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首页> 外文期刊>The Biological Bulletin >Food Restrictions Affect the Larval Metamorphosis and Early Juvenile Performance in a Neotropical Mangrove Fiddler Crab (Leptuca cumulanta)
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Food Restrictions Affect the Larval Metamorphosis and Early Juvenile Performance in a Neotropical Mangrove Fiddler Crab (Leptuca cumulanta)

机译：食物限制影响幼虫和早期的少年性能在新营养的红树叶小提琴蟹（Leptuca Cumulanta）中

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Sporadic fluctuations in food availability may affect larval biology and post-metamorphic development in many marine invertebrates. In an experimental study in the laboratory, we investigated whether different regimes (1, 3, and 5 days) of initial starvation or feeding affect the survival and duration of the last planktotrophic larval stage (i.e., megalopa) of the neotropical mangrove fiddler crab Leptuca cumulanta. Newly metamorphosed crabs originating from megalopae starved for 1 and 3 days were cultured through the first 5 juvenile stages to further evaluate whether prior nutritional experience affects the post-larval performance of this species. All megalopae that were starved continuously died, while 80% of the larvae that were fed constantly metamorphosed successfully into the juvenile stage. Megalopae initially starved for 3 and 5 days exhibited lower survival (55% and 30% of larval metamorphosis, respectively) than larvae starved for only 1 day (85%) or fed constantly. The starvation periods (1, 3, and 5 days) also significantly prolonged the mean megalopal stage duration (12.8, 13.9, and 14.3 days, respectively) compared to the continuous feeding regime (10.6 days). Survival of the megalopae subjected to different periods of initial feeding (1, 3, and 5 days) was significantly lower (15.0%, 57.5%, and 62.5%, respectively) than survival of the larvae fed constantly. The mean megalopal stage duration, by contrast, did not vary among megalopae initially fed for 3 and 5 days or fed continuously (10.4 days). The larval starvation did not affect survival and carapace shape of juveniles, but it did alter their intermolt period, growth, and body size. These carryover effects were stronger in the first juvenile crab stage than in other juvenile stages. Our results indicate that the timing and duration of the starvation or feeding regime experienced by the megalopae may affect their successful survival and developmental period until metamorphosis to juvenile life. In
机译：食品可用性的零星波动可能会影响许多海洋无脊椎动物的幼虫生物学和变质后发育。在实验室的实验研究中，我们调查了初始饥饿或喂养的不同制度（1,3和5天）是否影响了NeoTropical Comgrove Biddler Crab Leptuda的最后一层植物幼虫阶段（即巨大）的存活率和持续时间Cumulanta。通过前5个幼年阶段培养源自巨大的巨大巨大的新变质蟹，以进一步评估现有营养经验是否会影响本物种的后幼虫性能。所有巨大的巨大饥饿，而连续死亡，而80％的幼虫被喂养的幼虫成功地变成了少年阶段。巨大饥饿3和5天，在幼虫饥饿的幼虫仅为1天（85％）或不断喂食，表现出较低的存活率（分别为55％和30％）。与连续进料制度（10.6天）相比，饥饿期（1,3和5天）也显着延长平均壮观阶段持续时间（分别为12.8,13.9和14.3天）。对不同初始喂养时期（1,3和5天）的巨大蜂杏醛的存活率显着降低（分别为幼虫的存活率较低（15.0％，57.5％和62.5％）。相比之下，平均壮观阶段持续时间在巨大的巨大不变，最初喂养3和5天或连续喂食（10.4天）。幼虫饥饿不影响少年的生存和甲壳形状，但它确实改变了他们的接收期，生长和体型。这些携带效应在第一个少年蟹阶段比其他少年阶段更强。我们的结果表明，巨大经历的饥饿或喂养制度的时序和持续时间可能会影响其成功的存活和发育期，直到变态到少年生命。在

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