How does the marking of definite and indefinite objects work in Alaskan Yupik?

In Alaskan Yupik, the distinction between definite and indefinite objects is marked through case usage and verbal agreement:1

• Indefinite Objects: These are marked using an adverbial case, such as the singular suffix -mek. In this construction, the subject is in the absolutive case (similar to a nominative), and the verb does not carry a suffix referring to the object. For example: arnaq neq-mek ner’uq ("the woman is eating (a) fish").1
• Definite Objects: These are marked by placing the object in the absolutive case. In this construction, the subject is placed in the relative case (which also functions as a genitive), and the verb includes a suffix that refers to both the subject and the object. For example: arna-m neqa nera-a ("the woman is eating the fish"), where nera-a indicates "she is eating it".1