We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Ontogenetic and diel variation in the vertical distribution of larvae of jack mackerel Trachurus japonicus in the East China sea.
- Authors
Hirota, Yuuichi; Honda, Hitoshi; Sakaji, Hideo; Uehara, Shinji
- Abstract
Larvae of jack mackerel Trachurus japonicus were sampled in seven depth layers (0–10 m, 10–20 m, 20–30 m, 30–40 m, 40–50 m, 50–70 m, and 70–100 m), with a closing-type frame net, on 26th–27th February, 2003, at Sta. V (27°50′N, 126°00′E) continental shelf edge in the southern part of East China Sea, to examine their vertical distribution. Most of the larvae (>90%) occurred in the upper 50 m layer during both day and night. In the daytime, larvae of length from 3.0 mm to 4.5 mm were most abundant in the 10–20 m layer, those from 5.0 to 6.0 mm were most abundant in the 20–30 m layer, those from 6.0 to 8.0 mm occurred at greater depth, in the 30–40 m layer, and those more than 9.0 mm were found in the 0–10 m layer and performed ontogenetic vertical migrations. Larvae from 6 mm to 8 mm length performed diurnal vertical migration, for the percentage (16.7%) of larval number in the 0–20 m layer in the daytime increased to 42.1% at night and the percentage (78.1%) in the 20–50 m layer in the daytime decreased to 49.0% at night.
- Subjects
FISH research; JACK mackerel; MACKERELS; MARINE biology; LARVAE; MARINE sciences
- Publication
Fisheries Science, 2009, Vol 75, Issue 3, p577
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1007/s12562-009-0075-3