A transdisciplinary research of coastal fisheries co-management: the case of the hairtail Trichiurus japonicus trolling line fishery around the Bungo Channel, Japan

Makino, Mitsutaku; Watari, Shingo; Hirose, Takehiro; Oda, Kentaro; Hirota, Masahito; Takei, Atsushi; Ogawa, Masanori; Horikawa, Hiroshi

doi:10.1007/s12562-017-1141-x

Cited by 11 publications

(11 citation statements)

References 34 publications

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“…Considering this, one important area that JFRA (and any other marine/fisheries research organizations) needs is to reconnect science and public interest through strengthening human dimension works and science communication. Even though our analysis of the last 15 years' performance of JFRA did not detect it, there are a few transdisciplinary works among JFRA multidisciplinary scientists, Government (particularly Fisheries Agency), and resource users (fishers) Makino et al, 2017;(Watari et al, 2017;Hirose et al, 2017). It usually involves prefectural fisheries institutions as key counterparts which can function as knowledge translators (Sato et al, 2018).…”

Section: Discussion and Conclusion 41 Summary Of The Resultsmentioning

confidence: 95%

Science-policy-public interface toward ocean sustainability: An empirical study using legal documents, scientific publications, and public inquiry logs in Japan

Sugimoto

Tajima²,

Sugaya³

et al. 2023

Front. Mar. Sci.

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Many countries have governmental fisheries science organizations, each of which should play a critical role in achieving ocean sustainability by leading the fisheries science in each country’s specific contexts and beyond. In the context of the UN Decade of Ocean Science (UNDOS), understanding the interface of science, policy, and public interest around fisheries is increasingly recognized as critically important for realizing effective knowledge exchange and co-creating desired futures. This study aims to illuminate the interface of the above three facets as a guide to have better outcomes in the UNDOS timeframe. We used a case study of Japan – a country with extensive seafood production and consumption, and analyzed 1) the scientific performance of the Japan Fisheries Research and Education Agency (JFRA), a national fisheries research organization in the country through peer-reviewed papers published by JFRA researchers from 2004–2018, 2) policy needs through annual white papers published by Fisheries Agency from 1989–2018, and 3) public interest around fisheries through public inquiry logs accumulated at JFRA from 2004–2018. The results indicated the following: 1) JFRA was originally a part of fisheries policies, and both science and policy were inherently based on the fisheries practices in the “real world” in Japan. However, over the last fifteen years, the scientific performance has heavily focused on bio-physical dimensions of fisheries such areas as “Stock assessment,” “Fisheries Oceanography,” and “Stock enhancement.” 2) Japanese fisheries policy priority has shifted from relatively simple, straightforward keywords focusing on primary fisheries production (from 1989 to 1998) to more complex, multidimensional fisheries systems, including marine resources, producers, processors, and consumers in/outside of the country (from 2009–2018) over the last three decades. 3) Public fisheries/ocean literacy seems limited, despite the rich history of seafood consumption, cultural bond with fisheries, and inherent close relationship among fisheries science, policy, and resource users. Based on the results, we discuss that JFRA sciences, fisheries policy, and the public are contemporary pursuing different interests. To overcome this situation, one important area that JFRA (and any other marine/fisheries research organizations) needs is to reconnect science and public interest through strengthening human dimension works and science communication. For the public side, literacy development among wider stakeholders is one of the most emergent works to be addressed. This is one of the first case studies of science-policy-public interface through empirical data, particularly with the public inquiry log, and the “non-Western” country case study on this topic. This will encourage other empirical studies from countries with various social/cultural/political backgrounds to enrich the perspective of fisheries science-policy-public interface studies globally.

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Section: Discussion and Conclusion 41 Summary Of The Resultsmentioning

confidence: 95%

Science-policy-public interface toward ocean sustainability: An empirical study using legal documents, scientific publications, and public inquiry logs in Japan

Sugimoto

Tajima²,

Sugaya³

et al. 2023

Front. Mar. Sci.

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“…Although it is difficult to obtain consensus among different types of fisheries working in different areas, early implementation of management strategies like this will ultimately contribute to more rapid recovery and sustainable exploitation of fisheries resources. Using the stock structure and resource management results of this study, we elsewhere discuss the development of effective fishing gear [22] and a transdisciplinary approach to coastal fisheries co-management [23] for improved resource management.…”

Section: Discussionmentioning

confidence: 99%

Stock structure and resource management of hairtail Trichiurus japonicus based on seasonal broods around the Bungo Channel, Japan

et al. 2017

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responsible for decreased landings. Yield and spawning per recruitment analyses indicate current fishing pressure to be higher than several reference points. We suggest that fishing pressure needs to be reduced by at least 20% of the current level for this fishery to remain sustainable, as the projected stock abundance and catch demonstrate that the current fishing pressure is unsustainable. Analysis of time-series data of recruits per spawning revealed spring-brood recruitment to have been strong in year classes 2003 and 2005. Of various options available for improved management of this fishery, we propose that fishing pressure should be reduced in the years following the appearance of strong year classes to increase future biomasses and landings. Keywords Spawning season · Strong year class · Virtual population analysis · Stock management · Stock abundance IntroductionHairtail Trichiurus japonicas is a widely distributed commercially exploited fish species found around Japan and the waters of the Yellow, Bohai, and East China Seas [1]. Several major fishing grounds exist around Japan, including the East China Sea, the western region of the Sea of Japan, and the waters around the Kii and Bungo Channels (Fig. 1). Though large numbers of hairtail were landed from both the East China Sea and western region of the Sea of Japan [2,3] in the 1960s, the annual catch in these areas has decreased since the 1970s. However, landings of hairtail from waters around the Bungo Channel have increased from the 1970s, increasing the importance of these fishing grounds (Fig. 2). Waters within and around the Bungo Channel provide an important hairtail habitat, where most of the life cycle of this Abstract Declines in landings of the hairtail Trichiurus japonicas indicate the need for more effective management of this species. Hairtail spawning peaks occur twice yearly in the Bungo Channel, in spring and autumn. Relationships between hairtail stock and brood seasonality were examined to determine if an association between either and a decline in landings existed. Stock assessments show that the biomass of both spring and autumn hairtail broods from within and around the Bungo Channel are decreasing, with a rapid reduction in spring-brood stock abundance after 2007 largely . The spring brood comprises individuals spawned during the first peak (May-June), and the autumn brood those spawned during the second peak (September-October). In both broods the annual otolith ring forms from June to August, and thus the radius of the first annual ring in the spring brood is greater than that of the autumn brood. Consequently, spawning season can be determined for each fish, even for older individuals, based on the first otolith ring radius [4,5]. This characteristic has also been observed in hairtail from other areas [1,6,7]. Because of decreased winter growth, an age-length relationship using an extended von Bertalanffy growth model that takes seasonal growth variation into consideration using a periodic function is more suitable than a trad...

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“…Thus, there are more than twice as many boxes of king-size hairtail (8 individuals or fewer/box) as mini-size hairtail (21-25 individuals/box) if the same numbers of fish in each size class are caught. Larger hairtail command a higher price; for example, the price of a box of king-size fish is more than three times that of a box of mini-size fish [18], thus the price of a king-size fish is more than six times that of a mini-size fish. By using type-2 and type-3, fewer mini-and small-size fish and more large-and king-size fish were caught, so the value of the catch increased.…”

Section: Discussionmentioning

confidence: 99%

“…By using type-2 and type-3, fewer mini-and small-size fish and more large-and king-size fish were caught, so the value of the catch increased. The growth rate of hairtail is relatively rapid, and mini-size fish reach large and king size within 1 or 2 years [8,18], thus use of type-2 and type-3 improves conditions for hairtail growth with limited effects on the income of fisher households.…”

Section: Discussionmentioning

confidence: 99%

Conservation of small hairtail Trichiurus japonicas by using hooks with large artificial bait: effect on the trolling line fishery

et al. 2017

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undersized and immature female individuals. The number of fish caught, yield, and composition of commercial size grades per recruitment were calculated from field data for each lure and compared. The catch sizes (number of fish per recruitment) were smaller for type-2 and type-3 than for type-1, but yield per recruitment was higher for type-3 than for type-1. Compared with type-1, type-2 and type-3 caught more large individuals, which are more valuable. The newly developed artificial bait conserves hairtail stocks by targeting larger fish, which is economically beneficial for the hairtail trolling line fishery.

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A transdisciplinary research of coastal fisheries co-management: the case of the hairtail Trichiurus japonicus trolling line fishery around the Bungo Channel, Japan

Cited by 11 publications

References 34 publications

Science-policy-public interface toward ocean sustainability: An empirical study using legal documents, scientific publications, and public inquiry logs in Japan

Science-policy-public interface toward ocean sustainability: An empirical study using legal documents, scientific publications, and public inquiry logs in Japan

Stock structure and resource management of hairtail Trichiurus japonicus based on seasonal broods around the Bungo Channel, Japan

Conservation of small hairtail Trichiurus japonicas by using hooks with large artificial bait: effect on the trolling line fishery

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