Trophic position and growth stages of Caddisfly (Stenopsyche marmorata Navas) larvae in the Echi River, Japan

Fine-scale dispersal in a stream caddisfly inferred from spatial autocorrelation of microsatellite markers

“…In a study based on collections with 1 light trap set 10 m from the stream, Nishimura (1966) reported individuals of both sexes at the trap, suggesting at least some propensity for lateral dispersal. Larval S. marmorata are net-spinning filter-feeders that capture particulate organic matter and feed on periphyton (Nishimura 1966, Doi et al 2007, Shin et al 2013. Gose (1970) examined 3 populations in Japan and found that S. marmorata was univoltine in colder areas and bivoltine in warmer areas.…”

A comparison of freeze‐drying and oven‐drying preparation methods for bulk and compound‐specific carbon stable isotope analyses: examples using the benthic macroinvertebrates Stenopsyche marmorata and Epeorus latifolium

“…For instance, isotope mixing models for evaluating the contribution of different food sources to the consumer's diet would improve the accuracy of estimates even when there is a large difference in δ 13 C values between the two dietary sources . The relatively low δ 13 C values of S. marmorata compared with E. latifolium samples, in both the bulk samples and the fatty acid samples, are due to assimilation of both periphyton and terrestrial organic carbon in particulate organic matter, since the δ 13 C values of terrestrial plants are generally lower (<ca –27 ‰) than those of periphyton (>ca –25 ‰) in Japanese rivers . In contrast, larger differences (>10 ‰) were observed in the δ 13 C values of fatty acids from terrestrial and aquatic plants than in the bulk δ 13 C values of the same plants .…”

“…The Yasu River has the largest watershed area in the Lake Biwa basin (387 km 2 ), and the sample collection site is characterized by a steep and narrow channel that consists of large cobbles (128–256 mm) and boulders (256–512 mm) and that is partly covered by the tree canopy. S. marmorata is a large filter feeder that digests particulate organic matter, while E. latifolium is a grazer and feeds on periphyton on the riverbed . S. marmorata and E. latifolium are common species that are broadly distributed throughout Japan .…”

Transverse Variation of Food Compositions of &lt;i&gt;Corbicula bivalves&lt;/i&gt; in a Tidal River with Series of Groins

“…The incremental parameter was set to 1%, and the tolerance parameter was initially set at 0.1%. If the mixture isotope values were out of bounds, we increased the tolerance parameter by 0.1% until it reached [11]. In adopting these software, we set the hypothetical food source by giving presumptive 0.8‰ trophic shift in the δ 13 C and 3‰ shift in the δ 13 N [12] between potential food sources and the bivalves.…”