• Title/Summary/Keyword: Takifugu species

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Seasonal distribution characteristics of fishery creatures caught in funnel net fishing ground of the Yeosu coastal sea (여수 연안 승망 어장에서 어획된 어업생물의 계절별 분포특성)

  • Joo, Chan-Soon;Park, Jin-Hyung;Park, Ju-Sam
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.42 no.3
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    • pp.158-168
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    • 2006
  • A study on the species composition and seasonal variations of fishery creatures caught by a funnel net was carried out in the coastal water off Dolsan Island, Yeosu from 2002 to 2003. During the study period, a total of 23 fishery creatures species were caught. Seabream(Acanthopagrus schlegeli), sea bass(Lateolabrax japonicus), mullet(Mugil cephalus), puffer(Takifugu niphobles) and rockfish(Sebastes inermis) predominated. These five species accounted for 85.1% of the total number of fishery creatures caught. Seasonal peaks of number of species occurred in summer, while those of number of individuals occurred in autumn. The lowest number of species and individuals were observed in winter. The large annual variation of diversity indices were observed from May to August. These large annual variation of diversity indices were mainly due to predominance of seabream, sea bass and mullet which accounted for most of all fishery creatures caught. The seasonal variations of fishery creatures showed that sea bass and mullet were caught mainly from spring to summer, seabream and puffer were caught mainly in autumn, and rockfish and brotula(Hoplobrotula armata) were caught mainly in winter.

Effect of Food and Salinity on Larval Growth and Survival of the River Puffer, Takifugu obscurus (황복, Takifugu obscurus의 초기 발달 동안 성장 및 생존에 있어 먹이와 염분의 효과)

  • 강희웅;강덕영;조기채;이진호;박광재;김종화
    • Journal of Aquaculture
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    • v.17 no.3
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    • pp.221-227
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    • 2004
  • In the present study, we investigated the effects of food and salinity on growth and survival of river puffer, Takifugu obscurus offsprings in indoor land-based tank during the early development. In the food experiment, the river puffer larvae (TL 8.7$\pm$0.1 mm, BW 20.0$\pm$3.2 mg) were fed with tubificid, Limnodrilus gotoi, water flea, Daphnia carinata, mysid, Neomysis awatschensis, Manila clam, Ruditapes philippinarum and artificial food together Artemia nauplii for 30 days, and the growth and the survival of larvae were investigated. In the salinity experiment, the river puffer larvae and juvenile at three stages (Stage I: TL 5.8$\pm$0.4 mm; Stage II: TL 12.0$\pm$0.2 mm, Stage III: TL 44.5$\pm$0.7 mm) were supplied with Artemia nauplii, water flea and/or artificial food and were reared in 0, 10, 20 and 30 psu at respective stages. The results shows that the growth rates of larvae feeding with artificial food and tubificid together Artemia nauplii were higher than those of larvae in other groups, but the survival rates of larvae feeding with water flea and mysid together Artemia nauplii were higher than those of larvae in other groups. In salinity, the results shows that the growth and survival rates of offsprings were significantly higher in 10∼20 psu than those in 0 and 30 psu at Stage I and n. At Stage III, the growth and the survival rates were the highest in 20 psu, but the lowest in 0 psu. However, it should be noted that the rates in 0 and 30 psu were significantly enhanced at Stage III in comparison with those at Stage I and II. Therefore, it is concluded that river puffer, T. obscurus is euryhaline marine species, which can normally grow and live at salinities from 0 to 30 psu, and that a combinative supplement with Artemia nauplii and water flea, D. carinata may confer an advantage on growth and survival of the river puffer offsprings in indoor land-based tank.

Effect of Water Temperature, Fish Age, and MS-222 Concentration on the Anesthetization of River Pufferfish, Takifugu obscurus (황복의 마취에 미치는 수온 및 연령과 MS-222 농도의 영향)

  • Seungyeon Lee;Phuong Thi Nguyen;Ho-Kyung Song;Sung Pyo Hur;Jin-Hyoung Kim
    • Korean Journal of Ichthyology
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    • v.35 no.2
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    • pp.67-74
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    • 2023
  • The river pufferfish (Takifugu obscurus) is a valuable species in aquaculture and genetic studies. Usage of fish anesthetics aids in the easier handling of fish during aquaculture. However, there are no studies on appropriate conditions required for effective anesthetization of pufferfish. This study aims to determine the optimal conditions (fish age, water temperature, anesthetic concentration) needed for the most common fish anesthesia, MS-222, to anesthetize T. obscurus. We tested three different water temperatures (20℃, 24℃, and 28℃), three different anesthetic concentrations (125 mg/L, 150 mg/L, and 175 mg/L), and two different fish ages (one- and two-year-old). Appropriate anesthetization conditions for T. obscurus ranged from 150 mg/L to 175 mg/L of MS-222 at 24℃ to 28℃ for one-year-old fish. For two-year-old fish, the appropriate conditions ranged from 150 mg/L to 175 mg/L of MS-222 at 28℃. However, to minimize side effects and risks, 150 mg/L of MS-222 at 24℃ for one-year-old fish and 175 mg/L of MS-222 at 28℃ for two-year-old fish are recommended for effective anesthetization.

Determination of Tetrodotoxin and its Analog Composition in Korean Takifugu porphyreus Pufferfish (국내산 검복의 테트로도톡신 및 그 유사체 분석)

  • Bong Ki Park;Hyunjun Lee;Jonghyub Park;Nobuhisa Kajino;Kwang-Sik Choi;Wan-Ok Lee;Changsun Choi;Jihyun Lee
    • Journal of Food Hygiene and Safety
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    • v.39 no.5
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    • pp.436-443
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    • 2024
  • Tetrodotoxin (TTX) is a potent neurotoxin responsible for pufferfish poisoning. The tissue distribution of TTX and its analogs in Takifugu porphyreus pufferfish sold in the Korean market was determined using ultra-high-performance liquid chromatography coupled to triple quadrupole mass spectrometry in multiple reaction monitoring mode. The method detection limit for TTX was 0.006-0.009 mg/kg in high-fat and low-fat matrices. The intra-day (n = 5) and inter-day (3 days, n = 15) accuracy and precision results met the Codex guidelines. The ovaries of T. porphyreus pufferfish showed higher levels of TTX (up to 67.7 mg/kg) and its analogs compared to other tissues. Lower levels of TTX (non-detectable to 1.10 mg/kg) were found in the muscle and testis tissues, usually the edible parts of the pufferfish, than in other tissues. TrideoxyTTX was the major TTX analog across all tissues. This study contributes to the database of marine toxicity information on T. porphyreus species sold in Korea.

Length-weight Relationships for 19 Fish Species in Sargassum Beds of Gamak Bay, Korea

  • Yoon, Ho-Seop;Choi, Sang-Duk
    • Fisheries and Aquatic Sciences
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    • v.13 no.3
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    • pp.254-256
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    • 2010
  • Length-weight relationships were estimated for 19 fish species in sargassum beds of Gamak Bay: Aulichthys japonicus, Pseudoblennius cottoides, Pseudoblennius percoides, Ditrema temmincki, Acanthogobius lactipes, Chaenogobius heptacanthus, Cryptocentrus filifer, Pterogobius elapoides, Pterogobius zonoleucus, Hyporhamphus sajori, Hexagrammos agrammus, Rudarius ercodes, Lateolabrax japonicus, Pholis crassispina, Pholis nebulosa, Scomber japonicus, Sebastes inermis, Ernogrammus hexagrammus, and Takifugu niphobles. Samples were caught by surrounding net at depths of <7 m between November 2007 and June 2008. The most abundant families were Gobiidae (26.3%), Cottidae (10.5%), and Pholididae (10.5%). Estimates for parameter b of the length-weight relationship (W=$aL^b$) ranged between 2.491 and 3.354.

Fish Assemblages in Sandy Shore of Myeongsa on Geoje Island, Korea (경남 거제 명사 사질연안의 어류군집에 관한 연구)

  • Kim, Jun-Sop;Lee, Dae-Hee;Park, Jun-Su;Han, Dong-Hun;Gwak, Woo-Seok
    • Korean Journal of Ichthyology
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    • v.24 no.1
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    • pp.11-19
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    • 2012
  • Seasonal fish species composition in the sandy shore adjacent to eelgrass bed was determined. Monthly samples were collected by a beam trawl from August 2009 to July 2010. A total of 38 species, 1,232 individuals and 5,277.7g of fishes were collected. The dominant species were $Favonigobius$ $gymnauchen$, $Takifugu$ $niphobles$, $Hypodytes$ $rubripinnis$, and $Rudarius$ $ercodes$. These four dominant fish accounted for 73.2% of the total number of individuals, and 53.9% of the biomass of collected fish. During the survey, the water temperature ranged from 11 to $25^{\circ}C$, and the salinity ranged from 29 to 35 psu. The monthly species diversity index showed the lowest value of 0.89 in March and highest value of 2.35 in June 2010. Fish species composition and abundance in Myeongsa sandy shore, were similar to that the adjacent eelgrass bed, but were different from those of Gujora sandy shore open the sea.

Comparative Analysis of Fish Community Structure between Eelgrass (Zostera marina L.) Beds and an Adjacent Unvegetated Area in Southern Korea

  • Kim, Jeong-Bae;Ryu, Jung-Hwa;Kim, Jin-Koo
    • Fisheries and Aquatic Sciences
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    • v.12 no.1
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    • pp.60-69
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    • 2009
  • Fish community structure between eelgrass beds and an adjacent unvegetated area was investigated. Fishes were collected monthly from two eelgrass beds (Gamak and Yeoja Bays) and one adjacent unvegetated area in the southern sea of Korea between February 2006 and February 2007. The number of species for the Gamak and Yeoja Bays were 33, 28, respectively, while 28 species were identified from the unvegetated area. Leiognathus nuchalis was dominant in both Gamak and Yeoja Bays, while Engraulis japonicus was dominant in the unvegetated area. Cluster analysis conducted on total number of individuals for each species produced 3 groups; group A (appeared only in winter regardless of eelgrass), group B (appeared in eelgrass beds during all seasons except winter) and group C (appeared in the unvegetated area during all seasons except winter). The most important differentiating species between eelgrass beds and the unvegetated area were Lateolabrax japonicus, L. nuchalis, Takifugu niphobles and Pholis nebulosa. Based on the results of this study we can assume that eelgrass beds function as a nursery ground for young fishes from spring to fall, but not in winter.

A Comparative Study on Limno-biological Aspects of the Dammed Lakes in the Youngsan River in Korea - Centering on Fish Fauna - (영산강 수계 댐호의 육수생물학적 비교연구 ( 1 ) - 어류상을 중심으로 -)

  • Nah, Chang-Soo
    • The Korean Journal of Ecology
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    • v.12 no.1
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    • pp.51-65
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    • 1989
  • Some aspects of limno-biology of the five dammed lakes such as Tamyang, Changsong, Kwangju, Naju, and Youngsan Lake along the Yongsan River were investigated from June 1986 to July 1988 for the comparison on the lentic ecosystems in relation to the fish fauna. Sixty four fish species representing 48 genera and 21 families of fishes were collected in these dammed areas, which included 29 species of the family Cyprinidea and 40 speaies of the primary fresh-water fishes. Among, these, 12 species such as Rhodeus Acheilognothus yamatsutae, A canathorhodeus gracilis, Sarcocheilichthys nigripinis morii, S. variegatus wakiyae, Gnathopogon strigatus, Squalidus gracilis majimae, Microphysogobio yaluensis, Cobitis longicorpus sp, Liobagrus mediadiposalis and Odontobutis platycephala are enddmic to Korea. Leiocassis nitidus and Gasterosteus aculeatus which occur in these water areas take note of the zooge rographic study of Korea. The fish species in each of the dammed lakes is in proportion of the scale of the lakes such as 32 species in Thamyang, 40 species in Changsong, 24 species in Kwangju, 35 species in Jaju, and 52 species in Yongsan Lake. The dominant fish species of the 4 upper dammed lakes of Thamyang, Changsong, Kwangju and Naju Lake are Zacco platypus and Rhodeus uyekii, while those of Youngsan Lake are Hemiculter eigenmanni and Carassius auratus. This difference of fish species of those areas suggests that the upper damed lake differ from the lower dammed lakes in the habitable condition of fishes. The migratory fish species have significantly declined and will continue to decline in both population size and number of species in the dammed lakes in near future as a result of the dam construction barriers in the river estuary. The major migratory fishes of this water area are as follows; Anguilla japonica, Plecoglossus altivelis, Hypomesus olidus, Gasterosteus aculeatus, Konosirus Punctatus, Coilia ectens, Hemirhampus sajori, Mugil cephalus. Acanthogobius flavimanus, and Takifugu ocellatus.

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Species Composition and Seasonal Variation of the Fishes off Koheung Peninsula, Korea (고흥반도 주변 해역에 분포하는 어류(魚類)의 종조성 및 계절변동)

  • Han, Kyeong-Ho;Yang, Keun-Seok;Jin, Dong-Soo;Yoo, Dong-Jae;Oh, Sung-Hyun;Hwang, Dong-Sik
    • Korean Journal of Ichthyology
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    • v.13 no.2
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    • pp.143-157
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    • 2001
  • To determine seasonal fluctuations in abundance and species composition of the fishes, samples were collected by bottom trawl off Kohung Penisula from February to December 1999. A total of 7,197 fishes were sampled and identified into 123 species, 54 families, 13 orders and 2 classes. Of the 13 orders, Perciformes, Scorpaniformes, Pleuronectiformes and Tetraodontiformes accounted for approximately 82.9% of the total. Gobiid fishes were dominant, representing 13 species. Leiognathus nuchalis, Konosirus punctatus, Engraulis japonicus, Ilisha elongata, Trichiurus japonicus, Argyrosomus argentatus, Ditrema temmincki, Takifugu niphobles, Hexagrammos otakii and Lateolabrax japonicus accounted for 71.4% of the number of individuals. Mugil cephalus, Sebastes schlegeli, Lateolabrax japonicus, Konosirus punctatus, Hexagrammos otakii, Conger myriaster, Liparis tanakai, Seriola quinqueradiata, Trichiurus japonicus, Sebastiscus marmoratus and Limanda yokohamae accounted for 50.7% of the total biomass. The number of species showed a seasonal variation, higher in spring, summer and autumn than in winter. The Largest numbers of individuals and greater biomass were observed in August. The economic fishes of this area were Konosirus punctatus, Engraulis japonicus, Mugil cephalus, Sebastes inermis, Sebastes schlegeli, Sebastes oblongus, Sebastiscus marmoratus, Platycephalus indicus, Hexagrammos agrammus, Hexagrammos otakii, Lateolabrax japonicus, Epinephelus akaara, Epinephelus septemfasciatus, Seriola quinqueradiata, Pagrus major, Acanthopagrus schlegeli, Argyrosomus argentatus, Oplegnathus fasciatus, Trichiurus japonicus, Pampus echinogaster, Paralichthys olivaceus, Kareius bicoloratus, Limanda yokohamae and Takifugu porphyreus.

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The Patterns of Oxygen Consumption In Six Species of Marine Fish (해산어류 6종의 산소소비 경향에 관한 연구)

  • KIM Il-Nam;CHANG Young-Jin;KWON Joon-Yeong
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.28 no.3
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    • pp.373-381
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    • 1995
  • Oxygen consumption of marine fishes according to different water temperatures, fish population densities and body weights was measured in the respiratory chamber for the following six species: the olive flounder Paralichthys olivaceus, the tiger puffer Takifugu rubripes, the rockfish Sebastes schlegeli, the sea bass Lateolabrax Japonicus, the red seabream Pagrus major and the black seabream Acanthopagrus schlegeli. Also the lethal concentration of dissolved oxygen in them was determined. Oxygen consumption in each fish species increased as the water temperature increased. The relationship between the oxygen consumption rate $(Oc,\;ml/kg{\cdot}\;hr)$ and the water temperature (T,$^{\circ}C$) for each species appeared as the following equations demonstrate; olive flounder: Oc=34.0515T-339.5987 $(r^2=0.9730)$, tiger puffer: Oc=34.4941T-479.8732 $(r^2=0.9483),$ rockfish: Oc=44.7970T-634.2627 $(r^2=0.9718),$ sea bass: Oc=26.1488T-318.0633 $(r^2=0.9316),$ red seabream: Oc=61.1020T-722.8926 $(r^2= 0.9805),$ black seabream: Oc=75.1460T-947.9370 $(r^2=0.9392).$ The of gen consumption of fish with different population densities decreased as the number of fish increased. As the body weight of the olive flounder increased, the mass-specific oxygen consumption decreased. The relationship between oxygen consumption and body weight (W; g) was expressed as Oc=2532.0268W-0.6565 $(r^2=0.9229)$. The levels of lethal dissolved oxygen in the olive flounder, rockfish, tiger puffer and red seabream were 0.66, 0.79, 0.75 and 1.36 m1/1, respectively.

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