Use of otolith microchemistry to estimate the migratory history of Japanese dace Tribolodon hakonensis in the Kamo River, Mie Prefecture

Abstract

The diadromous migratory history of Japanese dace Tribolodon hakonensis in the Kamo River, Mie Prefecture, was studied by examining the concentrations of strontium (Sr) and calcium (Ca) in their otoliths (lapillus) using wavelength dispersive X ray spectrometry on an electron microprobe. In the rearing examination, individuals which were collected in freshwater and acclimated to a seawater environment (20 37) showed a SrCa ra

Impacts of the Fukushima nuclear accident on fish and fishing grounds

“…The small-sized Carassius spp. and Japanese dace represent younger fi sh including age 0 and 1 (Suzuki and Kimura 1977 ;Liu et al 1986 ;Ishizaki et al 2009 ). Judging from our data and the information of age and growth for largemouth and smallmouth bass (Yodo and Kimura 1996 ;Nakamura et al 2004 ), we assume that the samples of these two species included age 0 and older fi sh.…”

Population density, growth and migration via the sea to different streams of Japanese dace Tribolodon hakonensis in lower reaches of small streams

“…The life history of anadromous Japanese dace has been described by Sakai (1995) and Ishizaki et al (2009). Mature adults migrate up rivers from the sea in spring for spawning, and return to the sea after spawning.…”

“…The life of dace in streams from October to the following June has not been investigated, and how dace spend their sea life has not been studied. The otolith Sr/Ca ratio as studied by Sakai and Imai (2005) and Ishizaki et al (2009) needs to be investigated in this region to know how long dace stay in the sea or streams. However, it is clear that individual dace have a variety of alternative life histories.…”

“…The fish migrate to rivers to spawn in spring, but some individuals are known to go into rivers in winter (Sakai 1995(Sakai , 2001a. The ratio of strontium to calcium concentration (Sr:Ca ratio) in the otolith of Japanese dace was investigated by Sakai and Imai (2005) and Ishizaki et al (2009) and supported the presence of both fluvial and anadromous types. However, the ecology of Japanese dace in the lower reaches of rivers and streams, such as population density, growth and migration, have been poorly reported.…”

Estimation of migratory history in female masu salmon Oncorhynchus masou (Brevoort, 1856) with the growth hormone pseudogene

“…Given that the Sr concentration is several hundred times higher in seawater than in freshwater (Rosenthal, Eves, & Cochran, 1970), it is possible to determine the migration history of an individual by evaluating the fluctuations in Sr/Ca ratios in otoliths, where trace elements remain stable for long periods (Campana, 1999;Arai, 2010). The determination of migration history from otolith samples has been performed on many fish species in the past few years, including Japanese dace Tribolodon hakonensis (Günther, 1880) (Ishizaki et al, 2009), Amago salmon Oncorhynchus masou ishikawae (Jordan and McGregor, 1925) (Umino et al, 2001), Dolly Varden trout Salvelinus malma (Walbaum, 1792) (Umatani, Arai, & Maekawa, 2008), and Japanese smelt Hypomesus nipponensis (McAllister, 1963) (Sasaki, Saruwatari, & Watanabe, 2006). The finding that the Sr/Ca ratios of the Sakhalin taimen Hucho perryi (Brevoort, 1856) are between the Sr/Ca ratios of fish in salt water and those in freshwater indicates that they spend time inhabiting brackish areas (Arai, 2010).…”