Effects of dietary Gracilaria sp. and Alaria sp. supplementation on growth performance, metabolic rates and health in meagre (Argyrosomus regius) subjected to pathogen infection

Peixoto, Maria João; Salas-Leiton, Emilio; Silva-Brito, Francisca; Pereira, Luís F.; Svendsen, Jon Christian; Baptista, Teresa; Pereira, Rui; Abreu, Helena; Reis, Pedro A.; Gonçalves, José F.; Ozório, Rodrigo O. A.

doi:10.1007/s10811-016-0917-1

Cited by 32 publications

(11 citation statements)

References 84 publications

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“…Results on routine metabolic rates (RMR) during acclimation period (0.5 BL/s) did not show differences among the four experimental diets, ranging between 220 and 240 mgO 2 /kg/hr. These values are in accordance with the results reported in other teleosts, including the meagre (Peixoto et al., ), although these types of measures are highly influenced not only by water temperature and body size (Clarke & Johnston, ; Fry, ; Hulbert & Else, ; Lee et al., ), but also by the patterns of activity of each species. Thus, common carp exhibits RMR values around 600 mgO 2 /kg/hr at 25.5°C (Pietsch & Junge, ), whereas the less active sole expends around 130 mg O 2 /kg/hr at 24°C (Lefrancois & Claireaux, ).…”

Section: Discussionsupporting

confidence: 91%

Dietary sodium heptanoate helps to improve feed efficiency, growth hormone status and swimming performance in gilthead sea bream (Sparus aurata)

et al. 2018

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The potential benefits of a commercial preparation of heptanoate (NOREL, HEPTON®) were evaluated in an 11‐week gilthead sea bream feeding trial (May–August), using a factorial design with four isoproteic and isoenergetic diets. Fish meal (FM) was added at 200 g/kg in D1–D2 diets and at 50 g/kg in D3–D4 diets, which also contained fish peptones and plant proteins as source of proteins. Heptanoate was added at 3 g/kg in D2 and D4 diets. All fish grew from 13–14 g to 81–84 g with an overall feed efficiency (FE) of 0.91–0.94. An early impairment of FE (weeks 1–4) was found with the standard FM‐based diet (D1), but this detrimental condition was reversed by heptanoate, increasing FE from 0.88 in D1 fish to 0.99 in D2 fish. Further improvements were progressively diluted over time, remaining D2 and D3–D4 fed fish almost undistinguishable through all the trial. Heptanoate supplementation produced higher hepatic glycogen depots, but no signs of histopathological damage were found in liver or intestine. Other lasting heptanoate effects included changes in plasma antioxidant capacity, plasma cortisol and growth hormone levels, and measures of respirometry in swimming performance tests. Altogether, it supports the potential use of heptanoate to speed up adaptive and healthy metabolic states of farmed fish to cope with challenging culture conditions.

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Section: Discussionsupporting

confidence: 91%

Dietary sodium heptanoate helps to improve feed efficiency, growth hormone status and swimming performance in gilthead sea bream (Sparus aurata)

et al. 2018

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“…In our experimental conditions, MO 2 increased in sea bream and sea bass from 230–270 to 370–400 mgO 2 /kg/h with the increase of swimming speed from 1 to 4 BL/s (Figure 4A,B). These reported values are in line with those found in previous studies in sea bream (Martos-Sitcha et al, 2018), European sea bass (Claireaux et al, 2006) or other farmed fish, such as meager ( Argyrosomus regius ) (Peixoto et al, 2017), challenged at water temperatures close to those set in our experimental approach. Thus, given the close parallelism between measurements of MO 2 and respiratory frequency, we can conclude that the AE-FishBIT provided reliable results of O 2 consumption in a wide-physiological range not only when the energy requirements did not exceed the O 2 demand for a sustainable aerobic metabolism, but also during the anaerobic phase that was largely increased at submaximal exercise (Ejbye-Ernst et al, 2016).…”

Section: Discussionsupporting

confidence: 93%

Ultra-Low Power Sensor Devices for Monitoring Physical Activity and Respiratory Frequency in Farmed Fish

et al. 2019

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Integration of technological solutions aims to improve accuracy, precision and repeatability in farming operations, and biosensor devices are increasingly used for understanding basic biology during livestock production. The aim of this study was to design and validate a miniaturized tri-axial accelerometer for non-invasive monitoring of farmed fish with re-programmable schedule protocols. The current device (AE-FishBIT v.1s) is a small (14 mm × 7 mm × 7 mm), stand-alone system with a total mass of 600 mg, which allows monitoring animals from 30 to 35 g onwards. The device was attached to the operculum of gilthead sea bream ( Sparus aurata ) and European sea bass ( Dicentrarchus labrax ) juveniles for monitoring their physical activity by measurements of movement accelerations in x - and y -axes, while records of operculum beats ( z -axis) served as a measurement of respiratory frequency. Data post-processing of exercised fish in swimming test chambers revealed an exponential increase of fish accelerations with the increase of fish speed from 1 body-length to 4 body-lengths per second, while a close relationship between oxygen consumption (MO 2 ) and opercular frequency was consistently found. Preliminary tests in free-swimming fish kept in rearing tanks also showed that device data recording was able to detect changes in daily fish activity. The usefulness of low computational load for data pre-processing with on-board algorithms was verified from low to submaximal exercise, increasing this procedure the autonomy of the system up to 6 h of data recording with different programmable schedules. Visual observations regarding tissue damage, feeding behavior and circulating levels of stress markers (cortisol, glucose, and lactate) did not reveal at short term a negative impact of device tagging. Reduced plasma levels of triglycerides revealed a transient inhibition of feed intake in small fish (sea bream 50–90 g, sea bass 100–200 g), but this disturbance was not detected in larger fish. All this considered together is the proof of concept that miniaturized devices are suitable for non-invasive and reliable metabolic phenotyping of farmed fish to improve their overall performance and welfare. Further work is underway for improving the attachment procedure and the full device packaging.

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“…Haematocrit levels may vary widely among species (Gallaugher & Farrell, ), but the present haematocrit levels (32%–35%) are only slightly higher than baseline levels of largemouth bass Micropterus salmoides (Lacepède) (Brownscombe et al., ) and comparable to juvenile coho salmon Oncorhynchus kisutch (Walbaum) (Morrison et al., ), two‐lined monocle bream Scolopsis bilineatus (Bloch) without parasites (Triki, Grutter, Bshary & Ros, ) and delta smelt Hypomesus transpacificus McAllister in fresh waters (Kammerer, Hung, Baxter & Teh, ). Pathogen infections often cause decreased haematocrit levels (Peixoto et al., ) and a temporary decrease following tagging may be related to an initial immune response or blood loss, with haematocrit levels returning to baseline levels as the healing progresses. The lack of tagging‐induced changes in haematocrit levels, and also advanced wound healing within 10 days after tagging, suggests that round gobies are not affected negatively by telemetry tags implanted into the body cavity.…”

mentioning

confidence: 99%

Effects of acoustic telemetry transmitters on gill ventilation rate and haematocrit levels of round goby Neogobius melanostomus

Behrens

Svendsen

Deurs

et al. 2017

Fisheries Management Eco

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Effects of dietary Gracilaria sp. and Alaria sp. supplementation on growth performance, metabolic rates and health in meagre (Argyrosomus regius) subjected to pathogen infection

Cited by 32 publications

References 84 publications

Dietary sodium heptanoate helps to improve feed efficiency, growth hormone status and swimming performance in gilthead sea bream (Sparus aurata)

Dietary sodium heptanoate helps to improve feed efficiency, growth hormone status and swimming performance in gilthead sea bream (Sparus aurata)

Ultra-Low Power Sensor Devices for Monitoring Physical Activity and Respiratory Frequency in Farmed Fish

Effects of acoustic telemetry transmitters on gill ventilation rate and haematocrit levels of round goby Neogobius melanostomus

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