I am currently aiming to find any statistical difference between site fidelity for four shark species between sex and sample site. This uses a mark-recapture method and thus the data is heavily zero inflated for sharks that were not recaptured. Since the values for site fidelity are not integers I am unable to fit a zero-inflated Poisson model using the "pscl" package. Are there any other options in terms of GLM model families that I could use, or are there other statistical tests that I could potentially use to find any differences between the groups?

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