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

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

doi:10.1007/s12562-013-0680-z

Cited by 16 publications

(30 citation statements)

References 44 publications

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“…It has been shown that the promotion of initial swim bladder inflation is effective in preventing these malformations (Tsuji et al . ), and a similar effect has also been observed in red sea bream Pagrus major (Kitajima, Tsukashima, Fujita, Watanabe & Yone ; Kitajima, Watanabe, Tsukashima & Fujita ). In some percomorph species, as a method to promote initial swim bladder inflation, a surface skimmer has been shown to be effective in removing the oily surface film from the rearing water surface during the larval stage (Chatain & Ounais‐Guschemann ; Battaglene, McBride & Talbot ; Trotter, Pankhurst & Battaglene ; Kawabe & Kimura ; Imai, Iwasaki, Hashimoto, Hirata, Hamasaki, Teruya, Hamada & Mushiake ; Kurata, Seoka, Nakagawa, Ishibashi, Kumai & Sawada ; Summerfelt ; Kurata, Ishibashi, Takii, Kumai, Miyashita & Sawada ).…”

Section: Introductionsupporting

confidence: 72%

“…Tsuji et al . (), who reported that unsuitable water temperature during larval rearing is responsible for skeletal malformations in this species, found that the incidence rate of spinal curvature and deformation of the centra was significantly lower in individuals with initial swim bladder inflation than those without swim bladder inflation. It has been shown that the promotion of initial swim bladder inflation is effective in preventing these malformations (Tsuji et al .…”

Section: Introductionmentioning

confidence: 84%

“…; Tsuji et al . ). These malformations can have a major negative impact on the commercial aquaculture of this species, as they reduce the fingerlings quality and decrease production efficiency.…”

Section: Introductionmentioning

confidence: 97%

“…; Tsuji et al . ). Therefore, failure of initial swim bladder inflation is considered to be due to factors other than the oily surface film (Tsuji et al .…”

Section: Introductionmentioning

confidence: 97%

“…Therefore, failure of initial swim bladder inflation is considered to be due to factors other than the oily surface film (Tsuji et al . ). However, a number of studies did not report initial swim bladder inflation under the same environmental conditions (Nagano et al .…”

Section: Introductionmentioning

confidence: 97%

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Promotion of initial swim bladder inflation and effect of initial inflation failure on skeletal malformation in cultured seven-band grouperHyporthodus septemfasciatus(Thunberg)

Tsuji¹,

Uji

Tsuchihashi³

et al. 2014

Aquac Res

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The effects of the removal of the oily surface film on initial swim bladder inflation and survival in cultured seven‐band grouper Hyporthodus septemfasciatus were investigated during the larval stage. Additionally, the relationship between swim bladder inflation failure and malformations in later stages was examined. To explore promotion conditions for inflation, duplicate experiments were conducted under three different water surface conditions: removal of the oily surface film (ROF group), covering the water surface with an oil film (COF group), and sealing the water surface with liquid paraffin (SLP group). Larval swim bladder inflation was first observed 14 days after hatching (DAH) in the ROF group; thereafter, swim bladder inflation rates increased to 11.1% and 38.7% until the end of the experiments. This indicates that initial swim bladder inflation occurs at the pre‐flexion stage in larval development. Conversely, bladder inflation was rarely observed in the COF or SLP groups, indicating the promotional effect of surface film removal on larval swim bladder inflation and suggesting that gulping atmospheric air is necessary for initial inflation. Although larval water surface death occurred frequently in the ROF group, no significant difference existed in any group between the survival rates at 10 DAH and at the end of the experiment. The incidence rate of spinal curvature and deformation of the centra was significantly higher in individuals without initial swim bladder inflation, and these malformations mainly occurred in the caudal vertebra. Therefore, the removal of the oily surface film promotes initial swim bladder inflation and reduces larval malformations.

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Section: Introductionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 97%

“…; Tsuji et al . ). Therefore, failure of initial swim bladder inflation is considered to be due to factors other than the oily surface film (Tsuji et al .…”

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

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