Pike (Esox lucius) is a large freshwater species with a wide distribution in Eurasia and North America that has been exploited since prehistoric times as is shown by the skeletal remains found on numerous archaeological sites. The role the species played in the subsistence of inland human settlements can be documented by its proportion within the spectrum of exploited fish and by reconstructing the body lengths of the pike and the amount of meat they represent. Osteometrical data in the literature allow size and, sometimes, meat weight reconstructions on the basis of the measurements of isolated cranial bones, but little attention has been paid thus far to the use of vertebrae for such reconstructions. Using a series of 27 dry skeletons of modern pike, here, we provide regression equations that allow an accurate estimation of the body length and weight of the fish on the basis of each of the first five vertebrae. Analysis of the size variation of the height, width and length of all the vertebral centra along the vertebral column, through the construction of the so-called Global Rachidian Profile, showed that only the length measurements can be of potential use for a rather crude estimation of body length. Finally, a case study is provided, using a large assemblage of Early Neolithic pike vertebrae, to show the potential of the new osteometrical data.
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RBINS Staff Publications 2021
The biogeographical importance of Dalmatia, bordered by the Dinaric Alps and the Adriatic Sea, is evident through the rich biodiversity of this region and its network of protected areas. One of those areas, Krka National Park (NP), supports a wide range of natural habitats, but rapidly increasing tourism puts high pressure on its ecosystems, despite its protected status. Accurate knowledge of species and their distributions within natural places such as Krka is essential to direct and prioritize future conservation efforts. As collecting biodiversity data is time and resource-intensive, alternative ways to obtain this information are needed. One possibility is monitoring based on ecovolunteering. From June to August of 2019, an Operation Wallacea/BIOTA scientific team surveyed a section of Krka NP and its surrounding boundaries, within the vicinity of the village of Puljane, to study its butterfly richness and abundance. Pollard walks and static count surveys were conducted with the help of eco-volunteers, testing the effectiveness of gathering field data through this approach. Overall, 57 butterfly species were found throughout the study, including four new records for Krka NP. Three further new species for the park were detected close to its boundaries and are also expected to occur within its borders. Here, we present an updated butterfly checklist for Krka NP, highlighting the positive impact of eco-volunteering initiatives and the importance of combined research efforts to study and protect the rich biodiversity and ecosystems of protected areas.
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RBINS Staff Publications 2021
