks (Bustard & Narver, 1975;Miyakoshi et al, 2002;Beechie et al, 2005;Nagayama & Nakamura, 2007). Some studies found a similar winter habitat selection by non-salmonid species (Cunjak & Power, 1986;Todd & Rabeni, 1989;Carter et al, 2004;Karchesky & Bennett, 2004).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of configuration of instream wood on autumn and winter habitat use by fish in a large remeandering reach

et al. 2011

View full text Add to dashboard Cite

This study examined the effects of the configuration of wood structures on the use of local autumn and winter habitats by fish in a remeandering reach of a large lowland river. Fish diversity was higher at the simple wood-structure (SWS) and the log-jam (LJ) sites than at the no-wood (NW) sites during both seasons. In particular, the diversity at the LJ sites was higher than that at the SWS sites during the winter. The abundance of the four dominant fish species was generally higher at the LJ sites than at the NW sites during both seasons. The SWS and LJ sites were characterized by greater depths, finer bed materials, and more diverse flow conditions during the autumn. During the winter, the LJ sites were characterized by slower currents and finer bed materials. These habitat features satisfied the various habitat requirements of the fish observed in our study reach; during the autumn, areas with fast and slow currents were favorable for juvenile salmon, silt and sand bed materials for lamprey, and deep areas for one species of goby, while slow currents were critical in the winter for abovementioned fish species. Engineered log jams were also effective in supporting the colonization of fish during both seasons. These findings suggest that a larger and more complex wood structure, particularly log jams, plays important roles in creating local habitats suitable for various fish species during the autumn and winter and in preserving fish abundance and diversity in large lowland rivers.

show abstract

Section: Effects Of Wood On Fish Assemblage and Physical Environmentsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Effects of configuration of instream wood on autumn and winter habitat use by fish in a large remeandering reach

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Cover was the main parameter structuring fish assemblages. The importance of this variable has been highlighted in other studies (Miyakoshi et al, 2002;Penˇa´z et al, 2002), since it is essential at given times and phases of fish life-cycles (foraging, spawning, nursery, resting, hiding, wintering, etc.). For example, in a study designed to test the effect of induced hydropeaking on the use of habitat by brown trout, it was found that fish were not washed out by sudden high flows, provided that coarse substrate supplying cover was present (Heggenes, 1988).…”

Section: Discussionmentioning

confidence: 95%

Effects of small hydropower plants on fish assemblages in medium-sized streams in central and northern Portugal

Santos¹,

Ferreira²,

Pinheiro

et al. 2006

Aquatic Conserv: Mar. Freshw. Ecosyst.

View full text Add to dashboard Cite

ABSTRACT1. Over the last decade the development of small hydropower projects has been one of the most active areas of the energy sector. One of the main environmental challenges faced by such projects is related to fish passage.2. The impact of 18 small hydropower plants (SHPs) with distinct levels of fish-pass effectiveness was investigated in the summers of 1998 and 1999 by comparing fish assemblage composition and structure at 36 sites, above and below SHPs.3. With regard to effectiveness, it was estimated that eight (44.4%) of the surveyed passage facilities were suitable for target species, whereas the remaining 10 (55.6%) were considered unsuitable. In neither case did the composition of fish assemblages upstream and downstream from SHPs differ significantly, while assemblage similarity was relatively high.4. Multivariate techniques identified cover, depth and coarse substrate as the main parameters structuring fish assemblages. It is suggested that these variables have created a rich, patchy, heterogeneous habitat, thereby providing satisfactory resources and favourable conditions required by fish and contributing to the maintenance of assemblages.5. Although populations of some species that occurred both upstream and downstream from SHPs have developed differences in their size structures, SHP-induced fragmentation of fish populations may not necessarily result in genetic divergence among semi-isolated populations.

show abstract

“…In general, overwintering salmonids move downstream, form aggregations (e.g., Jakober et al 1998;Brown 1999), and show concealment behaviors (e.g., Thurow 1997;Meyer and Gregory 2000). As with other salmonids, juvenile masu salmon often move to low water velocity areas with shelter as water temperature decreases (Miyakoshi et al 2002(Miyakoshi et al , 2007Watanabe et al 2006;Nagayama and Nakamura 2007). In accordance with the present results, Inoue and Ishigaki (1968) found that juvenile masu salmon gathered in a tributary where water temperature was relatively high during the winter.…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in stream salmonid population densities in two tributaries of a boreal river in northern Japan

Morita¹,

Morita²,

Nagasawa³

2011

Ichthyol Res

View full text Add to dashboard Cite

We examined seasonal changes in population densities of stream salmonids (masu salmon Oncorhynchus masou, white-spotted charr Salvelinus leucomaenis, and rainbow trout O. mykiss) in two tributaries of the Shoro River, eastern Hokkaido, Japan. In one small tributary, water temperature was relatively high during the winter, and populations of salmon and trout increased through immigration at this time of the year, becoming dominant components of the salmonid assemblage; the density of charr in this stream decreased during the winter, but charr was dominant during the summer. In another medium-sized tributary, the water temperature fell to close to 0°C during the winter, and densities of salmon and charr decreased in this season, through emigration; trout were very rare in this stream. Seasonal patterns of stream salmonid densities vary among species and between localities, resulting in seasonal changes in species composition. For a comprehensive understanding of population processes, a whole-river survey across seasons will be necessary.

show abstract

Importance of instream cover for young masu salmon, Oncorhynchus masou, in autumn and winter

Cited by 8 publications

References 34 publications

Effects of configuration of instream wood on autumn and winter habitat use by fish in a large remeandering reach

Effects of configuration of instream wood on autumn and winter habitat use by fish in a large remeandering reach

Effects of small hydropower plants on fish assemblages in medium-sized streams in central and northern Portugal

Seasonal changes in stream salmonid population densities in two tributaries of a boreal river in northern Japan

Contact Info

Product

Resources

About