• Title/Summary/Keyword: 황복

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Embryonic, Larval, and Juvenile Stages in Yellow Puffer, Takifugu obscurus (황복의 난발생과 자치어 발달)

  • Jang, Seon-Il;Kang, Hee-Woung;Han, Hyoung-Kyun
    • Journal of Aquaculture
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    • v.9 no.1
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    • pp.11-18
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    • 1996

  • We described morphological characteristics of embryonic, larval, and juvenile period of the yellow puffer, Takifugu obscurus. We defined seven periods of embryogenesis the zygote, cleavage, blastula, gastrula, segmentation, pharygula, and hatching periods. The eggs were adhesive and spherical in shape. The egg yolk had numerous tiny oil globules. Hatching began about 280 hours after insemination at $17.0{\pm}1.0^{\circ}C$ water temperature. Melanopores of star shape were seen on yolk, head and trunk during the pharygula and hatching period. The hatched larvae haying large yolk were $3.00\~3.54$ mm in size with $25\~26$ myomeres. The larvae completely absorbed the yolk materials and oil globules within 7 days after hatching and became post-larvae. Laval fish became juveniles within 60 days after hatching, and they reached $23.54\~30.12$ mm in total length and had fin-rays.

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Induced Ovulation by using Human Chorionic Gonadotropin and Gonadotropin-Releasing Hormone Analogue plus Pimozide in Yellow Puffer, Takifugu obscurus (인간의 태반성 성선자극호르몬 또는 성선자극호르몬-방출호르몬 유도체와 Pimozide에 의한 황복의 배란유도)

  • Jang, Seon-Il
    • Journal of Aquaculture
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    • v.9 no.1
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    • pp.3-10
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    • 1996

  • Ovulation of maturing female yellow puffer, Takifugu obscrus, was induced by using single injection of human chorionic gonadotropin (HCG) or gonadotropin releasing hormone-analogue (GnRH-A) $des-Gly^{10}[D-Ala^6]$ GnRH-ethylamide plus pimozide. The response was evaluated using the fertilization and embryo-formation rate after insemination and the gonadotropin (GTH) level in blood plasma using radioimmunoassay. In the fertilization and embryo-formation, maximal effects were recorded by using 1,000 IU/kg HCG or $10\;{mu}g/kg$ GnRH-A plus 5 mg/kr pimozide. Pimozide (1, 5 mg/kg) or GnRH-A treatment alone was not effective in elevation of GTH level, however combinations of these treatments were particularly effective. Injection of dopamine blocked the rapid elevation of plasma GTH levels of blood. These data suggest that yellow puffer secrete GnRH and gonadotropin-releasing-inhibiting factor during the spawning or the other period.

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The Changes of Digestive Enzyme Activity in Early Stages of the River Puffer, Takifugu obscurus (황복, Takifugu obscurus, 초기 단계의 소화효소 변화)

  • SON Kyu-Hee;HAN Kyung-Nam;CHANG Chung-Soon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.34 no.6
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    • pp.577-583
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    • 2001

  • The digestive enzyme activities such as $\alpha-amylase$, trypsin and pepsin from the laboratory-reared river puffer Takifugu obscurus were measured from the time course of 1 day until the 65 day after hatching. In the case of $\alpha-amylase$, it was showed minimum activity of 0.0493 U/mg at the total length (TL) 10 mm, and showed maximum activity of 0.1480 U/mg at 19 mmTL. Trypsin and pepsin were showed their maximum activities of 0.0264, 0.0258 U/mg and 0.0178, 0.0201 U/mg when the total length of 16 and 24 mm, and represented remarkable correlations between the changes of enzyme activity and growth rate. The ontogenetic variations of digestive enzymes were represented clearly different patterns; i.e, the pepsin showed higher activity when the periods of larva ($4\~5\;mmTL$) and juvenile II ($19\~24\;mmTL$), however, the trypsin represented maximum activity at the stages of juvenile I ($11\~16\;mmTL$) and young fish (27 mmTL), respectively.

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Sitological Quality Evaluation of Cultured and Wild River Puffer, Takifugu obscurus (Abe) (양식산과 자연산 황복, Takifugu obscurus (Abe)의 식품학적 품질평가)

  • Kang, Hee-Woong;Shim, Kil-Bo;Kang, Duk-Young;Jo, Ki-Che;Song, Ki-Cheol;Lee, Jin-Ho;Song, Hong-In;Son, Sang-Gyu;Cho, Young-Je
    • Journal of Aquaculture
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    • v.20 no.3
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    • pp.147-153
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    • 2007

  • The present study was performed to evaluate sitological quality of the cultured and wild river puffer, Takifugu obscurus. Proximate composition, the content of extractive nitrogen, the content of nucleotides and their related compounds, total and free amino acid, and fatty acids were analysed and sensory evaluation in the muscle of the river puffer were compared. The cultured river puffer had a higher moisture content compared to the wild fish, while there was no significant difference in crude lipid, crude protein and ash contents. Nucleotides and their related compounds including ATP, ADP, AMP, IMP, HxR and Hx were detected. The result from analyzing ATP-related compound showed difference in total content by wild and cultured river puffer, and IMP content that had largest influence upon the savory taste of sliced raw fish, was higher in the cultured fishes than wild ones. Breaking strength level of the wild river puffer was higher than that of the cultured fish. High levels of C16:0 and C18:0 were shown in all samples and -3 polyunsaturated fatty acid content were not different between the cultured and wild river puffers (P>0.05). Total 17 amino acids were detected in the samples, and most of the samples had high contents of glutamic acid, aspartic acid, lysine and leucine and low contents of cystine, histidine, methionine and tyrosine. The result from surveying free amino acid content of wild and cultured river puffer showed difference in content, but generally taurine and lysine content for the whole free amino acid held the most part. There was no significant difference in texture, flavor and overall acceptance score between the cultured and wild fishes (P>0.05).

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