HISTOLOGICAL STRUCTURE AND HISTOMORPHOMETRY OF THE BALI DUCK OESOPHAGUS IN STARTER PHASE

Eunike Beallara Hutapea (Mahasiswa Sarjana Pendidikan Dokter Hewan, Fakultas Kedokteran Hewan, Universitas Udayana, Jl. P.B Sudirman, Denpasar, Bali, 80234, Indonesia)
Ni Luh Eka Setiasih (Laboratorium Histologi Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. PB. Sudirman, Sanglah, Denpasar, Bali Indonesia, 80234)
Desak Nyoman Dewi Indira Laksmi (Laboratorium Reproduksi Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. PB. Sudirman, Sanglah, Denpasar, Bali Indonesia, 80234)
Luh Gde Sri Surya Heryani (Laboratorium Anatomi dan Embriologi Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. PB. Sudirman, Denpasar, Bali, 80234, Indonesia)
Ni Nyoman Werdi Susari (Laboratorium Anatomi dan Embriologi Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. PB. Sudirman, Denpasar, Bali, 80234, Indonesia)
Sri Kayati Widyastuti (Laboratorium Penyakit Dalam Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. Raya Sesetan, Gg. Markisa No.6, Denpasar, Bali, Indonesia, 80235)

Buletin Veteriner Udayana
Bul. Vet. Udayana. August 2025 Vol. 17 No. 4

Bali duck (Anas sp.) is a native Indonesian duck breed developed in the Bali and Lombok regions. Bali duck have significant potential as producers of eggs and meat, contributing to the fulfilment of animal protein needs of the Indonesian population. This study was conducted to determine the histological structure and histomorphometry of the oesophagus of bali duck during the starter phase. Samples were taken from ducks aged 1 day, 14 days, 28 days, 42 days, and 56 days. Histological sample observations focused on the layers composing the oesophagus. Parameters used for histomorphometry measurements were the thickness of the oesophageal tunica layers and he results of the research on histological structure are presented in a descriptive qualitative form. The results of the research on histomorphometry are presented in a descriptive quantitative form, analysed using Analysis of Variance (ANOVA) and if the results showed a significant difference, were followed by Duncan’s post-hoc test. The study results indicated that histologically, the bali duck oesophagus consists of the tunica mucosa, tunica submucosa, tunica muscularis, and tunica adventitia. Histomorphometry results showed an increase in the thickness of each layer with increasing age, from 1 day, 14 days, 28 days, 42 days, to 56 days. Further studies in different phase employing special staining techniques are required to allow for more detailed identification.