Transplant experiment to evaluate the feeding behaviour of the Atlantic ribbed mussel, Geukensia demissa, moved to a high inorganic seston area

2015 ◽  
Vol 66 (3) ◽  
pp. 220 ◽  
Author(s):  
E. Galimany ◽  
J. M. Rose ◽  
M. S. Dixon ◽  
G. H. Wikfors
Keyword(s):  
Environmental Remediation ◽  
Atlantic Coast ◽  
Absorption Efficiency ◽  
Feeding Strategies ◽  
Transplant Experiment ◽  
North East ◽  
The North ◽  
The Usa ◽  
Ribbed Mussels ◽  
Ribbed Mussel

In 2011–12, a field study demonstrated that ribbed mussels from two locations in the north-east Atlantic Coast of the USA used different feeding strategies to adapt to widely differing seston characteristics and achieve the same absorption efficiency. To investigate whether there was local, genetic adaptation of mussels in the two contrasting sites, we conducted a transplant experiment in 2012 in which mussels were moved from the high-plankton, low-inorganic waters of Milford Harbor, CT, to the high-inorganic, low-plankton waters of Hunts Point, Bronx, NY. Results showed that mussels from Milford adapted to the new, poorer-quality seston within 6 days of submersion in Hunts Point waters, which indicates that phenotypic plasticity in the species is sufficient to account for adaptability of the ribbed mussel to Hunts Point conditions. This adaptability makes the ribbed mussel a good candidate for environmental remediation technologies, such as nutrient bioextraction.

A Note on the Diet Synaphobranchus Kaupi (Pisces: Synaphobranchidae) from the Porcupine Seabight, North-East Atlantic

1998 ◽  
Vol 78 (4) ◽  
pp. 1385-1388 ◽  
Author(s):  
Afonso Marques
Keyword(s):  
Atlantic Coast ◽  
Abundant Species ◽  
West African ◽  
East Atlantic ◽  
Porcupine Seabight ◽  
Middle Atlantic ◽  
North East ◽  
The North ◽  
Fourth Level ◽  
The Usa

The diet of Synaphobranchus kaupi from the Porcupine Seabight is described. A sample of 110 eel stomachs containing food, were analysed and the general size–depth trend among eels with food in their stomachs. Larger individuals are found in deeper waters. Fish are the main prey for larger eels and crustaceans are preferred by smaller individuals.Synaphobranchus kaupi Johnson, 1862 is a slope dwelling eel, abundant in the north-east Atlantic Ocean from 230 to 2420 m deep on the continental slope (Haedrich & Merrett, 1988). It is the most abundant species on the slopes of the Porcupine Seabight, off south-west Ireland (Merrett et al, 1991; Priede et al., 1994) and was classified as a benthopelagic predator of the fourth level, predator of predators (Saldanha, 1991).The diet of S. kaupi has been described from the slope off the middle Atlantic coast of the USA (Sedberry & Musick, 1978), from the Portuguese slope and in the Bay of Biscay (Saldanha, 1991), from the west African slope (Merrett & Marshall, 1981; Merrett & Domanski, 1985) and from the Rockall Trough (Gordon & Mauchline, 1996).Our specimens were captured during a joint IOS/SAMS survey (Merret et al., 1991). From a total catch of 8792 S. kaupi, captured between 1979 and 1983 in the Porcupine Seabight, ranging from 470 to 2230 m deep, fish stomachs were removed aboard ship and 110 with food were kept in 5% formalin for further analysis.

scholarly journals Greater sage-grouseCentrocercus urophasianusmigration links the USA and Canada: a biological basis for international prairie conservation

Oryx ◽  
2011 ◽  
Vol 46 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Jason D. Tack ◽  
David E. Naugle ◽  
John C. Carlson ◽  
Pat J. Fargey
Keyword(s):  
Oil And Gas ◽  
Sage Grouse ◽  
Conservation Areas ◽  
International Partnerships ◽  
North East ◽  
The North ◽  
Human Footprint ◽  
Spatial Composition ◽  
Population Science ◽  
The Usa

AbstractMigratory pathways in North American prairies are critical for sustaining endemic biodiversity. Fragmentation and loss of habitat by an encroaching human footprint has extirpated and severely truncated formerly large movements by prairie wildlife populations. Greater sage-grouseCentrocercus urophasianus, a Near Threatened landscape species requiring vast tracts of intact sagebrushArtemisiaspp., exhibit varied migratory strategies across their range in response to the spatial composition of available habitats. We unexpectedly documented the longest migratory event ever observed in sage-grouse (> 120 km one way) in 2007–2009 while studying demography of a population at the north-east edge of their range. Movements that encompassed 6,687 km2included individuals using distinct spring and summer ranges and then freely intermixing on the winter range in what is probably an obligate, annual event. The fate of greater sage-grouse in Canada is in part dependent on habitat conservation in the USA because this population spans an international border. Expanding agricultural tillage and development of oil and gas fields threaten to sever connectivity for this imperilled population. Science can help delineate high priority conservation areas but the fate of landscapes ultimately depends on international partnerships implementing conservation at scales relevant to prairie wildlife.

Evaluation of collection flax accessions for resistance to fusarium wilt and anthracnose in the North-East of Ukraine

2018 ◽  
pp. 43-53
Author(s):  
O.Yu. Yotka ◽  
V.I. Chuchvaha ◽  
L.M. Kryvosheieva
Keyword(s):  
Fusarium Wilt ◽  
Unknown Origin ◽  
Sources Of Resistance ◽  
Fiber Flax ◽  
Breeding Material ◽  
North East ◽  
The North ◽  
Medium Resistance ◽  
The Usa ◽  
The Republic

Goal. To evaluate collection flax accessions of the Institute of Bast Crops for resistance to Fusarium wilt and anthracnose in the North-east Ukraine, to identify, on the basis of screening, varieties with medium and high resistance to pathogens and to create new initial breeding material on artificial infections. Materials and methods. The study was carried out in the infectious-provocative nursery in the field of the Institute of Bast Crops in compliance with the "Methodical guidelines for the phytopathological evaluation of resistance of breeding material of fiber flax to Fusarium wilt" and " Methodological instructions on the phytopathological evaluation of resistance of fiber flax to diseases" in 2011 ­ 2016. Results and discussion. In 2011-2016, 115 accessions of the Ukrainian national flax collection from 15 countries were evaluated for resistance to Fusarium wilt and anthracnose in the infectious nursery: 31 accessions from Ukraine; 26 – from Belarus; 15 - from France; 8 - from Russia; 8 - from Poland; 6 - from the USA; 4 - from Lithuania; 4 - from the Czech Republic; 4 – from Argentina; 3 - from the Netherlands; 1 accession from Belgium; 1 - from Germany; 1 - from Kenya; 1 - from Morocco; 1 from Canada; and 1 accession of unknown origin. Varieties were assessed for resistance to disease in comparison with reference varieties. There were 8 Fusarium-resistant and 3 Colletotrichum-resistant accessions. Most of the varieties under investigation were medium resistant to Fusarium wilt (59.1%) and susceptible to anthracnose (82.6 %). Conclusions. As a result of the research into resistance of the collection material to Fusarium wilt and anthracnose in the infectious nursery, sources of resistance to diseases were identified: ACM Duff (UF0402149) from Canada, Atena (UF0401927) from Poland, LKS 2 (UF0402112), LKS 10 (UF0402101), LKS 11 (UF0402102), LKS 12 (UF0402196), LKS 14 (UF0402194), LKS 15 (UF0402198) from Ukraine - to Fusarium wilt; LKS 1 (UF0402111), LKS 11 (UF0402102) from Ukraine, Fort (UF0401942) from the Republic of Belarus - to anthracnose. Ukrainian fiber flax accessions combining resistance to two diseases: LKS 11 (resistance to Fusarium wilt and anthracnose), LKS 2, LKS 10, LKS 12, LKS 14, and LKS 15 (resistance to Fusarium wilt and medium resistance to anthracnose), LKS 1 (medium resistance to Fusarim wilt and resistance to anthracnose) were singled out.

A preliminary investigation of the lipids of abyssal holothurians from the north-east Atlantic Ocean

2000 ◽  
Vol 80 (1) ◽  
pp. 139-146 ◽  
Author(s):  
Michael L. Ginger ◽  
Vera L.C.S. Santos ◽  
George A. Wolff
Keyword(s):  
Shallow Water ◽  
De Novo ◽  
Preliminary Investigation ◽  
Minor Component ◽  
Feeding Strategies ◽  
North East ◽  
The North ◽  
Deep Water Species ◽  
Water Species ◽  
Fatty Acid Compositions

The dominant lipids of seven species of abyssal holothurians (Oneirophanta mutabilis, Pseudostichopus villosus, Psychropotes longicauda, Deima validium, Parariza prouhoi, Amperima rosea and Molpadia blakei) have been examined in detail. Fatty acid compositions are qualitatively similar to those of shallow-water holothurians, but relatively higher amounts of unsaturated compounds in the deep sea animals are ascribed to an adaptation of the latter to maintain membrane fluidity at high pressure and low temperature. The sterol distributions of abyssal holothurians are complex, with mixtures of C26–C30 sterols being present in all of the animals. These are most likely to be dietary in origin; the holothurians substitute Δ5 with Δ7 unsaturation, via Δ5,7 or Δ0 intermediates. 14α-methylcholest-9(11)-enol, which is a common product of de novo biosynthesis in shallow-water holothurians is absent in all of the deep-water species. Furthermore, cholest-7-enol, the dominant product of de novo biosynthesis in shallow water animals, is a relatively minor component in all of the species, except A. rosea. This holothurian is also the only one that appears to assimilate 4α-methylsterols directly and contains high amounts of steryl sulphates. There are significant interspecies differences in the free sterol distributions which may reflect their different feeding strategies or niches.

scholarly journals Low Diversity of Intertidal Canopy-Forming Macroalgae at Urbanized Areas along the North Portuguese Coast

Diversity ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 211
Author(s):  
Marcos Rubal García ◽  
Catarina A. Torres ◽  
Puri Veiga
Keyword(s):  
Urban Areas ◽  
Atlantic Coast ◽  
Interactive Effect ◽  
Anthropogenic Disturbances ◽  
Rocky Shores ◽  
North East ◽  
The North ◽  
The Family ◽  
Low Diversity ◽  
Main Component

Canopy-forming macroalgae are the main component in some of the most diverse and productive coastal habitats around the world. However, canopy-forming macroalgae are very sensitive to anthropogenic disturbances. In coastal urban areas, intertidal organisms are exposed to the interactive effect of several anthropogenic disturbances that can modify the community’s structure and diversity. Along the North-East Atlantic shores, many studies explored the effect of anthropogenic disturbances on canopy-forming macroalgae, but mainly focused on kelps and fucoids. However, along the intertidal rocky shores of the Atlantic coast of the Iberian Peninsula, the most abundant and frequent canopy-forming macroalgae belong to the family Sargassaceae. To explore the effect of urbanization on these intertidal canopy-forming species the diversity and assemblage structure of canopy species were compared between four urban and four non-urban shores in the north of Portugal. Intertidal canopy assemblages on urban shores were dominated by the non-indigenous Sargassum muticum that was the only canopy-forming species on three of the four studied urban shores. Canopy assemblages on all non-urban shores were more diverse. Moreover, stands of canopy-forming species on urban shores were always monospecific, while at non-urban shores multi-specific stands were common. Therefore, results suggest that urbanization reduces canopy´s biodiversity.

Marine Plankton

2017 ◽  
Keyword(s):  
Atlantic Coast ◽  
Detailed Knowledge ◽  
Line Drawings ◽  
Marine Life ◽  
The North ◽  
Geographic Coverage ◽  
North Eastern ◽  
The Usa ◽  
The North Sea ◽  
Ecological Importance

A thorough understanding of planktonic organisms is the first step towards a real appreciation of the diversity, biology, and ecological importance of marine life. A detailed knowledge of their distribution and community composition is particularly important since these organisms are often very delicate and sensitive to change, and can be used as early indicators of environmental change. Natural and man-induced modification of the environment can affect both the distribution and composition of plankton, with important ecological and economic impacts. This book provides a practical guide to plankton biology with a large geographic coverage spanning the North Sea to the north-eastern Atlantic coast of the USA and Canada. The book is divided into three sections: an overview of plankton ecology, an assessment of methodology in plankton research covering sampling, preservation, and counting of samples, and a taxonomic guide illustrated with line drawings to aid identification.

scholarly journals The Method for Organizing the North East Asian Economic Cooperation Body

1991 ◽  
Vol 6 (0) ◽  
pp. 75-90
Author(s):  
Chung Won Park
Keyword(s):  
East Asia ◽  
East Asian ◽  
World Order ◽  
Economic Cooperation ◽  
New World Order ◽  
North East ◽  
The North ◽  
Six Nations ◽  
The Usa ◽  
The Cold War

At the time that the era of the Cold War is vanishing and that the new world order is forming, we are realizing the need of the economic cooperation body. Particularly, because the importance of the north east Asia in the light of economy is increasing, we can organize the north east Asian economic cooperation with six nations. And in the course of organizing the plan, Korea should play an important role and it will cause South Korea and North Korea to release the opposition. It will form the new Pacific order among the USA, the USSR, and Japan and form the economic cooperation circle like E.C. Consequently, the north east Asian economic cooperation body will organize the field to the end of coprosperity and cosecurity in the north east Asia and the Korean peninsula.

Ras al Khaimah: further archaeological discoveries

Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi
Keyword(s):  
United Arab Emirates ◽  
The State ◽  
Focused Attention ◽  
North East ◽  
The North ◽  
History Of ◽  
The City

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.

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