Skip to main content

Coexistence of anadromous and lacustrine life histories of the shirauo, Salangichthys microdon

Buy Article:

$43.00 plus tax (Refund Policy)

Abstract

The environmental history of the shirauo, Salangichthys microdon, was examined in terms of strontium (Sr) and calcium (Ca) uptake in the otolith, by means of wavelength dispersive X-ray spectrometry on an electron microprobe. Anadromous and lacustrine type of the shirauo were found to occur sympatric. Otolith Sr concentration or Sr : Ca ratios of anadromous shirauo fluctuated strongly along the life-history transect in accordance with the migration (habitat) pattern from sea to freshwater. In contrast, the Sr concentration or the Sr : Ca ratios of lacustrine shirauo remained at consistently low levels throughout the otolith. The higher ratios in anadromous shirauo, in the otolith region from the core to 90–230 μm, corresponded to the initial sea-going period, probably reflecting the ambient salinity or the seawater–freshwater gradient in Sr concentration. The findings clearly indicated that otolith Sr : Ca ratios reflected individual life histories, enabling these anadromous shirauo to be distinguished from lacustrine shirauo.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Keywords: anadromous; habitat transition; lacustrine; migratory history; otolith Sr : Ca ratios; salangidae; seaward migration

Document Type: Short Communication

Affiliations: 1: Hokkaido Fish Hachery, Eniwa, Hokkaido 061-1433, Japan 2: Hokkaido Central Fisheries Experimental Station, Yoichi, Hokkaido 046-8555, Japan 3: Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan

Publication date: 2003-03-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more