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1 June 2013 Parent Recognition in Chicks of the Ground-Nesting, Nidifugous Saunders's Gull Saundersilarus saundersi
Jongmin Yoon, Eun-Jin Joo, Hyun-Joo Yoon, Hyon-Sook Park, Shi-Ryong Park
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Abstract

In birds, offspring-parent interactions play an essential role in facilitating offspring survival at nest-leaving. In contrast to nidicolous nestlings, nidifugous chicks are expected to hatch in ground nests, leave the nest soon after hatching, and presumably exhibit precise parent-offspring recognition during this time. Yet, some studies document variation in nidifugous behavior and offspring-parent recognition of semi-precocial chicks during the nest-leaving stage in the family Laridae. We examine patterns in nest-leaving age, mobile capacity, and parent recognition in wild and captive chicks of the Saunders's Gull Saundersilarus saundersi that is one of ground nesting and colonially breeding species. Our results indicated that the development of locomotor activity in nidifugous chicks coincided with the nestleaving age. Soliciting behavior of experimental chicks increased with age, but they strongly discriminated vocalizations of pseudo-parents against unfamiliar adults only at the early stage of nest-leaving. We suggest that parent recognition by chicks during this short period may play a key role in facilitating their own survival while moving to a new environment with their parents after leaving the nest. More studies using a comparative approach are needed to understand how nesting ecology, nest-leaving behavior, and parent-offspring interaction are interconnected in the members of the family Laridae.

Jongmin Yoon, Eun-Jin Joo, Hyun-Joo Yoon, Hyon-Sook Park, and Shi-Ryong Park "Parent Recognition in Chicks of the Ground-Nesting, Nidifugous Saunders's Gull Saundersilarus saundersi," Acta Ornithologica 48(2), 245-252, (1 June 2013). https://doi.org/10.3161/000164513X678883
Received: 1 October 2012; Accepted: 1 December 2013; Published: 1 June 2013
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KEYWORDS
locomotor activity
nest-leaving
nidifugous
parent-offspring recognition
Saunders's Gull
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