Ultrasound examination and behavior scoring of captive broadnose sevengill sharks, Notorynchus cepedianus (Peron, 1807)

Abstract 10.1002/zoo.20155.abs Serial ultrasound examination of four mature female sevengill sharks (Notorynchus cepedianus) was carried out over 18 months. Monitoring the reproductive cycle and development of follicles and fetuses in sharks in a noninvasive manner using this technique has not been reported previously. Sharks were caught out of the “Oceanarium” tank by divers using a […]

Evaluation of intramuscular ketoprofen and butorphanol as analgesics in chain dogfish (Scyliorhinus retifer)

Abstract 10.1002/zoo.20105.abs The mediation of nociception with analgesic medications has not been well documented in elasmobranchs. The purpose of this study was to determine effective analgesic doses of the opioid agonist-antagonist, butorphanol, and the non-steroidal anti-inflammatory drug, ketoprofen, in an elasmobranch. This was evaluated by repetitively assessing minimum anesthetic concentrations of the immersion anesthetic, tricaine […]

Notes on the long-term transport of the scalloped hammerhead shark (Sphyrna lewini)

Abstract 10.1002/zoo.10019.abs The capture and transport of scalloped hammerhead sharks (Sphyrna lewini Griffith and Smith, 1834) historically has represented a difficult, expensive, and uncertain undertaking for the public aquarium community. In this study, techniques were developed to improve the successful long-term transport of S. lewini by mitigating some of the deleterious effects associated with hyperactivity […]

Tooth loss rate from two captive sandtiger sharks (Carcharias taurus)

Abstract 10.1002/(SICI)1098-2361(1999)18:43.3.CO;2-4 For 6 months, two sandtiger sharks (Carcharias taurus) were held captive together in a small enclosure at the Lisbon Zoo. During that period, the gravel was monitored daily for teeth shed by the animals. At the end of their stay, the number of teeth divided by the number of days yielded a tooth […]

Captive husbandry and bioenergetics of the spiny butterfly ray, Gymnura altavela (Linnaeus)

Abstract 10.1002/(SICI)1098-2361(1996)15:23.3.CO;2-N Historically, gymnurid rays have not done well in a captive environment. This report describes success in maintaining two specimens of the spiny butterfly ray, Gymnura altavela, in captivity. An aggressive husbandry protocol of tube feeding and force feeding maintained energy levels until the rays began to feed on their own. The rays used […]

Male-female interactions affect foraging behaviour within groups of small-spotted catshark, Scyliorhinus canicula

To examine potential effects of male-female interactions on the sexes’ foraging behaviour, we studied equal-sized, single- and mixed-sex groups of a benthic elasmobranch, the small-spotted catshark, in response to electric stimuli. A total of 88 size-matched, adult individuals were repeatedly presented with a range of artificial, prey type electric fields (E fields) under laboratory conditions […]

Shark bite wounds of the valvular intestine: The cause of an acute mortality syndrome of captive blacktip reef sharks, Carcharhinus melanopterus

Abstract 10.1002/zoo.1430100604.abs During 1987–1990 nine cases of mortality in captive blacktip reef sharks (Carcharhinus melanopterus) were attributed to bite wounds to the valvular intestine. Necropsies revealed lacerations, amputation of the scroll valve folds, or complete severance of the valvular intestine. Wounding resulting from attack by tankmates occurred during episodes of intestinal eversion, an apparently regular […]

Construction and test of an artificial uterus for ex situ development of shark embryos

An artificial uterus (AU) was constructed from clear and opaque acrylic and life-support and monitoring systems were attached. The dwarf ornate wobbegong shark (Orectolobus ornatus) was used to test the AU because recent research has shown that during pregnancy the uterine fluid composition changes with mid- to late-term embryos immersed in seawater. An artificial uterine […]

Husbandry and growth rates of neonate epaulette sharks, Hemiscyllium ocellatum in captivity

In this report, I describe husbandry techniques that are used to successfully hatch and raise epaulette sharks, Hemiscyllium ocellatum, in captivity. Egg cases and hatchlings were held in floating baskets within a 1,306-L tank, at water temperatures of 24.4–25.5°C. From 56 egg cases, 27 neonates successfully hatched, and 22 survived. Based on seven tagged egg […]

Seasonality and site fidelity of the zebra shark, Stegostoma fasciatum, in southeast Queensland, Australia

Site fidelity and migratory movements of vertebrate animals occur at many spatial and temporal scales. Larger migratory movements tend to occur in species that live in seasonal environments in which food supplies vary markedly, while species found in thermally stable environments are more site-attached. In the marine environment, seasonal migrations are often associated with predictable […]