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Dr Clement Lagrue

Science Advisor EcosystemsClement-Lagrue
Department of Conservation
Dunedin Office

Emails: clagrue@doc.govt.nz / clement.lagrue@otago.ac.nz
Phone: 64-27-340-7610

Google Scholar profile

ORCID Profile

Research Interests

  • Parasite diversity in marine and freshwater birds
  • Effects of introduced pests 9especially hedgehogs and rodents) in small ecosystems
  • Naturally rare ecosystem conservation and restoration
  • Effects of invasive weeds on small ecosystem communities
  • Native invertebrate diversity, ecology and conservation
  • Restoration of braided rivers (effects on birds and freshwater communities)

I am a conservation ecologist and parasitologist (from a previous life…) working on a diversity of ecosystems and leading research projects addressing a range of applied ecological issues. My work focuses on what is defined as naturally rare ecosystems; small discrete ecosystems representing less than 0.05% of New Zealand’s surface area. Despite their small size, such ecosystems hold comparatively high ecological values and many specific and endangered taxa, both plants and animals. My current projects focus on limestone, saline, coastal turf and freshwater spring ecosystems.

I also collaborate with researchers and students in the Zoology Department on different projects (limestone microsnails and invertebrates, seabird parasites, braided river restoration) and would welcome interest from students looking for research projects in collaboration with DOC. My main focuses currently are braided river pest predators, rank grass effects in limestone ecosystems and interactions with rodents, impacts of hedgehogs on limestone lizards and invertebrates.
Lagrue-outcrop

Lagrue-trapdoorLagrue-spider

Limestone outcrop (Castle Rock, Southland) and one of the cool critters found on limestone (trap-door spiders).

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Publications

Galipaud, M., Bollache, L., & Lagrue, C. (2021). Cryptic diversity and sexual selection. In R. Cothran & M. Thiel (Eds.), Reproductive biology: The natural history of the crustacea. (pp. 447-471). New York, NY: Oxford University Press. doi: 10.1093/oso/9780190688554.003.0016

Friesen, O., Poulin, R., & Lagrue, C. (2021). Temperature and multiple parasites combine to alter host community structure. Oikos. Advance online publication. doi: 10.1111/oik.07813

Shanebeck, K. M., Presswell, B., & Lagrue, C. (2020). Missing link: California rock crabs serve as intermediate hosts for the parasite Helicometrina nimia. Journal of Helminthology, 94, e143. doi: 10.1017/s0022149x20000218

Friesen, O. C., Goellner, S., Poulin, R., & Lagrue, C. (2020). Parasites shape community structure and dynamics in freshwater crustaceans. Parasitology, 147, 182-193. doi: 10.1017/s0031182019001483

Friesen, O. C., Goellner, S., Poulin, R., & Lagrue, C. (2019). Parasite infection reduces predation risk by dragonfly larvae in crustacean prey. Hydrobiologia, 835, 63-70. doi: 10.1007/s10750-019-3929-4

Galipaud, M., Bollache, L., & Lagrue, C. (2021). Cryptic diversity and sexual selection. In R. Cothran & M. Thiel (Eds.), Reproductive biology: The natural history of the crustacea. (pp. 447-471). New York, NY: Oxford University Press. doi: 10.1093/oso/9780190688554.003.0016

Chapter in Book - Research

Friesen, O., Poulin, R., & Lagrue, C. (2021). Temperature and multiple parasites combine to alter host community structure. Oikos. Advance online publication. doi: 10.1111/oik.07813

Journal - Research Article

Friesen, O. C., Goellner, S., Poulin, R., & Lagrue, C. (2020). Parasites shape community structure and dynamics in freshwater crustaceans. Parasitology, 147, 182-193. doi: 10.1017/s0031182019001483

Journal - Research Article

Shanebeck, K. M., Presswell, B., & Lagrue, C. (2020). Missing link: California rock crabs serve as intermediate hosts for the parasite Helicometrina nimia. Journal of Helminthology, 94, e143. doi: 10.1017/s0022149x20000218

Journal - Research Article

Friesen, O. C., Goellner, S., Poulin, R., & Lagrue, C. (2019). Parasite infection reduces predation risk by dragonfly larvae in crustacean prey. Hydrobiologia, 835, 63-70. doi: 10.1007/s10750-019-3929-4

Journal - Research Article

Vielma, S., Lagrue, C., Poulin, R., & Selbach, C. (2019). Non-host organisms impact transmission at two different life stages in a marine parasite. Parasitology Research, 118, 111-117. doi: 10.1007/s00436-018-6121-2

Journal - Research Article

Friesen, O. C., Poulin, R., & Lagrue, C. (2018). Parasite-mediated microhabitat segregation between congeneric hosts. Biology Letters, 14(2), 20170671. doi: 10.1098/rsbl.2017.0671

Journal - Research Article

Lagrue, C., Besson, A. A., & Lecerf, A. (2018). Small alteration – big impacts: Effects of small-scale riparian forest management on host–parasite dynamics in streams. Journal of Helminthology, 92(1), 64-73. doi: 10.1017/S0022149X16000936

Journal - Research Article

Lagrue, C., MacLeod, C. D., Keller, L., & Poulin, R. (2018). Caste ratio adjustments in response to perceived and realised competition in parasites with division of labour. Journal of Animal Ecology, 87(5), 1429-1439. doi: 10.1111/1365-2656.12873

Journal - Research Article

Lagrue, C., Presswell, B., Dunckley, N., & Poulin, R. (2018). The invasive cestode parasite Ligula from salmonids and bullies on the South Island, New Zealand. Parasitology Research, 117(1), 151-156. doi: 10.1007/s00436-017-5684-7

Journal - Research Article

MacLeod, C., Poulin, R., & Lagrue, C. (2018). Save your host, save yourself? Caste-ratio adjustment in a parasite with division of labor and snail host survival following shell damage. Ecology & Evolution, 8(3), 1615-1625. doi: 10.1002/ece3.3782

Journal - Research Article

Rosenkranz, M., Lagrue, C., Poulin, R., & Selbach, C. (2018). Small snails, high productivity? Larval output of parasites from an abundant host. Freshwater Biology, 63, 1602-1609. doi: 10.1111/fwb.13189

Journal - Research Article

Cirtwill, A. R., Lagrue, C., Poulin, R., & Stouffer, D. B. (2017). Host taxonomy constrains the properties of trophic transmission routes for parasites in lake food webs. Ecology, 98(9), 2401-2412. doi: 10.1002/ecy.1927

Journal - Research Article

Cohen, J. E., Poulin, R., & Lagrue, C. (2017). Linking parasite populations in hosts to parasite populations in space through Taylor's law and the negative binomial distribution. PNAS, 114(1), E47-E56. doi: 10.1073/pnas.1618803114

Journal - Research Article

Filion, A., Lagrue, C., Presswell, B., & Poulin, R. (2017). Behavioural modification of personality traits: Testing the effect of a trematode on nymphs of the red damselfly Xanthocnemis zealandica. Parasitology Research, 116(6), 1773-1779. doi: 10.1007/s00436-017-5464-4

Journal - Research Article

Friesen, O. C., Poulin, R., & Lagrue, C. (2017). Differential impacts of shared parasites on fitness components among competing hosts. Ecology & Evolution, 7(13), 4682-4693. doi: 10.1002/ece3.3062

Journal - Research Article

Galipaud, M., Bollache, L., & Lagrue, C. (2017). Variations in infection levels and parasite-induced mortality among sympatric cryptic lineages of native amphipods and a congeneric invasive species: Are native hosts always losing? International Journal for Parasitology: Parasites & Wildlife, 6(3), 439-447. doi: 10.1016/j.ijppaw.2017.04.005

Journal - Research Article

Lagrue, C. (2017). Impacts of crustacean invasions on parasite dynamics in aquatic ecosystems: A plea for parasite-focused studies. International Journal for Parasitology: Parasites & Wildlife, 6(3), 364-374. doi: 10.1016/j.ijppaw.2017.03.008

Journal - Research Article

Lagrue, C., Rinnevalli, R., & Poulin, R. (2017). Smelling the future: Subtle life-history adjustments in response to environmental conditions and perceived transmission opportunities in a trematode. Parasitology, 144(4), 464-474. doi: 10.1017/S003118201600192X

Journal - Research Article

Cirtwell, A. R., Stouffer, D. B., Poulin, R., & Lagrue, C. (2016). Are parasite richness and abundance linked to prey species richness and individual feeding preferences in fish hosts? Parasitology, 143(1), 75-86. doi: 10.1017/S003118201500150X

Journal - Research Article

Lagrue, C., & Poulin, R. (2016). The scaling of parasite biomass with host biomass in lake ecosystems: Are parasites limited by host resources? Ecography, 39(6), 507-514. doi: 10.1111/ecog.01720

Journal - Research Article

Lagrue, C., Heaphy, K., Presswell, B., & Poulin, R. (2016). Strong association between parasitism and phenotypic variation in a supralittoral amphipod. Marine Ecology Progress Series, 553, 111-123. doi: 10.3354/meps11752

Journal - Research Article

Lagrue, C., Joannes, A., Poulin, R., & Blasco-Costa, I. (2016). Genetic structure and host–parasite co-divergence: Evidence for trait-specific local adaptation. Biological Journal of the Linnean Society, 118, 344-358. doi: 10.1111/bij.12722

Journal - Research Article

Maceda-Veiga, A., Green, A. J., Poulin, R., & Lagrue, C. (2016). Body condition peaks at intermediate parasite loads in the common bully Gobiomorphus cotidianus. PLoS ONE, 11(12), e0168992. doi: 10.1371/journal.pone.0168992

Journal - Research Article

Presswell, B., & Lagrue, C. (2016). Assessing parasite infections from avian faecal samples: The old methods are still the best. Notornis, 63(1), 32-36.

Journal - Research Article

Galipaud, M., Bollache, L., Wattier, R., Dubreuil, C., Dechaume-Moncharmont, F.-X., & Lagrue, C. (2015). Overestimation of the strength of size-assortative pairing in taxa with cryptic diversity: A case of Simpson's paradox. Animal Behaviour, 102, 217-221. doi: 10.1016/j.anbehav.2015.01.032

Journal - Research Article

Galipaud, M., Gauthey, Z., Turlin, J., Bollache, L., & Lagrue, C. (2015). Mate choice and male–male competition among morphologically cryptic but genetically divergent amphipod lineages. Behavioral Ecology & Sociobiology, 69(12), 1907-1916. doi: 10.1007/s00265-015-2003-0

Journal - Research Article

Lagrue, C., & Poulin, R. (2015). Bottom-up regulation of parasite population densities in freshwater ecosystems. Oikos, 124(12), 1639-1647. doi: 10.1111/oik.02164

Journal - Research Article

Lagrue, C., & Poulin, R. (2015). Local diversity reduces infection risk across multiple freshwater host-parasite associations. Freshwater Biology, 60(11), 2445-2454. doi: 10.1111/fwb.12677

Journal - Research Article

Lagrue, C., & Poulin, R. (2015). Measuring fish body condition with or without parasites: Does it matter? Journal of Fish Biology, 87(4), 836-847. doi: 10.1111/jfb.12749

Journal - Research Article

Lagrue, C., & Poulin, R. (2015). Spatial covariation of local abundance among different parasite species: The effect of shared hosts. Parasitology Research, 114(10), 3637-3643. doi: 10.1007/s00436-015-4590-0

Journal - Research Article

Lagrue, C., Besson, A. A., & Lecerf, A. (2015). Interspecific differences in antipredator strategies determine the strength of non-consumptive predator effects on stream detritivores. Oikos, 124, 1589-1596. doi: 10.1111/oik.02272

Journal - Research Article

Lagrue, C., Poulin, R., & Cohen, J. E. (2015). Parasitism alters three power laws of scaling in a metazoan community: Taylor's law, density-mass allometry, and variance-mass allometry. PNAS, 112(6), 1791-1796. doi: 10.1073/pnas.1422475112

Journal - Research Article

Poulin, R., & Lagrue, C. (2015). The ups and downs of life: Population expansion and bottlenecks of helminth parasites through their complex life cycle. Parasitology, 142(6), 791-799. doi: 10.1017/S0031182014001917

Journal - Research Article

Dunoyer, L., Dijoux, L., Bollache, L., & Lagrue, C. (2014). Effects of crayfish on leaf litter breakdown and shredder prey: Are native and introduced species functionally redundant? Biological Invasions, 16(7), 1545-1555. doi: 10.1007/s10530-013-0590-0

Journal - Research Article

Joannes, A., Lagrue, C., Poulin, R., & Beltran-Bech, S. (2014). Effects of genetic similarity on the life-history strategy of co-infecting trematodes: Are parasites capable of intrahost kin recognition? Journal of Evolutionary Biology, 27(8), 1623-1630. doi: 10.1111/jeb.12413

Journal - Research Article

Lagrue, C., Podgorniak, T., Lecerf, A., & Bollache, L. (2014). An invasive species may be better than none: Invasive signal and native noble crayfish have similar community effects. Freshwater Biology, 59(9), 1982-1995. doi: 10.1111/fwb.12401

Journal - Research Article

Lagrue, C., Wattier, R., Galipaud, M., Gauthey, Z., Rullmann, J.-P., Dubreuil, C., … Bollache, L. (2014). Confrontation of cryptic diversity and mate discrimination within Gammarus pulex and Gammarus fossarum species complexes. Freshwater Biology, 59(12), 2555-2570. doi: 10.1111/fwb.12453

Journal - Research Article

Daniels, R. R., Beltran, S., Poulin, R., & Lagrue, C. (2013). Do parasites adopt different strategies in different intermediate hosts? Host size, not host species, influences Coitocaecum parvum (Trematoda) life history strategy, size and egg production. Parasitology, 140(2), 275-283. doi: 10.1017/s0031182012001564

Journal - Research Article

Lagrue, C., Güvenatam, A., & Bollache, L. (2013). Manipulative parasites may not alter intermediate host distribution but still enhance their transmission: Field evidence for increased vulnerability to definitive hosts and non-host predator avoidance. Parasitology, 140(2), 258-265. doi: 10.1017/s0031182012001552

Journal - Research Article

Dianne, L., Bollache, L., Lagrue, C., Franceschi, N., & Rigaud, T. (2012). Larval size in acanthocephalan parasites: Influence of intraspecific competition and effects on intermediate host behavioural changes. Parasites & Vectors, 5, 166. doi: 10.1186/1756-3305-5-166

Journal - Research Article

Lecerf, A., Baudoin, J.-M., Besson, A. A., Lamothe, S., & Lagrue, C. (2012). Is smaller necessarily better? Effects of small-scale forest harvesting on stream ecosystems. International Journal of Limnology, 48(4), 401-409. doi: 10.1051/limn/2012028

Journal - Research Article

Lagrue, C., Azemar, F., Besson, A., Lamothe, S., & Lecerf, A. (2011). Novel ligature methods for studying sublethal effects of sit-and-wait predators: Test using Cordulegaster Boltonii (Donovan, 1807) larvae (Anisoptera: Cordulegastridae). Odonatologica, 40(2), 95-103.

Journal - Research Article

Lagrue, C., Kaldonski, N., Motreuil, S., Lefèvre, T., Blatter, O., Giraud, P., & Bollache, L. (2011). Interspecific differences in drift behaviour between the native Gammarus pulex and the exotic Gammarus roeseli and possible implications for the invader’s success. Biological Invasions, 13, 1409-1421. doi: 10.1007/s10530-010-9899-0

Journal - Research Article

Lagrue, C., Kelly, D. W., Hicks, A., & Poulin, R. (2011). Factors influencing infection patterns of trophically transmitted parasites among a fish community: Host diet, host—parasite compatibility or both? Journal of Fish Biology, 79(2), 466-485. doi: 10.1111/j.1095-8649.2011.03041.x

Journal - Research Article

Lagrue, C., Kominoski, J. S., Danger, M., Baudoin, J.-M., Lamothe, S., Lambrigot, D., & Lecerf, A. (2011). Experimental shading alters leaf litter breakdown in streams of contrasting riparian canopy cover. Freshwater Biology, 56, 2059-2069. doi: 10.1111/j.1365-2427.2011.02637.x

Journal - Research Article

Lagrue, C., & Poulin, R. (2010). Manipulative parasites in the world of veterinary science: Implications for epidemiology and pathology. Veterinary Journal, 184(1), 9-13. doi: 10.1016/j.tvjl.2009.01.015

Journal - Research Article

Luque, J. L., Vieira, F. M., Herrmann, K., King, T. M., Poulin, R., & Lagrue, C. (2010). New evidence on a cold case: Trophic transmission, distribution and host-specificity in Hedruris spinigera (Nematoda: Hedruridae). Folia Parasitologica, 57(3), 223-231.

Journal - Research Article

Lagrue, C., & Poulin, R. (2009). Heritability and short-term effects of inbreeding in the progenetic trematode Coitocaecum parvum: Is there a need for the definitive host? Parasitology, 136(2), 231-240. doi: 10.1017/S0031182008005325

Journal - Research Article

Lagrue, C., & Poulin, R. (2009). Life cycle abbreviation in trematode parasites and the developmental time hypothesis: Is the clock ticking? Journal of Evolutionary Biology, 22(8), 1727-1738. doi: 10.1111/j.1420-9101.2009.01787.x

Journal - Research Article

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