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The great auk was once abundant and distributed across the North Atlantic. It is now extinct, having been heavily exploited for its eggs, meat, and feathers. We investigated the impact of human hunting on its demise by integrating genetic data, GPS-based ocean current data, and analyses of population viability. We sequenced complete mitochondrial genomes of 41 individuals from across the species' geographic range and reconstructed population structure and population dynamics throughout the Holocene. Taken together, our data do not provide any evidence that great auks were at risk of extinction prior to the onset of intensive human hunting in the early 16th century. In addition, our population viability analyses reveal that even if the great auk had not been under threat by environmental change, human hunting alone could have been sufficient to cause its extinction. Our results emphasise the vulnerability of even abundant and widespread species to intense and localised exploitation.

A total of 477 bones of the great auk (Pinguinus impennis) from 53 localities and 55 periods in Norway are studied. All but two, are archaeological sites from the Holocene, mainly from 6000–2000 cal years bp. The two non‐anthropogenic sites date to the Ice Age: probably 36,000–34,500 and 14,690–12,890 years bp. The bones are mainly unburned and well preserved but fractured. Except for the open‐air sites in northern Norway, the bones are mainly from rock‐shelters and caves. In combining archive data, chronological information, and morphometrical studies, we suggest the great auk disappeared from the most southern part of Norway (and Sweden and Denmark) prior to 4000 years bp: a decline in distribution 2000 years ago: It became absent from the Norwegian coast 1000 years ago. Data suggest that it was distributed on the coast and in the fjord systems in winter and early spring. The presence of bones of juveniles/subadults indicates that it was also distributed in northern Norway in the autumn. To evaluate possible size differences, in time and space, nine bone elements have been measured according to standard recommendations. Multiple imputation was used to handle missing data before any statistical analysis. Analyses indicate that bones from Nordland are larger than from the rest of the country, while bones from the northernmost sites are smaller. At some localities, size differences, especially in total length of the bones, are found. It has not been verified if this is due to individual variation or sexual differences. The great auk became extinct in the 19th century. The study supports the theory that human predation at breeding sites was the main cause of its extinction. [ABSTRACT FROM AUTHOR]

Here, we present and discuss results from geo‐archaeological and palaeo‐zoological investigations at the Palaeolithic site Pymva Shor, in the Russian Arctic. As many as 3324 vertebrate fauna remains were recovered during two excavations. This includes bones of mammals, birds and fish. Radiocarbon dates were obtained from 26 specimens. The results show ages in the range 30–3 cal. ka BP. Hare and reindeer are the best represented amongst the identified mammalian species, whilst ptarmigan and various wader species dominate the avian bones. The Pleistocene assemblage includes herbivorous herd animals such as horse, bison and musk ox. These species are typical of the treeless tundra‐steppe landscape that existed during the Lateglacial. Of particular interest is a cave lion specimen that has been radiocarbon dated to approximately 15.5 cal. ka BP. According to our knowledge, this is one of the latest dated examples of this species in Eurasia. The faunal composition in the Holocene assemblage is strikingly different and includes distinct forest taxa such as beaver and pine marten. The avifauna also supports a forested environment with the presence of black grouse. A few stone artefacts were found within the strata, and have been radiocarbon dated to 16–15 cal. ka BP, suggesting that there were humans in the Pymva Shore area at that time. We identified impact notches and cut marks on some radiocarbon‐dated reindeer and bison bones, showing that humans were present twice during the Younger Dryas period. A fourth occupation phase is identified during the mid‐Holocene (6–5 cal. ka BP). We also investigated river terraces and obtained a series of luminescence dates. These have been used to reconstruct the geological history and the relationship to the find‐bearing strata. [ABSTRACT FROM AUTHOR]

Background: Red deer (Cervus elaphus) have been an important human resource for millennia, experiencing intensive human influence through habitat alterations, hunting and translocation of animals. In this study we investigate a time series of ancient and contemporary DNA from Norwegian red deer spanning about 7,000 years. Our main aim was to investigate how increasing agricultural land use, hunting pressure and possibly human mediated translocation of animals have affected the genetic diversity on a long-term scale. Results: We obtained mtDNA (D-loop) sequences from 73 ancient specimens. These show higher genetic diversity in ancient compared to extant samples, with the highest diversity preceding the onset of agricultural intensification in the Early Iron Age. Using standard diversity indices, Bayesian skyline plot and approximate Bayesian computation, we detected a population reduction which was more prolonged than, but not as severe as, historic documents indicate. There are signs of substantial changes in haplotype frequencies primarily due to loss of haplotypes through genetic drift. There is no indication of human mediated translocations into the Norwegian population. All the Norwegian sequences show a western European origin, from which the Norwegian lineage divergedapproximately 15,000 years ago. Conclusions: Our results provide direct insight into the effects of increasing habitat fragmentation and human hunting pressure on genetic diversity and structure of red deer populations. They also shed light on the northward post-glacial colonisation process of red deer in Europe and suggest increased precision in inferring past demographic events when including both ancient and contemporary DNA. [ABSTRACT FROM AUTHOR]

In artiodactyles and perissodactyles the interior of the costal cartilages ossify, forming a spongy, osseous tissue. Recently, it has been discovered that such ossifications frequently display visible lines perpendicular to the curvature of the ossification. Such lines are not rare, and often several lines along the same costal cartilage are observed. Macerated ossified costal cartilages frequently, but not always, split into short, bony stabs with straight, cutoff ends, sometimes retaining organic matter encircled within a bony periphery. In archaeological materials such bony stabs are occasionally observed, and are just denoted "costal cartilages" if recognized. The cause of these structures is not clear. Some may be regarded as transverse splits of the ossifications along a weakness zone, but in other cases the cause is obviously a fracture with more or less extensive callus formation. The smooth surfaces are typical and cannot be confused with a secondary fracture, which occur after deposition or maceration. The smooth ends of a healed fracture always display a thin layer of compact tissue, while a secondary fracture is irregular and displays the spongy tissue. Thus, they may be considered as healed micro or macro fractures, where fusion of the fractured ends had occurred along the periphery of the ossification. In other cases, however, healing may involve dislocation prior to the healing process, extensive callus formation, lipping or formation of pseudoarthroses. How such an injury affected the animal is not generally known. However, in the cases of dislocation and extensive bony reaction to the fracture, it is highly probable that the wellbeing of the animal was influenced by the injury. [ABSTRACT FROM AUTHOR]