scholarly journals Limited value of the common periwinkle snail Littorina littorea as a biological control for the invasive tunicate Didemnum vexillum

2009 ◽  
Vol 4 (1) ◽  
pp. 291-294 ◽  
Author(s):  
Mary Carman
Keyword(s):  
Biological Control ◽  
Littorina Littorea ◽  
Didemnum Vexillum ◽  
The Common

Etching of the Test Surface of Benthonic Foraminifers due to Ingestion by the Gastropod Littorina littorea Linné

1971 ◽  
Vol 8 (11) ◽  
pp. 1487-1491 ◽  
Author(s):  
D. A. Walker
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Littorina Littorea ◽  
Test Surface ◽  
Partial Dissolution ◽  
The Common ◽  
Wall Construction ◽  
Acidic Nature ◽  
Scanning Electron

Investigations by scanning electron microscopy have revealed that ingestion of Rosalina floridana (Cushman) and Quinqueloculina seminulum (Linné) (Foraminiferida) by the common periwinkle Littorina littorea Linné results in severe etching of the surface veneer in the rotalids studied, and removal of the surface veneer and partial dissolution of the underlying tabular layer of calcite in the miliolids examined. The acidic nature of the digestive juices is suggested as the agent responsible for this phenomenon. Observations of test wall construction is compared to current models of calcite secretion.

The living community inside the common periwinkle, Littorina littorea

2013 ◽  
Vol 91 (5) ◽  
pp. 293-301 ◽  
Author(s):  
John Buckland-Nicks ◽  
Sarah Ann Chisholm ◽  
Glenys Gibson
Keyword(s):  
Mantle Cavity ◽  
Snail Host ◽  
Coralline Algae ◽  
Littorina Littorea ◽  
Rocky Shores ◽  
Small Community ◽  
Wide Range ◽  
Animal Phyla ◽  
The Common ◽  
Trematode Infections

An extensive community of organisms inhabits the common periwinkle, Littorina littorea (L., 1758), along the wave-swept rocky shores of Canada’s East coast. This community, which includes both facultative and obligate endosymbionts, comprises a diverse array of species from seven animal phyla, including Annelida, Arthropoda, Gnathostomulida, Nematoda, Nemertea, and Platyhelminthes, as well as ciliates and algae. The presence of larger numbers of endosymbionts was found to correlate with specific shell characteristics of the snail host, including a wider aperture and columella, suggesting that these individuals have a larger mantle cavity relative to snails housing a small community of endosymbionts. Snails with large communities of endosymbionts were usually encrusted with coralline algae and often had trematode infections. Although L. littorea has been extensively studied since the last century, the existence of this community of organisms has passed unnoticed. The large diversity of organisms in this community suggests that these snails may provide refugia for a wide range of smaller taxa.

scholarly journals New record of Common Owlet Moth Spirama helicina (Hubner, 1831) (Lepidoptera: Erebidae: Catocalinae) from Aligarh (Uttar Pradesh) with systematic account, distribution, host plants and biological control

2020 ◽  
Vol 1 (1) ◽  
pp. 37-41
Author(s):  
Akhlaq Husain ◽  
◽  
Wajid Hasan ◽  
Keyword(s):  
Biological Control ◽  
Life Cycle ◽  
New Record ◽  
Host Plants ◽  
Uttar Pradesh ◽  
Present Communication ◽  
Systematic Account ◽  
The Common

The present communication deals with the new record of Spirama helicina (Hubner, 1831), the Common Owlet Moth from Aligarh (Uttar Pradesh) and its systematic account, distribution, life cycle, host plants and biological control.

A Contribution to the Life History of Echinostomum secundum, Nicoll

Parasitology ◽  
1908 ◽  
Vol 1 (4) ◽  
pp. 352-358 ◽  
Author(s):  
Marie V. Lebour
Keyword(s):  
Life History ◽  
Littorina Littorea ◽  
Bivalve Mollusks ◽  
Larval Form ◽  
Larval Trematode ◽  
Feeding Experiments ◽  
History Of ◽  
The Common ◽  
Young Worm ◽  
Marine Laboratory

In some notes on the Trematodes of Northumbria published in 1905 a few remarks were made on a larval Trematode inhabiting the liver of the common periwinkle Littorina littorea. The liver in two per cent. of the periwinkles from Budle Bay was full of rediæ containing cercariæ more or less developed, the latter agreeing in every way with an encysted Echinostomum larva which inhabits mussels, cockles and other bivalve mollusks in the same locality. So close was the resemblance that I had no hesitation in declaring them to be the same worm in different stages, but hoped for an opportunity of demonstrating this by experiment. In October 1908 through the courtesy of Professor Meek I had the opportunity of conducting some feeding experiments in the Dove Marine Laboratory, Cullercoats, which have given satisfactory results, and although it is not possible to state absolutely that the forms are identical yet the evidence is so strong that I think I am justified in regarding the young worm in the periwinkle as an earlier larval form of the encysted worm in the foot of the mussel and cockle.

scholarly journals Recruiting on the Spot: A Biodegradable Formulation for Lacewings to Trigger Biological Control of Aphids

Insects ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 6 ◽  
Author(s):  
Joakim Pålsson ◽  
Gunda Thöming ◽  
Rodrigo Silva ◽  
Mario Porcel ◽  
Teun Dekker ◽  
...  
Keyword(s):  
Biological Control ◽  
Natural Enemies ◽  
Rhopalosiphum Padi ◽  
Aphid Species ◽  
Chemical Defenses ◽  
Population Reduction ◽  
The Common ◽  
New Formulation ◽  
Eggs And Larvae ◽  
Field Setting

Upon herbivory, plants release herbivore-induced plant volatiles (HIPVs), which induce chemical defenses in the plant as well as recruit natural enemies. However, whether synthetic HIPVs can be employed to enhance biological control in a cultivated crop in the field is yet to be explored. Here we show that a biodegradable formulation loaded with induced and food-signaling volatiles can selectively recruit the common green lacewing, Chrysoperla carnea, and reduce pest population under field conditions. In apple orchards, the new formulation attracted lacewing adults over a 4-week period, which correlated well with independent assessments of the longevity of the slow-release matrix measured through chemical analyses. In barley, lacewing eggs and larvae were significantly more abundant in treated plots, whereas a significant reduction of two aphid species was measured (98.9% and 93.6% of population reduction, for Sitobion avenae and Rhopalosiphum padi, respectively). Results show the potential for semiochemical-based targeted recruitment of lacewings to enhance biological control of aphids in a field setting. Further research should enhance selective recruitment by rewarding attracted natural enemies and by optimizing the application technique.

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