Baseline study Fish, fry and commercial fishery Nysted Offshore ...

Bio/consult as Page 41
Number
Number
15
10
5
0
15
10
5
Short-spined sea scorpion
Wind farm area Reference area
May May
June June
0
0 10 20 30 40 50
Total length (cm)
SEAS. Baseline study – Fish, fry and commercial fishery Dok. nr. 2148-03-001-rev3 2P.doc
Gill net
Fyke net
0 10 20 30 40 50
Total length (cm)
Figure 3.8.14. Length distribution of short-spined sea scorpions in the wind farm area and reference
area in May and June.
Most of the individuals caught were sexually differentiated and probably in the process
of regenerating their gonads, because only five had spent recently.
Længde
(cm)
K. F.
Wind farm area
Gonadevægt (g)
% Gonadevægt
Gonadeindeks N mean mean mean stdv mean stdv N mean mean mean stdv mean stdv
May Juv. Juvenile gonads 7 16,6 1,50 ,0 ,0 ,0 ,00 11 17,0 1,51 ,0 ,0 ,0 ,00
Male sexual diff. 12 17,1 1,40 ,4 ,4 ,6 ,64 8 17,7 1,52 ,3 ,5 ,3 ,33
Spent
1 18,2 1,53 ,1 ,1
Female sexual diff. 14 20,4 1,43 1,5 1,2 1,1 ,83 8 19,8 1,47 1,1 ,7 1,0 ,49
intermediary 9 19,8 1,50 1,5 ,6 1,2 ,36 6 21,8 1,43 2,2 1,1 1,4 ,33
Spent
2 21,1 1,42 1,6 ,4 1,2 ,35 7 20,7 1,63 ,7 ,7 ,5 ,53
June Male sexual diff. 7 18,0 1,40 ,2 ,1 ,2 ,12 1 16,8 1,45 ,2 ,3
Spent
2 17,5 ,85 ,2 ,1 ,3 ,01 5 17,8 1,38 ,1 ,0 ,2 ,04
Female sexual diff. 7 16,9 1,33 ,6 ,4 ,8 ,27 4 19,4 1,40 ,9 ,7 ,8 ,42
Spent
2 18,4 1,26 ,4 ,4 ,4 ,40 3 19,1 1,50 ,7 ,6 ,6 ,42
Længde
(cm)
K. F.
Reference area
Gonadevægt (g)
% Gonadevægt
Table 3.8.9. Average of length, condition factor, weight and percentage of gonads as a function of
the gonad index for short-spined sea scorpion.