Burrowing behaviour of the juvenile rapa whelk Rapana venosa (Valenciennes, 1846) reared under laboratory conditions: A protective behaviour
Burrowing behaviour of the juvenile rapa whelk Rapana venosa (Valenciennes, 1846) reared under laboratory conditions: A protective behaviour
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DOI：
10.1111/are.15183
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发表时间：
2021-02
影响因子：
2
通讯作者：
Zheng‐Lin Yu;Jie Feng;Hao Song;Mei‐Jie Yang;Zhi Hu;Cong Zhou;Pu Shi;Xiao-Lin Wang;Tao Zhang
中科院分区：
文献类型：
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作者：
Zheng‐Lin Yu;Jie Feng;Hao Song;Mei‐Jie Yang;Zhi Hu;Cong Zhou;Pu Shi;Xiao-Lin Wang;Tao Zhang
幼脉红螺在变态后立即易受攻击。幼鱼的高死亡率严重限制了水产养殖业的发展。许多腹足类都利用挖洞来适应环境，脉纹蛙是一种分布广泛的腹足类，但对其生态学，尤其是挖洞行为的研究却很少。本文研究了脉脉蛙幼鱼明显的穴居行为。结果表明，幼螺的大小、沉积物的粒度、溶解氧和水温对幼螺的挖洞行为有显著影响。大型幼体具有很强的挖洞能力。小粒径沉积物的挖洞时间最短。当溶解氧较高（8 mg/L）时，幼鱼表现出明显的挖洞行为，随着溶解氧的降低，幼鱼的挖洞行为减弱。低温或高温（分别≤15或30°C）显著增加了洞穴的速度和深度。此外，壳高<2.5 cm的小型钉螺在水温较低（5°C）时，出现明显的壳和组织脱落（一种异常现象）。小螺在直径为0.50- 1.00mm的沙里潜穴，可减少壳和组织脱落，降低死亡率，说明潜穴是一种保护性行为，使幼螺适应环境。我们的研究结果增加了蜗牛对特定环境因素的反应的知识体系，并允许更好地了解该物种在其自然环境中的需求，并可用于改善R. venosa的商业育种策略。
JuvenileRapana venosaare vulnerable immediately after metamorphosis. The high mortality rate of juveniles seriously limits the development of the aquaculture industry. A number of gastropods use burrowing as an environmental adaptation.R. venosais a widespread gastropod species, but little is known about its ecology, especially its burrowing behaviour. Here, we studied the obvious burrowing behaviour of juvenileR. venosa. Our results showed that the size of the juvenile snail, grain size of the sediment, dissolved oxygen and water temperature significantly affect the burrowing behaviour of juveniles. Large juveniles have a strong burrowing capacity. The shortest burrowing time occurred in sediment of small grain size. When dissolved oxygen was high (8 mg/L), juveniles displayed obvious burrowing behaviour, and as the dissolved oxygen decreased, the juveniles reduced their burrowing behaviour. Low or high temperatures (≤15 or 30°C, respectively) significantly increased the burrowing rate and depth. Moreover, small snails (shell height <2.5 cm) exhibited obvious shell and tissue detachment (an abnormal phenomenon) when the water temperature was low (5°C). Small snails could reduce shell and tissue detachment and mortality rate by submerging themselves in sand (diameter: 0.50–1.00 mm), indicating that burrowing was a kind of protective behaviour that enables juvenileR. venosato adapt to the environment. Our results add to the body of knowledge on snail responses to particular environmental factors and allow a better understanding of the species’ needs in its natural environment and can be used to improve commercial breeding strategies forR. venosa.