Foraging behaviour and success of Black-necked Storks (<i>Ephippiorhynchus asiaticus</i>) in Australia: implications for management

Dorfman, Eric; Lamont, Adam; Dickman, Chris R.

doi:10.1071/mu00008

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…Foraging data of the painted stork recorded on video were transferred to a computer and examined in the laboratory. Foraging observations on each individual were divided into five‐min feeding periods and the following parameters were estimated: (1) foot stirring: number of times the focal bird stirred the water with its legs (Erwin, Hafner & Dugan, 1985); (2) steps: number of steps taken by the focal bird (Frederick & Bildstein, 1992); (3) attempt: number of times the focal bird dipped its bill into the water (Maheswaran & Rahmani, 2002); (4) feeding rate: number of prey items captured by the focal bird (Frederick & Bildstein, 1992); (5) foraging success: the number of prey caught per attempts made (Dorfman, Lamont & Dickman, 2001). Group size was estimated as the number of conspecifics foraging within a potentially interactive distance, judged to be 12 painted stork bill length, which was c .…”

Section: Methodsmentioning

confidence: 99%

Foraging behaviour and prey size of the painted stork

Kalam

Urfi

2007

Journal of Zoology

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The foraging behaviour of painted stork Mycteria leucocephala was studied during 2004-2006 at 14 different sites in the Delhi region, India. Observations were recorded on 131 individuals, including 29 juvenile birds using a video camera. Recordings were also made at the nesting colony in Delhi zoo to study the prey sizes regurgitated to nestlings. The results confirm that the painted stork is a tactile forager and exclusively piscivorous. Foraging group size ranged from 1 to 18 individuals. Per 5 min foot stirring rates in the vegetated habitats were significantly higher than in non-vegetated habitats. The attempt rate and feeding rate in the breeding season were significantly higher than that in the non-breeding season. Prey sizes taken in the breeding season were significantly smaller than those taken in the non-breeding season. About 80% fish fed to the chicks were smaller than 10 cm. Young chicks were offered smaller prey compared with older chicks. The variations in foraging parameters are discussed in relation to habitats and their conservation in the Delhi region.

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Section: Methodsmentioning

confidence: 99%

Foraging behaviour and prey size of the painted stork

Kalam

Urfi

2007

Journal of Zoology

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“…Foraging was observed for a mean period of 12 days per month. Prey handling methods (Khuslan ,1977;Maheswaran and Rahmani ,2002) and foraging techniques (Dorfman et al,2001) were adopted. Focal animal sampling was used to record the behaviors of Greater Adjutant Stork (Altman, 1974).…”

Section: Introductionmentioning

confidence: 99%

Foraging analysis of Endangered Greater Adsjutant StorkLeptotilus dubiosGemlin in certain habitat of Assam, India

Sharma

2020

Preprint

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The endangered Greater Adjutant Stok Leptotilus dubius Gemlin confined only in some pockets in Assam and Bihar in India and in certain areas of Laos and Cambodia has poorly understood in its foraging activities in its natural habitats. Attempt has been made to address the forage pattern in its natural habitat wetlands in the Kamup district and in a city garbage dump in Guwahati in Assam, India. The various forage methods like walking, visual tactile etc and their relation with the body metrices like beak length, tibia tarsus length and its mass were assessed in terms of foraging habits. Forage actvities were evaluated during the breeding (May to September) and non breeding (October to April) time of the study period of 2012-2017 at different water level of the wetland(s). The foraging range of this stork assessed at an confinement of aerial distance of 15 km from the nesting sites appears as resident non migratory birds by habits. Types of diet composition obtained from the regurgitated food at the ground of the nesting sites were mostly the fish group channa and cyprinids. Profitability index was determined at the captive stork showed in favour of these two groups within the size group of 5 to 15 cm. Larger food item showed lesser profitability index. PCA analysis showed negative foraging correlation with the Prey size greater than 8cm and 15 cm, while the captivity study was conducted Thus the present findings on the foraging assessment of Greater Adjutant might be the baseline information for conservation action plan.

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“…Black-necked Stork Ephippiorhynchus asiaticus is a wetland species found in South Asia (E. a. asiaticus, population estimate absent but thought to be <1,000; Wetlands International 2002) and Australia (E. a. australis, estimated population c. 30,000;Wetlands International 2002). Though thought to be stable globally, in India the species is thought to be declining as a result of habitat loss and deterioration principally due to increased agriculture, and there has been a move to afford greater protection to the species by moving it up from Schedule IV of the Indian Wildlife (Protection) Act to Schedule I (Rahmani 1989, Elliott 1992, Dorfman et al 2001, Wetlands International 2002, A. R. Rahmani verbally, 2002. Previous reviews on the species have lamented the lack of even basic ecological information on the species (Rahmani 1989, Elliott 1992.…”

Section: Introductionmentioning

confidence: 99%

Group size and habitat use by Black-necked Storks Ephippiorhynchus asiaticus in an agriculture-dominated landscape in Uttar Pradesh, India

Sundar

2004

Bird Conservation International

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SummaryGroup size and habitat use of Black-necked Storks Ephippiorhynchus asiaticus were studied over a 30-month period in an unprotected landscape with a mosaic of natural and manmade features in Etawah and Mainpuri districts, Uttar Pradesh, India. Group size was largely one or two and never more than a family of two adults and three young. Group size did not change with season or across habitat types. Black-necked Storks used habitats to different extents across years and seasons. Wetlands were preferred in all seasons and rice-paddies were preferred during the monsoon. The use of irrigation canals was consistent across seasons and was always in proportion to their availability. Irrigation canals and crop-fields, particularly flooded rice-fields, provided some additional habitat to Black-necked Storks, but catered to the population for a very small period of time. While some studies have demonstrated that flooded rice-fields are useful for wintering waterbird species, conversion of natural wetlands to crop-fields will not be advantageous to Black-necked Storks, and these habitats need to be preserved to conserve the species.

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Foraging behaviour and success of Black-necked Storks (Ephippiorhynchus asiaticus) in Australia: implications for management

Cited by 10 publications

References 23 publications

Foraging behaviour and prey size of the painted stork

Foraging behaviour and prey size of the painted stork

Foraging analysis of Endangered Greater Adsjutant StorkLeptotilus dubiosGemlin in certain habitat of Assam, India

Group size and habitat use by Black-necked Storks Ephippiorhynchus asiaticus in an agriculture-dominated landscape in Uttar Pradesh, India

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