The effects of temperature and swimming speed on the metabolic rate of the nurse shark (Ginglymostoma cirratum, Bonaterre)

Whitney, Nicholas M.; Lear, Karissa O.; Gaskins, Lindsay C.; Gleiss, Adrian C.

doi:10.1016/j.jembe.2015.12.009

Cited by 58 publications

(52 citation statements)

References 46 publications

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“…Temperature and dissolved oxygen (DO) were recorded every 5 min and swimming speed and B T frequency were timed visually via an overhead camera three times in every 5 min period (Whitney et al . , ). Trials began with DO near 100% saturation and were run until the DO reached 80% saturation, lasting an average (± S.D .)…”

Section: Measurements and Oxygen Consumption Rates (ṁO2) Of Carcharhimentioning

confidence: 97%

“…The full tag package measured 37 × 36 × 13 mm and weighed c. 23 g in air, representing 1.6-2.2% of the mass of study animals. Based on specifications reported by the tag manufacturers, the submerged weight of the tag package was 5.9 g, representing 8-12% of the sub- Respirometry trials were conducted in a closed static respirometer with a diameter of 2.45 m and a volume of 2,494 l, with the system described in detail in Lear et al (2017) and Whitney et al (2016).…”

mentioning

confidence: 99%

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Metabolic rates and the energetic cost of external tag attachment in juvenile blacktip sharks Carcharhinus limbatus

Lear

Gleiss

Whitney

2018

Journal of Fish Biology

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This study reports on the metabolic rate of the blacktip shark Carcharhinus limbatus and the energetic costs of external tag attachment. Metabolic rates, swimming speed and tail‐beat (BT) frequency were measured in a static respirometer with untagged animals and animals equipped with a small data logger. Tagged sharks showed significantly higher routine oxygen consumption and lower swimming speeds than untagged animals, indicating that tagging significantly affected the swimming efficiency and energetic requirements in these small sharks, and that these effects must be accounted for when interpreting telemetry data from free‐ranging individuals.

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Section: Measurements and Oxygen Consumption Rates (ṁO2) Of Carcharhimentioning

confidence: 97%

mentioning

confidence: 99%

Metabolic rates and the energetic cost of external tag attachment in juvenile blacktip sharks Carcharhinus limbatus

Lear

Gleiss

Whitney

2018

Journal of Fish Biology

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“…at similar temperatures (Table 1). Some of the nurse shark metabolic rate data were previously published in Whitney et al (2016).…”

Section: Resultsmentioning

confidence: 99%

“…As the same amount of muscle contraction is required per unit of increased activity regardless of temperature, this activation energy would also be expected to remain constant, while temperature increases the SMR. A handful of previous studies have examined the relationship between ODBA or swimming speed, ṀO 2 and temperature in fish, with similar results, determining that temperature does not significantly affect the slope of the relationship between swimming speed and metabolism in some fish species (Claireaux et al, 2006;Whitney et al, 2016), or between ODBA and metabolism in American lobster (Lyons et al, 2013). However, The top five models including both temperature (Temp) and ODBA are shown, along with models including only temperature and activity state (AS), and those including only temperature.…”

Section: Temperature Effects In Odba-ṁ O2 Calibrationsmentioning

confidence: 86%

“…Trials were conducted in a circular, closed respirometer constructed from a modified fibreglass holding tank with a diameter of 2.45 m, as described in Whitney et al (2016). Briefly, the respirometer was sealed using a lid constructed from a PVC frame with plastic sheeting stretched across it, and dissolved oxygen (DO) and temperature were measured using a handheld DO meter (model Pro Plus, Yellow Springs Instruments, Yellow Springs, OH, USA).…”

Section: Respirometrymentioning

confidence: 99%

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Correlations of metabolic rate and body acceleration in three species of coastal sharks under contrasting temperature regimes

Lear

Whitney

Brewster

et al. 2016

Journal of Experimental Biology

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The ability to produce estimates of the metabolic rate of free-ranging animals is fundamental to the study of their ecology. However, measuring the energy expenditure of animals in the field has proved difficult, especially for aquatic taxa. Accelerometry presents a means of translating metabolic rates measured in the laboratory to individuals studied in the field, pending appropriate laboratory calibrations. Such calibrations have only been performed on a few fish species to date, and only one where the effects of temperature were accounted for. Here, we present calibrations between activity, measured as overall dynamic body acceleration (ODBA), and metabolic rate, measured through respirometry, for nurse sharks (Ginglymostoma cirratum), lemon sharks (Negaprion brevirostris) and blacktip sharks (Carcharhinus limbatus). Calibrations were made at a range of volitional swimming speeds and experimental temperatures. Linear mixed models were used to determine a predictive equation for metabolic rate based on measured ODBA values, with the optimal model using ODBA in combination with activity state and temperature to predict metabolic rate in lemon and nurse sharks, and ODBA and temperature to predict metabolic rate in blacktip sharks. This study lays the groundwork for calculating the metabolic rate of these species in the wild using acceleration data.

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Influence of female reproductive state and of fishing‐capture stress on the oxygen uptake rate of a viviparous elasmobranch

2023

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In animals discarded after a fishing capture event, the elicited stress response necessary to ensure their survival is energetically costly. This energy is diverted from other important biological activities, including growth and reproduction, possibly impairing them. Given that elasmobranchs are among the most threatened vertebrate groups, estimating capture‐induced energetic changes and comparing these variations to the energy requirements of pregnancy maintenance is necessary. In pregnant southern fiddler rays (Trygonorrhina dumerilii), we measured changes in oxygen uptake rate (ṀO2; a proxy for metabolic rate and energy usage) in response to trawling simulation and air exposure, and estimated the oxygen requirements of sustaining late‐term pregnancy and embryos. ṀO2 was measured in pregnant females, before (prestress ṀO2) and after trawling simulation (after‐capture ṀO2), and again after females gave birth (postpartum ṀO2). After‐capture ṀO2 was 31.7% lower than ṀO2 measured in minimally stressed females, suggesting a reduction in energy expenditure. This reduction is likely triggered by an initially excessive energetic investment in the stress response, and is aimed at shutting down nonessential activities to redirect energy to processes fundamental for survival. Prestress ṀO2 was 78.5% higher than postpartum ṀO2. Capture simulation decreased ṀO2 to values similar to those observed postpartum, suggesting a capture‐induced reduction in oxygen and energy allocation to pregnancy and embryonic respiration, which could be associated with reproductive impairments. These data, by better estimating the impact of capture and discard on energetic requirements and reproductive fitness, may support the introduction of area and/or seasonal closures to fishing.

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The effects of temperature and swimming speed on the metabolic rate of the nurse shark (Ginglymostoma cirratum, Bonaterre)

Cited by 58 publications

References 46 publications

Metabolic rates and the energetic cost of external tag attachment in juvenile blacktip sharks Carcharhinus limbatus

Metabolic rates and the energetic cost of external tag attachment in juvenile blacktip sharks Carcharhinus limbatus

Correlations of metabolic rate and body acceleration in three species of coastal sharks under contrasting temperature regimes

Influence of female reproductive state and of fishing‐capture stress on the oxygen uptake rate of a viviparous elasmobranch

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