Aspectos da reprodução e primeiro registro de distocia em raia-ticonha (Rhinoptera bonasus)

Cavalcante, Daniela Gurgel; Gallo, H.; Sousa, Otávio Mesquita de; Azevedo, Venâncio Guedes de; Sanches, Eduardo Gomes

doi:10.20950/1678-2305.2016v42n3p710

Cited by 5 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…In one of the reported cases, the female was 16-year-old and the gestation lasted 14 months, two months longer than expected for the species. Human intervention was necessary, and obstetric maneuvers were performed, but the neonate was already dead and presented rigor-mortis (Cavalcante et al 2016). The authors argue that the probable causes were the advanced age of the female, the position of the neonate inside the uterus, as well as its superior size in relation to the ones previously generated by her.…”

Section: Discussionmentioning

confidence: 99%

“…When fetal, dystocia may be SHORT COMMUNICATION caused by the abnormal size, or inadequate position (Noakes et al 2001;Stedman & Garner 2018). Likewise, dystocia is commonly associated with high neonate mortality rates and, in extreme cases, can lead to maternal mortality (Mahon et al 2001;Jung-Schroers et al 2015;Cavalcante et al 2016). In elasmobranchs, reports are so far, restricted to captive animals, possibly because of the facility of monitoring pregnant females kept under human care (Henningsen et al 2004;George et al 2017).…”

Section: Introductionmentioning

confidence: 99%

EVIDENCE OF DYSTOCIA IN A FREE-RANGING COWNOSE RAY Rhinoptera bonasus (ELASMOBRANCHII, RHINOPTERIDAE)

Leite

Wosnick²,

Giareta³

et al. 2020

Bol. Lab. Hidrobiol.

View full text Add to dashboard Cite

Capture and handling can have sublethal consequences on elasmobranchs, even when individuals are quickly released to comply with legislation or fishermen's ethics on voluntary conservation. Dystocia is characterized by the physical inability to deliver the neonate, even when it is ready for birth. So far, this phenomenon has been reported only in Cownose rays kept under human care. The present study aimed to report the occurrence of dystocia in a free-living Cownose ray (Rhinoptera bonasus), possibly caused by capture stress. Allied to other sublethal effects, dystocia can compromise population recruitment and increase post-capture mortality, especially for older females. Still, considering that this phenomenon was observed and described only in captivity, reports of occurrence in the wild are essential to increase knowledge on the topic and adapt protocols used in captivity for free-ranging animals, as a way to reduce the negative impacts of dystocia.

show abstract

“…Dystocia has been observed on multiple occasions for Cownose Rays in aquaria (Cavalcante et al, 2016;George et al, 2017), and it has also been suggested as a cause of mortality associated with capture for in situ rays (Leite et al, 2020). Procedures for cesarean delivery and monitoring have been developed for Cownose Rays, and, if adopted, should minimize neonate and female loss for animals in aquaria.…”

Section: Reproductive Pathologiesmentioning

confidence: 99%

The role of aquaria in the advancement of elasmobranch reproductive biology

2022

View full text Add to dashboard Cite

Public aquaria showcase aquatic life while raising awareness and educating the public on biodiversity and the need for conservation. Recently, aquaria have followed in the footsteps of zoos by taking more directed approaches in species conservation as well as leveraging animals in their collection to fill biological knowledge gaps through research. Similar to zoos, aquaria are able to house animals that are not feasible to care for in traditional academic settings, allowing important life history information to be gained. In particular, our understanding of reproductive aspects of large migratory fishes such as elasmobranchs (sharks, skates and rays) have benefited from information gleaned in aquarium settings that would otherwise be difficult or impossible to study in the natural environment. For example, the ability of elasmobranchs to reproduce parthenogenetically was discovered through observation of sharks maintained in public aquaria. Since its discovery, parthenogenesis has been observed for many ex situ shark and ray species. Aquaria have made other important contributions to characterizing elasmobranch reproductive biology such as understanding reproductive cycling and trialing assisted reproductive techniques, among others. Here, we review the role aquaria have played in the field of elasmobranch reproductive biology and discuss how zoos and aquariums can continue to contribute to this field in the future.

show abstract

Aspectos da reprodução e primeiro registro de distocia em raia-ticonha (Rhinoptera bonasus)

Cited by 5 publications

References 0 publications

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

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

EVIDENCE OF DYSTOCIA IN A FREE-RANGING COWNOSE RAY Rhinoptera bonasus (ELASMOBRANCHII, RHINOPTERIDAE)

The role of aquaria in the advancement of elasmobranch reproductive biology

Contact Info

Product

Resources

About