Can compensatory growth be used as feed management for dusky grouper?

Spandri, Victor Costa; Takatsuka, Verônica; Sousa, Otávio Mesquita de; Kuhnen, Vanessa Villanova; Sanches, Eduardo Gomes

doi:10.1111/are.15088

Cited by 8 publications

(6 citation statements)

References 22 publications

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“…For instance, similar growth rates were found in Powan Coregonus lavaretus and Matrinxã Brycon amazonicus (Känkänen and Pirhonen 2009;Urbinati et al 2014) that were fed on five or seven consecutive days, but the growth of fingerling Dusky Grouper Epinephelus marginatus and Pirapitinga Piaractus brachypomus was significantly reduced by 2-d starvation periods (Favero et al 2021;Spandri et al 2021). Differences in the length of the experiments, the size of the experimental cohorts, and daily feeding frequency may have contributed to the observed differences.…”

Section: Variablementioning

confidence: 61%

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Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

2022

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As feed is a major cost in finfish aquaculture, considerable economic advantages can be gained by optimizing feeding efficiency. In the present study, the effects of reducing feeding frequency were evaluated in Gulf of Mexico strain Striped Bass Morone saxatilis raised in recirculating systems. Juvenile Striped Bass (~170 g) were raised for 84 d at 21°C and fed three or five times weekly at 3% of body weight (% BW) or three, five, and seven times weekly at 2% BW. In another experiment, subadult fish (~720 g) were raised at 15°C for 84 d and were fed three or five times weekly at 2% BW. In all experiments, feeding frequency did not affect growth rates or efficiency and fish that were fed less frequently consumed more feed per feeding but typically had reduced feed consumption over the length of the experiment. These results indicate that labor and feed costs may be reduced by limiting the feeding frequency of Striped Bass in recirculating systems.

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Section: Variablementioning

confidence: 61%

“…2021; Spandri et al. 2021). Differences in the length of the experiments, the size of the experimental cohorts, and daily feeding frequency may have contributed to the observed differences.…”

Section: Discussionmentioning

confidence: 99%

Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

2022

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“…Innovative technologies have been developed to contribute to sustainability advances in finfish farming. Examples of such technologies are the use of new materials to reduce environmental impacts (Santos et al ., 2020) and innovative food management practices to reduce feed waste (Sousa et al ., 2019; Spandri et al ., 2020). The smartphone application as an alternative to the colorimeter is intended for regions with limited resources, where there is no possibility of purchasing high‐value laboratory equipment (Yetisen et al ., 2014).…”

Section: Discussionmentioning

confidence: 99%

Can canthaxanthin intensify the colour of the blood swordtail Xiphophorus helleri?

Olier¹,

Sousa²,

Sanches³

2023

Journal of Fish Biology

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Colouring has a great influence on the commercialization of ornamental fish. The aim of this study was to evaluate different concentrations of canthaxanthin in the diet of the blood swordtail Xiphophorus helleri in an effort to obtain a more intense red colour. Six concentrations of canthaxanthin (0, 50, 100, 250, 400 and 600 mg kg À1 diet) were used. The experiment lasted 60 days. Fish were evaluated for increased red pigmentation through the use of photographs (performed by smartphone) and imaging applications considering the Hunter method and the CMYK and productive performance. No significant differences were observed for productive performance. The use of photographs by means of a smartphone and the use of imaging applications proved to be adequate to assess differences in colour in the species. Swordtail red pigmentation did not show significant increase regardless of canthaxanthin dosages.Varieties of ornamental fish bred for red coloration may have limits for increased colour due to the storage capacity of carotenoids by chromatophores.

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“…Brazilian technologies have been developed to contribute for sustainability advances in captive marine fish. Examples of such technologies are the use of new materials in net tanks to reduce environmental impacts (Santos et al ., 2020) and innovative food management practices to reduce feed waste in recirculation aquatic systems (Sousa et al ., 2019; Spandri et al ., 2020). Reproduction of elasmobranchs in captive is still little known and studied.…”

Section: Discussionmentioning

confidence: 99%

Birth and growth of the shortnose guitarfish Zapteryx brevirostris (Müller & Henle, 1841) (Chondrichthyes, Rhinobatidae) in captivity

Maganhe

Camilo

Kurokawa³

et al. 2022

Journal of Fish Biology

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Endemic to the south‐west Atlantic Ocean, the shortnose guitarfish (Zapteryx brevirostris) is a small species, classified as endangered by the IUCN. Although reproduction in captivity has been successful for some species, a range of factors can limit the success of captive breeding programmes for elasmobranchs. In Brazil, the Ubatuba Aquarium was the first public aquarium to reproduce small‐sized elasmobranchs. Since 2018, at least five parturition events have been recorded for Z. brevirostris at the institution. From a total of 13 live neonates that rearing was attempted, the mean ± standard error of weight, total length (TL) and disc width at birth were 17.47 ± 1.6 g, 13.25 ± 0.7 cm and 6.53 ± 0.2 cm, respectively. The mean weight as well as mean TL were higher for females at all births, with 26.15 g and 15.07 cm for females in comparison with 17.09 g and 13.94 cm for males. Considering the increasing risk of extinction that the species is facing, age and growth studies are fundamental for the success of conservation, improving the knowledge of Z. brevirostris life cycle so that a more efficient and sustainable management can be carried out. This study provides important data, as well as directions for captive breeding of the species.

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Can compensatory growth be used as feed management for dusky grouper?

Cited by 8 publications

References 22 publications

Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

Can canthaxanthin intensify the colour of the blood swordtail Xiphophorus helleri?

Birth and growth of the shortnose guitarfish Zapteryx brevirostris (Müller & Henle, 1841) (Chondrichthyes, Rhinobatidae) in captivity

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Can compensatory growth be used as feed management for dusky grouper?

Cited by 8 publications

References 22 publications

Effects of Feeding Strategies on Growth Performance of F1 Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

Effects of Feeding Strategies on Growth Performance of F1 Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

Can canthaxanthin intensify the colour of the blood swordtail Xiphophorus helleri?

Birth and growth of the shortnose guitarfish Zapteryx brevirostris (Müller & Henle, 1841) (Chondrichthyes, Rhinobatidae) in captivity

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Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems

Effects of Feeding Strategies on Growth Performance of F₁ Gulf Coast Striped Bass Strains in Recirculating Aquaculture Systems