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Marine Ecology Progress Series

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MEPS 529:145-158 (2015)  -  DOI:

Effects of temperature on embryonic development and paralarval behavior of the neon flying squid Ommastrephes bartramii

Dharmamony Vijai1,*, Mitsuo Sakai2, Toshie Wakabayashi2,3, Hae-Kyun Yoo1, Yoshiki Kato2, Yasunori Sakurai1

1School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate 041-8611, Japan
2Tohoku National Fisheries Research Institute, 25-259 Shimo-mekurakubo, Samemachi, Hachinohe, Aomori 031-0841, Japan
3Present address: Department of Fisheries Science and Technology, National Fisheries University, 2-7-1 Nagata-Honmachi, Shimonoseki, Yamaguchi 759-6595, Japan
*Corresponding author:

ABSTRACT: Studies on the relationships between the early life stages of the neon flying squid Ommastrephes bartramii and oceanographic conditions are essential for understanding the spatial and temporal distribution patterns of this ecologically and economically important species. In this study, O. bartramii eggs were artificially fertilized and incubated at temperatures found in its known distribution range (16-26°C). Complete organogenesis with normal successive cleavage and the distinct continuity of morphological features was limited to between 18 and 25°C. Experimental rearing, cruise-collected specimens, and oceanographic data confirmed that the optimal temperature range for paralarval survival around Hawaii is 18 to 25°C. Embryos reared at 16°C showed abnormal organogenesis; however, normal development resumed when the embryos were transferred to 22 or 24°C after blastoderm formation. Hatchlings showed a variety of swimming behaviors, which may allow squid to regulate their thermal distribution in the wild. Furthermore, ball formation and associated chromatophore expansion might represent an aposematic adaptation to imitate unpalatable prey. This study highlights the flexible strategy of O. bartramii embryo development and illustrates how information on paralarval behavior and oceanographic data (sea surface temperature) may be combined to improve our understanding of the factors that influence the survival of this species.

KEY WORDS: Ommastrephidae · Sub-tropical frontal zone · Embryonic development · Sea surface temperature · Paralarval behavior

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Cite this article as: Vijai D, Sakai M, Wakabayashi T, Yoo HK, Kato Y, Sakurai Y (2015) Effects of temperature on embryonic development and paralarval behavior of the neon flying squid Ommastrephes bartramii. Mar Ecol Prog Ser 529:145-158.

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