• Title, Summary, Keyword: mandarin fish

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Total replacement of dietary fish oil with alternative lipid sources in a practical diet for mandarin fish, Siniperca scherzeri, juveniles

  • Sankian, Zohreh;Khosravi, Sanaz;Kim, Yi-Oh;Lee, Sang-Min
    • Fisheries and aquatic sciences
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    • v.22 no.4
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    • pp.8.1-8.9
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    • 2019
  • A 12-week feeding trial was designed to evaluate the effect of total replacement of fish oil (FO) with terrestrial alternative oils on growth, feed utilization, body composition, hematological parameters, and fillet fatty acid profile of mandarin fish juveniles. Four iso-nitrogenous (56% crude protein) and iso-lipidic (13% crude lipid) practical diets were formulated. A control diet contained 6% FO and three other experimental diets were prepared by replacing FO with linseed oil, soybean oil, and lard (designed as FO, LO, SO, and lard, respectively). Each diet was randomly allocated to triplicate groups of 25 fish ($1.8{\pm}0.03g/fish$) in a circular tank. Complete replacement of FO by three tested alternative oils had no remarkable impact on growth performance, feed utilization efficiency, and morphological and hematological parameters of juvenile mandarin fish. However, daily feed intake was found to be significantly higher for fish fed the SO diet compared with those fed the FO and LO diets. Fish fed LO and SO diets exhibited significantly higher levels of the whole body lipid compared to fish fed diet containing FO. Fillet fatty acid composition reflected dietary fatty acid profile. The highest level of ${\alpha}$-linolenic acid, linoleic acid, and oleic acid was observed in fish fillet fed LO, SO, and lard, respectively. Although the eicosapentaenoic acid level of fish fillet fed diet FO was higher than other treatments, no significant difference was found in docosahexaenoic acid content among all dietary groups. The results of the present study clearly demonstrate that the complete replacement of FO in mandarin fish diets is achievable. These findings are useful in dietary formulation to reduce feed costs without compromising mandarin fish growth.

Effect of Water Temperature on Growth and Body Composition of Juvenile Mandarin Fish Siniperca scherzeri (사육 수온에 따른 쏘가리(Siniperca scherzeri) 치어의 성장 및 체조성 변화)

  • Kim, Yi-Oh;Lee, Sang-Min
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.49 no.5
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    • pp.607-611
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    • 2016
  • This study was conducted to investigate the effects of different water temperatures on growth, survival, biochemical composition, and blood physiological parameters of juvenile mandarin fish Siniperca scherzeri. Feed-trained juvenile fish were subjected to four water temperatures (20, 23, 26 and 29℃) with two replicate groups. The fish were fed to apparent satiation twice daily using a formulated diet containing 55% crude protein and 6% crude lipid. After the 8-week feeding trial, survival was >96% in all groups. Weight gain and feed efficiency of fish reared at 26 and 29℃ were higher than those reared at 20℃. The protein efficiency ratio, daily feed intake, and whole body proximate composition were not affected by water temperature. These results indicate that a suitable water temperature range for optimal growth and feed efficiency of juvenile mandarin fish is 26-29℃ under these experimental conditions.

Growth and Body Composition of Mandarin Fish Siniperca scherzeri Reared at High Water Temperatures (고수온(27-33℃)에서 사육한 쏘가리(Siniperca scherzeri) 치어의 성장 및 체조성 변화)

  • Kim, Yi-Oh;Lee, Sang-Min
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.6
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    • pp.756-761
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    • 2017
  • This study investigated the growth of juvenile mandarin fish Siniperca scherzeri, reared at high water temperatures. Feed-trained juvenile fish were reared at four water temperatures: 27, 29, 31, and $33^{\circ}C$. The fish were fed to apparent satiation twice daily using pelleted diet. After 10 weeks of feeding trial, the survival exceeded 98% in all groups. The weight gain of fish reared at $31^{\circ}C$ was higher than for fish reared at the other temperatures. The feed efficiency and protein efficiency ratio of fish reared at 29 and $31^{\circ}C$ were higher than for the fish reared at 27 and $33^{\circ}C$. The daily feed intake of fish reared at 27 and $33^{\circ}C$ was higher than for the 29 and $31^{\circ}C$ groups. The whole body moisture content of fish reared at $33^{\circ}C$ was higher than in the $27^{\circ}C$ group. The whole body crude protein and lipid contents of fish reared at $27^{\circ}C$ were higher than in the $33^{\circ}C$ group. The results indicate that suitable rearing water temperature was $31^{\circ}C$ for optimal growth and feed efficiency of juvenile mandarin fish under the experimental conditions.

Influence of Different Feeding Frequency on the Growth and Body Composition of Juvenile Mandarin Fish Siniperca scherzeri Reared in a Recirculating Aquaculture System (RAS) (사료 공급 횟수가 쏘가리(Siniperca scherzeri) 치어의 성장 및 체조성에 미치는 영향)

  • Kim, Yi-Oh;Oh, Sung-Yong;Lee, Sang-Min
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.53 no.4
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    • pp.538-543
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    • 2020
  • A feeding trial was conducted to investigate the effect of feeding frequency on the growth performance and body composition of juvenile mandarin fish Siniperca scherzeri. Triplicate groups of fish (initial fish weight, 7.5 g/fish) were fed to apparent satiation at one, two, three or four meals per day for 8 weeks. The results showed that weight gain of fish fed one meal per day was significantly (P<0.05) lower than those fish fed two, three or four meals per day. Feed efficiency of fish fed two meals per day was significantly (P<0.05) higher than other experimental groups. The plasma cholesterol content was significantly lower in fish fed one meal per day than those fed two, three or four meals per day. Consequently, we can conclude that feeding juvenile mandarin fish twice daily to apparent satiation is acceptable and sufficient to achieve good growth and feed efficiency, as fish performance was not remarkably enhanced when feeding increased from two to four times per day.

Studies on the Lipid of Aquatic Products(Part 5) -Comparison of flesh Lipid Composition of Some Fresh Water Fishes Mandarin Fish Korean Perch Cornet Fist and Cat Fish- (수산물의 지질에 관한 연구(제5보) -쏘가리, 꺽지, 누치 및 메기의 근육지질 조성의 비교-)

  • 하봉석;강동수
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.19 no.4
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    • pp.291-300
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    • 1990
  • The lipid compositions including fatty acid sterol lipid class and the lipid component of the total lipid extracted from the flesh of some fresh water fishes I. e. mandarin cornet cat fish and Korean perch were compared. The levels of total lipid of flesh tissues from the fresh water fishes were high(7.4%) in cat fish but low(1.4-2.2%) in mandarin fish Korean perch and cornet fish. On the contrary the content of unsaponifiable matters found in total lipid was low(2.6%) in cat fish but high(6.0%-6.5%) in mandarin fish Korean perch and cornet fish. Total lipids were mainly composed of triglyceride(74.6-86.5%) as major component in each sample and the other lipid components of total lipid e. g. polar lipid free fatty acids and free sterol were the minor components, The major fatty acids in total lipid of each sample were{{{{ {C }_{16 { }:_{ }0 } }}}}(19.6-29.2%) {{{{ {C }_{16 { }:_{ }1 } }}}}(17.3-30.7%) and {{{{ {C }_{18 { }:_{ }1 } }}}}(16.8-29.2%) and additionally it chiefly consisted of {{{{ {C }_{14 { }:_{ }0 } }}}} and {{{{ {C }_{18 { }:_{ }2 } }}}} Particularly the contents of polyenoic acids in total lipid of cat fish were higher than those of the other fish samples. The level of cholesterol in total lipid was low (8.3mg/g) in cat fish but were high(36.9-59.9mg/g) in mandarin fish Korean perch and cornet fish. The contents of fractionated neutral lipid(NL) were higher than those of polar lipid(PL) in each sample. Particularly phospholipid content in PL was low(6.0%) in cat fish but were high(23.1-36.3%) in mandarin fish Korean perch and cornet fish. Neutral lipids were mainly consisted of triglyceride(84.5-93.4%) as amjor component in each sample and the other lipid components of neutral lipid e, g, free fatty acids and free wterol were exhibited as a minor components, The fatty acid compositon of neutral lipids was very resembled to total lipids. The phospholipid in mandarin cornet and cat-fish were mainly composed of phosphatidyl serine(23.1-49.8%) and phosphatidyl choline(20.8-45.3%) The relatively higher amounts of phosphatidyl serine were observed in mandarine cornet and cat-fist than in Korean perch, But phosphatidyl ethanolamine(42.3%) and phosphatidyl choline (49.9%) were the main phospholipid in Korean perch. The extraordinary high content of phos-phatidyl ethanolamine compared to other fishes was characteristics in phospholipid composition of Korean perch. The major fatty acids in phospholipid of each sample were {{{{ {C }_{16 { }:_{ }0 } }}}} (38.3-46.5%) {{{{ {C}_{18 { }:_{ }0 } }}}}(14.2-21.7) and C16:1(11.6-13.8%) and additionally it chiefly consisted of C18:2, C18:0 and C17:0 The major fatty acids in glycolipid of each sample were C16:0(28.8-40.1%) C18:1(5.4-29.9%) C18:0(5.1-28.9%) and C16:1(8.2-20.1%) and additio-nally it chiefly consisted of C14:0 and C20:1.

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Effect of Stocking Density on the Growth and Body Composition of the Mandarin Fish Siniperca scherzeri (사육밀도에 따른 쏘가리(Siniperca scherzeri)의 성장 및 체조성 변화)

  • Lee, Sang-Min;Kim, Yi-Oh
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.6
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    • pp.762-769
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    • 2017
  • This study investigated the effects of stocking density on the growth of the mandarin fish Siniperca scherzeri, in small (1-year old, 50.2 g/fish) and large (2-years old, 173.1 g/fish) size (age) groups. Small and large fish groups were fed pelleted diets twice daily for 10 and 15 weeks, respectively. In the small group, at the end of the feeding, the weight gain of fish at a density of $4kg/m^3$ was lower than that of fish at densities of 3, 2 and $1kg/m^3$. However, fish stocking density did not affect feed efficiency. The daily feed intake of fish at a density of $4kg/m^3$ was lower than that fish at densities of 3, 2 and $1kg/m^3$. In the large fish group, the weight gain of fish at a density of $4.5kg/m^3$ was higher than that of fish at densities of 6, 3 and $1.5kg/m^3$. Again, fish stocking density did not affect feed efficiency. The daily feed intake of fish at a density of $4.5kg/m^3$ was higher than that of fish at densities of 6, 3 and $1.5kg/m^3$. Based on these results, the optimum stocking density for small (50.2 g/fish) and large (173.1 g/fish) mandarin fish is 3 and $4.5kg/m^3$, respectively.

Occurrence of Atypical Aeromonas Salmonicida in Mandarin Fish (SSOGARI: Korean Name) Siniperca Scherzeri (양식 쏘가리에서 Atypical Aeromonas Salmonicida의 발병)

  • Park, Seong-Bin;Nho, Seong-Won;Jang, Ho-Bin;Cha, In-Seok;Kim, Young-Rim;Ha, Mi-Ae;Kang, Sang-Chul;Kim, Jae-Hoon;Jung, Tae-Sung
    • Journal of Veterinary Clinics
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    • v.27 no.3
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    • pp.289-294
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    • 2010
  • Mandarin fish (SSOGARI: Korean name) has emerged as new aquaculture and aquarium fish among Korean native fish species. Unfortunately, this fish could not exempt from infectious agent invasion. As an epidemiological survey, high mortality of mandarin fish (Siniperca scherzeri) observed from a fish farm in Gyeongnam province of South Korea. The major macroscopic sign of the diseased fish was severe multifocal dermal ulceration. Histological observation revealed inflammation, necrosis and colonization of bacteria in various tissues. Seven bacterial isolates from the diseased fish were identified as Aeromonas salmonicida subsp. salmonicida (typical A. salmonicida) using API 20E and 20NE system. However, the polymerase chain reaction (PCR) assay using two different primers (AP and MIY) revealed that the bacterial strains were not typical A. salmonicida, but atypical A. salmonicida. This study demonstrates that PCR assay is a reliable method for the confirmation of atypical A. salmonicida in mandarin fish as compared to biochemical tests. Furthermore, this is the first account of extensive dermatitis in mandarin fish due to atypical A. salmonicida infection, which has high potential in aquaculture and aquarium fish among native fish species.

Mass Mortaliaty by Aeromonas hydrophila Inferction in the Production of the Korean Mandarin Fish Fingerling, Siniperca scherzeri (쏘가리 (Siniperca scherzeri) 치어 생산에 있어서 Aeromonas hydrophila 감염에 의한 대량 폐사)

  • 장선일;이완옥;이종윤;조지현;김신무;김강주
    • Journal of Aquaculture
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    • v.10 no.4
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    • pp.439-447
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    • 1997
  • A specific disease syndrome, which led to massive mortality on the Korean mandarin fish fingerling (Sinperca scherzeri) at Chongpyong Inland Fisheries Institute was atudied. The causetive agent isolated from the diseased fish was identified as Aeromonas hydrophila on the basis of biochemical and physiological characteristics. Infection experiments in the Korean mandarin fish fingerling, weighting 3-4 g with A. hydrophila were conducted by immersion, oral administration, intramuscular injection, and injection of the soluble extracellular products secreted from it. Motality rate was higher virulence in intramuscular injection group than other experimental groups. In injection group of the soluble extracellular products, all fish treated with high concentration ($8{\times}10^9$ cfu/ml) were repidly killed into 3-6 hrs. There results show that the Korea mandarin fish fingerling has high susceptibility to A. hydrophila.

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Studies on the Food from Fresh Water Fish -3. Composition in Amino Acids and Nucleotides of the Dorsal Muscle of Some Fresh Water Fishes, Sweet Fish, Cornet Fish, Mandarin Fish and Read Fish- (담수어(淡氷魚)의 식품학적(食品學的) 연구(硏究) -3. 은어, 누치, 쏘가리 및 밀어 배육(背肉)의 핵산관련물질(核酸關聯物質) 및 아미노산(酸) 조성(組成)-)

  • Sung, Nak-Ju;Lee, Eung-Ho;Ha, Bong-Seuk
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.13 no.2
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    • pp.163-168
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    • 1984
  • The composition of amino acids and the related compounds of nucleotides in the dorsal muscle of sweet fish Hemibarbus labeo, Mandarin fish Siniperca scherzeri and read fish Gobius similis was analyzed by amino acid autoanalyzer and high performance liquid chromatography. The result showed that IMP was dominant in the nucleotides of all the dorsal muscle of the fishes and a less amount of UMP, hypoxanthine and AMP was detected. In the free amino acid composition, the important amino acids were taurine and histidine in sweet fish, taurine, glycine and histidine in cornet fish, taurine, histidine and alanine in mandarin fish, taurine, proline and threonine in read fish, respectively, and in all the dorsal muscle of fishes, taurine was the dominant amino acid. In the amino acid compositions of the muscle protein, glutamic acid, glycine, aspartic acid and lysine were reached to 44.0% of total amino acids in sweet fish, glutamic acid, aspartic acid, lysine and glycine were 43.5% in cornet fish, glutamic acid, aspartic acid, lysine and leucine were 43.3%, 43.5% of total amino acids in mandarin fish and read fish, respectively. Glutamic acid was the dominant amino acid in all the fresh fishes.

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Early Gonadogenesis and Sex Differentiation of the Mandarin Fish Siniperca scherzeri (쏘가리 (Siniperca scherzeri)의 초기 생식소 형성 및 성분화)

  • Lee, Yoon-A;Lee, Byoung-Min;Choi, Kyong-Cheol;Park, Sang-Yong;Bang, In-Chul
    • Journal of Aquaculture
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    • v.18 no.2
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    • pp.76-80
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    • 2005
  • The early gonadal development and sex differentiation of the mandarin fish, Siniperca scherzeri was described from hatch to the 130th day post-hatch (DPH). Primordial germ cells were observed on the just hatched fry (5.10 mm in total length (TL)) and began to protrude into the peritoneal cavity between mesonephric duct and gut. The primordial gonad, with the formation of genital ridge, developed on the 8-10th DPH (10.77-12.47 mm TL). Ovarian differentiation was identified by the presence of ovarian cavity and meiotic oocytes from the 40th DPH (29.75 mm TL). Testicular differentiation was identified by the presence of spermatogonial cells with efferent duct also from the 40th DPH. Sex differentiation of the mandarin fish was identified as gonochoristic type.