Meristic Composition of Sand Lance (Ammodytes spp.) in Newfoundland Waters with a Review of Species Designations in the Northwest Atlantic

1988 ◽  
Vol 45 (3) ◽  
pp. 516-529 ◽  
Author(s):  
G. H. Winters ◽  
E. L. Dalley
Keyword(s):  
Coastal Waters ◽  
Gulf Of Maine ◽  
Good Evidence ◽  
Published Data ◽  
Sand Lance ◽  
Northwest Atlantic ◽  
West Greenland ◽  
The North ◽  
Meristic Counts ◽  
First Time

Examination of new meristic data on sand lance (Ammodytes spp.) populations in Newfoundland coastal waters using a combination of discriminant function and modal analyses demonstrates for the first time that co-occurrence is a common feature of the distribution of the two species (A. dubius and A. americanus) provisionally considered to exist in the Northwest Atlantic. In addition, the consistency in the meristic counts of A. dubius between the offshore and inshore samples and the postulated spawning of A. dubius in Newfoundland coastal waters provides good evidence that A. dubius is reproductively isolated from A. americanus. Reanalysis of published data on the vertebral composition of sand lance in the Northwest Atlantic confirms the co-occurrence of A. americanus and A. dubius in inshore areas from West Greenland southwards to the Gulf of Maine. These new analyses taken together with a review of the major distinguishing characteristics of sand lance species in the North Atlantic waters lead us to conclude that the heterogeneous assemblage of sand lance found inshore from West Greenland southwards and offshore from Georges Bank southwards and which has traditionally been classified as A. americanus belongs to a single trans-Atlantic species, A. marinus.

Distribution of the Cirratulid Polychaetes Dodecaceria Fimbriata, D. Concharum and D. Diceria in European Waters Between Latitudes 48°N and 70°N

1996 ◽  
Vol 76 (3) ◽  
pp. 625-635 ◽  
Author(s):  
Peter H. Gibson
Keyword(s):  
North Sea ◽  
Coastal Waters ◽  
Northern Europe ◽  
English Channel ◽  
The North ◽  
The North Sea ◽  
Firth Of Forth ◽  
First Time

The distribution of Dodecaceria in northern Europe was found for samples borrowed from museums and other collections. Dodecaceria fimbriata was present in the coastal waters of mainland Britain and the Continent from the English Channel northwards. Dodecaceria concharum was only found in British mainland coastal waters and on the French coast at the western end of the English Channel. It was absent where salinities were below ~34%0. The two species were sampled along the Lothian and Borders coasts and the numbers of D. concharum fell with decreasing salinity as the Firth of Forth was approached. Dodecaceria diceria was found for the first time in the North Sea at depths of 100–200 m. The benthic salinity here is ~35%0.

scholarly journals Upper Maastrichtian? – lower Paleocene dinoflagellate cysts and pollen from turbidites in the Itilli region, Nuussuaq, central West Greenland – first dating of the sediments

1993 ◽  
Vol 159 ◽  
pp. 81-87
Author(s):  
H Nøhr-Hansen
Keyword(s):  
North Coast ◽  
East Side ◽  
Dinoflagellate Cysts ◽  
The South ◽  
West Greenland ◽  
The North ◽  
First Time ◽  
Upper Maastrichtian

Dinoflagellate cysts are recorded for the first time from two sections representing the uppermost part of the more than two kilometre thick turbidite succession exposed on the south-east side of the Itilli valley in Nuussuaq, central West Greenland. The cysts were recovered from sections situated immediately below the Tertiary pillow breccia at Ilugissorsuaq and at Qaasersut. The dinoflagellate cysts are rare in these sediments and the diversity appears to be low in both sections. The species Palaeocystodinium cf. P. australinum is rare whereas Phelodinium kozlowskii is very common in the uppermost sample from Ilugissorsuaq. A similar acme of P. kozlowskii has been recovered from the lower Paleocene part of the Kangilia section on the north coast of Nuussuaq. The presence of P. cf. P. australinum and the pollen Wodehousia spinata at Qaasersut indicates the presence of uppermost Maastrichtian to lowermost Paleocene sediments.

The Peak Trough – a major control on the geology of the North Yorkshire coast

1989 ◽  
Vol 126 (6) ◽  
pp. 699-705 ◽  
Author(s):  
J. Milsom ◽  
P. F. Rawson
Keyword(s):  
Coastal Waters ◽  
Seismic Data ◽  
Fault System ◽  
The North ◽  
Early Tertiary ◽  
Form Part ◽  
First Time

AbstractAlthough the Mesozoic sediments of the Cleveland Basin (North Yorkshire) have generally not been strongly faulted, several approximately N–S trending faults have been identified along the coast. New seismic data from adjacent coastal waters has allowed the offshore extension to the fault system to be examined for the first time. The coastal faults from Peak (Ravenscar) to Red Cliff (Cayton Bay) are shown to form part of a linked system defining a narrow graben only some 5 km wide, the Peak Trough. Faulting has been complex, with decollement levels apparently developed in weak layers at various horizons in the Triassic and Permian strata: fault geometries and regional considerations suggest that extension has been dominant. Movement occurred intermittently from Triassic to latest Cretaceous or early Tertiary times.

Differential rates of killer whale attacks on humpback whales in the North Atlantic as determined by scarification

2013 ◽  
Vol 94 (6) ◽  
pp. 1311-1315 ◽  
Author(s):  
Jessica A. McCordic ◽  
Sean K. Todd ◽  
Peter T. Stevick
Keyword(s):  
North Atlantic ◽  
Gulf Of Maine ◽  
Killer Whale ◽  
Ecological Impact ◽  
Humpback Whale ◽  
Humpback Whales ◽  
Killer Whales ◽  
West Greenland ◽  
The North ◽  
The North Atlantic

As in other populations of killer whales, Orcinus orca, prey selectivity in the North Atlantic population may indicate behaviourally or ecologically distinct types of killer whales. Some killer whale ecotypes are known to prey on large whales, but the ecological impact of such predation events is unknown. Since killer whale attacks on humpback whales, Megaptera novaeangliae, are rarely witnessed, resultant scars may be used to determine the frequency of non-fatal predatory interactions. Using images from the North Atlantic Humpback Whale Catalogue (NAHWC), we examined humpback whale flukes for the presence of rake marks from killer whales (N = 5040). Scarring frequencies range from 2.7 to 17.4% and differ significantly among five regions of the North Atlantic (Gulf of Maine, Canada, West Greenland, Iceland and Norway). The scarring rate in the Canada region is significantly higher than all other regions, and Norway has a significantly lower scarring rate than all other regions, despite more frequently reported killer whale sightings in that region. Within the western North Atlantic, Canada has a scarring rate nearly twice that of either the Gulf of Maine or West Greenland. These data may reflect differential prey choice among killer whale ecotypes and/or the distribution of specific ecotypes across the North Atlantic basin.

First Record of the American Jack Knife Clam Ensis Directus on the French Coast of the North Sea

1993 ◽  
Vol 73 (1) ◽  
pp. 233-235 ◽  
Author(s):  
C. Luczak ◽  
J.-M. Dewarumez ◽  
K. Essink
Keyword(s):  
North Sea ◽  
Coastal Waters ◽  
New Records ◽  
First Record ◽  
English Channel ◽  
Southern Bight ◽  
The North ◽  
German Coast ◽  
The North Sea ◽  
First Time

Ensis directus (Bivalvia: Solenidae) was noted for the first time along the French coast of the North Sea in June 1991. High numbers of post larvae after a period of northerly winds indicate that settled larvae originated from adult populations in Belgian or Dutch coastal waters. Future dispersal of Ensis directus could be used as a biological tracer of coastal water movements between the Southern Bight of the North Sea and the English Channel.The American jack knife clam, Ensis directus (Conrad, 1843), synonym Ensis americanus (Binney, 1870)sensu van Urk (1964,1972), was discovered in Europe in the German Bight for the first time in June 1979 (Von Cosel et al., 1982). This species is assumed to have been transported in its larval stage by a ship containing ballast water. Considering the dimensions of the specimens, this probably happened in the first half of 1978 (Von Cosel et al., 1982; Mühlenhardt-Siegel et al., 1983). Since then this species has spread rapidly in the North Sea in subtidal and intertidal areas. Dense populations were found along the German coast within a few years (Von Cosel et al., 1982; Mühlenhardt-Siegel et al., 1983; Swennen et al., 1985). In 1986 Ensis directus was reported from the north and east Danish coasts as far as the Belgian coast (Kerkhof & Dumoulin, 1987) (Figure 1). Since then no new records have been reported.

High diversity of dinoflagellates in the intertidal sandy sediments of Wimereux (north-east English Channel, France)

2013 ◽  
Vol 94 (3) ◽  
pp. 443-457 ◽  
Author(s):  
Fernando Gómez ◽  
Luis F. Artigas
Keyword(s):  
Coastal Waters ◽  
English Channel ◽  
North East ◽  
The North ◽  
Benthic Dinoflagellates ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Sandy Sediments ◽  
First Time ◽  
High Diversity

Benthic dinoflagellates collected in spring–summer 2010 and 2011 from intertidal sandy sediments of the shore of Wimereux (north-east English Channel, France) were examined by light microscopy, and some of them by scanning electron microscopy. High dinoflagellate species richness, 70 species, was evidenced when compared to the plankton observed in the coastal waters of the north-east English Channel. The greatest difficulty in performing accurate species identification mainly concerned the heterotrophic species of Amphidinium sensu lato, the laterally flattened species of Amphidiniopsis, as well as some heterotrophic species of Thecadinium. Several undescribed species are here illustrated, mainly within these genera. The differences in size between species of Herdmania and Sabulodinium suggest the occurrence of at least a second species for these monotypic genera. The species Amphidiniopsis hexagona, A. rotundata, A. uroensis and Sinophysis minima are reported for the first time in the Atlantic Ocean and on European coasts. Although these species were only previously known from the Pacific Ocean, they should not necessarily be considered as newcomers or invasive species due to the scarce coverage of the previous studies on sand-dwelling dinoflagellates.

Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

2020 ◽  
Vol 33 ◽  
pp. 15
Author(s):  
Roi Martínez-Escauriaza ◽  
Claudio Vieira ◽  
Lídia Gouveia ◽  
Nuno Gouveia ◽  
Margarida Hermida
Keyword(s):  
Fish Species ◽  
Young Men ◽  
Coastal Areas ◽  
Teleost Fishes ◽  
The North ◽  
Southeast Coast ◽  
Madeira Archipelago ◽  
First Time

Data obtained from licenses of spearfishers and surveys conducted in 2004 and 2017 allowed for the analysis, for the first time, of the practice of spearfishing in the Madeira archipelago. Only a small percentage of the population practices spearfishing, mostly local young men. Most of them practice the activity with a partner throughout most of the year and along most of the island's coastal areas, although preferentially along the North and Southeast coast. Results show how, in recent years, despite the population of spearfishers decreasing, the abundance in the annual catch potentially increased, probably due to the higher investment of time in this activity. It has been observed that many fishers complement their catches with manual collecting of invertebrates. Overall, 40 teleost fishes and also 4 crustaceans and 8 molluscs were identified. The most frequently captured fish species were parrotfish and white seabream, while limpets were the most collected invertebrates in both selected periods.

Intra-seasonal and inter-annual patterns in the demographics of sand lance and response to environmental drivers in the North Pacific

2019 ◽  
Vol 617-618 ◽  
pp. 221-244 ◽  
Author(s):  
MR Baker ◽  
ME Matta ◽  
M Beaulieu ◽  
N Paris ◽  
S Huber ◽  
...  
Keyword(s):  
North Pacific ◽  
Environmental Drivers ◽  
Sand Lance ◽  
The North ◽  
The North Pacific ◽  
Annual Patterns

Sphagnum mosses (Sphagnaceae, Bryophyta) of mires Chefandzar and Masota in North Ossetia (Caucasus)

2018 ◽  
Vol 52 (2) ◽  
pp. 455-462 ◽  
Author(s):  
G. Ya. Doroshina ◽  
I. A. Nikolajev
Keyword(s):  
Plant Communities ◽  
The Other ◽  
North Caucasus ◽  
Sphagnum Mosses ◽  
Greater Caucasus ◽  
The North ◽  
First Time ◽  
North Ossetia

Sphagnum mires on the Greater Caucasus are rare, characterized by the presence of relict plant communities of glacial age and are in a stage of degradation. The study of Sphagnum of Chefandzar and Masota mires is carried out for the first time. Seven species of Sphagnum are recorded. Their distribution and frequency within the North Caucasus are analyzed. Sphagnum contortum, S. platyphyllum, S. russowii, S. squarrosum are recorded for the first time for the study area and for the flora of North Ossetia. The other mosses found in the study area are listed.

Materials to the lichen flora of Samurskiy Ridge (high mountainous Dagestan)

2018 ◽  
Vol 52 (2) ◽  
pp. 397-406
Author(s):  
A. B. Ismailov ◽  
G. P. Urbanavichus
Keyword(s):  
North Caucasus ◽  
Lichenicolous Fungi ◽  
Greater Caucasus ◽  
Altitudinal Range ◽  
The North ◽  
New Findings ◽  
Mountainous Landscapes ◽  
First Time ◽  
Lichen Flora

The lichens and lichenicolous fungi of high mountainous landscapes of Samurskiy Ridge were studied in altitudinal range 2400–3770 m a. s. l. for the first time and 112 species are recorded. Among them 33 species, 10 genera (Arthrorhaphis, Baeomyces, Calvitimela, Epilichen, Lambiella, Psorinia, Rufoplaca, Sagedia, Sporastatia, Tremolecia) and 4 families (Anamylopsoraceae, Arthrorhaphidaceae, Baeomycetaceae, Hymeneliaceae) are new for Dagestan, six species (Buellia uberior, Carbonea atronivea, Lecanora atrosulphurea, Lecidea fuliginosa, L. swartzioidea, Rhizoplaca subdiscrepans) are reported for the first time for the Greater Caucasus and two species (Acarospora subpruinata and Rhizocarpon postumum) — for the North Caucasus. Most of the new findings were collected from 3500–3770 m a. s. l.

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