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Besel, Diana; Hauber, Mark E; Hunter, Colin; Ward-Smith, Tamsin; Raubenheimer, David; Millar, Craig D; Ismar, Stefanie M (2018): Spatial assessment of foraging patterns of the Australasian gannet (Morus serrator) during three breeding seasons (2007/08, 2008/09, 2009/10) at Hawke's Bay, New Zealand. PANGAEA, https://doi.org/10.1594/PANGAEA.887798, Supplement to: Besel, D et al. (2018): Multifactorial roles of interannual variability, season, and sex for foraging patterns in a sexually size monomorphic seabird, the Australasian gannet (Morus serrator). Marine Biology, 165(4), https://doi.org/10.1007/s00227-018-3332-0

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Abstract:
Marine top predators forage in environments that show potentially extreme temporal and spatial variation in prey availability, with reproductive success being crucially linked to food supply. Multiple factors of interannual and sexual variation, as well as variation across breeding stages, can shape patterns of spatial use in foraging seabirds, yet studies that address all of these variables simultaneously are rare. We present spatial assessment of foraging patterns by µGPS tracking of a sexually size monomorphic, long-lived species, the Australasian gannet (Morus serrator). The study spanned the incubation and chick-rearing stages in three consecutive breeding seasons. Our findings revealed high interannual variability in foraging distances and trip durations, but no consistent differences between birds across different breeding stages or the sexes. The exception was that core foraging areas were different for female and male Australasian gannets, although trip durations or distances were similar for both sexes. Our results also indicate bimodality in foraging distance and trip duration in this species, while highlighting interannual variability in the extent of bimodality. These findings contribute to a scarcely documented type of foraging behaviour in the seabird family of the Sulidae. Overall, these spatial use patterns provide a baseline for understanding the evolution of sex-specific foraging differences in biparental seabirds, and the extent to which these differences might help in securing breeding success across years of variable food availability.
Coverage:
Latitude: -39.633333 * Longitude: 177.083333
Event(s):
Hawkes-Bay_Plateau-Colony * Latitude: -39.633333 * Longitude: 177.083333 * Method/Device: Bird observation (BIRDOBS)
Comment:
Data shown in this dataset were used for Figure 1. Shapefiles for Figure 2 are available on request.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
IdentificationIDIsmar, Stefanie MBird ID
SpeciesSpeciesIsmar, Stefanie M
SexSexIsmar, Stefanie M
NumberNoIsmar, Stefanie MTrip number
Date/time startDate/time startIsmar, Stefanie M
Date/time endDate/time endIsmar, Stefanie M
Time in hoursTimehIsmar, Stefanie Mtracked
Breeding stageBreeding stageIsmar, Stefanie M
SeasonSeasonIsmar, Stefanie M
10 DurationDurationhIsmar, Stefanie Mtrip
11 DistanceDistancekmIsmar, Stefanie Mcovered
12 DistanceDistancekmIsmar, Stefanie Mmax from colony
13 Speedvkm/hIsmar, Stefanie Maverage flight speed
Size:
1144 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


ID
(Bird ID)

Species

Sex

No
(Trip number)

Date/time start

Date/time end

Time [h]
(tracked)

Breeding stage

Season
10 
Duration [h]
(trip)
11 
Distance [km]
(covered)
12 
Distance [km]
(max from colony)
13 
v [km/h]
(average flight speed)
782Morus serratorfemale12009-01-182009-01-2043.34chick provisioning2008-20097.96139.07364.29519.88
782Morus serratorfemale22009-01-182009-01-2043.34chick provisioning2008-20092.6139.25813.55518.43
782Morus serratorfemale32009-01-182009-01-2043.34chick provisioning2008-200921.65184.78249.6298.37
782Morus serratorfemale42009-01-182009-01-2043.34chick provisioning2008-20091.6018.4206.69217.35
836Morus serratormale12010-02-022010-02-0445.79chick provisioning2009-201022.00117.95428.3133.34
869Morus serratorfemale12010-01-272010-01-2929.41chick provisioning2009-201020.0796.79923.3076.55
893Morus serratormale12008-02-182008-02-1945.60chick provisioning2007-200814.6799.39729.4917.44
893Morus serratormale22008-02-182008-02-1945.60chick provisioning2007-200811.6266.44128.5085.25
923Morus serratorfemale12009-01-132009-01-1429.74chick provisioning2008-20092.9543.08318.31015.13
924Morus serratormale12009-02-152009-02-1861.96chick provisioning2008-200957.28193.31122.6994.42
925Morus serratormale12009-10-222009-10-2557.37mating stage2009-20104.9452.64319.44516.09
925Morus serratormale22009-10-222009-10-2557.37mating stage2009-20100.301.2240.59010.70
925Morus serratormale32009-10-222009-10-2557.37mating stage2009-20106.96128.36942.79819.80
925Morus serratormale42009-10-222009-10-2557.37mating stage2009-20100.371.9500.8755.87
944Morus serratormale12010-02-012010-02-0456.75chick provisioning2009-201028.27382.912148.24214.05
960Morus serratormale12008-10-292008-10-3148.08incubation2008-200926.29401.098128.82916.93
963Morus serratormale12008-12-082008-12-1048.69parental care2008-200927.30284.39266.60911.64
963Morus serratormale22008-12-082008-12-1048.69parental care2008-20092.284.1901.7081.94
966Morus serratorfemale12007-10-162007-10-1867.13incubation2007-200812.2835.65414.1204.35
966Morus serratorfemale22007-10-162007-10-1867.13incubation2007-20083.979.3772.5182.75
966Morus serratorfemale32007-10-162007-10-1867.13incubation2007-20080.621.1221.2082.47
971Morus serratormale12010-01-252010-01-2629.42chick provisioning2009-201014.27159.29746.1429.47
979Morus serratorfemale12009-01-182009-01-2160.11chick provisioning2008-200910.94125.12249.15012.38
979Morus serratorfemale22009-01-182009-01-2160.11chick provisioning2008-20096.6383.79736.32613.20
979Morus serratorfemale32009-01-182009-01-2160.11chick provisioning2008-200912.30157.04649.90815.08
979Morus serratorfemale42009-01-182009-01-2160.11chick provisioning2008-20092.2920.9428.1669.14
A25Morus serratorfemale12009-12-032009-12-0666.75incubation2009-201047.27205.09137.1455.90
A25Morus serratorfemale12009-10-262009-10-2836.38mating stage2009-20104.3331.57913.0147.08
A74Morus serratorfemale12009-01-112009-01-1346.91chick provisioning2008-20099.62175.34762.83918.74
A74Morus serratorfemale22009-01-112009-01-1346.91chick provisioning2008-20090.622.0940.9552.77
A74Morus serratorfemale32009-01-112009-01-1346.91chick provisioning2008-200912.60106.93740.1218.44
A79Morus serratormale12007-10-162007-10-1621.45incubation2007-200813.8989.57922.2009.30
A79Morus serratormale22007-10-162007-10-1621.45incubation2007-20082.656.5222.6243.05
A89Morus serratorfemale12008-11-022008-11-0325.09incubation2008-20090.614.0601.0112.33
B35Morus serratorfemale12010-01-272010-01-2930.43chick provisioning2009-201017.61159.46948.12110.64
B35Morus serratorfemale12007-11-202007-11-2131.08incubation2007-20080.451.5080.9865.64
B35Morus serratorfemale22007-11-202007-11-2131.08incubation2007-200820.7281.11518.3135.66
D20Morus serratorfemale12008-11-022008-11-0569.38incubation2008-20091.932.1750.8871.18
D20Morus serratorfemale22008-11-022008-11-0569.38incubation2008-200928.91103.80918.3114.43
D30Morus serratormale12009-01-112009-01-1454.74chick provisioning2008-20099.2773.00021.45110.80
D30Morus serratormale22009-01-112009-01-1454.74chick provisioning2008-20099.7081.67130.9978.45
D33Morus serratorfemale12009-10-262009-10-2847.62mating stage2009-20104.3255.72525.26011.92
D33Morus serratorfemale22009-10-262009-10-2847.62mating stage2009-20100.656.7112.57317.56
D33Morus serratorfemale32009-10-262009-10-2847.62mating stage2009-20109.72216.25962.34623.62
D40Morus serratorfemale12007-12-102007-12-1131.61NA2007-20087.4277.46620.2299.67
D45Morus serratormale12009-01-182009-01-2052.07chick provisioning2008-200911.26165.96165.02912.60
D45Morus serratormale22009-01-182009-01-2052.07chick provisioning2008-20091.007.3163.56118.35
D45Morus serratormale32009-01-182009-01-2052.07chick provisioning2008-20094.3956.47523.48414.38
D60Morus serratormale12009-02-172009-02-1846.06chick provisioning2008-200926.61116.93023.5285.57
D60Morus serratormale22009-02-172009-02-1846.06chick provisioning2008-20092.322.6531.3551.97
D66Morus serratorNA12010-01-252010-01-2748.10chick provisioning2009-201028.62288.04380.24110.72
D92Morus serratormale12009-10-222009-10-2554.71mating stage2009-20100.331.9081.27115.55
D92Morus serratormale22009-10-222009-10-2554.71mating stage2009-20100.601.7600.8641.88
D92Morus serratormale32009-10-222009-10-2554.71mating stage2009-20103.2736.03012.23413.89
D92Morus serratormale42009-10-222009-10-2554.71mating stage2009-20104.9473.76324.88520.34
H00Morus serratorfemale12009-12-082009-12-1055.74incubation2009-20108.6028.07711.7863.99
H02Morus serratormale12008-01-132008-01-1426.41chick provisioning2007-200820.11269.92388.32314.18
H05Morus serratormale12009-01-182009-01-2154.72chick provisioning2008-20095.6168.83228.84916.05
H05Morus serratormale22009-01-182009-01-2154.72chick provisioning2008-20093.0248.12320.63516.16
H08Morus serratorfemale12008-10-312008-11-0140.38incubation2008-20093.6164.61624.49015.01
H16Morus serratormale12009-01-112009-01-1454.37chick provisioning2008-20093.6149.59222.55511.92
H16Morus serratormale22009-01-112009-01-1454.37chick provisioning2008-20091.9915.8834.86411.59
H16Morus serratormale32009-01-112009-01-1454.37chick provisioning2008-20097.6074.46429.9339.93
H19Morus serratormale12009-01-112009-01-1335.42chick provisioning2008-20098.30176.36664.91323.61
H19Morus serratormale22009-01-112009-01-1335.42chick provisioning2008-20097.2773.57326.31210.43
H20Morus serratorfemale12008-12-082008-12-1032.41NA2008-200924.94224.84751.06010.14
H42Morus serratorfemale12008-12-082008-12-1050.38parental care2008-20093.942.5730.4851.70
H42Morus serratorfemale22008-12-082008-12-1050.38parental care2008-20092.621.9940.4262.47
H42Morus serratorfemale32008-12-082008-12-1050.38parental care2008-20092.246.7041.7025.11
H52Morus serratorfemale12008-01-132008-01-1530.96chick provisioning2007-20084.8163.23420.75912.07
H52Morus serratorfemale22008-01-132008-01-1530.96chick provisioning2007-200815.56120.91953.6939.27
H52Morus serratorfemale12008-10-292008-10-3157.72incubation2008-200922.61214.42559.15410.60
H52Morus serratorfemale22008-10-292008-10-3157.72incubation2008-20095.9499.72531.67118.33
H55Morus serratormale12009-10-212009-10-2223.75mating stage2009-20100.607.5813.37927.84
H55Morus serratormale22009-10-212009-10-2223.75mating stage2009-20101.2919.8966.39223.43
H55Morus serratormale32009-10-212009-10-2223.75mating stage2009-20105.2765.58822.01317.49
H58Morus serratormale12009-10-202009-10-2233.75mating stage2009-20107.24114.80744.45917.33
H58Morus serratormale22009-10-202009-10-2233.75mating stage2009-201013.28189.89459.63718.51
H63Morus serratorfemale12008-12-082008-12-1050.75parental care2008-200914.2961.11119.4986.38
H63Morus serratorfemale22008-12-082008-12-1050.75parental care2008-20092.275.9141.7404.98
H87Morus serratormale12009-02-152009-02-1758.07chick provisioning2008-200923.94104.27123.8974.84
H87Morus serratormale22009-02-152009-02-1758.07chick provisioning2008-20094.27115.66452.02827.05
H90Morus serratormale12008-10-302008-11-0131.42incubation2008-20091.9542.33920.25131.28
H90Morus serratormale22008-10-302008-11-0131.42incubation2008-20094.9449.3399.40314.47
H90Morus serratormale32008-10-302008-11-0131.42incubation2008-20091.9415.0266.5439.87
H96Morus serratormale12010-01-252010-01-2746.25chick provisioning2009-201026.60308.05982.52613.59
H96Morus serratormale12007-10-162007-10-1621.32incubation2007-200812.2835.10314.1004.25
H96Morus serratormale22007-10-162007-10-1621.32incubation2007-20083.939.2872.5182.90