Predation

Jeschke, Jonathan M.; Laforsch, Christian; Diel, Patricia; Diller, J.; Horstmann, Martin; Tollrian, Ralph

doi:10.1016/b978-0-12-819166-8.00016-5

Cited by 5 publications

(5 citation statements)

References 87 publications

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“…The shape of these curves depends on the prey density, the predator success rate, and the handling time per prey item. In turn, the success rate depends on the encounter rates, and the handling time refers to the sum of the time needed to capture and consume a prey item [ 25 , 71 ]. In consequence, the time needed to process a plastic particle may be different from that wasted in a true prey, causing false satiety in the predator [ 72 , 73 ] and thus, altering the population dynamics of both predators and prey.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, turbulence can affect the different stages of the predatory cycle (i.e. search, encounter, detection, attack, and capture; [ 25 ]); it enhances encounter rates between predators and prey, but it also decreases the period of contact between them [ 22 ]. As passive buoyant particles in the water, microplastics can be mistaken for prey [ 8 ], but the interaction is scarcely known.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of encounter rates between zooplankton organisms and microplastics in a tropical estuary

Sanvicente-Añorve,

Alatorre-Mendieta,

Sánchez-Campos

et al. 2023

PLoS ONE

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Coastal estuarine systems may hold a large number of microplastic particles, which predators often mistake for prey. This study estimated the encounter rates between microplastics (alleged prey) and zooplankton having different feeding modes, trophic positions, swimming velocities, and perception distances, under calm and turbulent conditions, and during two seasons. Surface water samples were taken at 10/12 sites of the Sontecomapan lagoon, southern Gulf of Mexico, to quantify microplastic concentration. Zooplankton organisms considered were copepods, chaetognaths, and luciferids, common organisms in the lagoon. In June, at surface waters and during calm conditions, mean encounter rates were 1.5, 2450, and 980 particles per individual per hour, that is, for copepods, chaetognaths, and luciferids, respectively. When the wind blows (0.8 m s-1) encounter rates were 1.2, 1.4, and 2.6 times higher than in calm conditions. In October, mean encounter rates under calm conditions were 0.2, 355, and 142 particles per individual per hour, for copepods, chaetognaths, and luciferids; these values increase 1.3, 1.6, and 3.3 times when the wind blows (1.12 m s-1). The major number of encounters in June was due to a higher concentration of microplastics, despite the lower turbulent velocity. Regarding their trophic position, we propose that secondary consumers (chaetognaths and luciferids) are more affected because they could eat microplastics via contaminated prey or accidentally ingest them owing to confusion in the motion signals, especially under turbulent conditions. Another consequence of encounters could be the entanglement of microplastics in the body of the animals, especially in those with complex morphology, such as crustaceans. Encounters between zooplankton and microplastics do not always result in ingestion or entanglement, but the encounters are the first step in the case of occurrence.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of encounter rates between zooplankton organisms and microplastics in a tropical estuary

Sanvicente-Añorve,

Alatorre-Mendieta,

Sánchez-Campos

et al. 2023

PLoS ONE

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“…Pada tipe ini terdapat waktu penanganan mangsa (Th) dengan perilaku untuk membunuh dan memangsa mangsa (Papanikolaou et al, 2020), kemungkinan terjadi pengistirahatan sebelum bergerak untuk mencari mangsa yang lebih banyak lagi. Model tipe III menggambarkan bentuk grafik secara sigmoid, dengan pemangsaan secara lambat di awal populasi kemudian meningkat dengan cepat pada tingkat populasi yang tinggi (Dunn & Hovel, 2020), selanjutnya pemangsaan terjadi secara lambat kembali pada tingkat populasi mangsa mendekati kejenuhan (Jeschke et al, 2022).…”

Section: Pendahuluanunclassified

KAPASITAS POTENSI PARASITISME Trichogramma sp. (Hymenoptera: Trichogrammatidae) TERHADAP Corcyra sp.

Sumah¹,

Kusumadinata²

2023

Biosilampari

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Parasitism research Trichogramma sp. (Hymenoptera: Trichogrammatidae) has been carried out with the aim of studying the functional response of the parasitoid Trichogramma sp. Functional response is one measure to determine the effectiveness of a predator or parasitoid as an agent in biological control, so that it can express a change in the number of preys attacked by individual predators. Temperature is one of the most important host-parasitoid interactions in functional responses. The method used in the parasitoid parasitism Trichogramma sp. on the host Corcyra sp. using four levels of egg density Corcyra sp. with two different temperature treatments (27OC and room temperature). The results show the functional response model of the parasitoid Trichogramma sp. against its host Corcyra sp. described in the type I model. Parasitization level of Trichogramma sp. showed the same results for both temperature treatments, however, it also shows differences in the speed of predation. It also showed linearity between the parasitoids Trichogramma sp. with the host Corcyra sp. Parasitism rates are still increasing, along with an increase in host density. This research can be a starting point to improve the control of Corcyra sp. using the parasitoid Trichogramma sp. in the field.

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“…(HELCOM, 2018). Predator consumption rates are governed by success rate and handling time, and together with prey densities, they determine the functional response of predators as higher prey densities generally lead to increased consumption rates until a threshold is reached (Jeschke et al, 2022). Further, as generalist predators have broad dietary niches (Gerking, 1994), they can adapt their feeding strategy based on prey availability (Laske et al, 2018) and temporarily specialize on abundant prey (Amundsen, 1995).…”

Section: Ethics and Permitsmentioning

confidence: 99%

Causes and consequences of the round goby invasion in the Baltic Sea and beyond

Wallin Kihlberg

2023

Acta Universitatis Agriculturae Sueciae

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Species invasions have increased rapidly over time and pose negative effects on ecosystems and societies worldwide. The round goby, one of the most widespread invasive fishes in the northern hemisphere, established in the Baltic Sea in 1990. My results show that the round goby, in contrast to most native species in the coastal fish community, exhibits territorial behaviour and parental care, which may have given it a competitive advantage and facilitated its establishment in the Baltic Sea. I found the major diet components of the round goby to be macroinvertebrates, but DNA metabarcoding revealed feeding also on several fish species, likely in their early life stages. Further, the round goby constituted prey for cod, perch and pike. When round goby was abundant in the environment, the reliance on fish prey increased for both round goby and its predators. As a potential consequence of round goby expansion to freshwater, I further studied round goby interactions with spawning salmon. Presence of round goby delayed salmon spawning, and male and female salmon resided closer together in the presence of higher densities of round goby compared to lower densities, which could be interpreted as a protective behaviour. In order to minimise the negative effects of the round goby in and around the Baltic Sea, I recommend management measures to reduce its abundances and prevent further spread, for example by strengthening native coastal predatory fish populations, developing a round goby fishery and developing a system for early detection and eradication of the round goby in rivers and streams.

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Predation

Cited by 5 publications

References 87 publications

Simulation of encounter rates between zooplankton organisms and microplastics in a tropical estuary

Simulation of encounter rates between zooplankton organisms and microplastics in a tropical estuary

KAPASITAS POTENSI PARASITISME Trichogramma sp. (Hymenoptera: Trichogrammatidae) TERHADAP Corcyra sp.

Causes and consequences of the round goby invasion in the Baltic Sea and beyond

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