We have been publishing an Opinion in Trends in Ecology and Evolution (MIlls et al. 2015) about the intricate solutions to archiving and public availability of data from long-term studies to find a good balance between the interest of the research group (who wishes to continue to work with the unique long-term data even after publication) and the research society (who wishes free access).
Summary: "The recent trend for journals to require open access to primary data included in publications has been embraced by many biologists, but has caused apprehension amongst researchers engaged in long-term ecological and evolutionary studies. A worldwide survey of 73 principal investigators (Pls) with long-term studies revealed positive attitudes towards sharing data with the agreement or involvement of the PI, and 93% of PIs have historically shared data. Only 8% were in favor of uncontrolled, open access to primary data while 63% expressed serious concern. We present here their viewpoint on an issue that can have non-trivial scientific consequences. We discuss potential costs of public data archiving and provide possible solutions to meet the needs of journals and researchers."