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Seasonality only works in certain parts of the year: the reconstruction of fishing seasons through otolith analysis
Van Neer, W.; Ervynck, A.; Bolle, L.J.; Millner, R.S. (2004). Seasonality only works in certain parts of the year: the reconstruction of fishing seasons through otolith analysis. Int. J. Osteoarchaeol. 14(6): 457-474
In: International Journal of Osteoarchaeology. Wiley Interscience: Chichester. ISSN 1047-482X; e-ISSN 1099-1212
Peer reviewed article  

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Trefwoorden
    Periodicity > Seasonality
    Population functions > Growth
    Melanogrammus aeglefinus (Linnaeus, 1758) [WoRMS]; Pleuronectes platessa Linnaeus, 1758 [WoRMS]
    Marien

Auteurs  Top 
  • Van Neer, W.
  • Ervynck, A.
  • Bolle, L.J.
  • Millner, R.S.

Abstract
    Seasonality estimations using incremental data usually suffer from small sample sizes and from the lack of comparison with sufficiently large modern samples. The present contribution reports on incremental studies carried out on large assemblages of plaice (Pleuronectes platessa) and haddock (Melanogrammus aeglefinus) from a late medieval fishing village (Raversijde, Belgium) on the North Sea coast. In an attempt to refine previous seasonality estimates made for this site, and to expand conclusions concerning general methodology, extensive monthly samples of modern otoliths of these species, caught within the North Sea, have also been investigated. The modern material shows that the timing of the seasonal changes in the edge type (hyaline or opaque) of the otoliths is extremely variable and that it is dependent on the fishing ground, the year considered, and the age of the fish. It also appears that the increase of the marginal increment thickness is highly variable, to such an extent that the thickness of the last increment of a single otolith is mostly useless for seasonality estimation. Where large archaeological otolith assemblages can be studied, preferably from single depositional events, seasonality determination becomes possible on the condition, however, that the archaeological assemblage corresponds to fish that were captured during their period of fast growth. The growth ring study on the otoliths from Raversijde shows that plaice fishing took place in spring and that it was preceded by a haddock fishing season, probably in late winter/early spring.

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