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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Baseline measurements of physiological and behavioural stress markers in the commercially important decapod Cancer pagurus (L.)
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Baseline measurements of physiological and behavioural stress markers in the commercially important decapod Cancer pagurus (L.)

机译：商业上重要的十足动物巨蟹座（L.）的生理和行为压力标记的基线测量

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摘要

Increasing human activities in marine environments pose possibilities of new stressors affecting marine invertebrates important for fisheries. However, assessment of such stressors is hampered by lack of baseline information on stress markers in relevant species, particularly relating to potential diel rhythms. Cancer pagurus is the second most important crustacean for UK fisheries and, owing to its migratory habits, is likely to encounter anthropogenic stressors both inshore and offshore. However, there are no baseline measurements of commonly used stress markers in this species, particularly on juveniles, nor data on diel variations. This study aimed to establish baseline data for several stress components in C. pagurus: haemolymph L-Lactate, D-Glucose, Haemocyanin, haemolymph density and respiration rate, as well as behavioural indicators (activity level, antennular flicking rate) during day and night. L-Lactate and D-Glucose concentrations were positively related to crab size, larger crabs having higher concentrations. L-Lactate and D-Glucose levels followed similar circadian rhythms increasing towards dusk, coinciding with higher locomotor activities. L-Lactate levels in juvenile crabs showed a significantly different pattern compared to larger crabs, with lower concentrations maintained throughout the day without any significant increase at dusk. Haemocyanin concentration and haemolymph density were not affected by crab size, sex or time. However, females (0.06 +/- 0.01 mg/g/h) consumed significantly more oxygen than males (0.04 +/- 0.01 mg/g/h). Activity levels increased significantly at night when foraging mainly occurs. Small crabs were more active, but had lower antennular flicking rates compared to medium and large crabs during both day and night. The present work shows that crab size and sampling time influence the value of commonly used crustacean stress markers, suggesting that these factors should be incorporated into any studies monitoring stress responses of Cancer pagurus.
机译：海洋环境中人类活动的增加带来了新的压力源，可能会影响对渔业重要的海洋无脊椎动物。但是，由于缺乏有关物种中应激标志物的基线信息，特别是与潜在的迪尔节律有关的基线信息，阻碍了对此类应激物的评估。巨蟹座是英国渔业中第二重要的甲壳类动物，由于其迁徙习性，它可能会在近海和近海遇到人为压力。但是，没有该物种中常用压力标记的基线测量值，特别是在少年身上，也没有diel变化的数据。这项研究的目的是为食蟹壳中的几个压力成分建立基线数据：白天和晚上的血淋巴L-乳酸，D-葡萄糖，血红素，血淋巴密度和呼吸速率，以及行为指标（活动水平，触角甩动率） 。 L-乳酸和D-葡萄糖的浓度与蟹的大小呈正相关，较大的蟹具有较高的浓度。左旋乳酸和右旋葡萄糖的水平遵循相似的昼夜节律，向黄昏逐渐增加，这与较高的运动能力相吻合。与较大的螃蟹相比，未成年螃蟹的L-乳酸水平显示出明显不同的模式，全天维持较低的浓度，黄昏时没有任何明显的增加。血红蛋白浓度和血淋巴密度不受蟹的大小，性别或时间的影响。但是，女性（0.06 +/- 0.01 mg / g / h）消耗的氧气明显多于男性（0.04 +/- 0.01 mg / g / h）。当主要发生觅食时，夜间的活动水平显着增加。与中型和大型螃蟹相比，小螃蟹在白天和黑夜都更加活跃，但其角膜甩动率较低。目前的工作表明，螃蟹的大小和采样时间会影响常用的甲壳类应激标志物的价值，这表明这些因素应纳入任何监测巨蟹座应激反应的研究中。

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