Onset of individual growth difference in larviculture of Pacific bluefin tuna Thunnus orientalis using fertilized eggs obtained from one female

Autor:	Kentaro Ide, Shukei Masuma, Hideki Nikaido, Hitoshi Imaizumi, Nobuaki Suzuki, Takeo Kurihara, Yosuke Tanaka, Takayuki Takebe, Satoshi Shiozawa, Yoshitaka Sakakura
Rok vydání:	2012
Předmět:	Larva biology Pacific bluefin tuna fungi Broodstock Aquatic Science Body size biology.organism_classification Fishery Mouth opening Animal science medicine.anatomical_structure medicine Fish human activities Thunnus Otolith
Zdroj:	Fisheries Science. 78:343-350
ISSN:	1444-2906 0919-9268
DOI:	10.1007/s12562-011-0449-1
Popis:	We conducted a rearing experiment on Pacific bluefin tuna (PBT) larvae, which originated from one female broodstock, and determined the growth history of the larvae to clarify when the growth difference occurs. We investigated the otolith microstructure of the PBT larvae to examine the individual growth history and to predict the age and body size at the onset of individual growth difference. Since total length (TL) of fish can be back-calculated from otolith radius, we back-calculated TLs of 100 fish of 19 days post hatch (dph) divided into three size groups (small, intermediate, large). Growth difference was recognized from 3 dph (mouth opening), and the difference became larger thereafter. Growth of large-size fish was assumed to be promoted by the feeding conditions of PBT larvae.
Databáze:	OpenAIRE
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