Age determination in fish fish. Johannes Reibisch, working for the Commission of Scientific Investigation of German Seas at Kiel, attempted to use Hoffbauer’s techniques to age plaice ("Plueronectes platessa") but found it difficult to accurately discern annuli. He decided to study a different structure and in 1899 he published the first procedures using otoliths as an aging structure. A fellow scientist also with the German Commission at Kiel, Friedriche Heincke, also frustrated with difficult scale annuli, further studied other structures to age fish. He discovered annuli in the vertebrae, opercula, and pectoral girdle and published his findings in Heicke 1905. The works of Hoffbauer,
¿Which Side Are You On? The album debuted at #82 on the Canadian Albums Chart and at #26 on the "Billboard" 200. ¿Which Side Are You On? ¿Which Side Are You On? is the 17th studio album by singer-songwriter Ani DiFranco, released on January 17, 2012. The title track is a revised version of the 1931 Florence Reece song "Which Side Are You On?" which was popularized by Pete Seeger. Seeger also provides accompanying vocals and banjo on the track. The album so far has a score of 69 out of 100 from Metacritic based on "generally favorable reviews". "The Boston Globe" gave it a