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| Moore, Claire; Lynch, Deirdre; Clarke, Maurice; Officer, Rick; Mills, Jane; Dufour, Jean-louis; Brophy, Deirdre. |
| Sprat is a pelagic species of increasing commercial interest in European waters, yet little is known about its biology or the drivers of its population fluctuations. As a result, the species is currently without an analytical assessment or forecast across much of the North East Atlantic. The objectives of this study were to: verify otolithbased age estimation of sprat; assess the precision, bias and reproducibility of these age estimates; and, determine the age structure of sprat within one North East Atlantic management unit (Celtic Seas ecoregion). Samples were collected over three years (2011, 2013 & 2014) from both commercial catches and scientific surveys. Counts of daily increments in otoliths were used to establish when the first annulus was... |
| Tipo: Text |
Palavras-chave: Sprat; Age verification; Otolith; Marginal increment analysis; Age structure. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59692/62883.pdf |
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| Guillaud, Emilie; Elleboode, Romain; Mahe, Kelig; Bearez, Philippe. |
| The fish remains sampled from archaeological sites are generally the result of human food refuse; therefore, the study of retrieved fish scales may provide reliable information on the season of capture and on paleoclimate and paleoenvironmental changes. Among Western European freshwater fishes, the grayling, Thymallus thymallus¸ has the most easily recognizable scales and is a commonly recovered species from Paleolithic contexts. This study, therefore, is based on the growth pattern analysis of modern and archaeological scales from grayling specimens. The modern specimens were collected monthly in France (n = 22), Switzerland (n = 16), Finland (n = 20) and Sweden (n = 10). Scale growth patterns were measured using numerical analysis to a high accuracy. The... |
| Tipo: Text |
Palavras-chave: France; Le Taillis des Coteaux; Marginal increment analysis; Scales; Scalimetry; Sclerochronology; Thymallus thymallus; Upper Paleolithic. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00379/48992/49436.pdf |
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