Welcome   Sponsored By
Subscribe | Register | Advertise | Newsletter | About us | Contact us
   


Olive flounder farm in Wando County

Dietary effect of low-fishmeal diets on gut microbiota in olive flounder

Click on the flag for more information about South Korea SOUTH KOREA
Tuesday, April 07, 2020, 05:10 (GMT + 9)

Fish life stage more important modulating intestinal microbiota than diet

The olive flounder (Paralichthys olivaceus) is the most economically important carnivorous marine fish cultured in the Republic of Korea, and accounts for more than 45 percent of all farmed fish production.

Fishmeal remains the gold‐standard protein ingredient for carnivorous aquaculture fish. In olive flounder, a high proportion of fishmeal is generally used to support the growth and health in the juvenile stage, and then it is progressively reduced during the grow‐out stage (~30 to 40 weeks). To reduce the reliance on fishmeal and support the sustainable future development of Korean aquaculture, researchers and producers have worked on cost‐effective alternatives to fishmeal.

View of olive flounder during grow-out at a farm in Korea. Photo by Darryl Jory/aquaculturealliance.org

Many plant proteins have been explored as fishmeal alternatives in aquafeeds, but the presence of some antinutritional factors or nutritional imbalances may negatively affect fish growth, gut microbiota composition, immune response and survival rates.

Gut microbiota are critical to the host’s nutrition, development, immunity, and resistance against stressful conditions. The advent of next‐generation sequencing, NGS [several modern sequencing technologies that allow for sequencing of DNA and RNA much more quickly and cheaply than previously used technologies, and which have transformed the study of molecular biology] enabled more sophisticated analysis of complex gut microbiota by a culture‐independent approach with unprecedented resolution and throughput.

NGS has been used to explore the dietary effects on gut microbiota of different fish species. Most of these studies investigated the dietary effects on fish gut microbiota for a short‐term, but the long‐term dietary effects at different growth stages have generally been overlooked. The dietary effect of plant protein ingredients on gut microbiota of the olive flounder has not been investigated.

The olive flounder (Paralichthys olivaceus) is the most economically important carnivorous marine fish cultured in the Republic of Korea (Photo: aquaculturealliance.org)

This article – adapted and summarized from the original publication [Niu, K-M. et al. 2020. Dietary effect of low fishmeal aquafeed on gut microbiota in olive flounder (Paralichthys olivaceus) at different growth stages. Microbiology Open 9(3), March 2020.] – reported on an investigation of the gut microbiota of olive flounder at different growth stages with long‐term dietary administration of plant‐based low fishmeal and practical fishmeal diets by a culture‐independent metagenomic [permitting comparisons of genetic material from multiple samples] approach.

Study setup

We formulated and tested two isonitrogenous and isolipidic diets as a fishmeal (FM)-based control diet (Con) and a plant protein-based low-FM diet (FM30) with 30 percent fishmeal replacement using soybean meal, corn gluten meal and corn concentrate. The two diets were produced by thoroughly mixing the feed ingredients, followed by extrusion. The pellets were then air-dried at 60 degrees-C for three hours and stored at minus-20 degrees-C until use.

The feeding trial was conducted at Aquafeed Research Center (Pohang), National Institute of Fisheries Science (NIFS), Republic of Korea. Juvenile olive flounder (average initial body weight, 30 grams) were obtained from the Korea NIFS and acclimated to environmental conditions for eight weeks while fed with the Con diet prior to the experiment.

The fish were reared in an indoor flow-through system with standard conditions, and the water temperature ranged from 16.8 to 26.1 degrees-C. After acclimation, 300 fish in each treatment fed with the Con or FM30 diet were randomly distributed into three polyvinyl circular tanks (100 fish/tank; volume, 400 liters) supplied with seawater at a flow rate of 20 liters per minute and aeration.

The feeding trial was conducted for eight months, and all the fish were fed twice a day ad libitum. Three fish, under 100 grams, were collected before the initiation of the experiment and designated the juvenile stage (<100 grams). Fish sampled during the study were designated as the grower (~400 grams), subadult (~800 grams) and adult (>1,000 grams) growth stages based on their body weight and length (Fig. 1).

Fig. 1: Growth stage and diet‐based gut bacterial community in olive flounder: (a) Schematic representation for the overall study; Con, a fishmeal-based control diet; FM30, a low fishmeal diet containing a blend of plant proteins replacing 30 percent of fishmeal (FM30); (b) average body weight (BW) and length (BL) of the used fish samples.

For detailed information on experimental design and diets, fish and study conditions; sample collection, DNA extraction and sequencing; sequencing data analysis; and statistical analyses, refer to the original publication.


Author: Dr. Soo Ki Kim (This article has 10 co-authors but only the affiliation information for one of the corresponding authors) | Global Aquaculture Advocate | Read the complete article here

This study was supported by a grant from the National Institute of Fisheries Science (R2019012), Republic of Korea

editorial@seafood.media
www.seafood.media


 Print


Click to know how to advertise in FIS
MORE NEWS
Canada
Mar 29, 07:10 (GMT + 9):
Cooke Aquaculture Named One of Atlantic Canada’s Top Employers
United States
Mar 28, 07:20 (GMT + 9):
AQUA Cultured Foods Partners with Ginkgo Bioworks to Optimize Alt-Seafood Production
Japan
Mar 28, 07:00 (GMT + 9):
The first fly meal-based food in Japan developed by Nichimo
Norway
Mar 28, 06:50 (GMT + 9):
Fish Pool Salmon Price Status Report for week 13
Norway
Mar 28, 06:40 (GMT + 9):
Statistics │ Export by destination │ Atlantic salmon: semi-dress/fillet fresh │ by country │ 2022-23-24
Japan
Mar 28, 01:00 (GMT + 9):
Maruha Nichiro: 'Salmon is the most consumed dish in conveyor belt sushi restaurants for 13 consecutive years'
Norway
Mar 27, 07:00 (GMT + 9):
Torghatten Aqua buys INAQ
United Kingdom
Mar 27, 07:00 (GMT + 9):
Where are we in the search for new protein sources used in aquafeeds? IFFO comments on a new major review
Denmark
Mar 27, 07:00 (GMT + 9):
Billund Aquaculture : Shrimply the Best
Chile
Mar 27, 01:00 (GMT + 9):
Akva Group Reduces Emissions in Chilean Aquaculture
Faroe Islands
Mar 26, 07:00 (GMT + 9):
Hiddenfjord achieves four-star BAP accreditation
Brazil
Mar 26, 03:00 (GMT + 9):
Brazilian tilapia market
France
Mar 25, 04:50 (GMT + 9):
DNV has teamed up with Ocean Sovereign to obtain French registration for the deployment of innovative fish farming 'superyacht' Ocean Ark
Norway
Mar 25, 02:00 (GMT + 9):
Statistics │ Export │Atlantic salmon: fresh and frozen │ week 10
Japan
Mar 25, 02:00 (GMT + 9):
Statistics │ Import │Frozen Salmon │ Chile, Norway, Turkey, USA, and Russia │ 2022-23-24



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Clipfish challenges in Brazil: Port bureaucracy stops millions worth
Brazil More and more clipfish containers are being stopped in Brazilian ports. - Complicated regulations make market access challenging, to say the least, say Norwegian exporters who risk large losses. Bra...
Catches in the Sea of Okhotsk and Bering Sea
Russia Fed. Situational update as of 03/24/2024 Source: Stockfile FIS Sea of Okhotsk (pollock) According to OSM data in the Sea of Okhotsk, pollock catch (industrial and coastal fisheries) as of March 24, 20...
Productive Development of the Fishing Activity
Peru Fishing Sector Bulletin - January 2024 The landing of hydrobiological resources registered a negative interannual variation of 62.7%, as a result of the lower landing of fishing resources for indirec...
NGO Sues UK Government Over International Fishing Quotas
United Kingdom Blue Marine Foundation, a charity dedicated to restoring the ocean to health, has launched legal proceedings over the government’s decision to set fishing opportunities, for more than half UK st...
 

Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation - Headquarters
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
AquaChile S.A. - Group Headquarters
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods, Inc
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO - Food and Agriculture Organization - Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Brim ehf (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Grupo Pereira Headquarters
Costa Meeresspezialitäten GmbH & Co. KG
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly Marine Harvest ASA) - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart | Wal-Mart Stores, Inc. (Supermarket) - Headquarters
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2024 Seafood Media Group Ltd.| All Rights Reserved.   DISCLAIMER