Perhaps this book or chapter can help you with the basics.

https://brill.com/view/book/edcoll/9789004391192/BP000026.xml

Also, here is a good overview of the topic

https://www.sciencedirect.com/science/article/abs/pii/0168159184900595

And finally, I would recommend this book

https://www.wiley.com/en-us/Studying+Captive+Animals%3A+A+Workbook+of+Methods+in+Behaviour%2C+Welfare+and+Ecology-p-9781118629352

Dear Thaint Thaint Myo

You must develope your aim in this study in order to define methodology.

I invite you to see this link : Gidna, A., Yravedra, J., & Domínguez-Rodrigo, M. (2013). A cautionary note on the use of captive carnivores to model wild predator behavior: a comparison of bone modification patterns on long bones by captive and wild lions. Journal of Archaeological Science, 40(4), 1903-1910.

Benson-Amram, S., Gilfillan, G., & McComb, K. (2018). Numerical assessment in the wild: insights from social carnivores. Philosophical Transactions of the Royal Society B: Biological Sciences, 373(1740), 20160508.

or this :

Ferreira, S. C. M., Torelli, F., Klein, S., Fyumagwa, R., Karesh, W. B., Hofer, H., ... & East, M. L. (2019). Evidence of high exposure to Toxoplasma gondii in free-ranging and captive African carnivores. International Journal for Parasitology: Parasites and Wildlife, 8, 111-117.

Good luck,

This may be helpful to you..Jonas, C.S., Timbrell, L.L., Young, F., Petrovan, S.O.,

Bowkett, A.E. and Smith, R.K. (2018) Management of Captive Animals: Global

Evidence for the Effects of Selected Interventions. University of Cambridge,

Cambridge.

Dear Thaint, as Bara pointed out, you must define your research question with more specificity, ones determined, the scientific community can provide much helpful information. Are you more interested in the behavioral aspect during captivity, physical health conditions, conservation interest (reproduction), best practices, architecture, logistics, or all of the above? Also, observation of "small carnivores" is rather broad, many species demand rather specific conditions.

In case you want to asses behaviour, a good thing could be to use QBA (qualitative behavioural assessment) method together with quantitative methods so as to validate them

Is this a comparative, multi-species study, or investigation of a single species? Does zoo habitat enrichment factor into your proposed research? Given the predominant characteristic of small carnivores being primarily nocturnal in their activity patterns and foraging behaviour (with some species exhibiting flexible "cathemeral" activity patterns across the 24-hour cycle), you should arrange for nocturnal observations of the zoo animals. Consider using video monitoring (infra-red cameras); to make use of video data, you would need to have a very clearly defined ethogram in order to quantify elements of the small carnivore behaviour in zoo settings.

Thank you very much for your suggestions and it will support my work a lot.

Best regards,

Thaint

for each animals observations , there are many related articles on a specific animal. you can search and read the related articles from google scholar. its the best way.

Thank you for your suggestions