| Autor: |
T. J. Stewart, C. Erasmus, A. J. Penney, Stephen J. Lamberth, Bruce Q. Mann, S. L. Brouwer, Warwick H. H. Sauer |
| Rok vydání: |
1997 |
| Předmět: |
|
| Zdroj: |
South African Journal of Marine Science. 18:147-163 |
| ISSN: |
0257-7615 |
| DOI: |
10.2989/025776197784161090 |
| Popis: |
The boat-based linefishery in South African waters was investigated between 1994 and 1996. Methods involved a combination of access point and questionnaire surveys to collect catch and effort data, and to assess responses to management measures by the commercial and recreational fishing sectors. Compulsory catch returns submitted from commercial vessels were validated from direct observations. Results revealed substantial errors in compulsory catch returns; where over-reporting was high, it was not possible to quantify these statistically because of the high variance obtained when combining these data with both nil returns and under-reporting. Where over-reporting was negligible, statistical assessment was possible for some key species and areas. These were calculated to be under-reported by an overall factor of 2.87±0.94. The inclusion of the recreational component of the overall catch provides the most comprehensive coverage of that sector to date. The results indicate that increased attention should be... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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