Diel patterns in three-dimensional use of space by sea snakes

Udyawer, Vinay; Simpfendorfer, Colin A.; Heupel, Michelle R.

doi:10.1186/s40317-015-0063-6

Cited by 18 publications

(20 citation statements)

References 23 publications

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“…The nocturnal elevation in activity levels of free-roaming snakes in this study is consistent with previous findings from the same species within the study site (Udyawer, Simpfendorfer & Heupel 2015) as well as observations for other species confined to tanks (e.g. Hydrophis belcheri, Acrochordus granulatus; Heatwole & Seymour 1976;Heatwole et al 1978).…”

Section: T E M P O R a L P A T T E R N S I N A C T I V I T Y A N D E supporting

confidence: 92%

Temporal and spatial activity‐associated energy partitioning in free‐swimming sea snakes

2017

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Summary Partitioning energy between critical basal functions and activity‐associated behaviours is a primary determinant of animal survival. Consequently, habitat selection is likely to be driven by the efficiency with which resources can be acquired from a heterogeneous energy landscape. Determining how energy partitioning is achieved across temporal and spatial scales is particularly challenging in aquatic animals due to the logistical limitations in estimating field metabolic rates (FMR) while simultaneously examining habitat choice. Here, acoustic telemetry using accelerometers alongside bimodal respirometry were used to correlate vectorial dynamic body acceleration (VeDBA) with oxygen consumption rates (V˙normalo2) of sea snakes (Hydrophis curtus and Hydrophis elegans) across an ecologically relevant temperature range. Subsequently, VeDBA of free‐roaming snakes was used to estimate activity‐associated FMR within a near‐shore environment over diel, seasonal and spatial scales. Diel changes in activity explained short‐term patterns in FMR, whereas seasonal changes in water temperature drove long‐term patterns. Spatial analyses demonstrated that activity‐associated FMR was elevated in productive seagrass and mudflat habitats, indicative of a concentration of foraging efforts. Our findings illustrate for the first time how sea snakes partition activity‐associated FMR across time and space, providing an approach by which we can monitor the impacts of, and vulnerabilities to, natural and anthropogenic disturbances like warming and trawl fisheries. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.12882/suppinfo is available for this article.

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Section: T E M P O R a L P A T T E R N S I N A C T I V I T Y A N D E supporting

confidence: 92%

Temporal and spatial activity‐associated energy partitioning in free‐swimming sea snakes

2017

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“…Such overestimation may mask possible social behaviours (such as territoriality) or reduce the ability to detect niche partitioning between competitors if the animals being studied employ 3D movements. In addition, 3D KUDs have been used to detect diel changes in space use and habitat use of sea snakes (Hydrophis [Lapemis] curtus and H. elegans) in relation to predator−prey relationships (Udyawer et al 2015b), and to identify the environmental variables driving movement of one of these species (H. curtus; Udyawer et al 2015a). However, these studies used a pairwise comparison of the proportion of total home range size that each animal overlapped with, which has been suggested to overestimate the degree of overlap between individuals as it ignores the relative probability of use (i.e.…”

Section: Introductionmentioning

confidence: 99%

The ocean has depth: two- versus three-dimensional space use estimators in a demersal reef fish

Lee¹,

Huveneers²,

Duong³

et al. 2017

Mar. Ecol. Prog. Ser.

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Most aquatic animals employ 3-dimensional (3D) movements to fully exploit the resources of the environment they inhabit. Many of these animals, however, are impossible to observe directly, making it necessary to use indirect methods of observation such as biotelemetry in order to study them. Despite technological advances with tracking equipment enabling movement to be assessed in 3 dimensions, many studies restrict their analyses to traditional 2-dimensional (2D) space use. We compared 2D and 3D (1) core and home range size, (2) home range overlap and (3) changes in space use in relation to biological and environmental variables of a large, demersal reef-dwelling fish species, the eastern blue groper Achoerodus viridis, tracked using passive acoustic telemetry. Mixed effects models were used to determine differences between the core/home range sizes and home range overlap between the sex of the fish and the breeding and non-breeding seasons. The 2D analyses were unable to detect differences in core and home range sizes between the sexes that were successfully identified by the 3D analyses. 2D analyses only detected differences in home range overlap between the breeding and non-breeding seasons, whereas the 3D analyses found seasonal differences according to the sex of the fish. Two-hourly 2D space use estimates failed to detect differences in space use between fished and protected areas that were detected in the 3D analyses. This study demonstrates that to truly understand how animals use the space they inhabit, we must assess their movement in the full spatial context of their environment.

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“…Integration of multiple data streams, such as environmental variables, to help interpret movements and space-use, also enhance the value of telemetry data but present new analytical and data management challenges (see below). Finally, technological advances, including sensors integrated into transmitters, provide another layer of data complexity, while concomitantly providing an opportunity to develop a refined sense of movement in three dimensions (Simpfendorfer et al, 2012;Udyawer et al, 2015;Lee et al, 2017).…”

Section: Analysis Of Animal Telemetry Data For Movement Ecologymentioning

confidence: 99%

Animal-Borne Telemetry: An Integral Component of the Ocean Observing Toolkit

et al. 2019

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Animal telemetry is a powerful tool for observing marine animals and the physical environments that they inhabit, from coastal and continental shelf ecosystems to polar seas and open oceans. Satellite-linked biologgers and networks of acoustic receivers allow animals to be reliably monitored over scales of tens of meters to thousands of kilometers, giving insight into their habitat use, home range size, the phenology of migratory patterns and the biotic and abiotic factors that drive their distributions. Furthermore, physical environmental variables can be collected using animals as autonomous sampling platforms, increasing spatial and temporal coverage of global oceanographic observation systems. The use of animal telemetry, therefore, has the capacity to provide measures from a suite of essential ocean variables (EOVs) for improved monitoring of Earth's oceans. Here we outline the design features of animal telemetry systems, describe current applications and their benefits and challenges, and discuss future directions. We describe new analytical techniques that improve our ability to not only quantify animal movements but to also provide a powerful framework for comparative studies across taxa. We discuss the application of animal telemetry and its capacity to collect biotic and abiotic data, how the data collected can be incorporated into ocean observing systems, and the role these data can play in improved ocean management.

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Diel patterns in three-dimensional use of space by sea snakes

Cited by 18 publications

References 23 publications

Temporal and spatial activity‐associated energy partitioning in free‐swimming sea snakes

Temporal and spatial activity‐associated energy partitioning in free‐swimming sea snakes

The ocean has depth: two- versus three-dimensional space use estimators in a demersal reef fish

Animal-Borne Telemetry: An Integral Component of the Ocean Observing Toolkit

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