Reprodution of the Cownose ray, Rhinoptera bonasus Mitchill, 1815 (Elasmobranchii, Rhinopteridae), in captivity and newborn care

Baldassin, Paula; Gallo, H.; Vg, Azevedo

doi:10.1590/s1519-69842008000400029

Cited by 5 publications

(5 citation statements)

References 3 publications

(2 reference statements)

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“…In lieu of fisheries data, direct observation of elasmobranchs in aquaria or in the wild can provide valuable information about important reproductive traits of particular species (Luer & Gilbert, 1985; Baldassin et al , 2008; Bansemer & Bennett, 2009). With respect to Manta , courtship and mating events have been documented on a few occasions in the wild and in captivity (Yano et al , 1999; Anon., 2007).…”

Section: Introductionmentioning

confidence: 99%

Reproductive ecology of the reef manta ray Manta alfredi in southern Mozambique

Marshall

Bennett

2010

Journal of Fish Biology

122

211

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The application of a photographic identification methodology using the unique ventral surface markings (natural spot patterns) of an observed population in southern Mozambique enabled many aspects of the reproductive ecology of reef manta rays Manta alfredi to be examined. The region encompassing the study site was identified as a mating ground for M. alfredi based on observations of mating events and fresh mating scars on females. The distribution of these pectoral fin scars was highly biased and indicated a strong lateralized behavioural trait, with 99% of these scars occurring only on the left pectoral fin. No other elasmobranch has been reported to display behavioural lateralization. The study region also acts as a birthing ground, with individuals typically giving birth in the austral summer period after a gestation of c. 1 year. Reproductive periodicity in M. alfredi was most commonly biennial, but a few individuals were pregnant in consecutive years, confirming an annual ovulatory cycle. The production of a single pup appears to be the normal situation, although observations in the wild as well as during opportunistic dissections of individuals killed by fisheries revealed that two pups are conceived on occasion. Many aspects of the study have contributed to the limited baseline data currently available for this species and have highlighted the potential need for more conservative conservation strategies.

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Section: Introductionmentioning

confidence: 99%

Reproductive ecology of the reef manta ray Manta alfredi in southern Mozambique

Marshall

Bennett

2010

Journal of Fish Biology

122

211

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“…Although captive birth for females that were captured pregnant from the wild was reported by Gonzalez (2004), this is the first published report of captive birth with copulation occurring under human care. Births for the Z. brevirostris have been recorded in the Ubatuba Aquarium since 2002 (Baldassin et al ., 2008; Cavalcante et al ., 2016). From previous attempts of newborn care, the species seems to require a substrate that allows the animals to bury themselves, a natural behaviour that promotes greater welfare, once representing a camouflage behaviour against predators (Sousa Lima et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Although captive breeding is a common practice in zoos, in public aquariums there is still little engagement regarding the sustainability of animal population, with few institutions that have implemented breeding programmes for aquatic organisms (Buckley et al ., 2018; Daly & Jones, 2017; Henningsen et al ., 2017). In Brazil, the Ubatuba Aquarium was the first public aquarium to reproduce small‐sized elasmobranchs, such as Rhinoptera bonasus and Z. brevirostris (Baldassin et al ., 2008; Cavalcante et al ., 2016). From a conservation point of view, research and education are needed for the responsible management of elasmobranchs given the increasing declines in wild populations due to anthropogenic pressures (Daly & Jones, 2017; Kim et al ., 2020; Wyffels et al ., 2020).…”

Section: Introductionmentioning

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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“…The cownose ray, Rhinoptera bonasus (Mitchill, 1815) is a species of Batoidea belonging to the Rhinopteridae family, mainly found in the Atlantic Ocean and throughout a large part of the western Atlantic and Caribbean, from New England, the United States to southern Brazil. The cownose ray is a semi-pelagic species which found in tropical and temperate seas and estuaries (Neer & Thompson, 2005), and its population index is not known, but groups of thousands of individuals may be seen during migration (Baldassin et al, 2008). About 47 species * : https://orcid.org/0000-0002-2687-1221…”

Section: Introductionmentioning

confidence: 99%

İnek Burunlu Vatoz (Rhinoptera bonasus) Balığının Makroskobik Olarak İncelenmesi

Suzer

Yalgin

Satıcıoğlu

et al. 2022

Journal of Anatolian Environmental and Animal Sciences

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The cownose ray, Rhinoptera bonasus, is currently listed as vulnerable and threatened species by the IUCN Red List due to overfishing and bycatch in worldwide resulted declines of the steep population declines of 30-49% in only 43 years. We aimed to present suitable dissection methods for a necropsy of cownose ray with a large, rhomboid-shaped wing-like pectoral disc and compressed dorsoventrally using a specific approach to observe external and internal anatomy. The fish were obtained from a public aquarium after natural death and were dissected with four incision area to open chondrocranium, gills, pericardial cavity and pleuroperitoneal cavity. The dorsal surface of the body is completely naked and smooth, greenish-brown colored, in contrast the ventral surface of the body is white. The liver fills most of the pleuroperitoneal cavity and covers the esophagus, stomach, duodenum, valvular intestine, spleen, kidney and uterus. The valvular intestine or spiral valve is one of the largest organs of the digestive system. In most rays, only the left ovary is developed and functional; therefore, the ovaries of the specimens are located on the left to the median line, close to the cranial end of the pleuroperitoneal cavity, and caudal to the stomach. In conclusion, the presented dissection techniques will enable to examine of the external and internal anatomy of cownose rays and will contribute to a suitable approach to organs.

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Reprodution of the Cownose ray, Rhinoptera bonasus Mitchill, 1815 (Elasmobranchii, Rhinopteridae), in captivity and newborn care

Cited by 5 publications

References 3 publications

Reproductive ecology of the reef manta ray Manta alfredi in southern Mozambique

Reproductive ecology of the reef manta ray Manta alfredi in southern Mozambique

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

İnek Burunlu Vatoz (Rhinoptera bonasus) Balığının Makroskobik Olarak İncelenmesi

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