Effect of Larval Density on Temporal Variation in Life Cycle Patterns of Chironomus plumosus(L.)(Diptera: Chironomidae) in the Profundal Zone of Eutrophic Lake Suwa during 1982-1995.

亮治, 中里; 公男, 平林

doi:10.3739/rikusui.59.13

Cited by 13 publications

(5 citation statements)

References 17 publications

(7 reference statements)

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“…In Lake Izunuma, peak emergence was observed from late April to early May. In Japan, emergence of C. plumosus can occur two or three times a year (Nakazato and Hirabayashi 1998). Hence, at least a second emergence would occur from August to October.…”

Section: Discussionmentioning

confidence: 98%

Seasonal increase of methane in sediment decreases δ13C of larval chironomids in a eutrophic shallow lake

et al. 2011

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Recent studies have shown that larval chironomids assimilate 13 C-depleted carbon derived from biogenic methane by feeding on methane-oxidizing bacteria (MOB). The dietary contribution of MOB is known to be maximized in the autumn overturn period or winter in eutrophic dimictic lakes due to the increase of MOB biomass following the supply of oxygenated water, but in polymictic lakes, such seasonal variability has not been revealed. We investigated the seasonal patterns of larval d 13 C and methane concentrations in the sediment of a eutrophic polymictic lake, Izunuma, Japan. Larval d 13 C decreased in late summer and autumn. Methane concentrations above a 6 cm depth peaked in late summer or autumn, while those in the 10-11-and 20-21-cm layers peaked in October. Negative correlations between methane concentrations in the 5-6/10-11-cm layers and larval d 13 C were found. This suggests that an increase in the supply of methane stimulated the activity of MOB in a polymictic lake, where water above the lake bottom rarely became anoxic because of frequent overturn, thus increasing the dietary contribution of MOB to larval chironomids.

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Section: Discussionmentioning

confidence: 98%

Seasonal increase of methane in sediment decreases δ13C of larval chironomids in a eutrophic shallow lake

et al. 2011

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“…A particularly high variability of C. plumosus density was detected in Lake Suwa in Central Japan (maximum depth of 6.8 m and a mean depth of 4 m) during the years from 1982 to 1995, in which its density increased from monthly values of about 100 to 40,000 ind. m −2 [33]. Biometries of the C. plumosus population, consisting of 9264 identified larvae, showed the almost exclusive presence of mature larvae (instar IV, 99.26%).…”

Section: Resultsmentioning

confidence: 98%

“…On the other hand, the presence of C. plumosus as dominant species among the chironomid community is frequent in the central zone of shallow lakes, compared to the littoral zone of the same [39], although the extent of dominance of this species around Lake Trasimeno is particularly clear and even increasing over the past 20 years. For example, C. plumosus was one of the most predominant species in the chironomid community during a 13-year study at Lake Suwa in Central Japan [33] and in the shallow Zegrzy ǹski dam reservoir (Central Poland) at the station with about 5 m of depth during a 5-years survey (from 1993 to 2001); it showed densities of about an order of thousands ind. m −2 [14].…”

Section: Resultsmentioning

confidence: 99%

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Role of Chironomus plumosus (Diptera, Chironomidae) Population in the Central Zone of the Shallow Lake Trasimeno (Italy)

et al. 2023

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Adult swarms of non-biting pestiferous midges (Chironomidae: Diptera), primarily Chironomus plumosus, prevail over and around Lake Trasimeno (Italy) during the summer season. The current field survey (2018–2021, 33 sampling occasions) was carried out in the central area of the lake. It revealed a macrobenthic community consisting of Chironomidae (40.72%) and Oligochaeta (59.23%). Chironomus plumosus was the dominant chironomid species (98.84%). A previous survey (2000–2002, 11 sampling occasions) had highlighted a similar community, although C. plumosus had a lower density, comprising a maximum of 295.0 ind. m−2. This density was five times lower than the maximum densities of 2018–2021. A survey (2018–2021, 58 sampling occasions) conducted in the littoral zone revealed much greater chironomid biodiversity, with C. plumosus abundance of only 24.35% among all chironomids. This species showed an average density (88.1 ind. m−2) five times lower than its density (467.9 ind. m−2) in the central zone (2018–2021). Therefore, the central area of the lake, constituting about 90% of its total surface area, is the main region for the origin of C. plumosus adults and, consequently, during the summer months, it is the primary source of the annoying swarms that affect residents and tourists of the lake vicinity.

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“…This phenomenon is caused by the lack of permanent oxygen depletions (guaranteed by wind-mixing and water flow) and by constant food supply (sedimenting tripton, brought by the rivers feeding the reservoirs) (Dusoge et al 1985, Bubień 1989, Kajak and Prus 2003. However, large fluctuations of Chironomus abundance in shallow dam-reservoirs and lakes are observed on seasonal and year-to-year time scales (Sokolova 1983, Armitage et al 1995, Kangur 1989, Kajak 1997, Nakazato and Hirabayashi 1998, Kajak and Prus 2003.…”

Section: Introductionmentioning

confidence: 99%

The dependencies between the abundance of Chironomus f. l. plumosus and bream (Abramis brama) net catches in a lowland reservoir (Zegrzyński Reservoir, central Poland)

Prus

2009

Oceanological and Hydrobiological Studies

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Chironomus f. l. plumosus larvae, a valuable food of bream (Abramis brama (L.)), dominate in the benthos of the extra-littoral zone of the shallow, lowland, eutrophic Zegrzyński Reservoir. Bream is the dominant fish species in this reservoir, making up to 80% of total net catches. During eight years of studies, very regular Chironomus population dynamics were noted in the lotic part of the central, broad basin of the reservoir. There were usually two peaks of the abundance: the higher one in spring, and the much lower one in late summer. reservoir in particular years. The total bream catch per year in the reservoir studied also correlated positively with the average yearly abundance of Chironomus. The correlation between Chironomus abundance and bream occurrence (measured by commercial net catches) in the reservoir studied suggests that this environment is used by bream mainly as a feeding ground. In the years with a low spring Chironomus peak of abundance, the bream leave the reservoir, searching for food in its inflows -two large, lowland rivers. This corresponds to much lower catches noted in the reservoir in the years of low Chironomus abundance.

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Effect of Larval Density on Temporal Variation in Life Cycle Patterns of Chironomus plumosus(L.)(Diptera: Chironomidae) in the Profundal Zone of Eutrophic Lake Suwa during 1982-1995.

Cited by 13 publications

References 17 publications

Seasonal increase of methane in sediment decreases δ13C of larval chironomids in a eutrophic shallow lake

Seasonal increase of methane in sediment decreases δ13C of larval chironomids in a eutrophic shallow lake

Role of Chironomus plumosus (Diptera, Chironomidae) Population in the Central Zone of the Shallow Lake Trasimeno (Italy)

The dependencies between the abundance of Chironomus f. l. plumosus and bream (Abramis brama) net catches in a lowland reservoir (Zegrzyński Reservoir, central Poland)

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