Abstract
Isaza Gymnogobius isaza, a small freshwater goby endemic to Lake Biwa, Japan, is categorized as “Endangered” in the International Union for Conservation of Nature Red List of Threatened Species; nevertheless, it remains subject to fishing without any specific management strategies. The sex ratio, and gonadosomatic and hepatosomatic indices of Isaza caught by commercial bottom trawl and set net while migrating to and from an offshore pelagic area and nearshore spawning area were investigated in Lake Biwa from winter to early summer. Male spawning migrations preceded those of females. In addition, mortality during spawning was male-biased. Both findings suggested a possible impact of the commercial set net fishery on Isaza reproduction. Future conservation and fisheries management of the species need to be considered.
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References
Fujioka Y (2021) Isaza. In: Scientific committee for research into the wildlife in Shiga Prefecture (ed) Red Data Book of Shiga prefecture 2020, Sunrise Press, Shiga Prefecture, p 578 (in Japanese)
Fujioka Y, Saegusa J (2015) Sex ratios in relation to age and body size in “Honmoroko” Gnathopogon caerulescens. Ichthyol Res 62:512–515. https://doi.org/10.1007/s10228-014-0452-5
Golovin PV, Bakhvalova AE, Ivanov MV, Ivanova TS, Smirnova KA, Lajus DA (2019) Sex−biased mortality of marine threespine stickleback (Gasterosteus aculeatus L.) during spawning period in the White Sea. Evol Ecol Res 20:279–295
Hanson KC, Gravel MA, Graham A, Shoji A, Cooke SJ (2008) Sexual variation in fisheries research and management: when does sex matter? Rev Fish Sci Aquacult 16:421–436. https://doi.org/10.1080/10641260802013866
Hatano M, Ueno S, Kikko T (2022) Vertical distribution and initial food during the planktonic period of larval Isaza goby Gymnogobius isaza. Nippon Suisan Gakkaishi 88:463–471. https://doi.org/10.2331/suisan.22-00015. (in Japanese with English abstract)
Hidaka T, Takahashi S (1987) Reproductive strategy and interspecific competition in the lake−living gobiid fish Isaza, Chaenogobius isaza. J Ethol 8:185–196
Hsieh CH, Ishikawa K, Sakai Y, Ishikawa T, Ichise S, Yamamoto Y, Kuo TC, Park HD, Yamamura N, Kumagai M (2010) Phytoplankton community reorganization driven by eutrophication and warming in Lake Biwa. Aquat Sci 72:467–483. https://doi.org/10.1007/s00027-010-0149-4
Kanao S, Hasegawa K (2019) Gymnogobius isaza. The IUCN red list of threatened species 2019. https://doi.org/10.2305/IUCN.UK.2019−2.RLTS.T110461312A110461327.en
Keith P (2003) Biology and ecology of amphidromous Gobiiedae of the Indo−Pacific and the Caribbean regions. J Fish Biol 63:831–847. https://doi.org/10.1046/j.1095−8649.2003.00197.x
Kikko T (2018) Traditional Fishing in Lake Biwa: set net fishery called “Eri.” Culture of River 64:14–15 (in Japanese)
Kikko T, Okamoto H, Ujiie M, Ishizaki D, Saegusa J, Kai Y, Fujioka Y (2015) Different timings of spawning migration between sexes in Honmoroko, Gnathopogon caerulescens from Lake Biwa to the Ibanaiko Lagoon Japan. Jpn J Ichthyol 62:157–162. https://doi.org/10.11369/jji.62-157. (in Japanese with English abstract)
Kobayashi S, Yamanaka Y (1952a) Studies on propagation of Chaenogobius isaza Tanaka. II: preliminary consideration on the resource of isaza. Rep Shiga Pref Fish Exp Sta 1:2–6 (in Japanese)
Kobayashi S, Yamanaka Y (1952b) Studies on propagation of Chaenogobius isaza Tanaka. III: life history of isaza. Rep Shiga Pref Fish Exp Sta 3:1–5 (in Japanese)
Kobayashi S, Yamanaka Y, Torii R (1950) Spawning habit of Chaenogobius isaza Tanaka: preliminary report. Bull Jpn Soc Sci Fish 15:808–812 (in Japanese)
Meffe GK, Certain DL, Sheldon AL (1988) Selective mortality of post−spawning yellowfin shiners, Notropis lutipinnis (Pisces: Cyprinidae). Copeia 1988:853–858. https://doi.org/10.2307/1445707
Ministry of Environment, Government of Japan (2017) Red List of Ministry of Environment 2017. Tokyo, Japan. http://www.env.go.jp/press/files/jp/105449.pdf. Accessed 28 Aug 2023
Nagoshi M (1966) Ecological studies on the population of isaza, Chaenogobius isaza Tanaka, in Lake Biwa, with special reference to the effects of population density upon its’ growth. ResPopul Ecol 8:20–36. https://doi.org/10.1007/BF02524743
Nakanishi M, Sekino T (1996) Recent drastic changes in Lake Biwa bio−communities, with attention to exploitation of the littoral zone. GeoJournal 40:63–67
Nakazawa T, Ishida N, Kato M, Yamamura M (2007) Larger body size with higher predation rate. Ecol Freshw Fish 16:362–372. https://doi.org/10.1111/j.1600−0633.2007.00234.x
Nakazawa T, Liu S-YV, Sakai Y, Araki KS, Tsai C-H, Okuda N (2017) Spatial genetic structure and body size divergence in endangered Gymnogobius isaza in ancient Lake Biwa. Mitochondrial DNA Part A. https://doi.org/10.1080/24701394.2017.1357708
Rossiter A (2003) Lake Biwa as a topical ancient lake. Advanc Ecol Res 31:571–598. https://doi.org/10.1016/S0065-2504(00)31031-5
Rowe S, Hutchings A (2003) Mating systems and the conservation of commercially exploited marine fish. Trend Ecol Evol 18:567–572. https://doi.org/10.1016/j.tree.2003.09.004
Sakai A, Endo M (1998) Environmental condition of the spawning site and abundance of the nests at spawning grounds of Isaza Chaenogobius isaza in Lake Biwa. Rep Shiga Pref Fish Exp Stat 47:1–9 (in Japanese)
Takahashi S (1974) Sexual maturity of Isaza (Chaenogobius isaza)-I The seasonal changes of growth and sexual maturation. Bull Jpn Soc Sci Fish 40:847–857 (in Japanese with English abstract)
Takahashi S (1981a) Vertical distribution and diel migration of Isaza, Chaenogobius isaza, Pisces in Lake Biwa. Zool Mag 90:265–270. https://doi.org/10.34435/zm004859
Takahashi S (1981b) Sexual maturity of Isaza, Chaenogobius isaza II. Gross morphology and histology of the ovary. Zool Mag 90:54–61
Takahashi D (2008) Life-history variation in relation to nest site abundance in males of the freshwater goby Tridentiger brevispinis. Ecol Freshw Fish 17:71–77. https://doi.org/10.1111/j.1600−0633.2007.00260.x
Takahashi D, Asada H, Takeyama T, Takahata M, Katoh R, Awata S, Koda M (2004) Why egg-caring males of Isaza (Gymnogobius isaza Gobiidae) refuse additional females: preliminary field observations. J Ethol 22:153–159. https://doi.org/10.1007/s10164-004-0116-4
Yuma M, Hosoya K, Nagata Y (1998) Distribution of the freshwater fishes of Japan: an historical overview. Environ Biol Fish 52:97–124
Acknowledgements
We thank the Momose and Okishima Fishery Cooperative for collecting the specimen. The procedures undertaken in this study complied with current laws in Japan. We also thank G. S. Hardy for his critical reading of the manuscript and assistance with English.
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Takenaka, T., Ishizaki, D., Hatano, M. et al. Differences in spawning migration timing and mortality between males and females of the pelagic goby Gymnogobius isaza in Lake Biwa, central Japan. Fish Sci 90, 29–39 (2024). https://doi.org/10.1007/s12562-023-01726-1
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DOI: https://doi.org/10.1007/s12562-023-01726-1