Motile behavior and predation risk in planktonic copepods

Limnology and Oceanography - Tập 62 Số 5 - Trang 1810-1824 - 2017
Hans van Someren Gréve1, Rodrigo Almeda1, Thomas Kiørboe1
1Centre for Ocean Life, National Institute for Aquatic Resources, Technical University of Denmark, Charlottenlund, Denmark

Tóm tắt

AbstractPredation is an important source of mortality in zooplankton but factors governing predation risk in marine food webs are still not well understood. Here, we examine the role of zooplankton behavior in determining predation risk. We first quantified motility of copepods with different feeding behaviors (ambush feeding, cruising, and feeding‐current feeding). Second, we estimated remote predator detection and escape characteristics of the studied copepods. Third, we proposed a simple behavior‐dependent encounter model to predict copepod predation risk from rheotactic predators. Finally, we compared our predictions with predation risk previously determined experimentally. For similar sized copepods, predicted predation risks were similar between feeding‐current feeders and cruising feeders, whereas predation was up to 8.5 times lower (range: 1.5–8.5) for ambush feeders. Predicted predation risks further differed between males and females depending on feeding behavior: in ambush feeders males actively search for non‐motile females and their predation risk was up to 6 times higher (range 1.2–6) than for females. In contrast, feeding current‐ and cruising feeders showed small differences in predation risk between genders. In all cases, predicted relative predation risks between particular behaviors were confirmed by empirical data from previous predation experiments. Our results demonstrate that prey behavior of zooplankton may lead to a predictable variation in predation risk from rheotactic predators of up to an order of magnitude, and therefore that individual behavior is an important factor in structuring zooplankton communities.

Từ khóa


Tài liệu tham khảo

Alcaraz M., 2003, Encyclopedia of life support systems (EOLSS), 16

10.1002/ecs2.1668

10.1002/lno.10229

10.1007/s00227-011-1763-y

10.1016/0967-0653(94)92545-3

10.1093/icesjms/fst125

10.1093/plankt/22.6.1085

10.4319/lo.2002.47.3.0636

10.3354/meps268183

10.1093/plankt/19.9.1289

10.1093/plankt/fbt077

10.1111/evo.12874

10.1139/f77-008

10.3354/meps11039

10.1007/BF00026317

10.3354/meps10265

10.3354/meps331119

10.3354/meps230195

10.4319/lo.2010.55.5.2193

10.1098/rspb.2014.0739

10.1098/rspb.1967.0072

10.1111/j.1439-0485.1995.tb00406.x

10.3354/meps07749

10.1002/lno.10494

10.1007/s00442-005-0346-3

10.4319/lo.2007.52.4.1511

10.1007/s00442-007-0893-x

10.1111/j.1469-185X.2010.00148.x

10.1093/icb/ict021

10.3354/meps179097

10.3354/meps179081

10.4319/lo.2005.50.6.1999

10.1073/pnas.0903350106

10.1098/rsif.2010.0176

10.1098/rsif.2012.0693

10.1073/pnas.1405260111

10.1890/14-2205.1

10.1098/rsbl.2011.1073

10.4319/lo.1981.26.6.1062

10.1139/z90-092

10.1093/plankt/fbt019

10.4319/lo.2013.58.1.0173

Ohman M. D., 1988, Behavioral‐responses of zooplankton to predation, Bull. Mar. Sci., 43, 530

10.1038/35088068

10.1023/A:1021228900786

10.1023/A:1013162605809

10.1093/plankt/16.10.1329

10.4319/lo.2007.52.2.0668

10.4319/lo.2014.59.6.2077

10.1038/srep14962

10.2307/2671063

10.3354/meps07376

10.3354/meps066023

10.4319/lo.1997.42.1.0164

10.3354/meps213203

10.3354/meps126153

10.3354/meps130277

10.1093/plankt/fbm029

10.1093/plankt/fbp084

Thông tin
Thông tin xuất bản

Limnology and Oceanography

Tập 62 Số 5

1810-1824

Thông tin tác giả