Based on the Saroma Lake experience, this chapter will provide potential initiatives to help develop a pathway for linking fisheries management to risk reduction. Permanent or long-term residency can allow them to interpret concerns of the fishers and act in a leading role in the coordination of adaptive fisheries development. The employed researchers work on problems of interest to the fishers and search workable the solutions. The system not only ensures a holistic approach to respond to changes in the lake ecosystem, but also reduces a range of risks through active use of scientific knowledge by employing full-time researchers in their structure as well as strengthening interactions between fishers and outside researchers. The fishers united together and built an integrated body, leading them to achieve cooperative fishery governance system. The case study reveals that innovative efforts performed by the fishers and researchers have been made by applying community-based and scientific-oriented fisheries management. Changes in temperature are likely to impact negatively on the ice-covered ecosystem and fishing production in the lake where the fishers need to adapt to the impacts. Saroma Lake is the southernmost area of seasonal sea ice distribution in the northern hemisphere. This chapter presents a case study of Saroma Lake fisheries by highlighting adaptive responses to risk reduction coupled with climate change. Monitoring ice conditions should be considered when developing plans and management strategies for scallop aquaculture in Saroma Lake. In addition, extreme climate events could cause water temperature anomalies (as in 2015) which are unfavourable for scallop growth. Ice coverage variations show a strong correlation with water temperature and spring phytoplankton blooms, which are the two most important environmental factors for scallop growth. The results indicated that EAM strongly influenced the ice coverage variation in Saroma Lake through their effects on temperature during winter. Daily ice conditions were detected using Moderate Resolution Imaging Spectroradiometer false colour images and an unsupervised classification method. Therefore, this study integrated data from satellite remote sensing, buoys, and in situ observations with climatic events to investigate the impact of ice coverage variations on scallop growth in Saroma Lake between 20. However, over the past decade, Saroma Lake frequently has not been completely covered by ice in winter, and the production of Japanese scallops has shown significant changes. Under conditions of adequate food and appropriate temperature, scallops grow well from the time of ice melting in April to harvesting starting in July. Saroma Lake is the southernmost lagoon exhibiting seasonal sea ice coverage in the Northern hemisphere and one of the most important aquaculture areas for Japanese scallops (Mizuhopecten yessoensis). These results show the phytoplankton condition that could be expected during winter and spring as global warming progresses. Its duration was obviously longer than that of the spring bloom, which is typically about one month.
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![residence les hesperides arcachon residence les hesperides arcachon](https://media.sudouest.fr/12000698/1000x500/libournais-b3b41f7aefbd4c7e953e85d69e31cc81-114520-ph0.jpg)
This early spring bloom could extend into the ordinary spring bloom period. The maximum primary production of 786 mgC m−2 day−1 and the maximum Chl a-specific primary production, an index of the phytoplankton growth rate, were also found in March. The maximum chlorophyll-a (Chl a) concentration of about 10 mg m−3 was observed in March, and was similar to the level of 5–20 mg m−3 previously reported for the ordinary spring bloom in Saroma-ko Lagoon. This early spring bloom seemed to have started in the latter part of January, and lasted for about three months. A bloom of large diatoms was observed in the ice-free area between February and April. This condition is considered to be a result of the progression of global warming. Saroma-ko Lagoon, the largest body of water that has complete ice coverage during winter in Japan, was not completely covered by ice in the winter of 2009.