Cardisoma carnifex (Herbst, 1796)
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publication ID |
https://doi.org/ 10.6620/ZS.2023.62-22 |
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persistent identifier |
https://treatment.plazi.org/id/03E64D7F-1703-2C69-B9BC-F9189304928B |
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treatment provided by |
Felipe |
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scientific name |
Cardisoma carnifex |
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A total of 1521 and 4253 ovigerous female C. carnifex were observed migrating to the sea in 2020 and 2021, respectively. The majority of the migration occurred between June and September, the onset of the rainy season and the end of the rainy season, respectively ( Fig. 2 View Fig ). The main migration season was July and August ( Fig. 2A, 2B View Fig ), and the number of migrating females decreased abruptly in October ( Fig. 2C View Fig ).
The migration exhibited a semilunar rhythm. The peak migration occurred about 3 days after the new and full moon (3.3 ± 2.6 days in 2020; 3.2 ± 1.3 days in 2021) during the intermediate amplitude nocturnal high tides (5.6 ± 6.6 days before and 8.9 ± 7.1 days after the maximum amplitude nocturnal high tides in 2020 and 2021, respectively) ( Table 1; Fig. 2A, 2B View Fig ). The migration seemed to occur around the maximum amplitude diurnal high tides (1.0 ± 11.0 days and 2.8 ± 8.6 days after the maximum amplitude diurnal high tides in 2020 and 2021, respectively), but with r values of 0.42 and 0.50 in 2020 and 2021, respectively ( Table 1; Fig. 2A, 2B View Fig ). This suggests that the timing of migration was less consistent with the maximum amplitude diurnal high tides. The daily number of seaward migrating females varied with the lunar phase. The highest number of daily migrating females was 264 and 687 crabs occurring on 23 July 2020 and 26 July 2021, respectively ( Fig. 2A, 2B View Fig ).
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