Coconut crab resource management based on male size-dependent reproductive potentials

椰子蟹资源的收获模式是性别和体型偏向的，只有体型较大的雄性(胸长40 mm)才能收获。在收获的种群中，性别比明显向雌性倾斜，平均雄性大小下降。因此，留下来的体型较小的雄性可能会比未收获的种群经历更多的交配。然而，椰子蟹的雄性生殖潜力(例如与雌性交配和/或使雌性卵子受精的能力)肯定取决于身体大小。因此，雌性将遭受精子供应不足的痛苦，无法使其所有的卵子受精，并降低在收获种群中遇到潜在配偶(较大的雄性)的概率，导致收获种群的繁殖率可能下降。因此，我们建议仅限雄性采摘，并限制狭缝大小，作为椰子蟹的有效管理措施。

The harvesting pattern for coconut crab resource was sex- and body size-biased, in which larger males (>40 mm thoracic length) were exclusively taken. Sex ratio was skewed significantly toward females and mean male size decreased in the harvested population. Thus, small males that are left are likely to experience more matings than in non-harvested populations. However, coconut crab male reproductive potentials (e.g. ability to mate with female and/or to fertilize female ova) are definitively body size dependent. Therefore, females would suffer from insufficient sperm supply to fertilize all their eggs and decease in probability of encountering potential mates (larger males) in the harvested population, resulting in the reproductive rate of the harvested population is likely to decrease. Therefore, we recommend male-only harvesting with slot size limits as an effective management measure for coconut crabs.