Holy mackerel! Medieval harbour cats from Iran and Oman had differential access to marine fish

Being opportunistic animals, cats have adjusted to anthropogenic environments and enriched their food repertoire with meat from large terrestrial animals and fish. Although cats are skilled hunters, anthropogenic food comprises an important part of their diet when living in an urban centre, and, thus, their dietary reconstruction can provide information on regional food availabilities as well as their interactions with humans. With the aim to reconstruct the diet of cats from two medieval harbours in the Arabian Gulf and the Gulf of Oman (Siraf in Iran and Qalhât in Oman), we conducted carbon and nitrogen stable isotope ratio analysis on 28 cats and more than 100 associated faunal samples. Tens of cat remains have been discovered at both sites, which have historical and archaeological evidence for a long tradition in seafaring and sea fishing. The isotopic results reveal a high marine protein-based diet for the cats from Qalhât and a mixed marine-terrestrial (C4) diet for the cats from Siraf. Cats at both sites were most likely scavenging on both human food scraps and refuse related to fishing activities, with differences in the two areas most likely associated with the local availability of marine resources. By shedding light on the dietary habits of cats from two medieval harbours in the Arabian Gulf and the Gulf of Oman, our study illustrates the potential of stable isotope analysis in reconstructing human-cat interactions in the past. Keywords: carbon; nitrogen; cat; diet; Qalhât; Siraf.

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