Mariculture Impacts on the Benthonic Icthyofauna of Itaguá Bay, Ubatuba, Southeast Brazil

Kuhnen, Vanessa Villanova; Costa, Leticia de Góis; Raiol, Kleper de Lima; Sousa, Otávio Mesquita de; Sanches, Eduardo Gomes

doi:10.20950/1678-2305.2019.45.4.500

Cited by 10 publications

(5 citation statements)

References 33 publications

(40 reference statements)

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“…The search for sustainability of the exploitation of aquatic resources is an issue that has been considered in recent studies (Bergamo et al ., 2021; Kuhnen et al ., 2019). Innovative technologies have been developed to contribute to sustainability advances in finfish farming.…”

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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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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“…The sustainability of the exploitation of aquatic resources is an issue that has been considered in recent studies (Bergamo et al, 2021; Kuhnen et al, 2019). For public aquariums, a further step towards sustainability relies on the captive breeding of animal collections, especially for threatened or overly harvested species (Che‐Castaldo et al, 2021; Powell, 2019).…”

Section: Discussionmentioning

confidence: 99%

Food‐related substrate preference in juveniles seastar Echinaster (Othilia) brasiliensis (Müller & Troschel,1842) in captivity

Maganhe¹,

Andrade²,

Camilo³

et al. 2023

Zoo Biology

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There are only a few studies that describe the larval development of Echinaster or aspects on culture systems for the genus. For starfishes, the choice of suitable substrates has received special attention since it could influence the acid–base balance of the water, movement capacity and predation rate. The objective of this study was to evaluate the ideal food‐related substrate for the rearing of juvenile Echinaster brasiliensis. A batch of fertilized eggs released in spontaneous spawning was collected and kept in a plankton‐kreisel until metamorphosis. Data on preference of food‐related substrate was recorded for 10 weeks from day 58 post‐release. From release to 132 days old, arm length increased from 0.81 mm to 1.31 ± 0.03 mm. Considering the sudden increase in arm length (AL), it was estimated that feeding started around 40 days of age. Regarding food‐related substrate preferences, biofilm grown on “rocks” showed a significant difference among other treatments, adding up to 50% of preference (p < .05). For sponge and biofilm from bio media, there was no statistical difference for the whole period. In this study, sponges showed to be the least preferred food‐related substrate for post‐settlement juveniles. Considering that Echinaster and other starfish are commonly maintained on a diet of collected or cultured sponges, difficulties in sourcing a ready supply throughout the year represent limitations to their sole use within commercial or laboratory‐scale production. In this sense, the use of biofilm from biological media for the feeding of juvenile starfish is not yet reported in the literature and showed to be an easy and promising option.

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“…The sustainability of the exploitation of aquatic resources is an issue that has been considered in recent studies (Bergamo et al ., 2021; Kuhnen et al ., 2019). Brazilian technologies have been developed to contribute for sustainability advances in captive marine fish.…”

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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Mariculture Impacts on the Benthonic Icthyofauna of Itaguá Bay, Ubatuba, Southeast Brazil

Cited by 10 publications

References 33 publications

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

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

Food‐related substrate preference in juveniles seastar Echinaster (Othilia) brasiliensis (Müller & Troschel,1842) in captivity

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

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