Abstract

Morphometric Dynamics of Selected Male Reproductive Organs in Rose-Ringed Parakeets (Psittacula Krameri) in Faisalabad, Pakistan

Authors: Asadullah Rasheed, Sarmad Rehan, Anas Sarwar Qureshi, Urooj Azmat, Muhammad Usman, Razia Kausar, Zaima Umar, Muhammad Umar Sharif, Shoaib Shafqat and Harun Yussuf Ayoub

DOI: http://dx.doi.org/10.71081/cvj/2025.035

Abstract
This project aimed to study the adult male reproductive organs in Psittacula krameri (rose-ringed parakeets) during the breeding and non-breeding seasons (n= 6). Once the reproductive organs were collected, they were fixed and processed by paraffin tissue preparation technique. The testes and vas deferens were carefully collected from each bird to record the weight and dimensions (length, width, diameter and volume), determined with a digital weighing balance and Vernier’s calipers. Data were analyzed using ANOVA to determine significant differences. The results showed maximum mean weights of right (290.63±5.69mg) and left (177.20±6.63mg) testis during the breeding season and decreased weights (56.73±2.48mg) and (51.37±1.40mg) in the non-breeding season, respectively. The lengths of the left and right testes during the breeding season were (9.00±0.57mm) and (6.55±0.28mm) and for the non-breeding season were (6.92±0.12mm) and (6.55±0.28mm), respectively. The width of left and right testes during the breeding season was recorded as (6.50±0.56mm) and (5.49±0.49mm) and during the non-breeding season was (3.94±0.08mm) and (3.41±0.0mm). The mean volume during the breeding season was recorded as (0.32±0.03cm3) and (0.25±0.02cm3) and during non-breeding season as (0.24±0.0 cm3) and (0.06±0.005cm3) for the left and right testes, respectively. The mean length of left and right ductus deferens was (1.41±0.1mm) and (1.21±0.12mm) for the breeding season and (1.40±0.06mm) and (1.00±0.01mm) during the non-breeding season. The microscopic study showed the maximum diameter of seminiferous tubules and the germinal layer thickness (200.09±7.1µm) and (34.31±2.4µm) during the breeding season and minimum values (149.2±10.4µm) and (23.45±0.99µm) during non-breeding season respectively. These stark differences in the values of macroscopic and microscopic parameters suggest the physiological adaptations of rose-ringed parakeets for optimum reproductive efficiency.

Keywords: Rose-ringed parakeet, Breading Season, male reproductive, Testis