Cultured Fish
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2021 ◽  
Vol 22 (19) ◽  
pp. 10436
Author(s):  
José Ramos-Vivas ◽  
Joshua Superio ◽  
Jorge Galindo-Villegas ◽  
Félix Acosta

Therapeutic bacteriophages, commonly called as phages, are a promising potential alternative to antibiotics in the management of bacterial infections of a wide range of organisms including cultured fish. Their natural immunogenicity often induces the modulation of a variated collection of immune responses within several types of immunocytes while promoting specific mechanisms of bacterial clearance. However, to achieve standardized treatments at the practical level and avoid possible side effects in cultivated fish, several improvements in the understanding of their biology and the associated genomes are required. Interestingly, a particular feature with therapeutic potential among all phages is the production of lytic enzymes. The use of such enzymes against human and livestock pathogens has already provided in vitro and in vivo promissory results. So far, the best-understood phages utilized to fight against either Gram-negative or Gram-positive bacterial species in fish culture are mainly restricted to the Myoviridae and Podoviridae, and the Siphoviridae, respectively. However, the current functional use of phages against bacterial pathogens of cultured fish is still in its infancy. Based on the available data, in this review, we summarize the current knowledge about phage, identify gaps, and provide insights into the possible bacterial control strategies they might represent for managing aquaculture-related bacterial diseases.


Author(s):  
Onkar Singh Brraich ◽  
Navpreet Kaur ◽  
Swarndeep Singh Hundal

Fish production and fish processing waste have straight connection.  In India, the waste produced during the processing of fish is predicted to be approximate 3.6 million metric tonnes, 48 per cent of the total body weight of Indian and exotic major carps is thrown away as waste (non-edible ). The present research, it was conducted to compare the total lipid content (TLC) and fatty acid composition from the liver of captured and cultured fish, Labeo rohita  (Hamilton) having weight more than 500 gram during different months as well as to evaluate its nutritional quality. Maximum total lipid content (33.33±0.14%) was found in the liver of cultured fish in May month, while the minimum (15.26±0.24%) was in the liver of captured fish in the month of January. During the study, total lipid content was found to be considerably elevated in cultured than captured Fish, Labeo rohita  (Hamilton). The amount of three major groups of fatty acids namely polyunsaturated fatty acids, monounsaturated fatty acids and saturated fatty acids was found to be maximum in captured fish during the month of March 97.19±0.96%, 61.30±0.56% and 95.39±0.31% month of April respectively. Total n-6 polyunsaturated fatty acids were observed to be highest (21.95±8.05%) in the waste of liver in cultured fish during the month of March. Hence, it is concluded that the processing waste (liver) of the captured and cultured, Labeo rohita (Hamilton) is a prosperous resource of the essential fatty acids i.e.  PUFAs and total lipids. Further, it is observed that captured species are rich in fatty acid composition as compared to cultured species. Food industries can manufacture by-products from these high nutritional value contents of   waste for human utilization. EPA and DHA also reduce the risk of various life threatening diseases.


Author(s):  
G. D. Thilini Madurangika Jayasinghe ◽  
Paloma Herbello-Hermelo ◽  
Raquel Domínguez-González ◽  
Pilar Bermejo-Barrera ◽  
Antonio Moreda-Piñeiro
Keyword(s):  
In Vitro ◽  

10.4194/ga385 ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Ahmet Bingöl ◽  
Akif Er ◽  
Zeynep Zehra İpek ◽  
Şevki Kayış

This study investigated the bacteria present in natural and cultured fish species from the same aquatic system, and difference of their antibiotic resistance. A total of 129 fish, Georgian shemaya (Alburnus derjugini), black sea salmon (Salmo labrax) and rainbow trout (Oncorhynchus mykiss), were sampled on a monthly basis between the months of October 2016 and September 2017 in Kürtün Dam Lake. A total of 41 bacterial isolates were isolated from the fishes. The bacterial species were identified by molecular methods (PCR) using universal primers for bacteria. Acinetobacter lwoffii, Acinetobacter sp., Aeromonas sobria, and Pseudomonas sp. were isolated from both wild and cultured fish. Yersinia ruckeri was isolated from cultured fish, which showed severe mortality rate and typical symptoms. Various antibiotics including ampicillin (AMP10µg), gentamicin (CN10 µg), oxytetracycline (T30 µg), amoxicillin/clavulanic acid (AMC10µg), enrofloxacin (ENR5µg), trimethoprim/sulfamethoxazol (TMP-SMZ25µg), florfenicol (FFC30µg), sulfamethoxazol (SMZ25µg) and erythromycin (E15µg) were used for determination of the bacterial resistances. The highest resistances were determined against ampicillin (56%), sulfamethoxazol (46.3%) and oxytetracycline (34.1) in all bacterial isolates. While the bacteria isolated from wild fish did not show resistance to enrofloxacin and amoxicillin/clavulanic acid, those from cultured fish did not show resistance to gentamicin and erythromycin.


Author(s):  
Amal Nassir ALKURAIEEF ◽  
Amnah Mohammed ALSUHAIBANI ◽  
Amal Hassan ALSHAWI ◽  
Nora Abdullah ALFARIS ◽  
Dalal Hamad ALJABRYN

2021 ◽  
Vol 48 (2) ◽  
pp. 365-378
Author(s):  
Mst Taslima Akter ◽  
Md Hasan Faruque ◽  
Md Rakibul Hasan ◽  
Mohammad Shamsur Rahman

The availability and compositions of foods in the aquatic system have a direct influence on nutritional compositions of fish muscle. This research aimed to determine the nutritional compositions of wild and cultured climbing perch, Anabas testudineus, between pre-monsoon and post-monsoon. The proximate compositions, total amino acid, and fatty acid profiles were determined by AOAC, HPLC and GC, respectively. The results in dicated that proximate (e.g., moisture, ash, protein and lipid), amino acid and fatty acid profile varied significantly (p<0.05) between wild and cultured fishes depend on season. The highest amount of moisture (79.62±0.92%) was found in wild A. testudineus and lowest amount of ash (2.50±0.09%) was found in cultured A. testudineus during pre-monsoon. For both cultured and wild A. testudineus, amount of protein was higher in post-monsoon than in pre-monsoon period. The protein and amino acids contents as well as lipid and fatty acids of the fish species showed a significant (p<0.05) seasonal variations. Among the 14 recorded amino acidsthe major amino acids in the total crude protein were histidine, methionine, isoleucine, lysine, glutamic acid, and glycine. The ratio of Essential Amino Acid (EA)/Non-Essential Amino Acid (NEA) was highest (0.34) in cultured fish of post-monsoon season and lowest (0.25) in wild fish of pre-monsoon season. The major fatty acid so wild and cultured A. testudineus were oleic acid (18:1), palmitic acid (16:0), linoleic acid (18:2), stearic acid (18:0), palmitoleic acid (16:1), andmyristic acid (14:0).Some fatty acids [Lauric acid (C12:0), Pentad cyclic acid (C15:0), Arachidic acid (C20:0)]were not detected in cultured fish but present in wild fish. The n-3/n-6 ratio was highest (0.48) in wild fish of post-monsoon season and lowest (0.14) in cultured fish of pre-monsoon season. Therefore, a comprehensive study on wild and cultured climbing perch is required for further confirmation of the result of the present study. Bangladesh J. Zool. 48(2): 365-378, 2020


Author(s):  
Ayandiran Tolulope Akinpelu ◽  
Ogundiran Mathew Akinloye ◽  
Ajala Olasunmbo Olumuyiwa ◽  
Opasola Olaniyi Afolabi ◽  
Olanipekun Abimbola Stephen

The nutritional qualities of wild and cultured Clarias gariepinus from Oba Reservoir, Ikose, Ogbomoso, Oyo State, Nigeria, and the cultured fish from the Department of Fisheries and Aquaculture, Oyo State Ministry of Agriculture and Mineral Resources, Ogbomoso, Oyo State, Nigeria, were evaluated. The proximate composition, mineral element composition and essential amino acids profile of the sampled fish species were evaluated using standard laboratory procedures. The results of the proximate composition was observed to be high in cultured population compared to the Wild and there was a statistical significant difference in the amount of crude protein, fibres, carbohydrate, fat/lipid, ash and moisture contents across the two sampled populations (Wild; 17.94 ± 0.19, Cultured; 21.06 ± 0.51), t = -5.738, p-value =0.001. Mineral element content showed maximum amount of copper (Cu), Lead (Pb), Manganese (Mn) and Iron (Fe) in Wild population than in their cultured counterpart while the amount of Cadmium (Cd) and Nickel (Ni) observed in Wild population were undetected. It was also discovered that all amino acid analysed were found to be higher in the cultured group compared to the wild. There were varied levels of significant correlations among all the measured amino acids contents across the two sampled populations. This study showed that the proximate composition, elemental contents and amino acids profiles of both the cultured and wild fishes varies significantly and the results proofed that the cultured fish sample were more nutritious than the wild population, therefore, good monitoring system of Oba Reservoir should be encouraged with strict vigilance.


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