Andrew K.G. Jones

Stable Isotope Evidence for Late Medieval (14th–15th C) Origins of the Eastern Baltic Cod (Gadus morhua) Fishery

Although recent historical ecology studies have extended quantitative knowledge of eastern Baltic cod (Gadus morhua) exploitation back as far as the 16th century, the historical origin of the modern fishery remains obscure. Widespread archaeological evidence for cod consumption around the eastern Baltic littoral emerges around the 13th century, three centuries before systematic documentation, but it is not clear whether this represents (1) development of a substantial eastern Baltic cod fishery, or (2) large-scale importation of preserved cod from elsewhere. To distinguish between these hypotheses we use stable carbon and nitrogen isotope analysis to determine likely catch regions of 74 cod vertebrae and cleithra from 19 Baltic archaeological sites dated from the 8th to the 16th centuries. δ13C and δ15N signatures for six possible catch regions were established using a larger sample of archaeological cod cranial bones (n = 249). The data strongly support the second hypothesis, revealing widespread importation of cod during the 13th to 14th centuries, most of it probably from Arctic Norway. By the 15th century, however, eastern Baltic cod dominate within our sample, indicating the development of a substantial late medieval fishery. Potential human impact on cod stocks in the eastern Baltic must thus be taken into account for at least the last 600 years.

Carbon and nitrogen stable isotope values in freshwater, brackish and marine fish bone collagen from Mesolithic and Neolithic sites in central and northern Europe

The aim of this research is to examine the isotopic characterisation of archaeological fish species as it relates to freshwater, brackish and marine environments, trophic level and migration patterns, and to determine intraspecies variation within and between fish populations in different locations within central and northern Europe. Carbon and nitrogen stable isotope analysis was undertaken on collagen extracted from 72 fish bone samples from eight Mesolithic and Neolithic archaeological sites in this region. Thirty-six (50%) of the specimens analysed produced results with acceptable carbon to nitrogen atomic ratios (2·9–3·6). The fish remains encompassed a wide spectrum of freshwater, brackish and marine taxa (n = 12), which were reflected in the δ13C values (−24·5 to −7·8‰). The freshwater/brackish fish (pike, Esox lucius; perch, Perca fluviatilis; zander, Sander lucioperca) had δ13C values that ranged from −24·2 to −19·3‰, whereas the brackish/marine fish (spurdog, Squalus acanthias; flatfish, Pleuronectidae; codfish, Gadidae; garfish, Belone belone; mackerel, Scomber scombrus) ranged from −14·9 to −9·4‰. Salmonidae, an anadromous taxon, and eel (Anguilla anguilla), a catadromous species, had carbon isotope values consistent with marine origin, and no evidence of freshwater residency (−12·7 to −11·7‰). The δ15N values had a range of 6·2‰ (6·5–12·7‰) indicating that these fish were on average feeding at 1·7 trophic levels higher than their producers in these diverse aquatic environments. These results serve as an important ecological baseline for the future isotopic reconstruction of the diet of human populations dating to the late Mesolithic and early Neolithic of the region.

Late Upper Palaeolithic fishing in the Fucino Basin, central Italy, a detailed analysis of the remains from Grotta di Pozzo

Abstract Fish remains have been recovered from seven Upper Palaeolithic sites in the Fucino Basin, central Italy. Analyses of fish remains from one of these sites, Grotta di Pozzo, are presented here and discussed in relation to previous research on fish remains from other Fucino Basin sites. It is recognised that in previous studies little consideration has been given to identifying, or confirming accumulation agent(s) for fish remains. Three potential non-human accumulation agents are identified and considered in detail, but these do not explain the element representation patterns for fish remains recovered at Grotta di Pozzo. As such, it is likely that the fish bones from this site do represent the remains of human activity. Given this interpretation, the assemblage characteristics suggest that Grotta di Pozzo represents a site used for exploitation and processing of fish for transportation for later consumption, most likely on a seasonal basis. Further work on the fish from other Fucino Basin sites is needed to reliably rule out non-human deposition and increase understanding of fishing strategies in the Fucino Basin during the late Glacial period.

Turf roofs and urban archaeological build-up

Abstract Studies of turves used to line the thatched roof of an old farm building in north-west England showed that they might have been a major source of mineral particles and plant and insect remains in some archaeological deposits. Conversely, it might be possible to recognise the remains of turf roofs on occupation sites from characteristic elements of the biota. Analysis of a sample of the accumulation on the floor of the building prompts reconsideration of the nature of ‘indoor’ and ‘outdoor’ insect assemblages.

Deep-sea fishing in the Iron Age? New evidence from Broxmouth hillfort, South–east Scotland

Abstract Rescue excavations carried out during the 1970s at the Iron Age hillfort of Broxmouth in East Lothian produced a small assemblage of fish bone. Despite some uncertainties surrounding the recovery of this material, recent analysis has produced highly unusual results. In particular, the presence of large specimens of ling and other species raises the possibility that the Broxmouth community was, at least periodically, engaged in deep-sea fishing. This suggestion is at variance with present understandings of Iron Age fishing strategies which generally envisage more expedient practices, such as line fishing from the shore. Indeed, it has even been suggested that the consumption of fish was avoided altogether in Iron Age Britain, for religious or cosmological reasons. The composition of the Broxmouth assemblage thus has potentially important implications for our understanding of Iron Age marine exploitation.