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首页> 外文期刊>Marine ecology progress series >Growth and survival of post-larval giant tiger shrimp Penaeus monodon feeding on mangrove leaf litter biofilms
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Growth and survival of post-larval giant tiger shrimp Penaeus monodon feeding on mangrove leaf litter biofilms

机译：以红树林凋落物生物膜为食的虾后对虾斑节对虾的生长和存活

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ABSTRACT: Biofilm associated with decomposing mangrove leaf litter is a food source for shrimp post-larvae (PL). PL of giant tiger shrimp Penaeus monodon foraging on leaf litter of Rhizophora mucronata with developing biofilm at 1, 3, 4, 6, and 8 wk of decomposition were tested for specific growth rate (SGR, %) and percentage survival (SR, %). Biofilm was analyzed for species composition, abundance, and biomass of microalgae and epifauna. Microalgal biomass increased with the progress of litter decomposition. Diatoms, especially Navicula sp. and Nitzschia sp., dominated the first 6 wk of litter decomposition with a percentage cover of 88 and 99% during the third and fourth weeks, respectively. Cyanobacteria dominated in the 8 wk old biofilm with 61% cover. Copepods dominated the epifauna during the first 3 wk of litter decomposition. In the 4 to 5 wk old litter, polychaetes were most abundant whereas nematodes were dominant in litter that had decomposed for 8 wk. PL foraging on 4 wk old litter had a higher SGR (1.6 ± 0.5%) and SR (39.8 ± 4.8%) coincident with the maximum abundance of microalgae and epifauna. The study illustrated that nutritionally rich biofilm for PL shrimp is: (1) developed during the fourth week of mangrove leaf litter decomposition and is dominated by diatoms, polychaetes, harpacticoid copepods, and oligochaetes; and (2) limited by the collapse of the epifauna and subsequent colonization by cyanobacteria in mangrove leaf litter decomposed beyond 4 wk.
机译：摘要：与分解红树林凋落物有关的生物膜是虾幼体（PL）的食物来源。测试了在1、3、4、6和8周分解的生物膜发育的，在生根腐菌（Rhizophora mucronata）叶垫上觅食的巨型老虎虾对虾的PL的特定生长率（SGR，％）和生存百分比（SR，％）。分析了生物膜的微藻和浮游动物的种类组成，丰度和生物量。随着凋落物分解的进展，微藻生物量增加。硅藻，尤其是 Navicula sp.。和 Nitzschia sp。，在垃圾分解的前6周中占主导地位，第三周和第四周的覆盖率分别为88％和99％。蓝细菌在8周大的生物膜中占主导地位，覆盖率为61％。 pe足类在分解的前三周内以表足动物为主。在4至5周的旧垫料中，多毛类动物最多，而线虫在分解8周的垫料中占主导地位。在4周龄的凋落物上觅食的PL具有较高的SGR（1.6±0.5％）和SR（39.8±4.8％），与微藻和表生动物的最大丰度相吻合。该研究表明，PL虾的营养丰富的生物被膜是：（1）在红树林凋落物分解的第四周内发育，并以硅藻，多毛类，类立足类co足类和寡毛类为主。 （2）受表皮动物崩溃和随后蓝藻在4 wk以上分解的蓝细菌定居的限制。

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