نتایج جستجو برای: rock oyster

تعداد نتایج: 43970  

Journal: :Parasitology 2008
D Bearham Z Spiers S R Raidal J B Jones P K Nicholls

A Minchinia sp. (Haplosporidia: Haplosporidiidae) parasite was identified infecting rock oysters and morphologically described by Hine and Thorne (2002) using light microscopy and transmission electron microscopy (TEM). The parasite was associated with up to 80% mortality in the host species and it is suspected that the parasite would be a major impediment to the development of a tropical rock ...

2014
M. Lisa Kellogg Jeffrey C. Cornwell Michael S. Owens Kennedy T. Paynter

Global loss of 85% of oyster reef ecosystems over the past 130 yr (Beck et al. 2011) has led to both growing recognition of the services once provided by healthy oyster reef ecosystems (Grabowski et al. 2012) and increasing interest in restoring these ecosystems. In Chesapeake Bay, USA, populations of the native oyster Crassostrea virginica have been reduced to <1% of historic levels through a ...

Journal: :Marine pollution bulletin 2009
Leah I Bendell Cindy Feng

Oysters from the north-west coast of Canada contain high levels of cadmium, a toxic metal, in amounts that exceed food safety guidelines for international markets. A first required step to determine the sources of cadmium is to identify possible spatial and temporal trends in the accumulation of cadmium by the oyster. To meet this objective, rather than sample wild and cultured oysters of unkno...

2009
JULIANA M. HARDING ROGER MANN MELISSA J. SOUTHWORTH

Eastern oysters were ecologically and structurally dominant features of the Chesapeake Bay prior to European colonization. Four centuries of harvest pressure, habitat degradation, and, more recently, disease activity have affected extant oyster population demographics. We compared population demographics and age-at-shell length relationships for modern mesohaline James River oyster populations ...

2017
Pierre Gernez David Doxaran Laurent Barillé

Citation: Gernez P, Doxaran D and Barillé L (2017) Shellfish Aquaculture from Space: Potential of Sentinel2 to Monitor Tide-Driven Changes in Turbidity, Chlorophyll Concentration and Oyster Physiological Response at the Scale of an Oyster Farm. Front. Mar. Sci. 4:137. doi: 10.3389/fmars.2017.00137 Shellfish Aquaculture from Space: Potential of Sentinel2 to Monitor Tide-Driven Changes in Turbidi...

Journal: :The Southeast Asian journal of tropical medicine and public health 2011
Leera Kittigul Kannika Pombubpa Suntharee Sukonthalux Tippawan Rattanatham Fuangfa Utrarachkij

One hundred and eighteen oyster samples collected from local markets and oyster farms in southern Thailand were examined for noroviruses (NoVs) and bacterial indicators of fecal contamination (fecal coliforms and Escherichia coli). Using a virus concentration procedure followed by RT-nested PCR, NoVs were detected in 38% of the samples. Oysters collected from oyster farms were found with NoVs a...

2010
MICHAEL W. BECK ROBERT D. BRUMBAUGH LAURA AIROLDI ALVAR CARRANZA LOREN D. COEN

Native oyster reefs once dominated many estuaries, ecologically and economically. Centuries of resource extraction exacerbated by coastal degradation have pushed oyster reefs to the brink of functional extinction worldwide. We examined the condition of oyster reefs across 144 bays and 44 ecoregions; our comparisons of past with present abundances indicate that more than 90% of them have been lo...

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