Life history differences of Psilotreta locumtenens (Trichoptera: Odontoceridae) in two reaches of a mountain stream in Korea

Ye Ji Seo, Dong Gun Kim, Min Jeong Baek, Yeon Jae Bae

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    The life history traits of the caddisfly, Psilotreta locumtenensBotosaneanu (Odontoceridae), were studied in two stream reaches with different thermal ranges (main and branch streams) of the Gapyeong Stream, a typical mountain stream located in the central Korean Peninsula. Psilotreta locumtenens larvae were quantitatively sampled monthly from November 2008 to July 2010, and biweekly during the emergence period (late April to early July), using a Surber sampler (30 × 30cm). Adults were quantitatively sampled with a sweep net. Larval density in the main stream (324.21 ± 38.59m-2) was higher than that in the branch stream (60.48 ± 10.86m-2). The larvae hatched in the early summer and overwintered as 5th and 3rd instars in the main and branch streams, respectively. The emergence peak at the main stream was approximately 2 weeks earlier. The sex ratio at both sites was approximately 0.3. The life history in both streams was univoltine. Secondary production in the main stream was much higher than in the branch stream, owing to high larval densities, and the P/B ratios at the two sites were similar. This study demonstrated remarkable differences in larval growth patterns and emergence peaks in P.locumtenens between the two stream reaches due to differences in accumulated degree days (230.30 DD) and other phenological cues such as daily mean threshold water temperature (9°C) during the ascending phase, despite their relatively small mean annual water temperature difference of 0.58°C.

    Original languageEnglish
    Pages (from-to)293-301
    Number of pages9
    JournalEntomological Research
    Volume44
    Issue number6
    DOIs
    Publication statusPublished - 2014 Nov 1

    Bibliographical note

    Publisher Copyright:
    © 2014 The Entomological Society of Korea and Wiley Publishing Asia Pty Ltd.

    Keywords

    • Caddisfly
    • Degree days
    • Emergence
    • Phenology
    • Secondary production

    ASJC Scopus subject areas

    • Insect Science

    Fingerprint

    Dive into the research topics of 'Life history differences of Psilotreta locumtenens (Trichoptera: Odontoceridae) in two reaches of a mountain stream in Korea'. Together they form a unique fingerprint.

    Cite this