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Lam CH, Tsontos VM. Integrated management and visualization of electronic tag data with Tagbase. PLoS One 2011; 6:e21810. [PMID: 21750734 PMCID: PMC3130046 DOI: 10.1371/journal.pone.0021810] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Accepted: 06/08/2011] [Indexed: 11/29/2022] Open
Abstract
Electronic tags have been used widely for more than a decade in studies of diverse marine species. However, despite significant investment in tagging programs and hardware, data management aspects have received insufficient attention, leaving researchers without a comprehensive toolset to manage their data easily. The growing volume of these data holdings, the large diversity of tag types and data formats, and the general lack of data management resources are not only complicating integration and synthesis of electronic tagging data in support of resource management applications but potentially threatening the integrity and longer-term access to these valuable datasets. To address this critical gap, Tagbase has been developed as a well-rounded, yet accessible data management solution for electronic tagging applications. It is based on a unified relational model that accommodates a suite of manufacturer tag data formats in addition to deployment metadata and reprocessed geopositions. Tagbase includes an integrated set of tools for importing tag datasets into the system effortlessly, and provides reporting utilities to interactively view standard outputs in graphical and tabular form. Data from the system can also be easily exported or dynamically coupled to GIS and other analysis packages. Tagbase is scalable and has been ported to a range of database management systems to support the needs of the tagging community, from individual investigators to large scale tagging programs. Tagbase represents a mature initiative with users at several institutions involved in marine electronic tagging research.
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Affiliation(s)
- Chi Hin Lam
- Marine Environmental Biology, Department of Biological Sciences, University of Southern California, Los Angeles, California, United States of America.
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Benson SR, Eguchi T, Foley DG, Forney KA, Bailey H, Hitipeuw C, Samber BP, Tapilatu RF, Rei V, Ramohia P, Pita J, Dutton PH. Large-scale movements and high-use areas of western Pacific leatherback turtles,Dermochelys coriacea. Ecosphere 2011. [DOI: 10.1890/es11-00053.1] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Galli GLJ, Lipnick MS, Shiels HA, Block BA. Temperature effects on Ca2+ cycling in scombrid cardiomyocytes: a phylogenetic comparison. ACTA ACUST UNITED AC 2011; 214:1068-76. [PMID: 21389190 DOI: 10.1242/jeb.048231] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Specialisations in excitation-contraction coupling may have played an important role in the evolution of endothermy and high cardiac performance in scombrid fishes. We examined aspects of Ca(2+) handling in cardiomyocytes from Pacific bonito (Sarda chiliensis), Pacific mackerel (Scomber japonicus), yellowfin tuna (Thunnus albacares) and Pacific bluefin tuna (Thunnus orientalis). The whole-cell voltage-clamp technique was used to measure the temperature sensitivity of the L-type Ca(2+) channel current (I(Ca)), density, and steady-state and maximal sarcoplasmic reticulum (SR) Ca(2+) content (ssSR(load) and maxSR(load)). Current-voltage relations, peak I(Ca) density and charge density of I(Ca) were greatest in mackerel and yellowfin at all temperatures tested. I(Ca) density and kinetics were temperature sensitive in all species studied, and the magnitude of this response was not related to the thermal preference of the species. SR(load) was greater in atrial than in ventricular myocytes in the Pacific bluefin tuna, and in species that are more cold tolerant (bluefin tuna and mackerel). I(Ca) and SR(load) were particularly small in bonito, suggesting the Na(+)/Ca(2+) exchanger plays a more pivotal role in Ca(2+) entry into cardiomyocytes of this species. Our comparative approach reveals that the SR of cold-tolerant scombrid fishes has a greater capacity for Ca(2+) storage. This specialisation may contribute to the temperature tolerance and thermal niche expansion of the bluefin tuna and mackerel.
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Affiliation(s)
- Gina L J Galli
- Hopkins Marine Station of Stanford University, 120 Oceanview Boulevard, Pacific Grove, CA 93950, USA.
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Site fidelity and sex-specific migration in a mobile apex predator: implications for conservation and ecosystem dynamics. Anim Behav 2011. [DOI: 10.1016/j.anbehav.2011.02.011] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pedersen MW, Patterson TA, Thygesen UH, Madsen H. Estimating animal behavior and residency from movement data. OIKOS 2011. [DOI: 10.1111/j.1600-0706.2011.19044.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Armsworth PR, Block BA, Eagle J, Roughgarden JE. The role of discounting and dynamics in determining the economic efficiency of time-area closures for managing fishery bycatch. THEOR ECOL-NETH 2010. [DOI: 10.1007/s12080-010-0093-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shiels HA, Di Maio A, Thompson S, Block BA. Warm fish with cold hearts: thermal plasticity of excitation-contraction coupling in bluefin tuna. Proc Biol Sci 2010; 278:18-27. [PMID: 20667881 DOI: 10.1098/rspb.2010.1274] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Bluefin tuna have a unique physiology. Elevated metabolic rates coupled with heat exchangers enable bluefin tunas to conserve heat in their locomotory muscle, viscera, eyes and brain, yet their hearts operate at ambient water temperature. This arrangement of a warm fish with a cold heart is unique among vertebrates and can result in a reduction in cardiac function in the cold despite the elevated metabolic demands of endothermic tissues. In this study, we used laser scanning confocal microscopy and electron microscopy to investigate how acute and chronic temperature change affects tuna cardiac function. We examined the temporal and spatial properties of the intracellular Ca2+ transient (Δ[Ca2+]i) in Pacific bluefin tuna (Thunnus orientalis) ventricular myocytes at the acclimation temperatures of 14°C and 24°C and at a common test temperature of 19°C. Acute (less than 5 min) warming and cooling accelerated and slowed the kinetics of Δ[Ca2+]i, indicating that temperature change limits cardiac myocyte performance. Importantly, we show that thermal acclimation offered partial compensation for these direct effects of temperature. Prolonged cold exposure (more than four weeks) increased the amplitude and kinetics of Δ[Ca2+]i by increasing intracellular Ca2+ cycling through the sarcoplasmic reticulum (SR). These functional findings are supported by electron microscopy, which revealed a greater volume fraction of ventricular SR in cold-acclimated tuna myocytes. The results indicate that SR function is crucial to the performance of the bluefin tuna heart in the cold. We suggest that SR Ca2+ cycling is the malleable unit of cellular Ca2+ flux, offering a mechanism for thermal plasticity in fish hearts. These findings have implications beyond endothermic fish and may help to delineate the key steps required to protect vertebrate cardiac function in the cold.
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Affiliation(s)
- H A Shiels
- Faculty of Life Sciences, The University of Manchester, Core Technology Facility, Grafton Street, Manchester M13 9PL, UK.
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Clark TD, Brandt WT, Nogueira J, Rodriguez LE, Price M, Farwell CJ, Block BA. Postprandial metabolism of Pacific bluefin tuna (Thunnus orientalis). J Exp Biol 2010; 213:2379-85. [DOI: 10.1242/jeb.043455] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARY
Specific dynamic action (SDA) is defined as the energy expended during ingestion, digestion, absorption and assimilation of a meal. This study presents the first data on the SDA response of individual tunas of any species. Juvenile Pacific bluefin tunas (Thunnus orientalis; body mass 9.7–11.0 kg; N=7) were individually fed known quantities of food consisting primarily of squid and sardine (meal energy range 1680–8749 kJ, ~4–13% of tuna body mass). Oxygen consumption rates () were measured in a swim tunnel respirometer during the postprandial period at a swimming speed of 1 body length (BL) s−1 and a water temperature of 20°C. was markedly elevated above routine levels in all fish following meal consumption [routine metabolic rate (RMR)=174±9 mg kg−1 h−1]. The peak during the SDA process ranged from 250 to 440 mg kg−1 h−1 (1.5–2.3 times RMR) and was linearly related to meal energy content. The duration of the postprandial increment in ranged from 21 h to 33 h depending upon meal energy content. Consequently, the total energy used in SDA increased linearly with meal energy and ranged from 170 kJ to 688 kJ, such that the SDA process accounted for 9.2±0.7% of ingested energy across all experiments. These values suggest rapid and efficient food conversion in T. orientalis in comparison with most other fishes. Implanted archival temperature tags recorded the increment in visceral temperature (TV) in association with SDA. returned to routine levels at the end of the digestive period 2–3 h earlier than TV. The qualitative patterns in and TV during digestion were similar, strengthening the possibility that archival measurements of TV can provide new insight into the energetics and habitat utilization of free-swimming bluefin in the natural environment. Despite efficient food conversion, SDA is likely to represent a significant component of the daily energy budget of wild bluefin tunas due to a regular and high ingestion of forage.
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Affiliation(s)
- T. D. Clark
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, Canada, V6T 1Z4
| | - W. T. Brandt
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
| | - J. Nogueira
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
| | - L. E. Rodriguez
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
| | - M. Price
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
| | - C. J. Farwell
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
| | - B. A. Block
- Tuna Research and Conservation Center, Stanford University, Hopkins Marine Station/Monterey Bay Aquarium, Pacific Grove, CA 93950, USA
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