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Length-Weight Parameters for Squalus acanthias
Length-weight (log a vs b) graph
    [n=19]
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a b Country Locality
Score a b Doubtful? Sex Length (cm) Length
type 		r2 SD b SD log10 a n Country Locality
0.01250 2.619 yes  juvenile 41.0 - 52.0 TL  0.957  0.226   8  Turkey northern Sea of Marmara, 2006-2007 (Nov.-Mar.) 
0.01530 2.757   Mixed 25.2 - 142.7 TL  0.981        Black Sea 
0.01120 2.775   female 27.0 - 70.5 TL  0.821      16  Turkey North Aegean Sea, 1999-00 
0.00595 2.889   female               UK Scotland North East Atlantic, 3rd quarter 
0.00576 2.890   male               UK Scotland North East Atlantic 
0.00410 2.984   Male 25.5 - 97.5 TL  0.982      127  North Sea / 1994-2008 
0.00275 3.050   male     FL          New Zealand QMA3 
0.00270 3.090   unsexed     TL        7  Flemish Cap, NW Atlantic, 1988-2002 (July) 
0.00310 3.106   mixed 27.0 - 70.5 TL  0.963      32  Turkey North Aegean Sea, 1999-00 
0.00310 3.110 yes  juvenile 27.0 - 70.5 TL  0.980  0.160   32  Turkey North Aegean Sea, 2003 (March; July) 
0.00230 3.129   unsexed 24.5 - 115.5 TL  0.982      273  North Sea / 1994-2008 
0.00100 3.153   unsexed 112.0 - 144.0 TL  0.810  0.844   22  Bulgaria Black Sea, 2006-2008 
0.00213 3.163   unsexed 49.4 - 102.0 FL  0.949      535  New Zealand  
0.00230 3.182   male 38.0 - 56.5 TL  0.988      16  Turkey North Aegean Sea, 1999-00 
0.00147 3.220   unsexed     TL          South Africa  
0.00150 3.249   Female 24.5 - 115.5 TL  0.992      108  North Sea / 1994-2008 
0.00139 3.250   female     FL          New Zealand QMA3 
0.00108 3.301   female               UK North East Atlantic, 1st, 2nd & 3rd quarter 
0.00077 3.371   mixed     TL        691  UK Engld Wal not specified (ICES division), 1986 
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Preliminary parameter estimates are provided below, based on your selection of studies and weighted by the scores.
You may want to exclude or give less weight to studies that are far from the regression line in the graph.
Selected studies = 17, geometric mean a = 0.0028, mean b = 3.08, SD log10(W) = 0.0000, SD log10(a) = 0.3551 SD b = 0.1732
Estimate weight for given length: (cm) = (g) 95% range - (g)
Search for more references on length-weight:    Scirus
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Last modified by d.santos 05/08/14