Darling Marine Center, School of Marine Sciences, University of Maine, 193 Clarks Cove Road, Walpole, ME 04573-3307, USA
Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543-1535, USA.
J R Soc Interface. 2018 Jan;15(138). doi: 10.1098/rsif.2017.0755.
We present some of the few suspension-feeding measurements and to our knowledge the first velocity-field measurements for early post-settlement juvenile bivalve clams. We verify and extend our experimental results with numerical simulations. For 1.8-2.8 mm shell length clams, pumping rates ranged 0.03-0.22 μl s, inhalant siphon Reynolds numbers () ranged 0.16-0.79 and mean inhalant velocities ranged 0.8-3.2 mm s Owing to the low at which they pump and the small diameters of their siphons, juvenile clams are subject to unique hydrodynamic challenges, including high siphon resistance and susceptibility to refiltration. At least three features of juvenile clam siphons differentiate them from those of adults-shorter inhalant siphon length, a more rapid increase in inhalant siphon diameter with shell length, and the presence of a prominent exhalant siphon extension. These features are probably adaptations to the challenges of suspension feeding at low .
我们展示了一些滤食测量结果，据我们所知，这是第一批针对早期刚定居的幼蚌滤食的速度场测量结果。我们通过数值模拟验证和扩展了我们的实验结果。对于壳长为 1.8-2.8 毫米的蚌类，抽吸率范围为 0.03-0.22 μl s，吸入虹吸管雷诺数 ()范围为 0.16-0.79，平均吸入速度范围为 0.8-3.2 mm s。由于它们抽吸的速度较低，虹吸管的直径较小，幼年蚌类面临着独特的水动力挑战，包括高虹吸管阻力和易受再过滤的影响。幼蚌虹吸管至少有三个特征与成体不同——吸入虹吸管长度更短，随着壳长的增加，吸入虹吸管直径的增加更快，以及存在明显的呼出虹吸管延伸。这些特征可能是对低 下滤食的挑战的适应。
