The Effect of a Marine Protected Area and the Exclusion of Beach Seines on Coral Reef Fisheries.
Fish landing data from adjacent the Mombasa Marine National Park (MNP) and seven sites in Diani (Kenya) were studied from 1995 to 1999 to determine the influence of the park and restrictions of beach seines on fisheries catches. Data were based on sampling for 10 days per month, where fish were separated into the major families, the wet weights estimated by a spring balance, and data analysed based on gear, numbers of fishers, and the area from which the fish were caught. In the case of the Mombasa marine reserve, the beach seine exclusion was done nearly simultaneously with a reduction in the size of the Marine Protected Area. These two factors combined resulted in increased fish catches on a per area and fisher basis. It was, however, difficult to distinguish the effects of the two changes, but the initial pulse (< 6 months) in catch is largely due to opening a previously unfished area to fishing. After the large initial increase in the catch there was a decline over time, but catches were still above those before the management changes. In Diani the two landings that restricted beach seines for over 20 years had the highest per fisher catches, being 13% greater than sites with beach seines, while those that still adopt beach seines had the lowest catches (ANOVA, F = 4.5). Data shows a progressive decline in per man catches in all the sites irrespective of the management in place or the exclusion of the beach seines. Nevertheless, the marine reserve had the highest catch per area (5.5 kg/ha) despite having the highest number of fishers per area basis (7~c2 fishers/ha/month). There were no strong seasonal patterns from time series plots for the catch statistics. We show that parrotfishes (Scaridae), rabbitfishes (Siganidae), scavengers (Lethrinidae and Lutjanidae) and octopuses (Octopo-didae)are the major groups dominating these fisheries.
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Report Section biblioteca |
| Language: | English |
| Published: |
African Studies Centre
2003
|
| Subjects: | Landing statistics, Fishery management, Fishery data, Fishery statistics, Protected resources, Beach seines, |
| Online Access: | http://hdl.handle.net/1834/8997 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Fish landing data from adjacent the Mombasa Marine National Park (MNP) and seven sites in Diani (Kenya) were studied from 1995 to 1999 to determine the influence of the park and restrictions of beach seines on fisheries catches. Data were based on sampling for 10 days per month, where fish were separated into the major families, the wet weights estimated by a spring balance, and data analysed based on gear, numbers of fishers, and the area from which the fish were caught. In the case of the Mombasa marine reserve, the beach seine exclusion was done nearly simultaneously with a reduction in the size of the Marine Protected Area. These two factors combined resulted in increased fish catches on a per area and fisher basis. It was, however, difficult to distinguish the effects of the two changes, but the initial pulse (< 6 months) in catch is largely due to opening a previously unfished area to fishing. After the large initial increase in the catch there was a decline over time, but catches were still above those before the management changes. In Diani the two landings that restricted beach seines for over 20 years had the highest per fisher catches, being 13% greater than sites with beach seines, while those that still adopt beach seines had the lowest catches (ANOVA, F = 4.5). Data shows a progressive decline in per man catches in all the sites irrespective of the management in place or the exclusion of the beach seines. Nevertheless, the marine reserve had the highest catch per area (5.5 kg/ha) despite having the highest number of fishers per area basis (7~c2 fishers/ha/month). There were no strong seasonal patterns from time series plots for the catch statistics. We show that parrotfishes (Scaridae), rabbitfishes (Siganidae), scavengers (Lethrinidae and Lutjanidae) and octopuses (Octopo-didae)are the major groups dominating these fisheries. |
|---|