Spat efficiency in the pearl oyster Pinctada radiata (Leach, 1814) in the surface and bottom water at Karantina Island
, , , , , oraz | 18 cze 2020
O artykule
Article Category: Research Article
Data publikacji: 18 cze 2020
Zakres stron: 184 - 192
Otrzymano: 30 wrz 2019
Przyjęty: 08 lis 2019
DOI: https://doi.org/10.1515/ohs-2020-0017
© 2020 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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The number of P. radiata spats and the percentage distribution of length in the outer and inner mesh bags of collectors during the study (n – the number of individuals, SO – surface outer mesh bag, SI – surface inner mesh bag, BO – bottom outer mesh bag, BI – bottom inner mesh bag)
| Months/Collectors | < 10 mm | 11–20 mm | 21–30 mm | 31–40 mm | 41–50 mm | > 50 mm | ||
|---|---|---|---|---|---|---|---|---|
| August | SO | 49 | 89.8 | 10.2 | 0.0 | 0.0 | 0.0 | 0.0 |
| SI | 48 | 54.2 | 45.8 | 0.0 | 0.0 | 0.0 | 0.0 | |
| BO | 35 | 94.3 | 5.7 | 0.0 | 0.0 | 0.0 | 0.0 | |
| BI | 59 | 81.4 | 18.7 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Sampling failed in September | ||||||||
| October | SO | 58 | 5.2 | 50.0 | 44.8 | 0.0 | 0.0 | 0.0 |
| SI | 92 | 1.1 | 28.3 | 68.5 | 2.2 | 0.0 | 0.0 | |
| BO | 25 | 16.0 | 56.0 | 28.0 | 0.0 | 0.0 | 0.0 | |
| BI | 60 | 5.0 | 38.3 | 56.7 | 0.0 | 0.0 | 0.0 | |
| November | SO | 55 | 5.5 | 14.6 | 72.7 | 7.3 | 0.0 | 0.0 |
| SI | 94 | 3.2 | 30.9 | 48.9 | 17.0 | 0.0 | 0.0 | |
| BO | 33 | 18.2 | 24.2 | 51.5 | 6.1 | 0.0 | 0.0 | |
| BI | 44 | 11.4 | 15.9 | 59.1 | 13.6 | 0.0 | 0.0 | |
| December | SO | 52 | 7.7 | 19.2 | 46.2 | 26.9 | 0.0 | 0.0 |
| SI | 73 | 0.0 | 16.4 | 56.2 | 27.4 | 0.0 | 0.0 | |
| BO | 10 | 20.0 | 10.0 | 40.0 | 30.0 | 0.0 | 0.0 | |
| BI | 44 | 4.6 | 18.2 | 65.9 | 11.4 | 0.0 | 0.0 | |
| January | SO | 40 | 2.5 | 12.5 | 40.0 | 45.0 | 0.0 | 0.0 |
| SI | 90 | 2.2 | 18.9 | 55.6 | 22.2 | 1.1 | 0.0 | |
| BO | 18 | 5.6 | 33.3 | 44.4 | 16.7 | 0.0 | 0.0 | |
| BI | 36 | 11.1 | 27.8 | 44.4 | 16.7 | 0.0 | 0.0 | |
| February | SO | 74 | 1.4 | 16.2 | 47.3 | 35.1 | 0.0 | 0.0 |
| SI | 81 | 1.2 | 16.1 | 44.5 | 38.3 | 0.0 | 0.0 | |
| BO | 8 | 0.0 | 12.5 | 50.0 | 37.5 | 0.0 | 0.0 | |
| BI | 31 | 3.2 | 16.1 | 51.6 | 29.0 | 0.0 | 0.0 | |
| March | SO | 45 | 2.2 | 15.6 | 53.3 | 28.9 | 0.0 | 0.0 |
| SI | 71 | 4.2 | 29.6 | 47.9 | 16.9 | 1.4 | 0.0 | |
| BO | 34 | 11.8 | 35.3 | 32.4 | 20.6 | 0.0 | 0.0 | |
| BI | 32 | 0.0 | 28.1 | 65.6 | 6.3 | 0.0 | 0.0 | |
| April | SO | 42 | 0.0 | 14.3 | 50.0 | 35.7 | 0.0 | 0.0 |
| SI | 48 | 0.0 | 18.8 | 50.0 | 25.0 | 6.3 | 0.0 | |
| BO | 16 | 0.0 | 6.3 | 62.5 | 31.3 | 0.0 | 0.0 | |
| BI | 17 | 0.0 | 17.7 | 35.3 | 47.1 | 0.0 | 0.0 | |
| May | SO | 38 | 0.0 | 13.2 | 50.0 | 31.6 | 5.3 | 0.0 |
| SI | 44 | 0.0 | 18.2 | 47.7 | 22.7 | 11.4 | 0.0 | |
| BO | 9 | 0.0 | 11.1 | 33.3 | 44.5 | 11.1 | 0.0 | |
| BI | 35 | 0.0 | 17.2 | 25.7 | 42.9 | 14.3 | 0.0 | |
| June | SO | 46 | 4.3 | 10.9 | 37.0 | 21.7 | 17.4 | 8.7 |
| SI | 49 | 4.1 | 14.3 | 36.7 | 20.4 | 18.4 | 6.1 | |
| BO | 22 | 4.5 | 18.2 | 27.3 | 13.6 | 27.3 | 9.1 | |
| BI | 31 | 3.2 | 9.7 | 35.5 | 29.0 | 19.4 | 3.2 | |
| July | SO | 49 | 8.2 | 18.4 | 30.6 | 16.3 | 12.2 | 14.3 |
| SI | 50 | 12.0 | 14.0 | 26.0 | 16.0 | 14.0 | 18.0 | |
| BO | 6 | 16.7 | 0.0 | 0.0 | 16.7 | 16.7 | 50.0 | |
| BI | 19 | 0.0 | 10.5 | 5.3 | 31.6 | 31.6 | 21.1 | |
| August | SO | 49 | 4.1 | 16.3 | 14.3 | 14.3 | 26.5 | 24.5 |
| SI | 64 | 10.9 | 9.4 | 17.2 | 10.9 | 25.0 | 26.6 | |
| BO | 10 | 0.0 | 20.0 | 10.0 | 20.0 | 10.0 | 40.0 | |
| BI | 24 | 0.0 | 16.7 | 20.8 | 20.8 | 37.5 | 4.2 | |