Temperature dependency equation for chub mackerel (Scomber japonicus) identified by a laboratory rearing experiment and microscale analysis

Abstract

In this study, juveniles of chub mackerel (Scomber japonicus) were reared from eggs in six different temperature treatments, and their otoliths were subjected to micromilling and microvolume stable oxygen isotope (d 18 O) analysis. We determined the d 18 O values of otoliths (d 18 O otolith) formed at mean temperatures of 16.3, 17.6, 18.3, 20.0, 24.0 and 26.58C and identified a linear relationship between rearing water temperature (T, 8C) and d 18 O otolith as follows: d 18 O otolith (VPDB)-d 18 O water (VSMOW) ¼À0.25 (AE0.01)T þ 4.46 (AE0.21) (R 2 ¼ 0.96, P , 0.01), where VPDB is Vienna Peedee Belemnite, VSMOW is Vienna Standard Mean Ocean Water and the error values in parentheses are standard deviations. This species-specific temperature dependency equation for chub mackerel will enable accurate reconstruction of individual thermal histories and provide essential information for effective resource management.

Intra- and inter-specific density dependence of body condition, growth, and habitat temperature in chub mackerel (Scomber japonicus)

“…Although previous studies reported changes in factors such as growth and maturity during the period of population decline (Watanabe and Yatsu, 2004, 2006), limited information is available for the period of population increase, especially for recent years. In addition, although much attention has been paid to the impact of environmental and endogenous factors (e.g., temperature, food availability, and age/size) on chub mackerel growth in the larval and early juvenile stages (Hunter and Kimbrell, 1980; Sassa and Tsukamoto, 2010; Kamimura et al , 2015; Higuchi et al , 2019; Kaneko et al , 2019; Taga et al , 2019; Nakamura et al , 2020), comparatively little research has been conducted on later growth stages (Parrish and Mallicoate, 1995; Watanabe and Yatsu, 2004; Yatsu et al , 2019).…”

Revealing Population Connectivity of the Estuarine Tapertail Anchovy Coilia nasus in the Changjiang River Estuary and Its Adjacent Waters Using Otolith Microchemistry

“…Therefore, the respective region should also be named as the "natal region." In addition to regional differences, the differences in δ 18 O between otoliths and water was negatively correlated with water temperature, and therefore it can be used as an indicator of ambient water temperature [25,61]. The significant differences between the populations of C. nasus in the Qiantang estuary and those in the Yellow Sea and the Changjiang estuary may mainly reflect the differences in the average water temperatures during the early life of C. nasus.…”

“…Although an otolith was originally used as a tool to estimate the age of fish [12,13], analyses of its shape and elemental/isotopic microchemistry have recently demonstrated enormous potential for its use in studies of species, population, or ecosystem-based management [14][15][16][17][18][19]. Meanwhile, otolith elemental/isotopic chemistry, also termed as otolith microchemistry, is a powerful technique for revealing migration history, population connectivity of the research object, temporal and spatial distribution characteristics (using elemental signatures) [20][21][22][23][24], dietary changes, and environmental temperature in the species' life-history using stable isotopic signatures [25][26][27][28], even with limited (e.g., 2-10) numbers of otolith samples [21,23,29].…”

Compound-Specific Nitrogen Isotope Analysis of Amino Acids in Eye Lenses as a New Tool to Reconstruct the Geographic and Trophic Histories of Fish

“…Because it was difficult to obtain larval and juvenile chub mackerel from the field, reared samples (n = 36; FL 41-185 mm) were used. Chub mackerel were reared at the Hakatajima Station, National Research Institute of Fisheries and Environment of Inland Sea (Imabari, Japan), following the procedure reported by Nakamura et al (2020). Lenses were extracted from intact eyes.…”