IJCRR - 7(14), July, 2015
ABLATION OF SULCUS SPERMATICUS FOR BIRTH CONTROL SURGERY IN MUGGER CROCODILES(CROCODYLUS PALUSTRIS)
Author: Justin William B., G. Dhananjaya Rao, M. Bharathidasan, R. Thirumurugan, S. Simon, R. Jayaprakash, Ravi Sundar George
Objectives: Mugger crocodiles breed twice in a year under captivity resulting in over population; requiring birth control measures. As the testis and vas deferens are intra-abdominal, the efficacy of surgical ablation of sulcus spermaticus that transport the
sperm during copulation, on the dorsal surface of the phallus was assessed.
Methods: Twelve male crocodiles weighing between 140 to 230 kg were immobilized and anaesthetized with a combination of xylazine-ketamine at the dose rate of 1.5 and 20 mg/kg body weight respectively. Under aseptic precautions the phallus was retracted through cloacal slit as the animal was positioned on dorsal recumbency. The mucous membrane guarding the groove and floor were resected to ablate the sulcus spermaticus and the mucous membrane on either side was sutured. After 6 to 8 months randomly 6 crocodiles were immobilized and the phallus was examined, which revealed no signs of regeneration of the groove.
Conclusion: The study revealed that ablation of sulcus spermaticus could be followed as a birth control surgery in male mugger crocodiles without affecting the welfare and breeding behavior.
Keywords: Birth control surgery, Crocodiles, Male, Mugger, Phallus, Sulcus spermaticus, Surgical ablation
Justin William B., G. Dhananjaya Rao, M. Bharathidasan, R. Thirumurugan, S. Simon, R. Jayaprakash, Ravi Sundar George. ABLATION OF SULCUS SPERMATICUS FOR BIRTH CONTROL SURGERY IN MUGGER CROCODILES(CROCODYLUS PALUSTRIS) International Journal of Current Research and Review. 7(14), July, 57-60
1. Alibardi, L., 2010. Regeneration of reptiles and its position among vertebrates. In. Morphological and cellular aspects of tail and limb regeneration in Lizards. A model system with implications for tissue regeneration in mammals. Springer, p1-49.
2. Das, M and Purkayastha, J., 2012. Insight into hemipenial morphology of five species of Hemidactylus Oken, 1817 (Reptilia: Gekkonidae) of Guwahati, Assam, India, Hamadryad. 36(1): 32 – 37.
3. Kelly, D.A., 2013. Penile anatomy and hypotheses of erectile function in the American Alligator (Alligator mississippiensis): Muscular eversion and elastic retraction. The Anat. Rec., 296: 488-494.
4. Lankester, F. and Hernandez, DSJ., 2005. Paraphimosis and amputation in a Nile crocodile (Crocodylus niloticus).J. Zoo Wildl. Med., 36(4):698-701.
5. Shiju, S, William, BJ., Jayaprakash, R.; Kumar, RS. and Thejomoorthy, P, 2012. Evaluation of xylazine-ketamine and xylazine - acepromazine -ketamine for surgical intervention in mugger crocodiles (Crocodylus palustris). Indian J. Field Vet. 7(4): 41- 44.
6. Silva da, A.and Lenin, J., 2010. Mugger crocodile Crocodylus palustris. In: Crocodiles. Manolis, S.C. and C. Stevenson (Eds), 3rd Edn., Staus Survey and Conservation Action Plan, India. P94-98.
7. Whitaker, R. and Whitaker, Z., 1979. Preliminary crocodile survey – Sri Lanka, J. Bombay Nat. Hist. Soc. 76 (1) 66-85. 8. Whitaker, R. and Whitaker, Z., 1984. Reproductive biology of mugger. J. Bombay Nat. Hist. Soc. 81(2) 119-127.
9. Wild Life (Protection) Act 1972, Recognition of Zoo Rules, 1992. Government of India.
10. Ziegler, T., and Olbort, S., 2007. Genital structures and sex identification in Crocodiles. Crocodile Specialist Group Newsletter, 26(3): 16-17.