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Temperature determines growth rates of larval round herring Etrumeus teres in the Pacific coastal waters off southern Japan.
- Source :
-
Fisheries Science . Sep2013, Vol. 79 Issue 5, p757-766. 10p. 2 Charts, 4 Graphs, 1 Map. - Publication Year :
- 2013
-
Abstract
- Seasonal variation in daily growth rates in the early and middle larval stages of round herring Etrumeus teres were largely determined by the sea temperatures experienced by hatch-date cohorts in the Pacific coastal waters off southern Japan. Round herring larvae were collected by purse seining in the coastal waters of central Tosa Bay. A total of 451 larvae were aged by reading daily rings in otoliths. Individuals within a range of 2-5 hatch dates were grouped as hatch-date cohorts. We selected 16 cohorts that hatched during September 2000 and March 2002 and calculated mean widths of otolith growth increments for each cohort during the first feeding stage ( W, increments 1-5) and the maximum increment width in the middle larval stage ( W). Seasonal variation in mean W and W among the 16 cohorts was largely (80-90 %) explained by the sea temperature in the bay. These results indicate that temperature was a predominant determinant of larval growth rates; other environmental factors, such as food availability, did not substantially affect growth rates of round herring larvae in coastal waters along the subtropical Kuroshio Current off southern Japan. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ETRUMEUS
*LARVAE
*COLD (Temperature)
*PURSE seining
*OTOLITHS
TSUSHIMA Current
Subjects
Details
- Language :
- English
- ISSN :
- 09199268
- Volume :
- 79
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Fisheries Science
- Publication Type :
- Academic Journal
- Accession number :
- 90132670
- Full Text :
- https://doi.org/10.1007/s12562-013-0647-0