Demography and feeding behavior of Stenostomum leucops (Dugés, 1828)

Núñez-Ortiz, Alma R.; Sarma, S. S. S.

doi:10.4081/jlimnol.2016.1369

Cited by 6 publications

(2 citation statements)

References 49 publications

(48 reference statements)

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“…In nature, small prey including protozoans and rotifers are probably consumed more than cladocerans. Núñez-Ortiz et al [ 38 ] showed a preference for rotifers in the small Stenostomum leucops as well, with a functional response close to that here found for M . craci .…”

Section: Discussionsupporting

confidence: 86%

Predation and reproductive performance in two pelagic typhloplanid turbellarians

2018

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We investigated feeding and reproductive performance of coexisting pelagic turbellarians from experiments on predation rates of Mesostoma ehrenbergii and M. craci as a function of food (Daphnia similis, three levels) and temperature (4 levels) during 10 days. Flatworms were collected from the pelagic of a subtropical lake in Brazil. Growth was more rapid at higher temperatures: more prey were consumed, and more eggs produced. M. craci and particularly M. ehrenbergii fitted a linear mixed-effects model and showed a type II functional response. M. craci was the more stenothermic of the two. Intrageneric predation also occurred: M. ehrenbergii fed on M. craci, but not vice versa. After a first clutch of subitaneous eggs, M. ehrenbergii produced resting eggs only. In M. craci an intermediate type of eggs hatched some time after release, survived passage through the gut of M. ehrenbergii, but did not resist drying. By primarily selecting cladoceran prey, M. ehrenbergii can make coexistence of both flatworms possible. As population density of M. ehrenbergii increases, it turns to producing resting and non-viable subitaneous eggs, thus limiting its population size. In nature, these processes structure the zooplankton community, while avoiding extinction of prey and predator.

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Section: Discussionsupporting

confidence: 86%

Predation and reproductive performance in two pelagic typhloplanid turbellarians

2018

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“…This supports our hypothesis that a few environmental variables (pH, dissolved oxygen) would be good predictors of the presence of Collothecidae in Lake Xochimilco. Biotic interactions were not considered here, but some small periphytic metazoans such as amebas, turbellarians, snails, and predatory rotifers such as Acyclus , Aspelta , Asplanchnopus , Dicranophorus , and Eosphora may influence the population densities of sessile rotifers (Aloi & Brönmark, ; Han, Wang, Lin, & Dumont, ; Núñez‐Ortiz, Nandini, & Sarma, ; Sládeček, ). Some of these species are predatory, but they may also simply dislodge sessile rotifers from their substratum (e.g., snails).…”

Section: Discussionmentioning

confidence: 99%

Sessile rotifers (Rotifera) exhibit strong seasonality in a shallow, eutrophic Ramsar site in Mexico

Jiménez‐Santos

Sarma

Wallace

2019

Invertebrate Biology

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To better understand the sessile rotifer community of a shallow, eutrophic lake, we monitored over a 1‐year period the monthly changes in the density and diversity of rotifers on the roots of the common water hyacinth, Eichhornia crassipes, which served as a representative hydrophyte. Selected physical and chemical parameters of the water were also determined. Mean annual density of all sessile species was 630 individuals per ml. Species of Collothecacea (n = 7) were most abundant. Of the 12 species of Flosculariaceae (Flosculariidae), Sinantherina socialis occurred seasonally, while Ptygura beauchampi was most common across all seasons. The Shannon–Wiener diversity index was highest (H′ = 2.8) in April, but decreased in January (H′ = 1.3). Applying the concept of the guild ratio (functional‐based analysis) we found that raptorial species (Collothecacea) were dominant over most of the year (June–February), while microphagous Flosculariidae were dominant during the warm, drier season (March–May). BEST (optimal matching of biota to environment, including stepwise search) analysis and canonical correspondence revealed that temperature, dissolved oxygen, pH, turbidity, and transparency strongly influenced sessile rotifer dynamics. We also found significant correlations between the density of some species and physicochemical variables. These species included Collotheca ambigua, C. coronetta, C. ornata, C. campanulata, C. tenuilobata, and Stephanoceros millsii in the Collothecacea; and Beauchampia crucigere, Limnias melicerta, L. ceratophylli, Ptygura crystallina, P. melicerta, and Sinantherina ariprepes in the Flosculariidae. Our study shows that the communities of sessile rotifers were structured by abiotic factors and that the guild ratio is useful for understanding the relationship between sessile rotifers and their substrata.

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Temperature and prey morphology influence attack rate and handling time in a predator–prey interaction

Robertson

Hammill

2021

Hydrobiologia

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Demography and feeding behavior of Stenostomum leucops (Dugés, 1828)

Abstract: Freshwater

Cited by 6 publications

References 49 publications

Predation and reproductive performance in two pelagic typhloplanid turbellarians

Predation and reproductive performance in two pelagic typhloplanid turbellarians

Sessile rotifers (Rotifera) exhibit strong seasonality in a shallow, eutrophic Ramsar site in Mexico

Temperature and prey morphology influence attack rate and handling time in a predator–prey interaction

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