Abstract
The avian hippocampus showing neuronal fluctuations in response to seasonal breeding has limited information in birds. Here an attempt was made to investigate the inter-regional variations primarily in the dendritic thickness and spine density of pyramidal neurons in hippocampal complex in male Ploceus philippinus during the breeding period. The results showed significant inter-laminar differences with increased parameters in Parahippocampal Area (APH) thus implying more neuronal networking of APH suggesting its possible role in various learning, sexual, social and nesting behavior.



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Acknowledgments
This research work is supported by UGC Fellowship No. F.4-1/2006 (BSR)/7-16/2007 (BSR) [Order No. 05/R/867/2011] awarded to Parul Gaur. The authors thank the Head, Department of Zoology, University of Allahabad, Allahabad for providing essential facilities for the present investigation.
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Gaur, P., Srivastava, U.C. Inter-regional Variations in Pyramidal Neurons of Hippocampus in Breeding Male Baya Weaver Bird (Ploceus philippinus). Natl. Acad. Sci. Lett. 39, 427–429 (2016). https://doi.org/10.1007/s40009-016-0494-5
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DOI: https://doi.org/10.1007/s40009-016-0494-5