Water temperature effects on growth performance, proximate body and tissue composition, morphometric characteristics and gastrointestinal evacuation processes of juvenile meagre, Argyrosomus regius (Asso 1801)

Kounna, Christiana; Fountoulaki, Eleni; Miliou, Helen; Chatzifotis, Stavros

doi:10.1016/j.aquaculture.2021.736683

Cited by 9 publications

(4 citation statements)

References 64 publications

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“…In fish, as poikilothermic animals, water temperature has a significant influence on voluntary feed intake and fish growth. Both variables increase with the increase in temperature up to an optimum, and decrease with higher temperatures (Björnsson et al, 2007;Kounna et al, 2021). In our study, and concordantly with a previous of this species (Fernańdez-Montero et al, 2018), fish ingested almost 2-fold more feed and grew 63% more at 26 °C than at 18°C after two weeks.…”

Section: Discussionsupporting

confidence: 91%

Feeding and water temperature modulate the potential activity of gut microbiota in greater amberjack juveniles (Seriola dumerili)

Navarro-Guillén,

Degré Lorentsen,

Perera

et al. 2023

Front. Mar. Sci.

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Gut microbial communities are highly dynamic and respond to factors such as diet and host metabolism. However, there is limited knowledge on changes in gut microbiota during the daily cycle. To investigate how interactions between feeding and water temperature affected the diurnal dynamics and activity of the microbiota, we analyzed the qualitative and quantitative composition in feces of the potentially active bacterial community along a day cycle in greater amberjack juveniles (Seriola dumerili). Bacterial density (based on qPCR of 16S rDNA) in feces was relatively stable along the day. In contrast bacterial activity (based on qPCR of 16S rRNA) increased during the period of active feeding, and was reduced to pre-feeding levels four hours after the last meal. The relative potential activity of the bacterial community in fish feces varied with postprandial time. At the phylum level there was a shift from a Spirochaetes-dominated community in the morning to increased potential activity of Proteobacteria after feeding. At lower taxonomic level, i.e. order, the bacterial community was dominated by Mycoplasmoidales, which relative potential activity was maintained throughout the day in all treatments. By contrast, for absolute potential bacterial activity at the order level there was a peak in potential activity of several bacterial orders at 6h after first feeding, with the most noticeable increase observed for Mycoplasmoidales. Results from the present work also indicated a close relation between the effect of water temperature and microbial dynamics. This is the first study assessing the quantitative and qualitative effects of water temperature and daily feeding rhythm on the gut microbiota dynamics in fish. Feeding was the main driver modulating bacterial activity, promoting a peak in bacterial activity 6h after first feeding. However, water temperature also modulated gut microbiota dynamics, with a marked effect on the time scale. In addition, results indicate that analysis of absolute bacterial potential activity provides a better resolution of metabolically active gut microbial community, since a change in the absolute activity of a single taxon can alter the relative activity of all taxa.

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Section: Discussionsupporting

confidence: 91%

Feeding and water temperature modulate the potential activity of gut microbiota in greater amberjack juveniles (Seriola dumerili)

Navarro-Guillén,

Degré Lorentsen,

Perera

et al. 2023

Front. Mar. Sci.

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“…Ammonia (NH 3 ) concentration (Hach Lange DR 2800, Hach Lange Loveland, Colorado, USA) was determined every five days. The optimum rearing water temperature range for a meagre of 36–123 g is 23–27°C (Kounna et al, 2021). Water temperature was maintained at 23.1 ± 0.07°C, dissolved oxygen levels at 7.9 ± 0.05 mg/L, pH at 7.75 ± 0.12, salinity at 21.0 ± 0.1‰ and ammonia levels below 0.5 mg/L, during the trial.…”

Section: Methodsmentioning

confidence: 99%

The effects of feeding frequency on the growth performance, body composition, health status and histology of juvenile meagre ( Argyrosomus regius )

Karadal

Mantoğlu

Güroy

et al. 2022

Aquaculture Research

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Maximum growth and minimum feed intake are essential to achieve high-class end-product in aquaculture. Fish feed formulation and feeding management are regularly optimized to improve the endproduct quality. Thus, aquafeed quality and feeding operations extensively affect the aquaculture sector's sustainability as feed is the most critical cost item in fish culture (Wang et al., 2009). Fish growth can be affected by food type, food availability, digestibility and nutritional composition of the diet, feeding strategies (i.e., feeding ratio and frequency), and feed intake during the culture period

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“…In this study, data from October 2018 and April 2019 field surveys showed, as expected, that ammonia and nitrite concentrations are well below the toxic limit for any selected fish species that can be farmed in these marine areas. Similarly, dissolved oxygen, salinity, and pH levels are within the optimal range for developing marine fish farming [30,[119][120][121][122][123]. In general, the data from the field surveys highlight the good quality of the water and its potential for the implementation of new productions.…”

Section: Fishmentioning

confidence: 99%

Potential for Coastal and Offshore Aquaculture in Portugal: Insights from Physico-Chemical and Oceanographic Conditions

et al. 2022

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Physico-chemical and biological parameters along the Portuguese coast were analyzed to evaluate the potential to produce aquatic species of economic interest. Water samples were collected in 2018 and 2019 in five different areas of the Portuguese coast. Currents data were collected between 2018 and 2020 and historical waves height data from 1988 to 2019. According to the results, there is a wide variety of species that can be considered for production. The northernmost area presented the lowest temperature, as well as the highest levels of chlorophyll a, and nitrate. Under such conditions, the rearing of salmon Salmo salar, mussel Mytilus edulis, scallop Pecten maximus, macroalgae Porphyra umbilicalis, and Undaria pinnatifida can be considered. Regarding the southernmost area, due to the highest temperature, this area seems appropriate for the production of meager Argyrosomus regius, sea bream Sparus aurata, sea bass Dicentrarchus labrax, and greater amberjack Seriola dumerili. This study highlights the challenges in deploying aquaculture structures on the Atlantic coast due to its oceanographic conditions. Site selection for aquaculture is a complex process and pilot studies are essential to analyze the feasibility of developing offshore aquaculture along the coast of Portugal.

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Water temperature effects on growth performance, proximate body and tissue composition, morphometric characteristics and gastrointestinal evacuation processes of juvenile meagre, Argyrosomus regius (Asso 1801)

Cited by 9 publications

References 64 publications

Feeding and water temperature modulate the potential activity of gut microbiota in greater amberjack juveniles (Seriola dumerili)

Feeding and water temperature modulate the potential activity of gut microbiota in greater amberjack juveniles (Seriola dumerili)

The effects of feeding frequency on the growth performance, body composition, health status and histology of juvenile meagre ( Argyrosomus regius )

Potential for Coastal and Offshore Aquaculture in Portugal: Insights from Physico-Chemical and Oceanographic Conditions

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