Species, sex, size and male maturity composition of ... - Seaturtle.org
Species, sex, size and male maturity composition of ... - Seaturtle.org
Species, sex, size and male maturity composition of ... - Seaturtle.org
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ELASMOBRANCHS IN KUWAIT, QATAR AND ABU DHABI 15<br />
Mature <strong>male</strong>s (%)<br />
100 (a)<br />
100<br />
(b)<br />
90<br />
90<br />
80<br />
80<br />
70<br />
70<br />
60<br />
60<br />
50<br />
50<br />
40<br />
40<br />
30<br />
30<br />
20<br />
20<br />
10<br />
10<br />
0<br />
0<br />
30 35 40 45 50 55 60 65 70 75 80 85 90 95 50 55 60 65 70 75 80<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
(c)<br />
50 55 60 65 70 75 80<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
(d)<br />
40 45 50 55 60 65 70<br />
L T (cm)<br />
Fig. 5. Male <strong>maturity</strong> ogives for (a) Carcharhinus dussumieri, (b)Loxodon macrorhinus, (c)Rhizoprionodon<br />
acutus <strong>and</strong> (d) Rhizoprionodon oligolinx. The sample <strong>size</strong> (n), total length (L T ) at 50% <strong>maturity</strong> (L T50 )<br />
<strong>and</strong> coefficients for the logistic model Y = x + (z − x)(1 + e −K(L T −L T50 ) ) −1 used to determine L T50 are<br />
(a) n = 730, L T50 = 72·1 cm,K = 0·619, x = 0·5, z = 99·6(r 2 = 0·991); (b) n = 147, L T50 = 64·0 cm,<br />
K = 0·441, x =−3·2, z = 100·2 (r 2 = 0·947); (c) n = 811, L T50 = 61·7 cm,K = 0·714, x = 0·1, z =<br />
99·1 (r 2 = 0·993); (d) n = 92, L T50 = 53·0, K = 18·45, x =−4·7, z = 97·0 (r 2 = 0·990).<br />
those in the same location in 2008 (Mann–Whitney U-test, P
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