Induction and duration of tonic immobility in the lemon shark, Negaprion brevirostris

Watsky, Mitchell A.; Gruber, Samuel H.

doi:10.1007/bf00004459

Cited by 55 publications

(30 citation statements)

References 12 publications

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“…Time between hooking and boating specimens was minimized (i.e., < 1 min). Sharks were subjected to tonic immobility during manual handling according to the method of Watsky and Gruber [1990]. Following the advice of Keyes (personal communication), the animals were transferred by boat in a 1.3-m-diameter, hemispherical, fiberglass, water-filled vessel, avoiding damage to their eyes and cephalofoil.…”

Section: Methodsmentioning

confidence: 99%

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

Young

Kajiura

Visser³

et al. 2002

Zoo Biology

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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 and impaired swimming patterns. The relationship between the transport vessel size and shark sizes, numbers, and swimming behavior was considered when formulating the transport regime. By balancing these factors and adopting a comprehensive water treatment method, it was possible to extend the duration of a successful transport by up to 60 hr. Implications for the future transport of S. lewini and other free-swimming sharks are discussed. Zoo Biol 21: 243-251, 2002.

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Section: Methodsmentioning

confidence: 99%

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

Young

Kajiura

Visser³

et al. 2002

Zoo Biology

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“…Shark capture, tagging and passive monitoring Juvenile lemon sharks were angled from Page, Kemps, and Broad Creek using conventional spinning gear and baited hooks (10-15 lb test, 5/0 or 7/0 circle hooks) between November 2005 and May 2007. Upon capture, tonic immobility was induced by restraining the shark and rapidly inverting it onto its back (see Watsky and Gruber 1990) to facilitate the implantation of an ultrasonic transmitter (model V16-4 L coded tags, 16 mm diameter, 52 mm long, 9 g, Vemco Inc., Shad Bay, NS). For implantation, a small (2-3 cm) incision was made to the left side of the ventral midline, anterior to the pelvic fins.…”

Section: Study Site and Hydrophone Array Set-upmentioning

confidence: 99%

Spatial ecology of juvenile lemon sharks (Negaprion brevirostris) in tidal creeks and coastal waters of Eleuthera, The Bahamas

et al. 2010

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Fisheries exploitation and habitat alteration are threatening lemon shark (Negaprion bevirostris) populations because they use nearshore regions as nursery sites. As such, there is a need for information on the spatial ecology of juvenile lemon sharks to identify critical habitats that require protection, as well as to understand their basic ecology. The purpose of this study was to determine the habitat preferences and movement patterns of juvenile lemon sharks along a sub-section of coastline characterized by coastal flats and tidal creeks of Eleuthera, The Bahamas. Eleven juvenile lemon sharks (766 ± 127 mm total length; mean±SD) were captured from various tidal creeks within the 23 km study area and were surgically implanted with acoustic transmitters. A series of 27 hydrophone receivers acted as a passive monitoring array to detect tagged individuals as they moved among habitats. Findings suggest that juvenile lemon sharks tagged in this study prefer shallow water habitats within tidal creeks, and typically display high site fidelity with occasional forays to alternate habitats or creeks. In fact, more Environ Biol Fish (2010) 89:95-104

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“…All sharks were captured, handled, and released in accordance with Massachusetts Division of Marine Fisheries regulations. Once landed, each shark was removed from the water, the hook was removed (if possible), and tonic immobility was induced by restraining the shark ventral side up in a V-shaped table lined with pre-wetted neoprene (Watsky & Gruber 1990). All sharks captured through out the study period were tagged externally with conventional NMFS shark tags (Kohler & Turner 2001), and a subset was tagged internally with individually coded acoustic transmitters (2008 and 2009: model V16-4L [nominal Vemco Division, AMIRIX Systems).…”

Section: Shark Capture and Taggingmentioning

confidence: 99%

Seasonal residency, habitat use, and site fidelity of juvenile sand tiger sharks Carcharias taurus in a Massachusetts estuary

Kneebone¹,

Chisholm²,

Skomal³

2012

Mar. Ecol. Prog. Ser.

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The sand tiger shark Carcharias taurus is a large coastal species that has endured marked declines in its western North Atlantic population over the past 30 yr. In the face of these declines, identification of nursery areas for this species is of particular importance to ensure the implementation of protective measures that will maximize survival of young individuals to maturity. Passive acoustic telemetry was used to assess the emergence of Plymouth, Kingston, Duxbury (PKD) Bay, Massachusetts, USA, as a seasonal nursery for juvenile sand tigers that migrate north from southern parturition grounds. Seasonal residency, habitat use, and site fidelity of 73 acoustically tagged juvenile sand tigers (78 to 108 cm fork length) were monitored within PKD Bay during 4 seasonal periods from 2008 to 2011. Eight individuals were tracked in multiple years, with 2 individuals returning to PKD Bay in 3 consecutive years. Sand tigers remained in PKD Bay for periods of 1 to 124 d and displayed a high degree of site fidelity to 2 core habitats during each year of the study. Weekly activity space estimates were relatively constant throughout each yearly monitoring period, with a general increase prior to emigration of sharks from the embayment. Emigration of sharks from PKD Bay was significantly related to both day length and water temperature. Collectively, these results suggest that PKD Bay constitutes a seasonal nursery area for juvenile sand tigers and warrants the extension of juvenile sand tiger essential fish habitat north of Cape Cod, Massachusetts, USA.

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Induction and duration of tonic immobility in the lemon shark, Negaprion brevirostris

Cited by 55 publications

References 12 publications

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

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

Spatial ecology of juvenile lemon sharks (Negaprion brevirostris) in tidal creeks and coastal waters of Eleuthera, The Bahamas

Seasonal residency, habitat use, and site fidelity of juvenile sand tiger sharks Carcharias taurus in a Massachusetts estuary

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