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Reproductive habitat use, body-size structure and spawning season of Cobitis minamorii minamorii in paddy fields and ditches

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Abstract

We surveyed the reproductive ecology of Cobitis minamorii minamorii in paddy fields and ditches. The spatial distribution of females in the spawning season differed from that in the non-spawning season, even in short ditches. Eggs were collected in both ditches and paddy fields, unlike an earlier study demonstrating that no eggs were collected in ditches. The frequency distributions of standard body lengths of males and females were unimodal and bimodal, respectively. The females with a large standard body length were expected to be gravid with higher probability in May.

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Acknowledgments

We are deeply appreciative of N. Ichikawa for his advice about this study site. This study was partly supported by JSPS KAKENHI Grant Number KB17K07273 and KB19J23611. All surveys complied with the current laws of the country in which they were conducted.

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Authors and Affiliations

  1. Graduate School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan

    Kiyohito Morii & Daisuque Kitano

  2. Onokaminocho, Kyoto Kita-ku, Kyoto, 601-0133, Japan

    Ryosuke Kanai

  3. School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan

    Koh-Ichi Takakura

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  1. Kiyohito Morii
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  2. Daisuque Kitano
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  3. Ryosuke Kanai
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  4. Koh-Ichi Takakura
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Correspondence to Kiyohito Morii.

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Morii, K., Kitano, D., Kanai, R. et al. Reproductive habitat use, body-size structure and spawning season of Cobitis minamorii minamorii in paddy fields and ditches. Ichthyol Res 69, 182–188 (2022). https://doi.org/10.1007/s10228-021-00826-1

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  • DOI: https://doi.org/10.1007/s10228-021-00826-1

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