1. Fish carcass decomposition can generate fluxes of nutrients to the water column at levels comparable to other major nutrient sources. However, relatively little is known about the biological processes modulating fish decay or the rates at which carcass‐bound nutrients are made available to the biota.
2. This study focused on quantifying scavenger‐mediated phosphorus (P) recycling, because the availability of this essential element can regulate the trophic state of aquatic ecosystems.
3. To explore the role of some important macroscopic aquatic scavengers in P recycling, laboratory experiments were conducted where carcasses of two fish species (common bleak Alburnus alburnus; pumpkinseed Lepomis gibbosus) were offered to two size classes of black bullhead (Ameiurus melas) and two crustacean species (spiny‐cheek crayfish Faxonius limosus; narrow‐clawed crayfish Astacus leptodactylus).
4. Our results show that the black bullhead and the two crayfish species are highly efficient macroscopic decomposers as the P contents of scavenged carcasses were reduced at significantly higher rates compared to those of microbially decomposed (control) carcasses.
5. Pumpkinseed carcasses proved to be more resistant to rapid decomposition, as they typically lost lower proportions of their P content than bleak carcasses during the course of the experiments.
6. Scavengers sequestered a relatively large fraction (up to 33% in black bullhead and 36% in crayfish) of total carcass P in their bodies. This suggests that the consumer species used in this study can transfer/return considerable quantities of carcass‐derived nutrients directly to higher trophic levels incorporated into their own tissues, and may serve as an additional, short‐term sink of these nutrients.

中文翻译：

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清除剂驱动的鱼car体分解和磷回收利用：淡水鱼和小龙虾的实验室实验

1. 鱼的decomposition体分解可以产生营养素流到水柱，其水平与其他主要营养素来源相当。但是，关于调节鱼类腐烂的生物过程或car体结合的养分可提供给生物群的速率的信息知之甚少。
2. 这项研究的重点是量化清除剂介导的磷（P）的循环利用，因为这种基本元素的可用性可以调节水生生态系统的营养状态。
3. 为了探索一些重要的宏观水质清除剂在磷回收中的作用，进行了实验室实验，将两种鱼（常见的暗淡的赤褐色；赤眼的种子Lepomis gibbosus）的尸体分别提供给两种大小的黑bull（Ameiurus melas）和两种甲壳类动物。物种（多刺小龙虾Faxonius limosus；狭爪小龙虾Astacus leptodactylus）。
4. 我们的结果表明，黑牛头和两个小龙虾物种是高效的宏观分解物，与微生物分解（对照）的尸体相比，清除的尸体的P含量降低的速率明显更高。
5. 南瓜籽尸体被证明对快速分解具有更强的抵抗力，因为在实验过程中，南瓜籽P通常损失的磷含量低于黯淡的尸体。
6. 清道夫将体内bodies体P的大部分隔离（在黑bull头中占33％，在小龙虾中占36％）。这表明本研究中使用的食用物种可以将大量car体来源的养分直接转移/返回到自身组织中的较高营养水平，并且可以作为这些养分的额外短期吸收。