South African Journal of Animal Science最新文献_第4页

Differential gene expression in the Longissimus dorsi of Nguni and Bonsmara bulls finished on low and high energy diets 低、高能日粮育肥期恩古尼和邦斯马拉公牛背最长肌基因表达差异

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v53i1.11

D. Linde, E. van Marle-Köster, M. M. Scholtz, M. Gonda, J. Gonzalez-Hernandez, M. MacNeil

{"title":"Differential gene expression in the Longissimus dorsi of Nguni and Bonsmara bulls finished on low and high energy diets","authors":"D. Linde, E. van Marle-Köster, M. M. Scholtz, M. Gonda, J. Gonzalez-Hernandez, M. MacNeil","doi":"10.4314/sajas.v53i1.11","DOIUrl":"https://doi.org/10.4314/sajas.v53i1.11","url":null,"abstract":"Objectives of this research were to examine differential gene expression profiles of Nguni and Bonsmara cattle fed diets differing in their energy density. The ultimate goal was to improve understanding of the mechanisms that underlie differences between these breeds and the potential interactions of the differences between breeds with the nutritive environment. The experiment was designed as a 2 × 2 factorial arrangement of breed and diet (12.5 MJ/kg DM vs. 10.9 MJ/kg DM). The initial feeding trial had 10 bull calves per treatment. However, financial constraints limited RNA sequencing to six animals per treatment and the RNA generated from one animal was of insufficient quality to be useful. Transcripts with false discovery rate P-values <0.05 and fold-changes >2.0 were considered significant. Bonsmara had a faster growth rate, heavier live and carcass weights, and better feed conversion compared to Nguni. However, lower levels of fat were observed in Nguni. Twenty different genes were differentially expressed, with three exhibiting interaction effects and all 20 having differences in transcript abundance between the breeds. A dietary effect was only observed for the one gene and that gene was also subject to an interaction effect with breed. Observed differences in gene expression between Bonsmara and Nguni by several genes affecting the structure or function of the mitochondria imply differences in energy metabolism between the breeds. Interaction effects on the abundance of some gene transcripts indicate the need to consider the diet when evaluating breed differences and conversely, consider breed when evaluating diets.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"17 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84458808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of chia gel incorporation as a fat substitute in Nile tilapia fishburger 罗非鱼汉堡中添加奇亚凝胶替代脂肪的评价

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i5.06

M. Rampe, F. C. Henry, R. F. Oliveira, A. C. Santos Júnior, A. M. Maradini Filho, Mia Dardengo

{"title":"Evaluation of chia gel incorporation as a fat substitute in Nile tilapia fishburger","authors":"M. Rampe, F. C. Henry, R. F. Oliveira, A. C. Santos Júnior, A. M. Maradini Filho, Mia Dardengo","doi":"10.4314/sajas.v52i5.06","DOIUrl":"https://doi.org/10.4314/sajas.v52i5.06","url":null,"abstract":"Chia gel is known for its functional properties such as high water and oil retention capacity, emulsifying activity, and as a stabilizer for foams and emulsions. Thus, the objective of this study was to evaluate the effect of the inclusion of chia gel as a substitute for pork fat in formulations of fishburgers made with Nile tilapia. Five formulations, one control and four with increasing levels of substitution of chia gel (12.50, 25.00, 37.50 and 50.00%) were evaluated. The fishburgers were characterized regarding their physicochemical composition, their technological characteristics, and microbiological viability. With the incorporation of the gel, there was a significant reduction in lipid component and the caloric value of the formulations, in addition to an increase in the percentage of dietary fibre. In addition, no negative effects were observed regarding yield and the main texture parameters studied. However, the formulations with the highest percentage replacement of pork fat by chia gel were darker when compared to the control treatment. Chia gel may be considered as a novel substitute for pork fat; however, it is recommended that techniques be employed to produce lighter gels, thus avoiding possible rejection by the consumer.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"81 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88984811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MC4R gene polymorphisms for classification of growth efficiency and carcass measurements in two rabbit breeds in Egypt MC4R基因多态性对埃及两种家兔生长效率分类和胴体测量的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i6.02

H. Radwan, A. Ateya, Eman A. Abo Elfad, Shimaa A. Sak, M. Fouda, R. Darwish, Adel E. El-Desoky

{"title":"MC4R gene polymorphisms for classification of growth efficiency and carcass measurements in two rabbit breeds in Egypt","authors":"H. Radwan, A. Ateya, Eman A. Abo Elfad, Shimaa A. Sak, M. Fouda, R. Darwish, Adel E. El-Desoky","doi":"10.4314/sajas.v52i6.02","DOIUrl":"https://doi.org/10.4314/sajas.v52i6.02","url":null,"abstract":"Melanocortin 4 receptor (MC4R), a protein derived from the MC4R gene, is involved in feed intake, metabolism control, and body weight regulation in humans. The purpose of this research was to explore MC4R polymorphisms alongside metabolic marker changes and their relationship with growth and carcass measurements in rabbits. Using synthetic line V (V-line) and Baladi Black rabbit breeds (60 rabbits per breed), blood samples were collected for DNA extraction and biochemical analysis. The polymerase chain reaction (PCR) product of MC4R (493 bp) revealed five nonsynonymous single nucleotide polymorphisms (SNPs; submitted to GenBank with accession numbers gb|MT832144|, gb|MT832145|, and gb|MT832146|). Four SNPs were characteristic of the V-line breed, and one was characteristic of the Baladi Black. For classification of the defined SNP-dependent groups within and between breeds, a discriminant analysis model correctly classified a percentage of cases with the following predictor variables: 90.8% for body weight at 5–14 weeks of age; 85% for feed consumption, daily feed intake, and feed conversion ratio; and 93.3% for carcass measurements (for which hind part weight, liver weight, and liver percentage were the best predictors in both breeds). There were significant differences between and within V-line and Baladi Black breeds in agreement with metabolic biochemical marker profiles and the defined SNPs. The identified SNPs in the MC4R gene and profile of the investigated metabolic biomarkers could be used as candidates and reference for the effective characterization of the two rabbit breeds. This study could therefore facilitate the introduction of markerassisted selection for growth performance characteristics in rabbits. ","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"130 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84649976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of lupin flake supplementation on rumen fermentation and meat composition of Hanwoo steers 添加罗苹片对汉宇阉牛瘤胃发酵及肉成分的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i5.01

K. Um, J.S. Shin, B. Park

{"title":"Effect of lupin flake supplementation on rumen fermentation and meat composition of Hanwoo steers","authors":"K. Um, J.S. Shin, B. Park","doi":"10.4314/sajas.v52i5.01","DOIUrl":"https://doi.org/10.4314/sajas.v52i5.01","url":null,"abstract":"Lupin is considered a potentially rich source of energy and protein for various livestock breeds. However, there are no studies on rumen fermentation and meat composition of Hanwoo (Korean native) steers following supplementation with lupin flakes. In vitro and in situ experiments of lupin flake-supplemented feed were conducted using three Hanwoo cows with rumen fistulae for four weeks. The feeding experiment was conducted using 40 early-fattening Hanwoo steers randomly divided into four groups for 14 months from 16 to 30 months of age, viz., T1, T2, T3, and T4, with feed containing 0%, 3%, 6%, and 9% lupin flakes, respectively. The pH of the ruminal fluid in vitro at 24 and 48 h was higher in T3 and T4 than T1. The rumen levels of acetate, propionate, butyrate, and total volatile fatty acids after 48 h of incubation were lower in the lupin-supplemented groups than in T1. The ruminal pH in situ after 9 and 12 h was higher in T3 than in T1. The strip loin in Hanwoo steers was lighter in T3 than in the other treatment groups. The levels of carnosine, creatinine, adenosine triphosphate, and adenosine monophosphate in the strip loin were higher in T3 and T4 than in T1. The levels of oleic acid and unsaturated fatty acids and the n-6/n-3 ratio tended to be higher in T3 than in T1. Supplementation of livestock feed with 6% lupin flakes had positive effects on ruminal pH and meat lightness, carnosine, creatinine, adenosine triphosphate, and adenosine monophosphate levels in Hanwoo beef.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"100 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81027791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship between the internal and external morphological parameters of honeybee queens (Hymenoptera: Apidae) and the determination of morphological variation 膜翅目:蜂科蜂王内外形态参数的关系及形态变异的测定

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v53i1.03

G. Ö. Özbakir

{"title":"The relationship between the internal and external morphological parameters of honeybee queens (Hymenoptera: Apidae) and the determination of morphological variation","authors":"G. Ö. Özbakir","doi":"10.4314/sajas.v53i1.03","DOIUrl":"https://doi.org/10.4314/sajas.v53i1.03","url":null,"abstract":"This study was carried out to determine the crucial external and internal morphological characteristics for evaluating queens in three rearing periods (May, June, and July). Data of 65 queens reared from the local honeybees of the Sanliurfa (Apis mellifera L.) and Anatolian (Apis mellifera anatoliaca) honeybee colonies were used. Discriminant and principal component analyses (PCA) were done for thirty-one external and internal morphological characteristics of queens. The highest weight of the queen at emergence was determined in May for the Sanliurfa queens and in June for the Anatolian queens. The averages in ovary weight and spermathecae diameter of queens were found to be non-significant according to groups and periods. The number of ovarioles of the queens was different according to rearing period. Using the left basitarsus width variable, the Sanliurfa and Anatolian queens were classified correctly to their pre-assigned groups using discriminant analysis (73.8%). According to the result of PCA applied to all variables of queens, nine components explained 81.68% of the total variation. The seven variables in the first principal component were the left basitarsus length, the right hindleg length, the left hindleg length, the right basitarsus length, the left tibial length, the right tibial length, and the left basitarsus width. The forewing and the hindwing characteristics were included in the second principal component, and the number of ovarioles was included in the third principal component. The study shows that genotypes can be discriminated using the hindleg variables, in particular, as well as the internal and external morphological parameters of the queens.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"86 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74013583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of formaldehyde treatment of canola oilcake meal and sweet lupins on the in situ dry matter and crude protein digestibility 甲醛处理菜籽油饼粕和甜羽扇豆对原位干物质和粗蛋白质消化率的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v53i1.10

T. S. Brand, J. V. Van Zyl, O. Dreyer

{"title":"The effect of formaldehyde treatment of canola oilcake meal and sweet lupins on the in situ dry matter and crude protein digestibility","authors":"T. S. Brand, J. V. Van Zyl, O. Dreyer","doi":"10.4314/sajas.v53i1.10","DOIUrl":"https://doi.org/10.4314/sajas.v53i1.10","url":null,"abstract":"The value of feed protein sources in ruminant nutrition is measured by how effectively the protein is degraded in the rumen and converted into microbial protein. High-producing ruminants acquire high nutritional requirements to sustain their metabolic demands for production and performance. However, protein sources occasionally fall short in supplying the required amount of rumen undegradable protein and amino acids. Chemical treatment (formaldehyde) could be used to increase the efficiency of protein sources, which are highly degradable in the rumen. Canola oilcake meal (CM) and sweet lupin seed (SL) were treated with formaldehyde (40% w/v) at concentrations of 10 g/kg (F10) and 15 g/kg CP (F15). In this study, six Dohne Merino wethers fitted with rumen cannulas were used to determine the effect of formaldehyde treatment on the in situ dry matter and crude protein digestibility. The treatments entailed CM control (CMF0), CM treated with 10 g/kg CP formaldehyde (CMF10), CM treated with 15 g/kg CP formaldehyde (CMF15), SL control (SLF0) SL treated with 10 g/kg CP formaldehyde (SLF10) and SL treated with 15 g/kg CP formaldehyde (SLF15). Treatments were incubated in the rumen at time intervals of 0, 2, 4, 12, 36, 48, 72, and 96 hours. Overall, formaldehyde treatment significantly decreased rumen degradation at all outflow rates of both CM and SL. Therefore, formaldehyde treatment could be used to increase the rumen undegradable protein fraction. Potential improvement in animal performance in terms of live weight gain, average daily gain, and feed conversion efficiency has to be evaluated in production studies.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"24 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85962731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Addition of equine chorionic gonadotropin in controlled internal drug-release-based synchronization improves reproductive performance of Nili-Ravi buffalo in the sub-tropics 马绒毛膜促性腺激素在控制内药物释放同步的基础上，提高了nli - ravi水牛在亚热带地区的生殖性能

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i4.05

M. Naveed, M. Hassan, A. Husnain, U. Riaz, M. Ahmad, M. Yousuf, N. Ahmad

{"title":"Addition of equine chorionic gonadotropin in controlled internal drug-release-based synchronization improves reproductive performance of Nili-Ravi buffalo in the sub-tropics","authors":"M. Naveed, M. Hassan, A. Husnain, U. Riaz, M. Ahmad, M. Yousuf, N. Ahmad","doi":"10.4314/sajas.v52i4.05","DOIUrl":"https://doi.org/10.4314/sajas.v52i4.05","url":null,"abstract":"This study evaluated the effect of equine chorionic gonadotropin (eCG) and factors such as body condition score (BCS), cyclicity, and breeding season in a controlled internal drug release (CIDR)-based oestrus synchronization protocol on ovarian follicle dynamics, oestrus expression, ovulation rate, and pregnancy per artificial insemination (AI) (P/AI) in Nili-Ravi buffalo. Adult buffaloes (n = 88), 6.69 ± 1.17 years, parity 3.36 ± 0.97, and BCS 2.76 ± 0.45, were randomly administered eCG or saline, concurrent with prostaglandin F2α (PGF2α) treatment on Day 6 in a CIDR synchronization protocol during the breeding season and low breeding season. Follicular dynamics and oestrus expression were recorded from eCG administration until ovulation. Fixed-time artificial insemination (FTAI) was performed at 48- and 60-hour intervals after CIDR withdrawal. On Day 35 post-AI, pregnancy was diagnosed with ultrasonography. There was no significant difference in the size of the ovulatory follicle between eCG-treated buffaloes (ETB) and saline-treated buffaloes (STB). The growth rate of the dominant follicle, oestrus response and intensity, ovulation, and P/AI were higher (P <0.05) in eCG-treated buffaloes. It was concluded that eCG improved the growth rate of the dominant follicle, oestrus expression, and P/AI in a CIDR-based FTAI programme in Nili-Ravi buffalo. The deleterious effects of poor BCS, acyclicity, and low breeding season could be reduced with a progesterone-based fixed time AI protocol with the addition of eCG.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"63 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84513010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of various pH levels on the sperm kinematic parameters of boars 不同pH值对公猪精子运动参数的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i5.13

Cindy Rivas, M. E. Ayala, Andrés Aragón

{"title":"Effect of various pH levels on the sperm kinematic parameters of boars","authors":"Cindy Rivas, M. E. Ayala, Andrés Aragón","doi":"10.4314/sajas.v52i5.13","DOIUrl":"https://doi.org/10.4314/sajas.v52i5.13","url":null,"abstract":"The objective of this work was to identify the effects of pH on the structure of kinematic sperm subpopulations using commercial doses of boar semen diluted in Androstar Plus extender. We adjusted the pH value of the diluted semen samples to 7.4, 7.6, 7.8, and 8.0, and evaluated motility parameters using an open-source computer-assisted sperm analysis system. We evaluated the dataset of the kinematic parameters of the individual sperm for the effects of pH on the average values overall and on the subpopulations of sperm. To identify these subpopulations, we reduced the dimensionality of the dataset through principal component analysis followed by hierarchical clustering. We then compared the results for the kinematic parameters across the dataset and in the subpopulations with the average of the corresponding control (i.e., the basal pH value). We found that increasing the pH did not affect the proportion of motile sperm but did affect the manner in which they moved, rendering their movement more linear. The progressive motility increased relative to the control at all pH values above 7.1, while the proportion of sperm with low motility increased at pH 7.8. We distinguished three sperm subpopulations. The proportion of sperm in Subpopulation 1 increased at pH values of 7.8 and 8.0, with the sperm being characterized by low velocity and high values for linearity. The sperm in Subpopulation 3, by contrast, were relatively few but showed relatively high curvilinear velocity. In this study, we demonstrated the presence of subpopulations of boar sperm that responded differentially to changes in pH.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"43 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87289918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pre-rut behavioural changes in farmed red deer with reference to atmospheric conditions 养殖马鹿在发情期前的行为变化与大气条件有关

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i6.10

K. Tajchman, P. Janiszewski, Ż. Steiner-Bogdaszewska, F. Ceacero

{"title":"Pre-rut behavioural changes in farmed red deer with reference to atmospheric conditions","authors":"K. Tajchman, P. Janiszewski, Ż. Steiner-Bogdaszewska, F. Ceacero","doi":"10.4314/sajas.v52i6.10","DOIUrl":"https://doi.org/10.4314/sajas.v52i6.10","url":null,"abstract":"Red deer (Cervus elaphus) exhibit specific behaviour during the rutting season, which may have an impact on the safety on cervid farms, both due to aggressive interactions between animals and the safety of people staying there, such as staff and tourists. This issue applies especially to stags whose behaviour changes radically, and the correct interpretation of the observed changes is very important. Therefore, the aim of the study was to analyse the pre-rut behaviour of stags and to show the influence of atmospheric conditions on vocalization and other elements of their behaviour, which facilitate determination of the onset of the rutting season. The observations were conducted in August and September of 2017 and 2018. It was shown that lower temperatures, declines in air humidity, increasing atmospheric pressure, and transition of the moon phase towards the full moon resulted in intensification of the vocalization activity in the red deer in the pre-rutting season, which may accelerate the rutting period in the deer males. The number of vocalizations varied between the years and depended on the mean temperature, air humidity, atmospheric pressure, and moon phase in the prerutting and rutting seasons. Through observation of the changing weather conditions, it is possible to predict the time of increased activity of stags and the onset of the rutting period. Predicting the date of mating season in farm breeding, based on daily observations of changes in the behaviour of stags, can be helpful in planning veterinary treatments or selecting the composition of the hinds to be covered by specific stags, which can also contribute to the improvement of their welfare.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"1 4 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77111825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does dietary inclusion of defatted yellow mealworm (Tenebrio molitor) affect growth and body composition of juvenile common carp (Cyprinus carpio)? 饲料中添加脱脂黄粉虫是否会影响鲤鱼幼鱼的生长和体成分?

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2023-04-17 DOI: 10.4314/sajas.v52i4.04

A. Gebremichael, Z. Sándor, B. Kucska

{"title":"Does dietary inclusion of defatted yellow mealworm (Tenebrio molitor) affect growth and body composition of juvenile common carp (Cyprinus carpio)?","authors":"A. Gebremichael, Z. Sándor, B. Kucska","doi":"10.4314/sajas.v52i4.04","DOIUrl":"https://doi.org/10.4314/sajas.v52i4.04","url":null,"abstract":"The objective of this study was to evaluate the effects of total and partial replacement of fishmeal with defatted yellow mealworm (Tenebrio molitor) meal on one-summer-old common carp (Cyprinus carpio) with an initial bodyweight of 97.54 g ± 51.0 g. Fish were kept in an experimental recirculating aquaculture system (9 x 250 L tanks) and fed with two experimental diets formulated with mealworm meal replacements and one control, which had 100 g/kg fishmeal without mealworm meal (MWM0). In the first treatment, 50% of fishmeal was replaced with mealworm meal (MWM50). In the second treatment, fishmeal was replaced totally with mealworm meal (MWM100). Fish were fed three times per day at 3.0% of fish biomass. After six weeks of the experimental period, growth performance, nutrient utilization, body composition, and biometric indices were compared. The results revealed that the growth performance of common carp was not affected significantly by the inclusion level of mealworm meal. However, the highest weight gain was observed in MWM100, where specific growth rate was 0.76 ± 0.10 g/day. Crude fat content of the fish body differed significantly between experimental groups and the control. This investigation demonstrated that MWM could be used as an alternative dietary protein source to replace fishmeal without adverse effects on the growth performance of one-summer-old common carp.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"29 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87542891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2