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

3.9. Results - Fry study........................................................................................... 53
3.9.1. Observations ............................................................................................. 53
3.9.2. Overview of catches.................................................................................. 53
3.9.3. Selection of indicator species .................................................................... 57
3.9.4. Individual selected species ........................................................................ 59
3.9.4.1 Fifteen-spined stickleback (Spinachia spinachia) ................................... 59
3.9.4.2 Two-spotted goby (Gobiusculus flavescens).......................................... 61
3.9.4.3 Sand goby (Pomatoschistus minutus)..................................................... 63
3.9.4.4 Eelpout (Zoarces viviparus)................................................................... 65
3.9.4.5 Short-spined sea scorpion (Myoxocephalus scorpius) ............................ 67
3.9.4.6 Longspined bullhead (Taurulus bubalis) ................................................ 69
3.9.4.7 Flounder (Platichthys flesus) ................................................................. 71
3.9.5. Comments on some the remaining species................................................. 73
3.9.6. Statistical comparison of sampling areas. .................................................. 73
3.10. Discussion ..................................................................................................... 79
3.10.1. Evaluation of methods............................................................................. 79
3.10.2. Evaluation of statistics............................................................................. 79
3.10.2.1 Parametric vs. non-parametric ............................................................. 80
3.10.2.2 Univariate or multivariate analysis?..................................................... 86
3.10.2.3 Examples from the actual investigation................................................ 88
3.10.3. Biological evaluation............................................................................... 92
3.10.3.1 Fish study............................................................................................ 92
3.10.3.2 Fry study ............................................................................................. 93
3.10.4. Evaluation and development of the monitoring program.......................... 93
3.10.4.1 Recommendations in relation to parametric univariate analysis............ 93
3.10.4.2 Recommendations in relation to non-parametric multivariate analysis . 95
4. Commercial fishery................................................................................................. 97
4.1. Methods........................................................................................................... 97
4.1.1. Interviews with local commercial fishermen.............................................. 97
4.1.2. Quality assurance ...................................................................................... 98
4.1.3. Review of existing information ................................................................. 98
4.2. Results............................................................................................................. 98
4.2.1. The scope of the fishery ............................................................................ 99
4.2.2. Fishing grounds....................................................................................... 102
4.2.3. Catches recorded in the Danish Directorate for Fisheries logbook
records from 1982 to 2001 ..................................................................... 104
4.2.4. Expectations for the occurrence of commercially important species ........ 106
4.2.5. Comparison between information on catches from the interview and
data from the Directorate of Fisheries from area 38G1. .......................... 107
4.2.6. Reported catches in area 38G1 from 1982 to 2001................................... 109
4.2.7. Estimate of the catch within the wind farm site alone .............................. 110
4.3. Discussion..................................................................................................... 111
5. Conclusion............................................................................................................ 113
5.1. Fish study ...................................................................................................... 113
5.2. Fry Study....................................................................................................... 114
5.3. Commercial fishery ....................................................................................... 114
6. References ............................................................................................................ 115
Appendix 1. Review of the biology of fish species .................................................... 117
Appendix 2. List of research positions (stations), WGS-84........................................ 128
Appendix 3. Levene’s test and Uni-ANOVA analysis of abundance.......................... 129
SEAS. Baseline study – Fish, fry and commercial fishery Dok. nr. 2148-03-001-rev3 2P.doc