Strehlow Brian W, Jorgensen Damien, Webster Nicole S, Pineda Mari-Carmen, Duckworth Alan
Centre for Microscopy, Characterisation and Analysis, School of Plant Biology, and Oceans Institute, University of Western Australia, Crawley, WA, Australia; Western Australian Marine Science Institution, Crawley, WA, Australia; Australian Institute of Marine Science, Townsville, QLD, Australia.
Australian Institute of Marine Science , Townsville , QLD , Australia.
PeerJ. 2016 Dec 13;4:e2761. doi: 10.7717/peerj.2761. eCollection 2016.
A digital, four-channel thermistor flowmeter integrated with time-lapse cameras was developed as an experimental tool for measuring pumping rates in marine sponges, particularly those with small excurrent openings (oscula). Combining flowmeters with time-lapse imagery yielded valuable insights into the contractile behaviour of oscula in . Osculum cross-sectional area (OSA) was positively correlated to measured excurrent speeds (ES), indicating that sponge pumping and osculum contraction are coordinated behaviours. Both OSA and ES were positively correlated to pumping rate (). Diel trends in pumping activity and osculum contraction were also observed, with sponges increasing their pumping activity to peak at midday and decreasing pumping and contracting oscula at night. Short-term elevation of the suspended sediment concentration (SSC) within the seawater initially decreased pumping rates by up to 90%, ultimately resulting in closure of the oscula and cessation of pumping.
一种集成了延时相机的数字四通道热敏电阻流量计被开发出来，作为测量海洋海绵体抽水速率的实验工具，特别是那些具有小排水口（出水口）的海绵体。将流量计与延时图像相结合，对海绵体出水口的收缩行为产生了有价值的见解。出水口横截面积（OSA）与测量的排水速度（ES）呈正相关，表明海绵体抽水和出水口收缩是协调行为。OSA和ES均与抽水速率呈正相关。还观察到了抽水活动和出水口收缩在昼夜的变化趋势，海绵体在中午将抽水活动增加到峰值，而在夜间则减少抽水并收缩出水口。海水中悬浮泥沙浓度（SSC）的短期升高最初使抽水速率降低了90%，最终导致出水口关闭并停止抽水。
