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- Title
Precocious development of the digestive system in relation to early appearance of piscivory in striped bonito Sarda orientalis larvae.
- Authors
KAJI, TATSUYA; KODAMA, MASAAKI; ARAI, HIROSHI; TAGAWA, MASATOMO; TANAKA, MASARU
- Abstract
Striped bonito Sarda orientalis larvae and juveniles were reared in a laboratory from hatching to 14 days post hatching, and the development of their digestive system was investigated histologically. On day 2 (first feeding day), the larval-type digestive system was differentiated. On day 3, a blind sac with densely distributed gastric glands developed and pyloric ceca appeared, suggesting that the digestive system was attaining adult-type structure. The yolk was completely absorbed on day 4. Bonito larvae preyed on rotifers and/or Artemia nauplii on day 2, but almost the whole gut was occupied by fish larvae from day 4. In the striped bonito, the adult-type digestive system was established right after first feeding, and this precocious development was well synchronized with the appearance of piscivory.
- Subjects
BONITO; LARVAE; PISCIVOROUS fishes; SCOMBRIDAE
- Publication
Fisheries Science, 2002, Vol 68, Issue 6, p1212
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1046/j.1444-2906.2002.00557.x