Siniperca Scherzeri Research Articles

어분 및 빙어 첨가가 쏘가리(Siniperca scherzeri)의 성장, 혈액성상 및 체조성에 미치는 영향

This study investigated the effect of addition of fish meal and smelt on the growth, blood content and body composition of mandarin fish, Siniperca scherzeri. Six diets were formulated to contain 0 (CD), 15 (FM15), 30 (FM30), 45 (FM45) and 60% (FM60) fish meal, and 50% pond smelt (PS). Two replicates groups of fish (average weight of 114 g) were fed one of the six experimental diets twice daily for 10 weeks. At the end of the feeding trial, weight gain and specific growth rate of fish fed the FM45, FM60 and PS diets were higher than those of fish fed the other diets. Feed efficiency of fish fed the FM45 were higher than those of fish fed the CD, FM15 and FM 30 diets, were not affected by FM60 and PS diets. Body composition and blood chemical composition of fish were not affected by diets. These results indicate that mandarin fish require high protein level in diet for growth and feed efficiency. Therefore, the best diets for mandarin fish were add to fish meal 45% or pond smelt 50% in commercial diets.

Dietary protein requirement for juvenile mandarin fish, Siniperca scherzeri

An 8‐week feeding trial was conducted to investigate the dietary protein requirement of juvenile mandarin fish, Siniperca scherzeri, a demersal freshwater piscivore with high commercial value in East Asia. Five isolipidic (100 g/kg) and isoenergetic (20 MJ/kg) practical diets were formulated to contain graded levels of 450, 500, 550, 600, and 650 g/kg crude protein, using mackerel fishmeal as the sole source of protein. Each of the five test diets was fed to visual satiety to triplicate groups of fish (initial mean body weight ± SE; 20.1 ± 0.2 g) reared in a recirculating freshwater system over the experimental period. Fish growth performance in terms of weight gain tended to improve with increasing dietary protein level, and the highest values were observed in those fish fed the 600–650 g/kg diets. Feed intake significantly declined as the protein content of the diet increased. Feed efficiency and protein retention tended to increase with increasing dietary protein levels, from 450 to 600 g/kg, and then declined when dietary protein content further increased to 650 g/kg. A similar trend was also found for the protein efficiency ratio, although the observed changes did not reach statistical significance. Whole‐body composition and plasma biochemical parameters were not significantly affected by the dietary protein content. Based on these findings and a broken‐line model of growth, 614.4 g/kg seems to be the proper amount of protein in a practical diet for >20 g mandarin fish.

Effects of dietary inclusion of yellow mealworm (Tenebrio molitor) meal on growth performance, feed utilization, body composition, plasma biochemical indices, selected immune parameters and antioxidant enzyme activities of mandarin fish (Siniperca scherzeri) juveniles

A feeding trial was designed to examine the potential of yellow mealworm, Tenebrio molitor, as a locally available renewable protein source in juvenile mandarin fish feed. Triplicate groups of fish (Initial mean body weight ± S E.; 20.8 ± 0.05 g) were assigned to each of four isonitrogenous (50%) and isocaloric (22 MJ kg−1) practical diets containing graded level of a full fat yellow mealworm meal (WM) (0, 10, 20, and 30%) at the expense of fish meal (FM) (designated as WM0, WM10, WM20, and WM30). Each group of 20 fish were housed in a 60-L aquarium connected to a closed freshwater recirculating system, with a delivery rate of about 2 L min−1, and fed twice daily to apparent satiation for a period of 8 weeks. The results revealed that fish growth rates and efficiency of nutrient utilization tended to increase with increasing dietary WM levels from 0 to 20%, and then declined as dietary WM level further increased from 20 to 30%, with the most pronounced effect observed in those of fish fed the WM20 diet. Plasma total cholesterol contents were significantly reduced in fish fed the diet with the highest WM level (WM30). Fish carcass composition did not show any definite pattern of change due to feed composition. Fillets of juvenile mandarin fish fed diets containing WM in place of FM had much higher levels of saturated and monounsaturated fatty acids and lower levels of n-3 polyunsaturated fatty acids (PUFA) than those fed WM-free control diet (WM0). Serum lysozyme and glutathione peroxidase (GPx) activities were found to be significantly higher for fish fed the WM30 diet compared with fish fed WM0 diet. Overall, the efficacy of WM as alternative dietary protein source for juvenile mandarin fish has been proved not only in relation to weight gain and efficiency of feed utilization, but also the view point of health-promoting effects in fish.

소양호에 서식하는 쏘가리 Siniperca scherzeri의 성숙과 산란 특성

소양호에 서식하는 쏘가리 Siniperca scherzeri의 성숙과 산란 특성

A natural infection by the red sea bream iridovirus-type Megalocytivirus in the golden mandarin fish Siniperca scherzeri.

An outbreak of a Megalocytivirus infection was found in the golden mandarin fish Siniperca scherzeri during September and October 2016, in Korea. Phylogeny and genetic diversity based on the major capsid protein (MCP) and adenosine triphosphatase (ATPase) genes showed a new strain. Designated as GMIV, this strain derived from the golden mandarin fish was suggested to belong to the red sea bream iridovirus (RSIV)-subgroup I. Additionally, this train clustered with the ehime-1 strain from red sea bream Pagrus major in Japan and was distinguished from circulating isolates (RSIV-type subgroup II and turbot reddish body iridovirus [TRBIV] type) in Korea. The infection level, evaluated by qPCR, ranged from 8.18×102 to 7.95×106 copies/mg of tissue individually, suggesting that the infected fish were in the disease-transmitting stage. The diseased fish showed degenerative changes associated with cytomegaly in the spleen as general sign of Megalocytivirus infection. The results confirm that the RSIV-type Megalocytivirus might have crossed the environmental and species barriers to cause widespread infection in freshwater fish.

Effects of Formulated Diet Co-fed with Minced Fish on Growth, Digestion, Metabolism, and Appetite Regulation, of Mandarin Fish Hybrid (Siniperca chuatsi ♀× Siniperca scherzeri ♂)

This study examined the effects of a formulated diet combined with minced fish at ratios of 1:1 (Diet 1), 1:3 (Diet 2) and 0:1 (Diet 3) on growth, digestion, metabolism, and appetite of juvenile mandarin fish (initial weight, 10.63 ± 0.29 g). Fish were hand fed to satiation for 194 days. Weight and growth rate of the fish in the first 97 days were negatively correlated to decreased ratio of minced fish. The weight of fish fed Diet 2 (97 days) was significantly higher than that of fish fed Diet 1. There was no significant difference in the growth of fish fed Diets 2 or 3. The activities of pepsin in the stomach, alanine transminase (ALT), and aspartate transminase (AST) in the liver, significantly increased in relation to the enhanced formulated diet ratio. The mRNA level of leptin in the liver and ghrelin in the stomach increased as the minced fish ratio decreased. The mRNA level of neuropeptide Y (NPY) in the brain increased as formulated diet ratios increased. Combined feeding strategies increased the appetite of the mandarin fish hybrid, improved digestion and metabolism of formulated diets, and improved fish growth.

Osteological Development of the Larvae and Juveniles in Aucha Perch Coreoperca kawamebari (Perciformes: Centropomidae) in Korea

Osteological Development of the Larvae and Juveniles in Aucha Perch Coreoperca kawamebari (Perciformes: Centropomidae) in Korea

사료내 어분함량에 따른 1년생 및 2년생 쏘가리(Siniperca scherzeri)의 성장

사료내 어분함량에 따른 1년생 및 2년생 쏘가리(Siniperca scherzeri)의 성장

Food Conditions and Water Salinity Affect Survival and Growth of Golden Mandarin Fish, Siniperca sherzeri, Larvae through Transcriptional Regulation of Growth and Lipometabolic Genes

AbstractFailing to initiate first feeding during the transition from endogenous nutrition to exogenous feeding will lead to starvation of fish larvae. However, little is known about the mechanism of first feeding selection of fish. Golden mandarin fish larvae (3 d after hatch, 2.05 ± 0.03 mg) were fed with four different foods for 7 d, including the following: M – Megalobrama amblycephala (prey fish larvae as natural food); S – surimi of M. amblycephala; A – Artemia (zooplankton); and MA –mixed M. amblycephala with Artemia (mixed food). Larvae fed with the mixed food achieved an appropriate balance between high survival and good growth through elevating the expression of growth genes (GH, IGF‐I, and IGF‐II) and fatty acid synthesis genes (FAD and ELO). Growth performance of fish fed with MA reared at different salinities (0, 5, and 10 ppt) was examined. The salinity of 5 ppt produced the best growth performance of the three salinity levels tested. Fish larvae adapted to high‐ or low‐salinity environments through increasing the expression of lipolysis genes (HSL, LPL, and HL). Therefore, both food type and salinity affect the growth, survival, and lipometabolism of golden mandarin fish larvae during initial feeding stage, and mixed food and 5 ppt salinity improved its survival and growth.

Effect of dietary protein and lipid level on growth, feed utilization, and muscle composition in golden mandarin fish Siniperca scherzeri

A feeding trial was designed to assess the effects of dietary protein and lipid content on growth, feed utilization efficiency, and muscle proximate composition of juvenile mandarin fish, Siniperca scherzeri. Six experimental diets were formulated with a combination of three protein (35, 45, and 55%) and two dietary lipid levels (7 and 14%). Each diet was fed to triplicate groups of fish (8.3 ± 0.1 g) to apparent satiation for 8 weeks. The results showed that growth performance in terms of weight gain (WG) and specific growth rate (SGR) increased with increasing dietary protein level from 35 to 55% at the same dietary lipid level. At the same dietary lipid content, WG and SGR obtained with diets containing 55% protein was significantly higher than those obtained with diets containing 45 and 35% protein. No significant effect on growth rate was found when the dietary level of lipid was increased from 7 to 14%. While the levels of protein and lipid in the diets had no significant effect on feed intake, other nutrient utilization efficiency parameters including daily protein intake (DPI), feed efficiency (FE), and protein efficiency ratio (PER) showed a similar trend to that of growth rates, with the highest values obtained with diets containing 55% protein. Muscle chemical composition was not significantly affected by the different dietary treatments for each dietary lipid or protein level tested. These findings may suggest that a practical diet containing 55% protein and 7% lipid provides sufficient nutrient and energy to support the acceptable growth rates and nutrient utilization of mandarin fish juveniles.

Effects of live and artificial feeds on the growth, digestion, immunity and intestinal microflora of mandarin fish hybrid (Siniperca chuatsi♀ × Siniperca scherzeri♂)

How to acclimate mandarin fish to eat artificial feeds has been always a challenge for researchers. The mandarin fish after hybridization (Siniperca chuatsi ♀ × Siniperca scherzeri ♂) could be fed artificial feeds which solved the problem to some extent. However, the growth performance, digestibility, immunity and intestinal microflora of mandarin fish hybrid fed artificial feeds need further study. One hundred and twenty fish of similar size (average weight, 19.5 ± 0.9 g) were randomly stocked into six 250-L aquariums and separately fed live baits (the control) or artificial feeds in triplicate for 70 days. The weight gain and special growth rate of fish fed artificial feeds were significantly lower than those of fish fed live baits (P < 0.05). The protease activities of stomach, liver and intestine in fish fed live baits were all significantly higher than those in fish fed artificial feeds. The activities of catalase and lysozyme, the content of glutathione in serum of fish fed live baits were all significantly higher than those in fish fed artificial feeds. However, the content of malondialdehyde in liver of fish fed artificial feeds was significantly higher than that in fish fed live baits. The dominant bacteria in both groups were Proteobacteria, Bacteroidetes, Planctomycetes, Cyanobacteria, Verrucomicrobia. However, live baits greatly affected the amount of beneficial and harmful bacteria of intestine in mandarin fish hybrid and broke the balance of intestinal flora.

Occurrence of a lethal ranavirus in hybrid mandarin (Siniperca scherzeri × Siniperca chuatsi) in Guangdong, South China

A novel ranavirus with features similar to largemouth bass virus (LMBV) was isolated and then characterized from a natural mass mortality of adult hybrid mandarin (Siniperca scherzeri×Siniperca chuatsi). The isolated LMBV-like iridovirus was designated as mandarin ranavirus (MRV)-GD1301. The results of artificial infection showed that MRV-GD1301 was highly virulent to hybrid mandarin juveniles, and 100% mortality was observed within 5days after infection via intraperitoneal injection. Moribund fishes typically have abnormally swollen abdomens with extremely severe ascites and exhibit exophthalmia. The characteristic clinical signs have been rarely recorded in other LMBV-associated fish diseases and other viral diseases in mandarin aquaculture. In contrast to the high lethality in hybrid mandarin, MRV-GD1301 showed avirulence to koi Cyprinus carpio, a susceptible fish species to LMBV-like koi ranavirus (KIRV) found recently in India. Our findings suggest that MRV is an emerging causative agent of mass mortality in mandarin species.

Effect of Stocking Density on the Growth and Body Composition of the Mandarin Fish Siniperca scherzeri

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, respectivel...

Growth and Body Composition of Mandarin Fish Siniperca scherzeri Reared at High Water Temperatures

Growth and Body Composition of Mandarin Fish Siniperca scherzeri Reared at High Water Temperatures

쏘가리(Siniperca scherzeri)의 시기에 따른 영양성분 변화

Seasonal variation in the composition and fatty acid, amino acid, cholesterol, and vitamin contents in the muscles of the mandarin fish Siniperca scherzeri, caught in Soyangho Lake, Korea, was studied. The moisture content was 74.5-78.7 g/100 g, lipids ranged between 1.06 and 4.23 g/100 g, protein between 18.5-20.7 g/100 g, and ash between 0.74 and 2.04 g/100 g. The moisture content was lowest in May and tended to increase from June to October. The highest protein levels occurred in May, which coincided with the timing of oocyte maturation, and then decreased at the beginning of spawning. The highest lipid levels occurred in May and November coinciding with the periods before spawning and hibernation. The ratio of EAA/NEAA was higher than the value recommended by FAO for an 'ideal' food protein. There were significant differences in Mg and Fe contents with spawning; they were highest in May. Contents of vitamin A and E were from not detected (ND) to <TEX>$17.1{\mu}g/100g$</TEX> and ND to 0.69 mg/100 g, respectively and were highest in November. The content of niacin tended to decrease in June and increased until November and hibernation. The cholesterol content was 14.9-78.9 mg/100 g; it decreased from March to July and then increased until November. In conclusion, there is potential for expanding the commercial utilization of the mandarin fish as a food resource.

Identification of species-specific microsatellite markers in three Siniperca species by RNA-Seq

Siniperca chuatsi, Siniperca kneri, and Siniperca scherzeri are three most important perciform aquaculture fish species in China. Due to their morphological similarities, it is difficult to distinguish them, especially at juvenile stage. Furthermore, interspecies hybridization between them has been performed for economic benefit, while makes species identification more difficultly. Therefore, species-specific genetic markers are needed for species identification among them. In this study, a total of 991 SSR primer pairs were identified in 8923 SSR-containing sequences (transcripts >1 kb) by RNA-Seq. Then, 566 loci were randomly selected for primer synthesis and 394 of which were successfully amplified in S. chuatsi. All the non-polymorphic loci (308) were evaluated among three Siniperca species, and 18 species-specific microsatellite markers were finally validated among three Siniperca species. These species-specific microsatellite markers would not only easily discriminate these three Siniperca species at juvenile stage, but also effectively monitor the statuses of hybridization and introgression for germplasm resources protection.

사육 수온에 따른 쏘가리(Siniperca scherzeri) 치어의 성장 및 체조성 변화

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&...

Length-weight and length-length relationships of four endemic fish species from the middle reaches of the Yangtze River basin, China

Summary Length–weight (LWR) and length–length relationships (LLR) were evaluated for four endemic fish species, including Hemibagrus macropterus Bleeker, 1870; Rhinogobio cylindricus Gunther, 1888; Rhinogobio typus Bleeker, 1871; and Siniperca scherzeri Steindachner, 1892, in the middle reaches of the Yangtze River basin. A total of 252 specimens were collected using gillnets and cast nets between November 2014 and January 2016. No information regarding length–weight and length–length relationships were reported previously in FishBase for these four endemic species.

The differentia of nitrogen utilization between fast growth individuals and slow growth individuals in hybrid ofSiniperca chuatsi(♀) × Siniperca scherzeri(♂) mandarin fish fed minced prey fish

Aquaculture ResearchVolume 48, Issue 8 p. 4590-4595 Short Communication The differentia of nitrogen utilization between fast growth individuals and slow growth individuals in hybrid of Siniperca chuatsi (♀) × Siniperca scherzeri (♂) mandarin fish fed minced prey fish Liwei Liu, Liwei Liu College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this authorXu-Fang Liang, Corresponding Author Xu-Fang Liang xufang_liang@hotmail.com College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaCorrespondence: X-F Liang, College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China. E-mail: xufang_liang@hotmail.comSearch for more papers by this authorJinguang Fang, Jinguang Fang College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this authorJiao Li, Jiao Li College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this author Liwei Liu, Liwei Liu College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this authorXu-Fang Liang, Corresponding Author Xu-Fang Liang xufang_liang@hotmail.com College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaCorrespondence: X-F Liang, College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China. E-mail: xufang_liang@hotmail.comSearch for more papers by this authorJinguang Fang, Jinguang Fang College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this authorJiao Li, Jiao Li College of Fisheries, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei, ChinaSearch for more papers by this author First published: 01 August 2016 https://doi.org/10.1111/are.13106Citations: 9Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume48, Issue8August 2017Pages 4590-4595 RelatedInformation

Complete mitochondrial genome of the endemic species Korean aucha perch Coreoperca herzi (Teleostei, Centrarchiformes, Sinipercidae)

In this study, we sequenced the complete mitochondrial genome of the endemic species Korean aucha perch Coreoperca herzi (Teleostei, Centrarchiformes, Sinipercidae). The mitogenome, consisting of 16 495 base pairs (bp), encoded 13 protein-coding genes (PCGs), 2 ribosomal RNAs (rRNAs), 22 transfer RNAs (tRNAs) and 2 non-coding region. The overall base composition of C. herzi is G + C: 46.3%, A + T: 53.7%, apparently with a slight AT bias. Phylogenetic analysis showed that the C. herzi was closed to Coreoperca kawamebari.