Effectiveness of alternative organic solvents in field preservation of whole barnacles for PCR analyses

There are few reports of non-cryogenic preservation methods for marine invertebrates, so potable alcohol and acetone-based nail varnish remover (NVR) are for the first time evaluated against absolute ethanol as short-term preservatives of whole barnacles. Performance of ethanol and NVR-preserved material was comparable, but potable alcohol was significantly worse. These results are of practical importance for fieldwork in remote areas where laboratory chemicals are unattainable but potable alcohol or NVR are locally available. Of these, acetone-based NVR would be the solvent of preference.

Preservation challenges in the digital age

The digital preservation field is evolving rapidly. Focal areas are changing and best practices are still under debate. Preservation efforts must address not just preservation of the technologies of the past, but also those of the future. The rapidly increasing volume of data requiring preservation makes other digital preservation challenges inherently larger and more complex. The shorter lifespan of digital materials also makes the need for timely and effective preservation action more urgent. This article describes what the author sees as the current major challenges in digital preservation, and covers a range of technical, administrative, legal and logistical aspects.