Evidence of Considerable Shifts in Catch Composition in the Artisanal Spiny Lobster Fishery in Kenya
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Study Areas
2.2. Sample Collection
2.3. Data Analysis
2.4. Limitations of This Study
3. Results
3.1. Species Distribution
3.2. Catch Composition
3.3. Size and Sex Composition
4. Discussion
4.1. Species Distribution
4.2. Catch Composition
4.3. Size Composition
5. Conclusions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Species | Shimoni | Msambweni | Kilifi | Mambrui | Kipini | Lamu |
---|---|---|---|---|---|---|
Panulirus ornatus | x | x | x | x | x | x |
Panulirus homarus | x | x | x | x | x | x |
Panulirus longipes | x | x | x | x | x | x |
Panulirus versicolor | x | x | x | x | ||
Panulirus penicillatus | x | x | x |
Shimoni | Msambweni | Kilifi | Mambrui | Kipini | Lamu | All | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Species | M | F | M | F | M | F | M | F | M | F | M | F | ||
Panulirus ornatus | N | 124 | 79 | 27 | 20 | 18 | 13 | 48 | 37 | 50 | 61 | 215 | 195 | 887 |
Mean (CL) ± SD | 86 ± 31 | 87 ± 28 | 69 ± 11 | 66 ± 17 | 84 ± 18 | 79 ± 21 | 69 ± 16 | 67 ± 15 | 95 ± 11 | 94 ± 10 | 82 ± 15 | 87 ± 17 | 82 ± 22 | |
Min | 55 | 50 | 53 | 53 | 61 | 53 | 42 | 45 | 70 | 79 | 60 | 54 | 42 | |
Max | 155 | 140 | 90 | 125 | 120 | 112 | 116 | 106 | 108 | 127 | 114 | 127 | 155 | |
Panulirus homarus | N | 4 | 3 | 1 | 1 | 4 | 2 | 111 | 129 | 213 | 232 | 89 | 77 | 866 |
Mean (CL) ± SD | 72 ± 9 | 70 ± 11 | 71 ± 7 | 64 ± 7 | 69 ± 12 | 62 ± 10 | 74 ± 14 | 70 ± 11 | 73 ± 10 | 68 ± 9 | 69 ± 12 | |||
Min | 61 | 59 | 68 | 57 | 65 | 60 | 45 | 44 | 49 | 49 | 67 | 50 | 44 | |
Max | 82 | 80 | 80 | 69 | 97 | 86 | 100 | 99 | 103 | 93 | 103 | |||
Panulirus longipes | N | 143 | 170 | 79 | 73 | 33 | 29 | 9 | 11 | 42 | 18 | 75 | 65 | 747 |
Mean (CL) ± SD | 72 ± 11 | 67 ± 9 | 70 ± 10 | 67 ± 8 | 73 ± 9 | 67 ± 12 | 57 ± 7 | 59 ± 6 | 77 ± 9 | 72 ± 10 | 76 ± 11 | 68 ± 11 | 70 ± 11 | |
Min | 45 | 48 | 54 | 50 | 55 | 48 | 45 | 50 | 55 | 51 | 45 | 50 | 45 | |
Max | 97 | 98 | 97 | 89 | 93 | 81 | 68 | 67 | 95 | 87 | 95 | 87 | 97 |
P. ornatus | Kruskal–Wallis Test | P. longipes | Kruskal–Wallis Test | P. homarus | Kruskal–Wallis Test | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
H | Degree of Freedom | p Value | H | Degree of Freedom | p Value | H | Degree of Freedom | p Value | |||
Site | 89.791 | 5 | <0.001 | Site | 60.357 | 5 | <0.001 | 35.937 | 4 | <0.001 | |
Dunn’s post hoc test | Dunn’s post hoc test | Dunn’s post hoc test | |||||||||
Peer-to-peer comparison | Test static | Standard error | p value | Peer-to-peer comparison | Test static | Standard error | p value | Peer-to-peer comparison | Test static | Standard error | p value |
Mambrui vs. Msambweni | −2.409 | 25.918 | 0.926 | Mambrui vs. Msambweni | −177.724 | 42.934 | <0.001 | Mambrui vs. Kilifi | 57.844 | 67.464 | 0.391 |
Mambrui vs. Kalifi | 93.692 | 29.636 | 0.002 | Mambrui vs. Shimoni | −192.952 | 41.929 | <0.001 | Mambrui vs. Lamu | 74.679 | 16.477 | <0.001 |
Mambrui vs. Shimoni | 102.079 | 19.437 | <0.001 | Mambrui vs. Kilifi | 227.731 | 51.687 | <0.001 | Mambrui vs. Kipini | 91.055 | 17.132 | <0.001 |
Mambrui vs. Lamu | 116.511 | 19.216 | <0.001 | Mambrui vs. Lamu | 258.016 | 43.450 | <0.001 | Mambrui vs. Shimoni | 94.903 | 62.586 | 0.129 |
Mambrui vs. Kipini | 195.918 | 24.286 | <0.001 | Mambrui vs. Kipini | 306.742 | 46.531 | <0.001 | Kilifi vs. Lamu | −16.835 | 67.830 | 0.804 |
Msambweni vs. Kilifi | 91.283 | 33.043 | 0.006 | Msambweni vs. Shimoni | −15.227 | 18.805 | 0.418 | Kilifi vs. Kipini | −33.211 | 67.992 | 0.625 |
Msambweni vs. Shimoni | −99.670 | 24.317 | <0.001 | Msambweni vs. Kilifi | 50.006 | 35.596 | 0.160 | Kilifi vs. Shimoni | −37.060 | 90.810 | 0.683 |
Msambweni vs. Lamu | 114.103 | 24.140 | <0.001 | Msambweni vs. Lamu | 80.292 | 21.988 | <0.001 | Lamu vs. Kipini | 16.376 | 18.520 | 0.377 |
Msambweni vs. Kipini | 193.509 | 28.342 | <0.001 | Msambweni vs. Kipini | 129.017 | 27.581 | <0.001 | Lamu vs. Shimoni | 20.224 | 62.980 | 0.748 |
Kilifi vs. Shimoni | −8.387 | 28.246 | 0.767 | Shimoni vs. Kilifi | 34.779 | 34.378 | 0.312 | ||||
Kilifi vs. Lamu | −22.819 | 28.095 | 0.417 | Shimoni vs. Lamu | 65.064 | 19.956 | 0.001 | ||||
Kilifi vs. Kipini | −102.226 | 31.778 | 0.001 | Shimoni vs. Kipini | 113.790 | 25.990 | <0.001 | ||||
Shimoni vs. Lamu | 14.433 | 16.994 | 0.396 | Kilifi vs. Lamu | −30.285 | 36.217 | 0.403 | ||||
Shimoni vs. Kipini | 93.839 | 22.568 | <0.001 | Kilifi vs. Kipini | −79.011 | 39.862 | 0.047 | ||||
Lamu vs. Kipini | 79.407 | 22.378 | <0.001 | Lamu vs. Kipini | 48.726 | 28.378 | 0.086 |
Species | Shimoni | Msambweni | Kilifi | Mambrui | Kipini | Lamu | All | |
---|---|---|---|---|---|---|---|---|
Panulirus ornatus | N | 203 | 47 | 31 | 85 | 111 | 410 | 887 |
Male | 124 | 27 | 18 | 48 | 50 | 215 | 482 | |
Female | 79 | 20 | 13 | 37 | 61 | 195 | 405 | |
Sex ratio (M:F) | 1:0.64 | 1:0.74 | 1:0.72 | 1:0.77 | 1:1.22 | 1:0.91 | 1:084 | |
χ2 | 9.98 | 1.04 | 0.81 | 1.42 | 1.09 | 0.98 | 6.68 | |
p-value | 0.01 | 0.31 | 0.37 | 0.23 | 0.30 | 0.32 | 0.01 | |
Panulirus homarus | N | 7 | 2 | 6 | 240 | 445 | 166 | 866 |
Male | 4 | 1 | 4 | 111 | 213 | 89 | 422 | |
Female | 3 | 1 | 2 | 129 | 232 | 77 | 444 | |
Sex ratio (M:F) | 1: 0.75 | 1:1 | 1:0.50 | 1: 1.16 | 1:1.08 | 1:0.87 | 1:1.11 | |
χ2 | 0.14 | 0.0 | 0.67 | 1.35 | 0.81 | 0.87 | 0.56 | |
p-value | 0.71 | 1.0 | 0.41 | 0.21 | 0.37 | 0.35 | 0.46 | |
Panulirus longipes | N | 313 | 152 | 62 | 20 | 60 | 140 | 747 |
Male | 143 | 79 | 33 | 11 | 42 | 75 | 381 | |
Female | 170 | 73 | 29 | 9 | 18 | 65 | 366 | |
Sex ratio (M:F) | 1:1.19 | 1:0.92 | 1:0.79 | 1:1.20 | 1:0.42 | 1:0.87 | 1:0.96 | |
χ2 | 2.33 | 0.24 | 0.26 | 0.20 | 9.60 | 0.71 | 0.58 | |
p-value | 0.13 | 0.63 | 0.61 | 0.66 | 0.01 | 0.40 | 0.30 |
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Kulmiye, A.J. Evidence of Considerable Shifts in Catch Composition in the Artisanal Spiny Lobster Fishery in Kenya. Biology 2023, 12, 1477. https://doi.org/10.3390/biology12121477
Kulmiye AJ. Evidence of Considerable Shifts in Catch Composition in the Artisanal Spiny Lobster Fishery in Kenya. Biology. 2023; 12(12):1477. https://doi.org/10.3390/biology12121477
Chicago/Turabian StyleKulmiye, Abdirahman J. 2023. "Evidence of Considerable Shifts in Catch Composition in the Artisanal Spiny Lobster Fishery in Kenya" Biology 12, no. 12: 1477. https://doi.org/10.3390/biology12121477