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Facilitation and interference among three predators affect their consumption of a stream-dwelling mayfly

Nilsson, Erika LU ; Hertonsson, Pia LU ; Stenberg, Marika LU ; Brodersen, Jakob LU ; Olsson, Karin LU ; Stenroth, Patrik LU ; Lakowitz, Thomas LU ; Brönmark, Christer LU ; Nyström, Per LU and McIntosh, A R (2006) In Freshwater Biology 51(8). p.1507-1514
Abstract
1. We experimentally tested if a multiplicative risk model accurately predicted the consumption of a common mayfly at risk of predation from three predator species in New Zealand streams. Deviations between model predictions and experimental observations were interpreted as indicators of ecologically important interactions between predators.

2. The predators included a drift-feeding fish [brown trout (T), Salmo trutta], a benthivorous fish [galaxiid (G), koaro, Galaxias brevipennis] and a benthic predatory stonefly (S; Stenoperla sp.) with Deleatidium sp. mayflies as prey. Eight treatments with all predator species combinations and a predator-free control were used. Experiments were performed in aquaria with cobbles as predator... (More)
1. We experimentally tested if a multiplicative risk model accurately predicted the consumption of a common mayfly at risk of predation from three predator species in New Zealand streams. Deviations between model predictions and experimental observations were interpreted as indicators of ecologically important interactions between predators.

2. The predators included a drift-feeding fish [brown trout (T), Salmo trutta], a benthivorous fish [galaxiid (G), koaro, Galaxias brevipennis] and a benthic predatory stonefly (S; Stenoperla sp.) with Deleatidium sp. mayflies as prey. Eight treatments with all predator species combinations and a predator-free control were used. Experiments were performed in aquaria with cobbles as predator refuges for mayflies and we measured the proportion of prey consumed after 6 h for both day and night trials.



3. Trout consumed a higher proportion of prey than other predators. For the two predator treatments we found less than expected prey consumption in the galaxiid + trout treatment (G + T) for both day and night trials, whereas a higher than expected proportion of prey was consumed during night time in the stonefly + trout (S + T) treatment.



4. The results indicate interference (G + T) and facilitation (S + T) between predators depending on predator identity and time of day. Thus, to make accurate predictions of interspecific interactions, it is necessary to consider the ecology of individual species and how differences influence the direction and magnitude of interactions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Freshwater Biology
volume
51
issue
8
pages
1507 - 1514
publisher
Wiley-Blackwell
external identifiers
  • wos:000239600400010
  • scopus:33746217081
ISSN
0046-5070
DOI
10.1111/j.1365-2427.2006.01581.x
language
English
LU publication?
yes
id
cafe1e65-a40a-46e5-8866-fb643b5d0440 (old id 162580)
date added to LUP
2007-06-28 14:46:43
date last changed
2019-02-20 07:51:32
@article{cafe1e65-a40a-46e5-8866-fb643b5d0440,
  abstract     = {1. We experimentally tested if a multiplicative risk model accurately predicted the consumption of a common mayfly at risk of predation from three predator species in New Zealand streams. Deviations between model predictions and experimental observations were interpreted as indicators of ecologically important interactions between predators. <br/><br>
2. The predators included a drift-feeding fish [brown trout (T), Salmo trutta], a benthivorous fish [galaxiid (G), koaro, Galaxias brevipennis] and a benthic predatory stonefly (S; Stenoperla sp.) with Deleatidium sp. mayflies as prey. Eight treatments with all predator species combinations and a predator-free control were used. Experiments were performed in aquaria with cobbles as predator refuges for mayflies and we measured the proportion of prey consumed after 6 h for both day and night trials.<br/><br>
<br/><br>
3. Trout consumed a higher proportion of prey than other predators. For the two predator treatments we found less than expected prey consumption in the galaxiid + trout treatment (G + T) for both day and night trials, whereas a higher than expected proportion of prey was consumed during night time in the stonefly + trout (S + T) treatment.<br/><br>
<br/><br>
4. The results indicate interference (G + T) and facilitation (S + T) between predators depending on predator identity and time of day. Thus, to make accurate predictions of interspecific interactions, it is necessary to consider the ecology of individual species and how differences influence the direction and magnitude of interactions.},
  author       = {Nilsson, Erika and Hertonsson, Pia and Stenberg, Marika and Brodersen, Jakob and Olsson, Karin and Stenroth, Patrik and Lakowitz, Thomas and Brönmark, Christer and Nyström, Per and McIntosh, A R},
  issn         = {0046-5070},
  language     = {eng},
  number       = {8},
  pages        = {1507--1514},
  publisher    = {Wiley-Blackwell},
  series       = {Freshwater Biology},
  title        = {Facilitation and interference among three predators affect their consumption of a stream-dwelling mayfly},
  url          = {http://dx.doi.org/10.1111/j.1365-2427.2006.01581.x},
  volume       = {51},
  year         = {2006},
}