Evaluation of the Ba-137 mass-marking technique and potential effects in the early life history stages of Sepioteuthis lessoniana

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  • Chun- Chiang, Nagasaki Univ, Nagasaki University, Grad Sch Fisheries & Environm Sci
  • ,
  • Ming-Tsung Chung
  • ,
  • Tung-Wei Shih, Natl Museum Marine Sci & Technol
  • ,
  • Tin-Yam Chan, Natl Taiwan Ocean Univ, National Taiwan Ocean University, Ctr Excellence Oceans
  • ,
  • Atsuko Yamaguchi, Nagasaki Univ, Nagasaki University, Grad Sch Fisheries & Environm Sci
  • ,
  • Chia-Hui Wang, Natl Taiwan Ocean Univ, National Taiwan Ocean University, Dept Environm Biol & Fisheries Sci

The use of mass-marking techniques of enriched stable isotopes has increased in studies of ecology, movement patterns and the dispersal of marine organisms. However, the efficacy of this technique and its potential effects on hatchling size and statolith chemistry of cephalopods are yet to be investigated. Sepioteuthis lessoniana egg capsules were collected from northern Taiwan and assigned randomly to Ba-137-spiking experimental groups at 0.2, 0.5 and 1 ppm and three immersion durations (1, 3 and 7 days). Immersion duration >3 days produced significantly lower Ba-138 : Ba-137 ratios, with 100% marking success, indicating that it is a reliable marking technique. The Ba-137 mass marking had a positive effect on size at hatch and was likely to affect statolith trace element incorporation, including Cu, Zn and Pb. These findings highlight that it is necessary to consider the species-specific effects on hatchling size and physiological responses in when using stable isotopes mass-marking techniques.

OriginalsprogEngelsk
TidsskriftMarine and Freshwater Research
Vol/bind70
Nummer12
Sider (fra-til)1698-1707
Antal sider10
ISSN1323-1650
DOI
StatusUdgivet - 2019
Begivenhed6th International Otolith Symposium - Keelung
Varighed: 15 apr. 201820 apr. 2018

Konference

Konference6th International Otolith Symposium
ByKeelung
Periode15/04/201820/04/2018

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