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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Structured habitat provides a refuge from blue crab, Callinectes sapidus, predation for the bay scallop, Argopecten irradians concentricus(Say 1822)
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Structured habitat provides a refuge from blue crab, Callinectes sapidus, predation for the bay scallop, Argopecten irradians concentricus(Say 1822)

机译：结构化的栖息地为蓝蟹，Callinectes sapidus，海湾扇贝的捕食者，Argopecten irradians concentricus提供了庇护（Say 1822）

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摘要

Predation in estuarine systems is an important source of mortality for benthic organisms. In laboratory mesocosm experiments, we assessed the survival of bay scallops (Argopecten irradians concentricus) of various sizes (10-19 mm, 20-29 mm, 30-39 mm, and 40-50 mm shell height; SH) as a function of female blue crab, Callinectes sapidus, predation as it varied with habitat (oyster shell, sand, Gracilaria spp.) and predator size (＞140 mm, ＜140 mm carapace width; CW) in a balanced two-by-three factorial design. Scallops of all sizes were afforded higher proportional survival with small female crabs (0.61, SE = 0.05) compared to that with large female crabs (0.36, SE = 0.05), and the proportion of scallops surviving was highest in oyster shell (0.61, SE = 0.08), as compared to the Gracilaria spp. and sand treatments, at 0.41 (SE = 0.06) and 0.42 (SE = 0.07), respectively. Subsequent field-tethering experiments conducted in the Lynnhaven River sub-estuary of the lower Chesapeake Bay further illustrated the effect of habitat on the survival of juvenile bay scallops (＜30 mm SH); survival after 48 h differed significantly by habitat and location, but not size, and there were no interactions. Proportional survival was significantly higher in Gracilaria spp. treatment (0.60, SE = 0.07) as compared to other habitats, and it was higher at Alanton's Cove (0.60, SE = 0.10) compared to other locations. Overall, scallop survival was low; however, transplanting scallops in structured substrates with protection against predation, such as oyster shell and Gracilaria spp., will likely increase the success of restoration efforts.
机译：河口系统中的捕食是底栖生物死亡的重要来源。在实验室的中观宇宙实验中，我们评估了各种尺寸（10-19毫米，20-29毫米，30-39毫米和40-50毫米壳高； SH）的海湾扇贝（Argopecten irradians concentricus）的存活率与雌性蓝蟹，Callinectes sapidus，捕食性随生境（牡蛎壳，沙子，龙须属）和捕食者大小（＞ 140毫米，＜140毫米甲壳宽度； CW）而变化，采用平衡的二乘三析因设计。与雌性大蟹（0.36，SE = 0.05）相比，各种尺寸的扇贝在小雌蟹（0.61，SE = 0.05）中具有更高的成比例存活率，扇贝存活率最高的是牡蛎壳（0.61，SE） = 0.08），与Gracilaria spp相比。和砂处理，分别为0.41（SE = 0.06）和0.42（SE = 0.07）。随后在切萨皮克湾下游的林恩黑文河河口进行的野外系留实验进一步说明了栖息地对少年贝扇贝（＜30 mm SH）生存的影响； 48小时后的存活率因栖息地和位置而异，但大小无明显差异，并且没有相互作用。 Gracilaria spp中的比例存活率显着更高。处理（0.60，SE = 0.07）与其他栖息地相比，在Alanton's Cove（0.60，SE = 0.10）上高于其他地区。总体而言，扇贝存活率很低。但是，将扇贝移植到结构化的底物中，防止牡蛎壳和Gracilaria spp。等捕食，可能会增加恢复工作的成功率。

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