Silliman University-Angelo King Center for Research and Environmental Management, Dumaguete City, Philippines.
School of Agriculture, Geography, Ocean, and Natural Sciences, The University of South Pacific, Suva, Fiji.
J Fish Biol. 2021 Nov;99(5):1561-1575. doi: 10.1111/jfb.14861. Epub 2021 Aug 12.
Empirical evidence for increases in the reproductive potential (egg output per unit area) of coral reef fish in no-take marine reserves (NTMRs) is sparse. Here, we inferred the development of reproductive potential in two species of protogynous reef fishes, Chlorurus bleekeri (Labridae: Scarinae) and Cephalopholis argus (Epinephelidae), inside and outside of Philippine NTMRs. We estimated key reproductive parameters and applied these to species-specific density and length data from 17 NTMRs (durations of protection 0-11 years) and paired fished sites (controls) in a space-for-time substitution approach. For C. argus, we also used density and length data collected almost annually over 29 years from a NTMR and an adjacent control at Apo Island. The results suggest that C. bleekeri can develop 6.0 times greater reproductive potential in NTMRs than controls after 11 years of protection, equivalent to approximately 582,000 more eggs produced 500 m inside NTMRs. Enhancement of reproductive potential in C. argus was not evident after 11 years in the space-for-time substitution. At Apo Island NTMR, reproductive potential of C. argus increased approximately 6-fold over 29 years but NTMR/control ratios in reproductive potential decreased through time (from 3.2 to 2.4), probably due to spillover of C. argus from the NTMR to the control. C. argus was estimated to produce approximately 113,000 more eggs 500 m inside Apo Island NTMR at the 29th year of protection. Ratios of reproductive potential between NTMR and controls in C. bleekeri and C. argus were often greater than corresponding ratios in density or biomass. The study underscores the importance of species-specific reproductive life history traits that drive variation in the development of larval fish subsidies that originate from NTMRs.
关于禁捕区（NTMRs）内珊瑚礁鱼类生殖潜力（单位面积产卵量）增加的经验证据很少。在这里，我们推断了两种雌雄同体的珊瑚礁鱼类，Chlorurus bleekeri（Labridae：Scarinae）和 Cephalopholis argus（Epinephelidae），在菲律宾 NTMR 内外生殖潜力的发展。我们估计了关键的生殖参数，并将这些参数应用于来自 17 个 NTMR（保护时间 0-11 年）和配对捕捞点（对照）的特定物种的密度和长度数据，这是一种时空替代方法。对于 C. argus，我们还使用了在 Apo 岛的一个 NTMR 和一个相邻对照中几乎每年收集的 29 年的密度和长度数据。结果表明，在经过 11 年的保护后，C. bleekeri 在 NTMR 中可以发展出比对照高 6 倍的生殖潜力，相当于在 NTMR 内 500 米处产生大约 582000 个以上的卵。在时空替代中，C. argus 在经过 11 年的保护后，其生殖潜力的增强并不明显。在 Apo 岛 NTMR，C. argus 的生殖潜力在 29 年内增加了大约 6 倍，但生殖潜力的 NTMR/对照比值随时间减少（从 3.2 到 2.4），可能是由于 C. argus 从 NTMR 溢出到对照。在第 29 年保护时，Apo 岛 NTMR 内 500 米处估计 C. argus 产生的卵大约增加了 113000 个。C. bleekeri 和 C. argus 的 NTMR 与对照之间的生殖潜力比值通常大于密度或生物量的相应比值。该研究强调了特定物种生殖生活史特征的重要性，这些特征驱动了源自 NTMR 的幼鱼补贴的发展变化。
