A redescription of Leucothoe spinicarpa (Abildgaard, 1789) based on material from the North Atlantic (Amphipoda: Leucothoidae)

Zootaxa ◽  
2006 ◽  
Vol 1170 (1) ◽  
pp. 57 ◽  
Author(s):  
STACIE E. CROWE
Keyword(s):  
North Atlantic ◽  
Species Complex ◽  
Cosmopolitan Distribution ◽  
The North ◽  
The Status ◽  
The North Atlantic

The identification of Leucothoe spinicarpa (Abildgaard) has presented a problem for taxonomists in recent years as it is widely regarded to be part of a species complex with cosmopolitan distribution. In an attempt to clarify the status of this species, a neotype of Leucothoe spinicarpa is herein designated and a complete redescription of the species given.

Complement to the knowledge of the Haploops species (Crustacea, Gammaridea, Ampeliscidae), with the description of two new species from North Atlantic Ocean. [Contribution to the knowledge of the Haploops genus. 10.]

Zootaxa ◽  
2021 ◽  
Vol 5048 (2) ◽  
pp. 151-175
Author(s):  
R.A. KAIM-MALKA ◽  
D. BELLAN-SANTINI ◽  
J.C. DAUVIN
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Morphological Characters ◽  
Valid Species ◽  
Single Pair ◽  
The North ◽  
Two New Species ◽  
The Status ◽  
The North Atlantic

Two new Haploops species are described from the North Atlantic Ocean: a blind species Haploops faroensis spec. nov. and Haploops truncata spec. nov. with a single pair of corneal lenses. In addition, Haploops vallifera Stephensen 1925 and Haploops similis Stephensen 1925, are re-described and the status of Haploops spinosa Shoemaker 1931, is re-established as a valid species. A table is given of the 75 morphological characters of the studied species.  

Cryptic Sebastes norvegicus species in Greenland waters revealed by microsatellites

2017 ◽  
Vol 74 (8) ◽  
pp. 2148-2158 ◽  
Author(s):  
Atal Saha ◽  
Lorenz Hauser ◽  
Rasmus Hedeholm ◽  
Benjamin Planque ◽  
Svein-Erik Fevolden ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Cryptic Species ◽  
North Atlantic ◽  
Species Complex ◽  
Fishery Management ◽  
Gene Pools ◽  
The North ◽  
Management Regime ◽  
Sustainable Exploitation ◽  
The North Atlantic

Abstract Identification of cryptic species can have profound implications in fishery management, conservation and biodiversity contexts. In the North Atlantic, the genus Sebastes is currently represented by four species, although additional cryptic species have been assumed. The connectivity of the gene-pools within the genus in Greenland waters, in particular, remains largely unexplored. Using a panel of 13 microsatellite markers for 720 fish, we explored the species complex of Sebastes norvegicus in Greenland waters. Genetic analyses provided evidence for three cryptic species in samples that were morphologically identified as S. norvegicus. They were termed S. norvegicus-A, S. norvegicus-B, and S. norvegicus-giants. A few phenotypic features exist to identify adult S. norvegicus giants, but no characteristics have been identified for the two other cryptic species. The proposed cryptic species should be recognized in the management regime to ensure sustainable exploitation and conservation of Sebastes species in Greenland waters.

Navigational Aspects of Turboprop Operation on the North Atlantic

1957 ◽  
Vol 10 (1) ◽  
pp. 31-49
Author(s):  
J. E. D. Williams
Keyword(s):  
Sixteenth Century ◽  
Long Range ◽  
North Atlantic ◽  
Fuel Load ◽  
The North ◽  
The Status ◽  
The North Atlantic ◽  
Aircraft Type

If navigation were confined to the function of keeping a craft on a desired track, and estimating its progress periodically, then a long-range turboprop would present no features of navigational interest. Navigation, however, is supposed to encompass a wider field than this. In a famous sixteenth-century definition, ‘Navigation demonstrateth how, by the shortest good way, by the aptest direction, and in the shortest time, a sufficient ship between any two places may be conducted’. The economic realities of modern airliner operation give a new emphasis to those phrases ‘By the shortest good way, by the aptest direction, and in the shortest time’. A Britannia 310, for example, which will be the first, probably the cheapest, and possibly the smallest, long-range turbineengined airliner, costs about £1 million and is capable of producing a gross revenue of £1000 per hour. The sum of payload and fuel load is limited in most long-range cases by maximum take-off weight, and the fuel for one hour of flight is equivalent in weight to about 2 5 passengers and their baggage. It is not surprising in the circumstances that quite minor refinements of navigational technique are worth tens of thousands of pounds per aircraft per year, while major improvements can alter the status of an aircraft type as an instrument of transport. Such aircraft should be considered as acutely sensitive instruments to be operated precisely according to scientifically designed techniques.

scholarly journals From pup production to quotas: current status of harp seals in the Greenland Sea

2013 ◽  
Vol 71 (3) ◽  
pp. 537-545 ◽  
Author(s):  
Tor Arne Øigård ◽  
Tore Haug ◽  
Kjell Tormod Nilssen
Keyword(s):  
Population Size ◽  
North Atlantic ◽  
Population Model ◽  
Current Status ◽  
Total Abundance ◽  
The North ◽  
Production Estimate ◽  
Pagophilus Groenlandicus ◽  
The Status ◽  
The North Atlantic

Abstract Harp seals (Pagophilus groenlandicus) have been harvested for centuries in the North Atlantic. Estimating abundance and monitoring changes in population size are critical for the management of the species. In March 2012, the harp seal pup production was estimated from aerial photographic surveys over the whelping areas. A total area of 305 km2 was photographed and 6034 pups were counted on the photos. From this the total pup production estimate was 89 590 ( s.e. = 12 310, CV = 13.7%). The status of the stock was subsequently assessed by fitting a population model to the independent pup production estimate, the historical catch data, and the historical reproduction data. The 2013 total abundance (including pups) was estimated to be 627 410 (95% CI = 470 540–784 280) harp seals. We demonstrate how the model is used in assessment when exploring the effect of various catch scenarios on future predictions.

Part III Headquarters Agreements, 37 NATO International Military Headquarters

2018 ◽  
Author(s):  
Muñoz-Mosquera Andrés ◽  
Hartov Mette Prassé
Keyword(s):  
North Atlantic ◽  
Detailed Account ◽  
Military Operations ◽  
The North ◽  
The Status ◽  
The North Atlantic ◽  
Set Up

This Chapter describes the background and role of the Paris Protocol on the Status of International Military Headquarters set up pursuant to the North Atlantic Treaty and its supplementing agreements. It gives a detailed account of its application and continuing importance for military operations of the Alliance.

Sign in / Sign up

Export Citation Format

Share Document