A comparison of the reproductive cycles of Modiolus modiolus (L.), Cerastoderma (=Cardium) edule (L.), and Mytilus edulis L. in Strangford Lough, Northern Ireland

Oecologia ◽  
1977 ◽  
Vol 30 (2) ◽  
pp. 173-188 ◽  
Author(s):  
R. Seed ◽  
R. A. Brown
Keyword(s):  
Northern Ireland ◽  
Mytilus Edulis ◽  
Strangford Lough ◽  
Modiolus Modiolus ◽  
Reproductive Cycles

The Extent and Temporal Variation of Disturbance to Epibenthic Communities in Strangford Lough, Northern Ireland

1997 ◽  
Vol 77 (4) ◽  
pp. 1151-1164 ◽  
Author(s):  
M. Service ◽  
B.H. Magorrian
Keyword(s):  
Northern Ireland ◽  
Spatial Effects ◽  
Side Scan Sonar ◽  
Trawl Fishery ◽  
Strangford Lough ◽  
Modiolus Modiolus ◽  
Superficial Sediments ◽  
Temporal And Spatial ◽  
Horse Mussel ◽  
The Impact

Side-scan sonar and underwater video were used to determine the impact of a trawl fishery on an epibenthic community associated with the horse mussel, Modiolus modiolus in a Northern Ireland sea lough. The presence of marks caused by trawl otter-boards on the sediments could be clearly seen using side-scan sonar and changes to the epibenthos are described from the video survey. It is apparent from the side-scan sonar survey that changes have occurred in the structure of the superficial sediments on heavily trawled areas. However, there was no clear indication of temporal changes. The utility of side-scan sonar coupled with GIS techniques to detect temporal and spatial effects is discussed.

scholarly journals Changes of Heart Rate and Lipid Composition in Mytilus Edulis and Modiolus Modiolus Caused by Crude Oil Pollution and Low Salinity Effects

2021 ◽  
Vol 11 (2) ◽  
pp. 46-60
Author(s):  
Igor Bakhmet ◽  
Natalia Fokina ◽  
Tatiana Ruokolainen
Keyword(s):  
Heart Rate ◽  
Crude Oil ◽  
Mytilus Edulis ◽  
Lipid Composition ◽  
Oil Pollution ◽  
Cardiac Activity ◽  
Blue Mussels ◽  
Low Salinity ◽  
Crude Oil Pollution ◽  
Modiolus Modiolus

Blue mussels, Mytilus edulis, inhabiting tidal zones, are naturally exposed to fluctuating environmental conditions (e.g., fluctuations in temperature and salinities), while horse mussels, Modiolus modiolus, live under relatively invariable shelf water conditions. The present investigation tested the hypothesis: blue mussels, in comparison to horse mussels, have an increased ability to tolerate the stress of pollution combined with low salinity. To assess the response of blue mussels and horse mussels to oil pollution at seawater salinities of 25 psu (normal) and 15 psu (low), we used a combination of heart rate and lipid composition as physiological and biochemical indicators, respectively. A sharp decrease in heart rate as well as important fluctuations in cardiac activity was observed under all oil concentrations. Modifications in the concentrations of the main membrane lipid classes (phosphatidylcholine, phosphatidylethanolamine, and cholesterol) and storage lipids (primarily triacylglycerols) in response to different crude oil concentrations were time- and dose-dependent. Both chosen indicators showed a high sensitivity to crude oil contamination. Furthermore, both bivalve species showed similar responses to oil pollution, suggesting a universal mechanism for biochemical adaptation to crude oil pollution.

The extent of grazing release from epiphytism forSargassum muticum(Phaeophyceae) within the invaded range

2009 ◽  
Vol 89 (2) ◽  
pp. 303-314 ◽  
Author(s):  
James A. Strong ◽  
Christine A. Maggs ◽  
Mark P. Johnson
Keyword(s):  
Northern Ireland ◽  
Native Species ◽  
Sargassum Muticum ◽  
Saccharina Latissima ◽  
Native Range ◽  
Epiphytic Algae ◽  
Macroalgal Species ◽  
Strangford Lough ◽  
Fucus Serratus ◽  
Japan And China

The overall biotic pressure on a newly introduced species may be less than that experienced within its native range, facilitating invasion. The brown algaSargassum muticum(Yendo) Fensholt is a conspicuous and successful invasive species originally from Japan and China. We comparedS. muticumand native macroalgae with respect to the biotic pressures of mesoherbivore grazing and ectocarpoid fouling. In Strangford Lough, Northern Ireland,S. muticumthalli were as heavily overgrown with seasonal blooms of epiphytic algae as native macroalgal species were. The herbivorous amphipodDexamine spinosawas much more abundant onS. muticumthan on any native macroalga. When cultured with this amphipod,S. muticumlost more tissue than three native macroalgae,Saccharina latissima(Linnaeus) Laneet al.,Halidrys siliquosa(Linnaeus) Lyngbye andFucus serratusLinnaeus.Sargassum muticumcultured with both ectocarpoid fouling and amphipods showed a severe impact, consistent with our previous findings of large declines in the density ofS. muticumobserved in the field during the peak of fouling. Despite being a recent introduction into the macroalgal community in Strangford Lough,S. muticumappears to be under biotic pressure at least equal to that on native species, suggesting that release from grazing and epiphytism does not contribute to the invasiveness of this species in Strangford Lough.

The distribution and utilisation of Zostera species in Strangford Lough, Northern Ireland

1994 ◽  
Vol 47 (3-4) ◽  
pp. 317-328 ◽  
Author(s):  
A.A. Portig ◽  
R.G. Mathers ◽  
W.I. Montgomery ◽  
R.N. Govier
Keyword(s):  
Northern Ireland ◽  
Strangford Lough

Gross Structure of the Adductor Muscles of Some Pelecypods

1973 ◽  
Vol 30 (10) ◽  
pp. 1583-1585 ◽  
Author(s):  
Carol M. Morrison ◽  
Paul H. Odense
Keyword(s):  
Mytilus Edulis ◽  
Crassostrea Virginica ◽  
Adductor Muscle ◽  
Mya Arenaria ◽  
Placopecten Magellanicus ◽  
Spisula Solidissima ◽  
Arctica Islandica ◽  
Modiolus Modiolus ◽  
Adductor Muscles ◽  
Clinocardium Ciliatum

A study of the gross structure of adductor muscles of the following pelecypods showed that they conform to Morton’s grouping into the a) "Protobranchia" (Nucula proxima and Yoldia limatula), b) "shallow-burrowing lamellibranchs" (Clinocardium ciliatum, Venericardia borealis, Astarte undata, Arctica islandica, Venus mercenaria, and Spisula solidissima), c) "surface attached lamellibranchs" (Mytilus edulis, Modiolus modiolus, Modiolus demissus, Placopecten magellanicus, and Crassostrea virginica), d) "deep-burrowing and immobile lamellibranchs" (Ensis directus, Hiatella arctica, and Mya arenaria); thus providing more evidence for his classification. The adductor muscle is divided into two portions — translucent and opaque — except in the "deep-burrowing and immobile lamellibranchs", which have opaque muscles only.

Sign in / Sign up

Export Citation Format

Share Document