Feeding niche preference of the mudsnail Peringia ulvae

2015 ◽  
Vol 66 (7) ◽  
pp. 573 ◽  
Author(s):  
Cristiano V. M. Araújo ◽  
Matilde Moreira-Santos ◽  
Joana Patrício ◽  
Irene Martins ◽  
Ignacio Moreno-Garrido ◽  
...  
Keyword(s):  
Food Source ◽  
Potential Role ◽  
Food Type ◽  
Macroalgal Blooms ◽  
Feeding Niche ◽  
Feeding Experiments ◽  
Mondego Estuary ◽  
Feeding Parameters ◽  
Potential Food ◽  
Preferential Feeding

The feeding behaviour of Peringia ulvae was studied with the aim of assessing its preferential feeding niche (habit) as well as its potential role in controlling or preventing the occurrence of macroalgal blooms. Both these aspects were studied in the Mondego estuary because of the clear long-lasting eutrophication process that favours the growth of two opportunistic macroalgae, Gracilaria spp. and Ulva spp., over the local beds of the macrophyte Zostera nolteii, which is another potential food source. All three species, both with and without periphyton, were used as a single food source in feeding experiments to assess different feeding parameters of the gastropod. Sediment with microphytobenthos was used together with the latter three species in feeding niche preference experiments. None of the food types provided were resistant to grazing. Higher levels of grazing occurred on Ulva spp. (apical parts) and Z. nolteii, both with periphyton. The presence of periphyton did not change grazing rates. When a choice between each food type was offered, the sediment was clearly the feeding niche preferred by the snails. As P. ulvae spent more time on the sediment (preferred feeding niche), the hypothesis that it has a role in preventing macroalgal blooms was not supported.

The Genus Chenopodium: A Potential Food Source

2013 ◽  
pp. 3-31
Author(s):  
Eulogio de la Cruz Torres ◽  
Guadalupe Palomino Hasbach ◽  
Juan Manuel García Andrade ◽  
Cristina Mapes Sánchez ◽  
Josefina González Jiménez ◽  
...  
Keyword(s):  
Food Source ◽  
Potential Food Source ◽  
Potential Food

Invertebrates as a Potential Food Source of Brown Bears on the Deosai Plateau, Northern Pakistan

2004 ◽  
Vol 8 (1) ◽  
pp. 13-19 ◽  
Author(s):  
O.B. Kok . ◽  
C.R. Haddad . ◽  
D.J. Van Niekerk . ◽  
H.J.B. Butler . ◽  
M.A. Nawaz .
Keyword(s):  
Food Source ◽  
Northern Pakistan ◽  
Brown Bears ◽  
Potential Food Source ◽  
Potential Food

Seed predation by birds shortly after a wildfire in a Corsican pine forest

2006 ◽  
Vol 15 (1) ◽  
pp. 81 ◽  
Author(s):  
Jean-Claude Thibault ◽  
Roger Prodon
Keyword(s):  
Seed Predation ◽  
Food Source ◽  
Pine Forest ◽  
Potential Food Source ◽  
Coal Tit ◽  
Large Numbers ◽  
Seed Eating ◽  
Parus Ater ◽  
Burnt Areas ◽  
Potential Food

We examined the response of birds to a severe summer wildfire in a Corsican pine forest during the first months following the disturbance. Only seed-eating species visited the burnt areas in large numbers. While certain trunks or branches were still burning, numerous birds, among them the coal tit Parus ater and the Corsican nuthatch Sitta whiteheadi, were attracted by the large amount of pine seeds made available by the opening of the cones under the action of heat. The number of seed-harvesting birds declined afterwards. We discuss how seed hoarding by tits and nuthatches enabled these resident birds to survive during the first winter after the fire in a burnt environment where seeds remained the only potential food source.

Chemical composition and microbiological assays of marine algae Enteromorpha spp. as a potential food source

2005 ◽  
Vol 18 (1) ◽  
pp. 79-88 ◽  
Author(s):  
M. Aguilera-Morales ◽  
M. Casas-Valdez ◽  
S. Carrillo-Domı́nguez ◽  
B. González-Acosta ◽  
F. Pérez-Gil
Keyword(s):  
Chemical Composition ◽  
Marine Algae ◽  
Food Source ◽  
Potential Food Source ◽  
Microbiological Assays ◽  
Potential Food

scholarly journals Competitors as accomplices: seaweed competitors hide corals from predatory sea stars

2015 ◽  
Vol 282 (1814) ◽  
pp. 20150714 ◽  
Author(s):  
Cody S. Clements ◽  
Mark E. Hay
Keyword(s):  
Field Experiments ◽  
Coral Cover ◽  
Ecological Communities ◽  
Protective Effects ◽  
Sea Star ◽  
Sea Stars ◽  
Macroalgal Blooms ◽  
Feeding Experiments ◽  
High Preference ◽  
And Function

Indirect biotic effects arising from multispecies interactions can alter the structure and function of ecological communities—often in surprising ways that can vary in direction and magnitude. On Pacific coral reefs, predation by the crown-of-thorns sea star, Acanthaster planci , is associated with broad-scale losses of coral cover and increases of macroalgal cover. Macroalgal blooms increase coral–macroalgal competition and can generate further coral decline. However, using a combination of manipulative field experiments and observations, we demonstrate that macroalgae, such as Sargassum polycystum , produce associational refuges for corals and dramatically reduce their consumption by Acanthaster . Thus, as Acanthaster densities increase, macroalgae can become coral mutualists, despite being competitors that significantly suppress coral growth. Field feeding experiments revealed that the protective effects of macroalgae were strong enough to cause Acanthaster to consume low-preference corals instead of high-preference corals surrounded by macroalgae. This highlights the context-dependent nature of coral–algal interactions when consumers are common. Macroalgal creation of associational refuges from Acanthaster predation may have important implications for the structure, function and resilience of reef communities subject to an increasing number of biotic disturbances.

Modeling adult emergence and fecundity of factitious hosts under different food sources supports massive egg production management

2017 ◽  
Vol 108 (2) ◽  
pp. 150-157 ◽  
Author(s):  
J. Tavares ◽  
L. Silva ◽  
L. Oliveira
Keyword(s):  
Mass Production ◽  
Egg Production ◽  
Production Management ◽  
Food Source ◽  
Adult Emergence ◽  
Food Sources ◽  
Food Type ◽  
Emergence Patterns ◽  
Lepidoptera Pyralidae ◽  
And Behavior

AbstractEphestia kuehniella(Lepidoptera, Pyralidae) andSitotroga cerealella(Lepidoptera, Gelechiidae) are important factitious hosts used for production of biological control agents. Their differences in terms of biology and behavior require adjustments in their mass production, particularly when using corn or barley as food in grain or in bran. We modeled adult emergence, oviposition period and egg production along time after emergence, as a function of the food source. Significant differences between hosts or food type were found for these variables and for adult weight but not for sex ratio. Our results confirm the possibility of mass production of these hosts using corn or barley as food source. Integrating adult emergence patterns and age specific fecundity patterns into a single model, it is clear that rearingE. kuehniellaon barley would result in the highest egg output in much shorter time thanE. kuehniellaon corn orS. cerealellaon barley.

scholarly journals Cephalaria transsylvanica-Based Flower Strips as Potential Food Source for Bees during Dry Periods in European Mediterranean Basin Countries

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e93153 ◽  
Author(s):  
Giovanni Benelli ◽  
Stefano Benvenuti ◽  
Nicolas Desneux ◽  
Angelo Canale
Keyword(s):  
Mediterranean Basin ◽  
Food Source ◽  
Potential Food Source ◽  
Potential Food
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