Abstract
Tracking the movement of migratory fish is of great importance for efficient conservation, although this has been technically difficult to achieve in small fish to which artificial tags cannot be attached. We show that migration history can be reproduced by combining high-resolution otolith stable oxygen isotope ratio (δ18O) analysis and numerical simulation. High-precision micromilling and microvolume carbonate analysing systems had the remarkable capability of extracting the otolith δ18O profiles with 10–30 days resolution. Furthermore, reasonable movements were reproduced by searching the routes consistent with the otolith δ18O profile, using an individual-based model with random swimming behaviour. This method will be a valuable alternative to tagging and electronic loggers for revealing migration routes in early life stages, thereby providing crucial information to understand population structures and the environmental cause of recruitment variabilities, and to validate and improve fish movement models.
| Original language | English |
|---|---|
| Journal | Methods in Ecology and Evolution |
| DOIs | |
| Publication status | Accepted/In press - Jan 1 2018 |
| Externally published | Yes |
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Keywords
- behaviour
- IBM
- isotope
- migration
- otolith
- population structure
- sardine
- small pelagic fish
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Ecological Modelling
Cite this
Combining microvolume isotope analysis and numerical simulation to reproduce fish migration history. / Sakamoto, Tatsuya; Komatsu, Kosei; Shirai, Kotaro; Higuchi, Tomihiko; Ishimura, Toyoho; Setou, Takashi; Kamimura, Yasuhiro; Watanabe, Chikako; Kawabata, Atsushi.
In: Methods in Ecology and Evolution, 01.01.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Combining microvolume isotope analysis and numerical simulation to reproduce fish migration history
AU - Sakamoto, Tatsuya
AU - Komatsu, Kosei
AU - Shirai, Kotaro
AU - Higuchi, Tomihiko
AU - Ishimura, Toyoho
AU - Setou, Takashi
AU - Kamimura, Yasuhiro
AU - Watanabe, Chikako
AU - Kawabata, Atsushi
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Tracking the movement of migratory fish is of great importance for efficient conservation, although this has been technically difficult to achieve in small fish to which artificial tags cannot be attached. We show that migration history can be reproduced by combining high-resolution otolith stable oxygen isotope ratio (δ18O) analysis and numerical simulation. High-precision micromilling and microvolume carbonate analysing systems had the remarkable capability of extracting the otolith δ18O profiles with 10–30 days resolution. Furthermore, reasonable movements were reproduced by searching the routes consistent with the otolith δ18O profile, using an individual-based model with random swimming behaviour. This method will be a valuable alternative to tagging and electronic loggers for revealing migration routes in early life stages, thereby providing crucial information to understand population structures and the environmental cause of recruitment variabilities, and to validate and improve fish movement models.
AB - Tracking the movement of migratory fish is of great importance for efficient conservation, although this has been technically difficult to achieve in small fish to which artificial tags cannot be attached. We show that migration history can be reproduced by combining high-resolution otolith stable oxygen isotope ratio (δ18O) analysis and numerical simulation. High-precision micromilling and microvolume carbonate analysing systems had the remarkable capability of extracting the otolith δ18O profiles with 10–30 days resolution. Furthermore, reasonable movements were reproduced by searching the routes consistent with the otolith δ18O profile, using an individual-based model with random swimming behaviour. This method will be a valuable alternative to tagging and electronic loggers for revealing migration routes in early life stages, thereby providing crucial information to understand population structures and the environmental cause of recruitment variabilities, and to validate and improve fish movement models.
KW - behaviour
KW - IBM
KW - isotope
KW - migration
KW - otolith
KW - population structure
KW - sardine
KW - small pelagic fish
UR - http://www.scopus.com/inward/record.url?scp=85055019180&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055019180&partnerID=8YFLogxK
U2 - 10.1111/2041-210X.13098
DO - 10.1111/2041-210X.13098
M3 - Article
JO - Methods in Ecology and Evolution
JF - Methods in Ecology and Evolution
SN - 2041-210X
ER -