Changes in age and maturity of anadromous whitefish (Coregonus lavaretus) in the northern Baltic Sea from 1998 to 2014

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Table A.5

Age-specific median (Md) weight (g) of anadromous male and female whitefish in two class periods (1996–2002; 2003–2009) in the Gulf of Bothnia.

Sex	Age	Period 1996–2002		Period 2003–2009		K-S

		N	Md (q1–q3)	N	Md(q1–q3)	P
Male	3	185	292 (250–346)	589	338 (287–392)	<0.001
	4	1415	382 (321–473)	1781	417 (354–516)	<0.001
	5	1358	440 (359–536)	1051	412 (348–520)	<0.001
	6	534	434 (351–552)	283	391 (328–466)	<0.001
Female	3	153	284 (231-321)	438	335 (287–372)	<0.001
	4	821	362 (309–427)	1183	391 (334–495)	<0.001
	5	1089	451 (359–617)	908	428 (352–601)	0.025
	6	603	507 (392–715)	298	413 (347–558)	<0.001

Whitefish captured by trap and gill nets in the third-sixth sea year are included. Differences in age-specific weights between periods were tested using the Kolmogorov-Smirnov test (K-S). Quartiles = q1; q3.

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