NDLI: Effect of temperature on survival, growth and malformation of cultured larvae and juveniles of the seven-band grouper Epinephelus septemfasciatus

Content Provider	Springer Nature Link
Author	Tsuji, Masaharu Abe, Hisayo Hanyuu, Kazuhiro Kuriyama, Isao Tsuchihashi, Yasushi Tsumoto, Kingo Nigou, Takuo Kasuya, Tooru Katou, Takashi Kawamura, Takeshi Okada, Kazuhiro Uji, Susumu Sawada, Yoshifumi
Copyright Year	2013
Abstract	The effects of rearing temperature (23–29 °C) during the larval and juvenile stage on survival, growth and skeletal malformations in the seven-band grouper Epinephelus septemfasciatus were investigated. The survival rate of juveniles 30–40 mm in total length emerging from eggs was higher at 25 and 26 °C (0.1–1.3 %) than at 23 °C or 27–29 °C (0.004–1.5 %). Growth (increase in total length) was accelerated at higher temperatures. The frequency of malformed individuals was lower at 25–27 °C (36.0–61.5 %) than at 23, 28 or 29 °C (65.3–76.9 %). Specific incidences of spinal curvature and centrum fusion or defects in juveniles were not related to rearing temperature. However, incidences of twisted or compressed vertebrae (6.5–64.0 %) were higher at higher temperatures, while the incidence of bifurcated neural spine was significantly higher at 23 °C (43.6–54.4 %) than at other temperatures (3.3–22.7 %). The incidence rate of spinal curvature (23.3 %) was significantly higher in juveniles with a deflated swim bladder, regardless of rearing temperature. The results of this study suggest that the optimum culture temperature for seven-band grouper is 25–26 °C, collectively considering the survival, growth and incidences of abnormalities. Our results also demonstrate the significance of identifying the conditions for swim bladder inflation to prevent spinal curvature in seven-band grouper.
Starting Page	69
Ending Page	81
Page Count	13
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	80
Issue Number	1
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2013-11-05
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Seven-band grouper Larva Juvenile Rearing water temperature Survival Growth Malformation Swim bladder inflation Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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