Foraging behaviour and habitat use of a  short-ranging seabird, the crested tern

McLeay, L. J.; Page, Brad; Goldsworthy, Simon; Paton, David C.; Teixeira, Cláudia Fernanda Almeida; Burch, P; Ward, Tim M.

doi:10.3354/meps08606

Cited by 25 publications

(18 citation statements)

References 43 publications

(50 reference statements)

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“…Variation in foraging behaviour in response to aspects of habitat condition has been demonstrated in a wide range of mobile organisms, including seabirds (McLeay et al 2010), marine mammals (Augé et al 2011) and fish (Hoey & Bellwood 2011). A more in-depth understanding of foraging behaviour for coral reef fishes is critical in light of existing degradation of reefs (e.g.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Influence of habitat condition and competition on foraging behaviour of parrotfishes

Nash¹,

Graham²,

Januchowski‐Hartley³

et al. 2012

Mar. Ecol. Prog. Ser.

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Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Influence of habitat condition and competition on foraging behaviour of parrotfishes

Nash¹,

Graham²,

Januchowski‐Hartley³

et al. 2012

Mar. Ecol. Prog. Ser.

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“…As well as these behavioural studies, the use of seabird tracking data is also being applied to define important habitat types used by species (Wakefield, Phillips & Matthiopoulos ; McLeay et al . ) and to define important foraging areas (Harris et al . ; Yorio ).…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have ranged from determining the differences in foraging behaviour between species (Young et al 2010), sexes (Thaxter et al 2009;Weimerskirch et al 2009;Quintana et al 2011) and age classes (Votier et al 2011) to detecting intercolony (Zavalaga, Halls & Dell'Omo 2010) and interindividual variation (Hatch, Gill & Mulcahy 2010). As well as these behavioural studies, the use of seabird tracking data is also being applied to define important habitat types used by species (Wakefield, Phillips & Matthiopoulos 2009;McLeay et al 2010) and to define important foraging areas Yorio 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Whilst several foraging trips may be recorded for localized feeders, this approach may not reveal the potential variability in the foraging areas of species that make foraging trips of longer duration. Often in tracking studies, only one foraging trip may be recorded per individual, or only the first trip made by individuals is used to make predictions on foraging behaviour and preferred habitats (Gremillet et al 2008;McLeay et al 2010;Yorio et al 2010;Quintana et al 2011). Similarly, data loggers may be left on birds for longer periods than necessary, which may not add to the information that could have been gained from a shorter deployment if the birds are consistent in their foraging habits.…”

Section: Introductionmentioning

confidence: 99%

“…The data collected by seabird-tracking studies has already revealed interesting and important information such as seabirds' use of particular oceanic habitats (Louzao et al 2006;Bugoni, D'Alba & Furness 2009;Soanes et al 2013) and their foraging behaviour (Gremillet et al 2004;Lewis et al 2005;McLeay et al 2010;Grecian et al 2012;Lewison et al 2012). However, with the increasing importance and ecological application of seabird-tracking data, it is now time to consider how we can make the best use of resources that are being invested into this field.…”

Section: Introductionmentioning

confidence: 99%

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How many seabirds do we need to track to define home‐range area?

Soanes

Arnould

Dodd

et al. 2013

Journal of Applied Ecology

105

117

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Summary1. In recent years, marine predator and seabird tracking studies have become ever more popular. However, they are often conducted without first considering how many individuals should be tracked and for how long they should be tracked in order to make reliable predictions of a population's home-range area. 2. Home-range area analysis of two seabird-tracking data sets was used to define the area of active use (where birds spent 100% of their time) and the core foraging area (where birds spent 50% of their time). Analysis was conducted on the first foraging trip undertaken by the birds and then the first two, three and four foraging trips combined. Appropriate asymptotic models were applied to the data, and the calculated home-range areas were plotted as a function of an increasing number of individuals and trips included in the sample. Data were extrapolated from these models to predict the area of active use and the core foraging area of the colonies sampled. 3. Significant variability was found in the home-range area predictions made by analysis of the first foraging trip and the first four foraging trips combined. For shags, the first foraging trip predicted a 56% smaller area of active use when compared to the predictions made by combining the first four foraging trips. For kittiwakes, a 43% smaller area was predicted when comparing the first foraging trip with the four combined trips. 4. The number of individuals that would be required to predict the home range area of the colony depends greatly on the number of trips included in the analysis. This analysis predicted that 39 (confidence interval 29-73) shags and 83 (CI: 109-161) kittiwakes would be required to predict 95% of the area of active use when the first four foraging trips are included in the sample compared with 135 (CI 96-156) shags and 248 (164-484) kittiwakes when only the first trip is included in the analysis. 5. Synthesis and applications. Seabird and marine mammal tracking studies are increasingly being used to aid the designation of marine conservation zones and to predict important foraging areas. We suggest that many studies may be underestimating the size of these foraging areas and that better estimates could be made by considering both the duration and number of data logger deployments. Researchers intending to draw conclusions from tracking data should conduct a similar analysis of their data as used in this study to determine the reliability of their home-range area predictions.

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Factors affecting the foraging behaviour of the European shag: implications for seabird tracking studies

et al. 2014

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Seabird tracking has become an ever more popular tool to aid environmental procedures such as the designation of marine protected areas and environmental impact assessments. However, samples used are usually small and little consideration is given to experimental design and sampling protocol. European shags Phalacrocorax aristotelis were tracked using GPS technology over three breeding seasons and the following foraging trip characteristics: trip duration, trip distance, maximum distance travelled from the colony, size of area used and direction travelled from colony were determined for each foraging trip. The effect of sex, year of study, breeding site, number and age of chicks and the timing of tracking on foraging behaviour were investigated using a General Estimation Equation model. A range of sampling scenarios reflecting likely field sampling were also tested to compare how foraging behaviour differed depending on composition of the sample of birds tracked. Trip distance, trip duration, maximum distance travelled and size of area used were all significantly affected by the breeding site, and the number of chicks a tracked adult was raising. The effect of sex was also seen when examining trip distance, trip duration and the maximum distance travelled. The direction travelled on a foraging trip was also significantly affected by breeding site. This study highlights the importance of sampling regime and the influence that year, sex, age, number of chicks and breeding site can have on the foraging trip characteristics for this coastal feeding seabird. Given the logistical and financial constraints in tracking large numbers of individuals, this study identifies the need for researchers to consider the composition of their study sample to ensure any identified foraging areas are as representative as possible of the whole colony’s foraging area.

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Foraging behaviour and habitat use of a short-ranging seabird, the crested tern

Cited by 25 publications

References 43 publications

Influence of habitat condition and competition on foraging behaviour of parrotfishes

Influence of habitat condition and competition on foraging behaviour of parrotfishes

How many seabirds do we need to track to define home‐range area?

Factors affecting the foraging behaviour of the European shag: implications for seabird tracking studies

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