Influence of behavioral plasticity and foraging strategy on starvation tolerance of planktonic copepods

Mark Wejlemann Holm, Rocio Rodriguez-Torres, Benni Winding Hansen, Rodrigo Almeda

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Starvation is considered a major cause of non-predatory mortality in zooplankton. Planktonic copepods display behavioral plasticity and small-scale behaviors associated with different foraging strategies that can affect starvation tolerance. However, little is still known about the influence of behavior on starvation tolerance in zooplankton. Here, we experimentally investigated behavioral changes and survival of planktonic copepods (adults and nauplii) with different foraging strategies under prolonged starvation. The behavioral response to starvation varied depending on the foraging strategy. The strict ambusher Oithona nana showed a low and, almost constant, motile activity (relocation jumps, <4% of the time) whereas the feeding-current feeder Temora longicornis swam for most of the time (~100%) without reducing their activity under prolonged starvation. The switching-behavior feeder Acartia tonsa move actively in the presence of food but had a low motile activity in absence of food (~12%) and decreased its motile activity during starvation (from ~12% to 3%). The observed behavioral responses to the absence of food can be broadly classified in terms of motility as: (i) “sit-and-wait” strategy for copepods with low motile activity under starvation (mostly relocation jumps) and (ii) “searching” strategy for copepods with high motility activity (swimming/cruising) under starvation. Median survival time in absence of food increased with increasing copepod body weight and it was ~1.75 fold lower in active feeders (“searching” strategy under starvation) than in ambush and switching-behavior feeders (“sit-and-wait” strategy under starvation). Thus, copepods with foraging strategies linked to a low motility (ambush feeders) and/or with behavioral plasticity to reduce motility in absence of food (switching -behavior feeders) would cope better with resource limitation/fluctuation than some active feeders. We demonstrate that behavioral plasticity and motile activity associated with foraging strategy significantly influences starvation tolerance in planktonic copepods. These results help to quantify the main trade-offs (gain vs costs) of the main zooplankton foraging strategies and emphasize that behavior is a key trait to understand the distribution of planktonic copepods in marine environments depending on trophic conditions.
OriginalsprogEngelsk
TidsskriftJournal of Experimental Marine Biology and Ecology
Vol/bind2019
Udgave nummer511
Sider (fra-til)19-27
Antal sider9
ISSN0022-0981
DOI
StatusUdgivet - 2019

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    title = "Influence of behavioral plasticity and foraging strategy on starvation tolerance of planktonic copepods",
    abstract = "Starvation is considered a major cause of non-predatory mortality in zooplankton. Planktonic copepods display behavioral plasticity and small-scale behaviors associated with different foraging strategies that can affect starvation tolerance. However, little is still known about the influence of behavior on starvation tolerance in zooplankton. Here, we experimentally investigated behavioral changes and survival of planktonic copepods (adults and nauplii) with different foraging strategies under prolonged starvation. The behavioral response to starvation varied depending on the foraging strategy. The strict ambusher Oithona nana showed a low and, almost constant, motile activity (relocation jumps, <4{\%} of the time) whereas the feeding-current feeder Temora longicornis swam for most of the time (~100{\%}) without reducing their activity under prolonged starvation. The switching-behavior feeder Acartia tonsa move actively in the presence of food but had a low motile activity in absence of food (~12{\%}) and decreased its motile activity during starvation (from ~12{\%} to 3{\%}). The observed behavioral responses to the absence of food can be broadly classified in terms of motility as: (i) “sit-and-wait” strategy for copepods with low motile activity under starvation (mostly relocation jumps) and (ii) “searching” strategy for copepods with high motility activity (swimming/cruising) under starvation. Median survival time in absence of food increased with increasing copepod body weight and it was ~1.75 fold lower in active feeders (“searching” strategy under starvation) than in ambush and switching-behavior feeders (“sit-and-wait” strategy under starvation). Thus, copepods with foraging strategies linked to a low motility (ambush feeders) and/or with behavioral plasticity to reduce motility in absence of food (switching -behavior feeders) would cope better with resource limitation/fluctuation than some active feeders. We demonstrate that behavioral plasticity and motile activity associated with foraging strategy significantly influences starvation tolerance in planktonic copepods. These results help to quantify the main trade-offs (gain vs costs) of the main zooplankton foraging strategies and emphasize that behavior is a key trait to understand the distribution of planktonic copepods in marine environments depending on trophic conditions.",
    keywords = "Zooplankton, Behavior, Starvation tolerance, Foraging strategies, Motile activity, Copepods",
    author = "Holm, {Mark Wejlemann} and Rocio Rodriguez-Torres and Hansen, {Benni Winding} and Rodrigo Almeda",
    year = "2019",
    doi = "10.1016/j.jembe.2018.11.002",
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    pages = "19--27",
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    Influence of behavioral plasticity and foraging strategy on starvation tolerance of planktonic copepods. / Holm, Mark Wejlemann; Rodriguez-Torres, Rocio; Hansen, Benni Winding; Almeda, Rodrigo.

    I: Journal of Experimental Marine Biology and Ecology, Bind 2019, Nr. 511, 2019, s. 19-27.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Influence of behavioral plasticity and foraging strategy on starvation tolerance of planktonic copepods

    AU - Holm, Mark Wejlemann

    AU - Rodriguez-Torres, Rocio

    AU - Hansen, Benni Winding

    AU - Almeda, Rodrigo

    PY - 2019

    Y1 - 2019

    N2 - Starvation is considered a major cause of non-predatory mortality in zooplankton. Planktonic copepods display behavioral plasticity and small-scale behaviors associated with different foraging strategies that can affect starvation tolerance. However, little is still known about the influence of behavior on starvation tolerance in zooplankton. Here, we experimentally investigated behavioral changes and survival of planktonic copepods (adults and nauplii) with different foraging strategies under prolonged starvation. The behavioral response to starvation varied depending on the foraging strategy. The strict ambusher Oithona nana showed a low and, almost constant, motile activity (relocation jumps, <4% of the time) whereas the feeding-current feeder Temora longicornis swam for most of the time (~100%) without reducing their activity under prolonged starvation. The switching-behavior feeder Acartia tonsa move actively in the presence of food but had a low motile activity in absence of food (~12%) and decreased its motile activity during starvation (from ~12% to 3%). The observed behavioral responses to the absence of food can be broadly classified in terms of motility as: (i) “sit-and-wait” strategy for copepods with low motile activity under starvation (mostly relocation jumps) and (ii) “searching” strategy for copepods with high motility activity (swimming/cruising) under starvation. Median survival time in absence of food increased with increasing copepod body weight and it was ~1.75 fold lower in active feeders (“searching” strategy under starvation) than in ambush and switching-behavior feeders (“sit-and-wait” strategy under starvation). Thus, copepods with foraging strategies linked to a low motility (ambush feeders) and/or with behavioral plasticity to reduce motility in absence of food (switching -behavior feeders) would cope better with resource limitation/fluctuation than some active feeders. We demonstrate that behavioral plasticity and motile activity associated with foraging strategy significantly influences starvation tolerance in planktonic copepods. These results help to quantify the main trade-offs (gain vs costs) of the main zooplankton foraging strategies and emphasize that behavior is a key trait to understand the distribution of planktonic copepods in marine environments depending on trophic conditions.

    AB - Starvation is considered a major cause of non-predatory mortality in zooplankton. Planktonic copepods display behavioral plasticity and small-scale behaviors associated with different foraging strategies that can affect starvation tolerance. However, little is still known about the influence of behavior on starvation tolerance in zooplankton. Here, we experimentally investigated behavioral changes and survival of planktonic copepods (adults and nauplii) with different foraging strategies under prolonged starvation. The behavioral response to starvation varied depending on the foraging strategy. The strict ambusher Oithona nana showed a low and, almost constant, motile activity (relocation jumps, <4% of the time) whereas the feeding-current feeder Temora longicornis swam for most of the time (~100%) without reducing their activity under prolonged starvation. The switching-behavior feeder Acartia tonsa move actively in the presence of food but had a low motile activity in absence of food (~12%) and decreased its motile activity during starvation (from ~12% to 3%). The observed behavioral responses to the absence of food can be broadly classified in terms of motility as: (i) “sit-and-wait” strategy for copepods with low motile activity under starvation (mostly relocation jumps) and (ii) “searching” strategy for copepods with high motility activity (swimming/cruising) under starvation. Median survival time in absence of food increased with increasing copepod body weight and it was ~1.75 fold lower in active feeders (“searching” strategy under starvation) than in ambush and switching-behavior feeders (“sit-and-wait” strategy under starvation). Thus, copepods with foraging strategies linked to a low motility (ambush feeders) and/or with behavioral plasticity to reduce motility in absence of food (switching -behavior feeders) would cope better with resource limitation/fluctuation than some active feeders. We demonstrate that behavioral plasticity and motile activity associated with foraging strategy significantly influences starvation tolerance in planktonic copepods. These results help to quantify the main trade-offs (gain vs costs) of the main zooplankton foraging strategies and emphasize that behavior is a key trait to understand the distribution of planktonic copepods in marine environments depending on trophic conditions.

    KW - Zooplankton

    KW - Behavior

    KW - Starvation tolerance

    KW - Foraging strategies

    KW - Motile activity

    KW - Copepods

    U2 - 10.1016/j.jembe.2018.11.002

    DO - 10.1016/j.jembe.2018.11.002

    M3 - Journal article

    VL - 2019

    SP - 19

    EP - 27

    JO - Journal of Experimental Marine Biology and Ecology

    JF - Journal of Experimental Marine Biology and Ecology

    SN - 0022-0981

    IS - 511

    ER -