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Changes in Patterns of Seasonality Shown by Migratory Fish under Global Warming: Evidence from Catch Data of Taiwan’s Coastal Fisheries

Author

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  • Ching-Hsien Ho

    (Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan
    Department of Global Agricultural Sciences, Tokyo University, 7-3-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan)

  • Hsueh-Jung Lu

    (Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan
    Center of Excellence for the Oceans, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan)

  • Jia-Sin He

    (Coastal and Offshore Resources Research Center, Fisheries Research Institute, Council of Agriculture, No. 6, Yugang N. 3rd Rd., Cianjhen District, Kaohsiung 80672, Taiwan)

  • Kuo-Wei Lan

    (Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan)

  • Jyun-Long Chen

    (Marine Fisheries Division, Fisheries Research Institute, Council of Agriculture, No.199, He 1st Rd, Keelung 20246, Taiwan)

Abstract

In this study, we analyzed the fish species composition data of coastal capture fisheries in Taiwan between 1963 and 2010. The purpose of the analysis was to understand the long-term changes in marine ecosystems. A ratio-to-moving average method was used in conjunction with adjusted seasonal indices to determine the seasonality of individual catch items and to examine the trends shown by the species with the same seasonality. Over the 48-year timespan of the data, 31 species, i.e. , 64% of the total number of species, were identified as seasonal migrants. The catch ratio for species showing a single peak in the spring increased steadily over time; however, those species with a single peak in the winter decreased. The catch ratio for those species with dual peaks in both summer and fall varied greatly before 1978. Increasing trends began in the 1980s and accelerated until 1998. As a result of this increase, the previous concentration of the fishing season in the winter months became highly diffuse. Additionally, the winter and/or spring species continued to decrease year after year as the summer and/or autumn species gradually came to dominate the catch. This change in fishing seasonality is likely not an anthropogenic effect. However, the change coincides with trends in sea surface temperature fluctuations. Such variation may not only cause structural change in marine ecosystems but can also significantly impact the economy and the livelihoods of those associated with the fishing trade.

Suggested Citation

  • Ching-Hsien Ho & Hsueh-Jung Lu & Jia-Sin He & Kuo-Wei Lan & Jyun-Long Chen, 2016. "Changes in Patterns of Seasonality Shown by Migratory Fish under Global Warming: Evidence from Catch Data of Taiwan’s Coastal Fisheries," Sustainability, MDPI, vol. 8(3), pages 1-13, March.
    • Handle: RePEc:gam:jsusta:v:8:y:2016:i:3:p:273-:d:65911
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    References listed on IDEAS

    as
    1. Kuo-Wei Lan & Ming-An Lee & Chang Zhang & Pei-Yuan Wang & Long-Jing Wu & Kuo-Tien Lee, 2014. "Effects of climate variability and climate change on the fishing conditions for grey mullet (Mugil cephalus L.) in the Taiwan Strait," Climatic Change, Springer, vol. 126(1), pages 189-202, September.
    2. Kuo-Wei Lan & Ming-An Lee & Chang Zhang & Pei-Yuan Wang & Long-Jing Wu & Kuo-Tien Lee, 2014. "Erratum to: Effects of climate variability and climate change on the fishing conditions for grey mullet (Mugil cephalus L.) in the Taiwan Strait," Climatic Change, Springer, vol. 127(3), pages 577-578, December.
    3. Chang, Yi & Lee, Ming-An & Lee, Kuo-Tien & Shao, Kwang-Tsao, 2013. "Adaptation of fisheries and mariculture management to extreme oceanic environmental changes and climate variability in Taiwan," Marine Policy, Elsevier, vol. 38(C), pages 476-482.
    4. Igor Belkin & Ming-An Lee, 2014. "Long-term variability of sea surface temperature in Taiwan Strait," Climatic Change, Springer, vol. 124(4), pages 821-834, June.
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    Cited by:

    1. Ching-Hsien Ho & Huu-Sheng Lur & Ming-Hwi Yao & Fang-Ching Liao & Ying-Ting Lin & Nobuyuki Yagi & Hsueh-Jung Lu, 2018. "The impact on food security and future adaptation under climate variation: a case study of Taiwan’s agriculture and fisheries," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 23(3), pages 311-347, March.

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