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The mineral content (ppm) determined for 6–18 mm Ischadium recurvum and Mulinia lateralis collected in winter from the Chesapeake Bay and for I. recurvum collected from the Bay in winter and spring by size class (6–12, 12–18, 18–24, 24–30, 30–36, 36–42 mm.)
Source publication
Decline in surf scoter (Melanitta perspicillata) waterfowl populations wintering in the Chesapeake Bay has been associated with changes in the availability of benthic bivalves. The Bay has become more eutrophic, causing changes in the benthos available to surf scoters. The subsequent decline in oyster beds (Crassostrea virginica) has reduced the ha...
Similar publications
Haslea ostrearia is the marine diatom that synthesizes and releases marennine, the blue-green pigment responsible for the greening of oysters. This phenomenon, which occurs erratically in oyster ponds on the French Atlantic Coast, increases the economic value of cultured oysters. Marennine displays several biological activities, e.g., antibacterial...
The invasive Pacific oyster, Crassostrea gigas Thunberg, 1793 was introduced in Denmark for aquaculture in the 1970s. Presently, feral populations are found in many parts of the country, with the largest populations established on existing beds of blue mussel, Mytilus edulis Linnaeus, 1758. This study was conducted in the Limfjord estuary, at Agger...
On the basis of the summarized descriptions of their content, within this chapter the
interrelationship between the individual publications of this thesis is described.
In the first investigation, “Quantitative assessment of intertidal blue mussel
(Mytilus edulis L.) stocks: combined methods of remote sensing, field
investigation and sampling” (Ann...
At an approximately 12 000 m² sheltered intertidal bivalve bed in the western part of the Limfjord, Denmark, the Pacific oyster Crassostrea gigas co-occurs with the blue mussel Mytilus edulis. The relative significance of the impact of the 2 species on phytoplankton density during a tidal cycle was estimated by combining field measurements of clear...
Citations
... Many mollusks are a source of food for many crops, and therefore, play an important role in the fishing industries of many countries, especially in Asian countries, such as China and Japan. Many species of shellfish are also used to make ornaments and are harvested for the pearl and mother-of-pearl industries [7][8][9]. ...
Abstract: Nowadays, the use of marine by-products as precursor materials has gained great in-terest in the extraction and production of chemical compounds with suitable properties and pos-sible pharmaceutical applications. The present paper presents the development of a new imme-diate release tablet containing calcium lactate obtained from Black Sea mussel shells. Compared with other calcium salts, calcium lactate has a good solubility and bioavailability. In the phar-maceutical preparations, calcium lactate was extensively utilized as calcium source for prevent-ing and treating calcium deficiencies. The physical and chemical characteristics of synthesized calcium lactate were evaluated using Fourier Transform Infrared Spectroscopy, X-ray diffraction analysis and thermal analysis. Further, the various pharmacotechnical properties of the calcium lactate obtained from mussel shell were determined in comparison with an industrial used di-rect compressible Calcium lactate DC (PURACAL®). The obtained results suggest that mussel shell by-products are suitable for the development of chemical compounds with potential ap-plications in the pharmaceutical domain.
Citation: Mititelu, M.; Moros,an, E.;
Nicoar ˘a, A.C.; Sec ˘areanu, A.A.;
Musuc, A.M.; Atkinson, I.; Pandele
Cusu, J.; Nit,ulescu, G.M.; Ozon, E.A.;
Sarbu, I.; et al. Development of
Immediate Release Tablets
Containing Calcium Lactate
Synthetized from Black Sea Mussel
Shells. Mar. Drugs 2022, 20, 45.
https://doi.org/10.3390/md20010045
... In addition to the hunting and predation, recent studies show that reduced food availability, destruction and modification of feeding habitats (Browne and Aebischer, 2003;Rocha and Quillfeldt, 2015), are among the main factors threatening the turtle dove population (Alés, 1996;Browne et al., 2005;Bakaloudis et al., 2009). This reveals how important is to study the trophic diet of the turtle dove (Lormée, 2001;Wells-Berlin et al., 2015). ...
The approach of the birds to use physical and alimentary resources in degraded and modified natural habitats is an important aspect of their adaptation. This study was undertaken during 2016-2017 at forty habitats in the Moulouya plain, Morocco to examine behavioral diet, habitat use and foraging ecology of turtle dove, Streptopelia turtur. We monitored turtle doves in four major plots namely cereal plots, lucerne farms, apple orchards, and stations in the Ansgmir River covering 40 habitats. Digestive tract contents were also identified and evaluated for 68 Turtle Doves shot by hunters during two consecutive years. The results showed that the turtle doves use a variability of feeding habitats. The cereal cultivation seemed to be more preferable habitat for feeding especially in the month of May, the first breeding phase of the year. But, during the months of August and July, the riverbanks were the preferred habitat for turtle doves. The diet of this species is polyphagous and diverse with a granivorous tendency. Diet analysis showed that soft wheat and barley seeds constituted 44.53% and 38.74% respectively followed by barley seeds with 38.74% and sand stones (9.16%) of the seeds eaten by Turtle Doves. However, moderate proportion of elements (7.32%) remained undefined. All these aspects, including the variability of feeding habitats and the wide diet seem to be an adaptive strategy followed by turtle dove to counter the degradation and the modification of its natural feeding habitats.
... The size of the clam meat in some of the samples appeared to originate from clams larger than typically eaten by Longtailed Ducks. The breaking of shells by the dredge makes for faster and energetically more economical foraging by getting a larger quantity of meat without wasting energy grinding shells (Wells-Berlin et al. 2015). ...
A foraging group of Clangula hyemalis (Long-tailed Duck) was observed on 10 February 2010 diving behind a commercial boat that was clamming near Monomoy Island, Nantucket Sound, MA. We used a shotgun to collect 9 of the ducks, and our analyses of gizzard and gullet (esophagus and proventriculus) revealed 37 food items in the gizzard and 16 in the gullet. Mollusca were the dominant food in the gizzard (49%), whereas Crustacea were dominant in the gullet (57%). Crustacea were the second most important food in the gizzard (38%), whereas Mollusca were the second most important food in the gullet (31%). Relatively high volumes of the Amphipoda Caprella sp. (skeleton shrimp) and the Decopoda Crangon septemspinosa (Sand Shrimp) were recorded in the gullet and gizzard. Ensis directus (Atlantic Jackknife Clam) formed the greatest volume of Mollusca in the gizzard (15%) and in the gullet (15%). Long-tailed Ducks had fed on this Bivalvia and several other species of Mollusca that had no shell or broken shell when consumed. Many of the food organisms were apparently dislodged and some damaged by the clamming operation creating an opportunistic feeding strategy for the Long-tailed Ducks.
