scholarly journals Effect of ambient temperature on the vertical distribution and movement of Pacific bluefin tuna Thunnus thynnus orientalis

2000 ◽  
Vol 206 ◽  
pp. 251-260 ◽  
Author(s):  
T Kitagawa ◽  
H Nakata ◽  
S Kimura ◽  
T Itoh ◽  
S Tsuji ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Ambient Temperature ◽  
Bluefin Tuna ◽  
Pacific Bluefin Tuna ◽  
Thunnus Thynnus ◽  
The Vertical Distribution

scholarly journals Diving behavior of immature Pacific bluefin tuna (Thunnus thynnus orientalis) recorded by an archival tag

2002 ◽  
Vol 68 (sup1) ◽  
pp. 427-428 ◽  
Author(s):  
TAKASHI KITAGAWA ◽  
HIDEAKI NAKATA ◽  
SHINGO KIMURA ◽  
HARUMI YAMADA
Keyword(s):  
Bluefin Tuna ◽  
Diving Behavior ◽  
Pacific Bluefin Tuna ◽  
Thunnus Thynnus ◽  
Archival Tag

Preliminary Observations on Development of Pacific Bluefin Tuna Thunnus thynnus (Scombridae) Larvae Reared in the Laboratory, with Special Reference to the Digestive System

1996 ◽  
Vol 47 (2) ◽  
pp. 261 ◽  
Author(s):  
T Kaji ◽  
M Tanaka ◽  
Y Takahashi ◽  
M Oka ◽  
N Ishibashi
Keyword(s):  
Digestive System ◽  
Fish Larvae ◽  
Gastric Gland ◽  
Bluefin Tuna ◽  
Juvenile Stage ◽  
Growth Potential ◽  
Morphological Development ◽  
Pacific Bluefin Tuna ◽  
Thunnus Thynnus ◽  
Pyloric Caeca

Pacific bluefin tuna larvae (Thunnus thynnus) were experimentally reared from 2-day-old yolk-sac larvae through 30-day-old early juveniles in June and July 1994. The larvae initially fed on rotifers on Day 3 and Artemia nauplii, fish eggs and larvae around Day 13, and thereafter were fed Artemia larvae and an artificial diet. The larvae had transformed to the juvenile stage after 30 days. The primitive digestive system differentiated on Day 3. The gastric gland and pyloric caeca first appeared on Day 11 and 14, respectively. The pharyngeal and jaw teeth became fully functional with gastric gland differentiation. The number of gastric glands and pyloric caeca and volume of the gastric blind sac increased markedly with development to the juvenile stage. Although the external morphological development of the tuna resembles the pattern of many other marine fish larvae, the basic digestive system developed at an earlier larval stage; this precocity may relate to the early appearance of piscivory and the high growth potential of tuna larvae.

Ontogeny of swim bladder inflation and caudal fin aspect ratio with reference to vertical distribution in Pacific bluefin tuna Thunnus orientalis larvae

2014 ◽  
Vol 80 (6) ◽  
pp. 1293-1299 ◽  
Author(s):  
Yoshiaki Ina ◽  
Wataru Sakamoto ◽  
Shigeru Miyashita ◽  
Hiromu Fukuda ◽  
Shinsuke Torisawa ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Vertical Distribution ◽  
Bluefin Tuna ◽  
Pacific Bluefin Tuna ◽  
Swim Bladder ◽  
Thunnus Orientalis ◽  
Caudal Fin ◽  
Swim Bladder Inflation

Vertical distribution of larval Pacific bluefin tuna, Thunnus orientalis, in the Japan Sea

2020 ◽  
Vol 175 ◽  
pp. 104785 ◽  
Author(s):  
Taketoshi Kodama ◽  
Seiji Ohshimo ◽  
Atsushi Tawa ◽  
Seishiro Furukawa ◽  
Kenji Nohara ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Japan Sea ◽  
Bluefin Tuna ◽  
Pacific Bluefin Tuna ◽  
Thunnus Orientalis ◽  
The Japan Sea

Vertical distribution of Atlantic bluefin tuna Thunnus thynnus and bonito Sarda sarda larvae is related to temperature preference

2018 ◽  
Vol 594 ◽  
pp. 231-243 ◽  
Author(s):  
P Reglero ◽  
E Blanco ◽  
F Alemany ◽  
C Ferrá ◽  
D Alvarez-Berastegui ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Bluefin Tuna ◽  
Thunnus Thynnus ◽  
Temperature Preference ◽  
Atlantic Bluefin Tuna ◽  
Sarda Sarda

scholarly journals Influence of the Seasonal Thermocline on the Vertical Distribution of Larval Fish Assemblages Associated with Atlantic Bluefin Tuna Spawning Grounds

Oceans ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 64-83
Author(s):  
Itziar Alvarez ◽  
Leif K. Rasmuson ◽  
Trika Gerard ◽  
Raul Laiz-Carrion ◽  
Manuel Hidalgo ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Fish Assemblages ◽  
Larval Fish ◽  
Fish Larvae ◽  
Bluefin Tuna ◽  
Vertical Position ◽  
Near Surface ◽  
Atlantic Bluefin Tuna ◽  
Seasonal Thermocline ◽  
The Vertical Distribution

Temperature is often an important variable influencing the vertical position of fish larvae in the water column. The same species may show different vertical distributions in areas with a strong near-surface seasonal thermocline compared to isothermal near-surface regions. In areas with a strong surface thermocline, tuna larvae show a significant preference for the near-surface warmer layers. Little is known regarding larval tuna vertical distribution in isothermal waters and on the vertical distribution of the associated larval fish assemblages. We conducted vertical stratified sampling using the same methodology and fishing device (MOCNESS) in the two major spawning areas of Atlantic bluefin tuna (BFT): western Mediterranean Sea (MED), characterized by a surface thermocline, and the Gulf of Mexico (GOM) which lacks thermal stratification. Tuna larvae occupied the upper 30 m in both areas, but the average larval depth distribution was consistently deeper in the GOM. In the MED, vertical distribution of larval fish assemblages was explained by temperature, and species such as BFT, Thunnus alalunga, and Ceratoscopelus maderensis, among others, coexist above the thermocline and are separated from species such as Cyclothone braueri and Hygophum spp. (found below the thermocline). In the GOM, the environmental correlates of the vertical distribution of the larvae were salinity and fluorescence. Mesopelagic taxa such as Ceratoscopelus spp. and Cyclothone spp., among others, had a shallower average distribution than Lampanyctus spp., Hygophum spp., and Myctophum spp.

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