Erratum to: Demography and movement patterns of leopard sharks (Triakis semifasciata ) aggregating near the head of a submarine canyon along the open coast of southern California, USA

There are very few studies reporting isotopic trophic discrimination factors and turnover rates for marine elasmobranchs. A controlled laboratory experiment was conducted to estimate carbon and nitrogen isotope trophic discrimination factors and isotope turnover rates for blood, liver, muscle, cartilage tissue, and fin samples of neonate to young-of-the-year leopard sharks ( Triakis semifasciata ). Trophic discrimination factors varied (0.13‰–1.98‰ for δ13C and 1.08‰–1.76‰ for δ15N). Tissues reached or were close to isotopic equilibrium to the new diet after about a threefold biomass gain and 192 days. Liver and blood exhibited faster isotope turnover than muscle, cartilage tissue, and fin samples, and carbon isotopes turned over faster than those of nitrogen. Metabolic turnover contributed substantially to isotopic turnover, which differs from most reports for young marine teleosts. We modeled the relationship between muscle turnover rates and shark size by coupling laboratory results with growth rate estimates for natural populations. Model predictions for small, medium, and large wild leopard sharks indicate the time to isotopic equilibrium is from one to several years.

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Postprandial response of gastric pH in leopard sharks (Triakis semifasciata) and its use to study foraging ecology

Journal of Experimental Biology ◽

10.1242/jeb.00741 ◽

2004 ◽

Vol 207 (2) ◽

pp. 225-232 ◽

Cited By ~ 37

Author(s):

Y. P. Papastamatiou

Keyword(s):

Foraging Ecology ◽

Gastric Ph ◽

Postprandial Response ◽

Triakis Semifasciata ◽

Leopard Sharks

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Demography of the central california population of the Leopard Shark (Triakis semifasciata)

Marine and Freshwater Research ◽

10.1071/mf9920183 ◽

1992 ◽

Vol 43 (1) ◽

pp. 183 ◽

Cited By ~ 36

Author(s):

GM Cailliet

Keyword(s):

Population Growth ◽

Reproductive Rate ◽

Shark Species ◽

Sandbar Shark ◽

Lemon Shark ◽

Carcharhinus Plumbeus ◽

Net Reproductive Rate ◽

Leopard Shark ◽

Triakis Semifasciata ◽

Leopard Sharks

Demographic analyses can be quite useful for effectively managing elasmobranch fisheries. However, they require valid estimates of age-specific mortality and natality rates, in addition to information on the distribution, abundance, habits and reproduction of the population, to produce reliable estimates of population growth. Because such detailed ecological information is usually unavailable, complete demographic analyses have been completed for only four shark species: the spiny dogfish, Squalus acanthias; the soupfin shark, Galeorhinus australis; the lemon shark, Negaprion brevirostris; and most recently the sandbar shark, Carcharhinus plumbeus. In California, reliable estimates of age, growth, mortality, age at maturity, and fecundity are available only for the leopard shark, Triakis semifasciata. A demographic analysis of this species yielded a net reproductive rate (Ro) of 4.467, a generation time (G) of 22.35 years, and an estimate of the instantaneous population growth coefficient (r) of 0.067. If the mean fishing pressure over 10 years (F= 0.084) is included in the survivorship function, Ro and r are reduced considerably, especially if leopard sharks first enter the fishery at early ages. A size limit of 120 cm TL (estimated age 13 years), especially for female sharks, is tentatively proposed for the leopard shark fishery.

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Sheltering patterns and utilization following the 2007 southern California wildfires

American Journal of Disaster Medicine ◽

10.5055/ajdm.2009.0017 ◽

2009 ◽

Vol 4 (2) ◽

pp. 113-119 ◽

Cited By ~ 1

Author(s):

Thomas D. Kirsch, MD, MPH ◽

J. Lee Jenkins, MD, MPH ◽

Lauren M. Sauer, BA ◽

Yu-Hsiang Hsieh, PhD ◽

Emilie Calvello, MD, MPH ◽

...

Keyword(s):

Risk Factors ◽

Southern California ◽

Movement Patterns ◽

Red Cross ◽

American Red Cross ◽

Displaced Persons ◽

Factors Associated ◽

Johns Hopkins University

The 2007 southern California wildfires resulted in over 500,000 residents being displaced. A team from Johns Hopkins University and the American Red Cross surveyed 163 families at shelters and local assistance centers during the disaster. The responses were used to evaluate the needs and movement patterns of a displaced population.The data were also used to determine the risk factors associated with needing sheltering. There is a lower than expected reliance on public shelters, and displaced persons move frequently.

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Elevated body temperatures of adult female leopard sharks, Triakis semifasciata, while aggregating in shallow nearshore embayments: Evidence for behavioral thermoregulation?

Journal of Experimental Marine Biology and Ecology ◽

10.1016/j.jembe.2007.07.021 ◽

2007 ◽

Vol 352 (1) ◽

pp. 114-128 ◽

Cited By ~ 108

Author(s):

Barbara V. Hight ◽

Christopher G. Lowe

Keyword(s):

Adult Female ◽

Behavioral Thermoregulation ◽

Body Temperatures ◽

Triakis Semifasciata ◽

Leopard Sharks

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California spiny lobster (Panulirus interruptus) movement behaviour and habitat use: implications for the effectiveness of marine protected areas

Marine and Freshwater Research ◽

10.1071/mf12127 ◽

2013 ◽

Vol 64 (4) ◽

pp. 359 ◽

Cited By ~ 11

Author(s):

Kira R. Withy-Allen ◽

Kevin A. Hovel

Keyword(s):

Habitat Use ◽

Protected Areas ◽

Time Scales ◽

Marine Protected Areas ◽

Southern California ◽

Survival Rates ◽

Movement Patterns ◽

Habitat Associations ◽

Home Ranges ◽

Panulirus Interruptus

The effectiveness of conservation efforts, including marine protected areas (MPAs), hinges on adequate knowledge of movement patterns, habitat associations and habitat-specific survival rates of mobile organisms. California spiny lobsters (Panulirus interruptus) support commercial and recreational fishing in southern California; however, we lack basic information to determine whether MPAs planned for the region will enhance abundance. Working within and outside a small southern California MPA, we (1) quantified the movement patterns and home ranges of the lobster over two time scales, (2) determined lobster day and night habitat associations and (3) determined habitat-specific predation risk. Lobsters exhibited high site fidelity and small home ranges (geometric mean of 651 m2 and 5912 m2 per week, on the basis of 50% and 95% kernel utilisation distributions, respectively). Lobsters were associated with rocky habitat during the day and with the red algae Plocamium cartilagineum while feeding at night. Relative survival rates of lobsters were high across vegetated and unvegetated habitats at night, and were highest in surfgrass (Phyllopsadix torreyi) habitat during the day. Our results highlight the need to consider how movement patterns vary over short and long time scales, and how habitat use may vary from day to night for nocturnally active species such as lobsters, when planning MPAs.

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