A new approach to assessing the space use behavior of macroinvertebrates by automated video tracking

Shokri, Milad; Cozzoli, Francesco; Ciotti, Mario; Gjoni, Vojsava; Marrocco, Vanessa; Vignes, Fabio; Basset, Alberto

doi:10.1002/ece3.7129

Cited by 14 publications

(16 citation statements)

References 91 publications

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“…1), is a widely distributed crustacean species found in European transitional and coastal waters, reaching a maximal length of 19 mm at adult size (Tillin and White 2017). They disperse over short distances by relatively fast swimming movements (up to 10 cm s −1 ) that are often interrupted by rest and feeding breaks of a few minutes (Shokri et al 2021). G. insensibilis feed mainly by grazing microscopic fungi growing on submerged decaying plant litter (Nelson 2011).…”

Section: Model Organismmentioning

confidence: 99%

“…However, they exploit less palatable microorganisms or even the leaves matrix when their preferred food is in short supply (Rossi 1985;Graça et al 1993;Aßmann et al 2011;Mancinelli 2012). While feeding, G. insensibilis quickly scroll the surface of leaves for highly valuable resources (Basset 1992;Shokri et al 2021).…”

Section: Model Organismmentioning

confidence: 99%

“…The mazes were kept in an isolated and temperature-controlled room (18 ± 0.3 °C) to prevent external disturbance that could interfere with the behaviour of the specimens. See Shokri et al (2021) for further details.…”

Section: Experimental Mazementioning

confidence: 99%

“…To test these hypotheses, we performed microcosm experiments using the aquatic amphipod Gammarus insensibilis (Stock, 1966) as a model organism. Thanks to a novel methodological approach (Shokri et al 2021), we were able to accurately describe the patch use behaviour of G. insensibilis specimens in a range of sizes (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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The size dependency of foraging behaviour: an empirical test performed on aquatic amphipods

et al. 2022

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The behavioural choices made by foragers regarding the use of resource patches have a direct influence on the energy balance of the individual. Given that several individual traits linked to the acquisition of spatially distributed resources increase with body size (e.g., energy requirements, resource ingestion rates, and movement capacity), it is reasonable to expect size dependencies in overall foraging behaviour. In this study, we tested how body size influences the number, duration, and frequency of foraging episodes in heterogeneous resource patches. To this end, we performed microcosm experiments using the aquatic amphipod Gammarus insensibilis as a model organism. An experimental maze was used to simulate a habitat characterised by resource-rich, resource-poor, and empty patches under controlled conditions. The patch use behaviour of 40 differently sized specimens foraging alone in the experimental maze was monitored via an advanced camera setup. Overall, we observed that individual body size exerted a major influence on the use of resource patches over time. Larger individuals had stronger preference for the resource-rich patches initially and visited them more frequently than smaller individuals, but for shorter periods of time. However, larger individuals subsequently decreased their use of resource-rich patches in favour of resource-poor patches, while smaller individuals continued to prefer resource-rich patches for the whole experimental time. With body size being a key organismal trait, our observations support the general understanding of foraging behaviours related to preference, patch use, and abandonment.

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Section: Model Organismmentioning

confidence: 99%

Section: Model Organismmentioning

confidence: 99%

Section: Experimental Mazementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The size dependency of foraging behaviour: an empirical test performed on aquatic amphipods

et al. 2022

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“…Animals determine behaviors regarding their physiological needs and reproductive goals (Cozzoli et al, 2018(Cozzoli et al, , 2020Prato et al, 2006;Shokri et al, 2019Shokri et al, , 2021Shuhaimi & Pascoe, 2001), once they reach sexual maturity, new dimensions would be added to their internal state and hence, the organism foraging decisions (Becker et al, 2012;Cruz-Rivera et al, 2017;Mowrey & Portman, 2012;Ward, 1985Ward, , 1986. Sex-related differences were shown in G. aequicauda during its feeding as a grazer on two green algae species (Cruz-Rivera et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The behavior of Gammarus aequicauda (crustacea, amphipoda) during predation on chironomid larvae: Sex differences and changes in precopulatory mate‐guarding state

2021

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The foraging behavior determines the diet size influencing the growth and reproduction of a predator and its prey populations. Amphipods play a key role in various aquatic ecosystems. Gammarus aequicauda is an abundant widespread omnivorous species and the only known amphipod species of hypersaline waters. Its predation can suppress the populations of planktonic and benthic invertebrates. Males of G. aequicauda actively eat chironomid larvae but there is no data on predatory females. Experiments were conducted to study sex‐related differences in feeding behavior including during precopulatory mate guarding (PCMG). There were significant sex differences in feeding characteristics. For females, calculations showed that maximum consumption could be 3–4 chironomid larvae per day and for males about 9–10 larvae per day. During PCMG, males did not feed and females fed as efficiently as single females. Males transported females and alone carrying the energetic costs of swimming during PCMG. Less expenditure of energy on swimming means more energy for reproduction for females. This allows more energy‐efficient use of food resources and increases the reproductive success of the population. There are currently two alternative views on PCMG among crustaceans. 1. It is a sexual conflict between males and females serving as a male adaptive strategy to achieve a female during strong male competition, while females bear many costs during the long guarding period. 2. There is also the opposite view that pairs get energetic benefits from long PCMG. Obtained data suggest that PCMG is likely to be intersexual cooperation and not intersexual conflict.

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The relative importance of metabolic rate and body size to space use behavior in aquatic invertebrates

Shokri,

Marrocco,

Cozzoli

et al. 2024

Ecology and Evolution

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Elucidating the underlying mechanisms behind variations of animal space and resource use is crucial to pinpoint relevant ecological phenomena. Organism's traits related to its energy requirements might be central in explaining behavioral variation, as the ultimate goal of a forager is to fulfill its energy requirements. However, it has remained poorly understood how energy requirements and behavioral patterns are functionally connected. Here we aimed to assess how body mass and standard metabolic rate (SMR) influence behavioral patterns in terms of cumulative space use and time spent in an experimental patchy environment, both within species and among individuals irrespective of species identity. We measured the behavioral patterns and SMR of two invertebrate species, that is, amphipod Gammarus insensibilis, and isopod Lekanesphaera monodi, individually across a range of body masses. We found that species of G. insensibilis have higher SMR level, in addition to cumulatively exploring a larger space than L. monodi. Cumulative space use scaled allometrically with body mass, and it scaled isometrically with SMR in both species. While time spent similarly in both species was characterized by negative body mass and SMR dependence, it was observed that L. monodi individuals tended to stay longer in resource patches compared to G. insensibilis individuals. Our results further showed that within species, body mass and metabolic rate explained a similar amount of variation in behavior modes. However, among individuals, regardless of species identity, SMR had stronger predictive power for behavioral modes compared to body mass. This suggests that SMR might offer a more generalized and holistic description of behavioral patterns that extend beyond species identity. Our study on the metabolic and body mass scaling of space and resource use behavior sheds light on higher‐order ecological processes such as species' competitive coexistence along the spatial and trophic dimensions.

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A new approach to assessing the space use behavior of macroinvertebrates by automated video tracking

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 14 publications

References 91 publications

The size dependency of foraging behaviour: an empirical test performed on aquatic amphipods

The size dependency of foraging behaviour: an empirical test performed on aquatic amphipods

The behavior of Gammarus aequicauda (crustacea, amphipoda) during predation on chironomid larvae: Sex differences and changes in precopulatory mate‐guarding state

The relative importance of metabolic rate and body size to space use behavior in aquatic invertebrates

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