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.

The first record of the short-beaked garfish Belone svetovidovi (Belonidae) in british waters

1992 ◽  
Vol 72 (2) ◽  
pp. 507-508 ◽  
Author(s):  
Silja E. Swaby ◽  
Geoffrey W. Potts ◽  
Alwyne Wheeler
Keyword(s):  
Atlantic Coast ◽  
First Record ◽  
The North ◽  
Marine Biological Association ◽  
Northern European ◽  
North Eastern ◽  
The North Sea ◽  
Eastern North Atlantic ◽  
Abundance And Distribution ◽  
Belone Belone

The capture of the short-beaked garfish,Belone svetovidovi Collette & Parin 1970, off the Cornish coast is of particular interest in that it represents an easterly extension to the known range of this species in the eastern North Atlantic, and the first record in British waters.In August 1990 seven garfish were angled, on mackerel bait, in Mount's Bay, Cornwall. The captor, Mr A.C. Cass, believing the garfish to be different from the common garfish,Belone belone (L.), sent the largest one to the laboratory of the Marine Biological Association for identification. The specimen was provisionally identified as the short-beaked garfish B. svetovidovi and later verified by one of us (A.W.). The other six specimens were not available for examination.Garfish, sometimes called needlefishes, have elongated bodies. Both upper and lower jaws are long and beak-like, with sharp teeth. They are epipelagic, feeding near the surface and are often observed leaping and skittering over the surface of the water. Only two species are recorded in the genus Belone in the north-eastern Atlantic.Belone belone (including subspecies) is commonly found off the European Atlantic coast as far north as Trondheim, Norway. It is also found in the North Sea, the southern Baltic seas, the Mediterranean and Black Sea where it is commercially exploited (Collette & Parin, 1986).Belone svetovidovi has only recently been distinguished from B. belone, and consequently its abundance and distribution are less well known. It was first identified in northern European waters by Dorman (1984,1987) from southern Ireland.

scholarly journals Protecting the North Sea: New research for biodiversity recovery.

2020 ◽  
Author(s):  
Oceana ◽  
Helena Álvarez ◽  
Allison L. Perry ◽  
Jorge Blanco ◽  
Silvia Garcia ◽  
...  
Keyword(s):  
North Sea ◽  
Marine Biodiversity ◽  
Legal Requirements ◽  
Marine Life ◽  
The North ◽  
Marine Habitats ◽  
Wide Range ◽  
The Face ◽  
The North Sea ◽  
New Research

To help fill gaps in knowledge about marine biodiversity in the North Sea, Oceana carried out two eight week research expeditions, in 2016 and 2017. Oceana’s surveys documented a wide range of habitats and species that are considered priorities for conservation, under national, EU, and international frameworks that recognise them as threatened and/or establish legal requirements for their protection.Oceana’s research has underscored the fact that much remains to be discovered about marine life on the seabed of the North Sea. Continued research is critical for informing efforts to recover biodiversity, an urgent priority in the face of the multiple, intense pressures facing the North Sea’s marine habitats and species.

scholarly journals Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020 ◽  
Vol 100 (3) ◽  
pp. 389-400
Author(s):  
Humberto F. M. Fortunato ◽  
Thierry Pérez ◽  
Gisele Lôbo-Hajdu
Keyword(s):  
Current Knowledge ◽  
Atlantic Coast ◽  
Marine Sponges ◽  
Eastern Coast ◽  
Morphological Description ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
The North ◽  
North Eastern

AbstractThe Order Suberitida is defined as a group of marine sponges without an obvious cortex, a skeleton devoid of microscleres, and with a deletion of a small loop of 15 base pairs in the secondary structure of the 28S rDNA as a molecular synapomorphy. Suberitida comprises three families and 26 genera distributed worldwide, but mostly in temperate and polar waters. Twenty species were reported along the entire Brazilian coast, and although the north-eastern coast of Brazil seems to harbour a rich sponge fauna, our current knowledge is concentrated along the south-eastern Atlantic coast. A survey was implemented along the northern coast of Brazil, and the collection allowed the identification of six species belonging to the Order Suberitida. Two of them are considered new to science: Suberites purpura sp. nov., Hymeniacidon upaonassu sp. nov., and four, Halichondria (Halichondria) marianae Santos, Nascimento & Pinheiro, 2018, Halichondria (H.) melanadocia de Laubenfels, 1936, Suberites aurantiacus (Duchassaing & Michelotti, 1864), and Terpios fugax Duchassaing & Michelotti, 1864, are re-described. Taxonomic comparisons are made for Tropical Western Atlantic species and type species of the four genera. Finally, an identification key for the Western Atlantic Suberites species is provided.

Illustrated Key to Ampelisca Species from the North-Eastern Atlantic

1988 ◽  
Vol 68 (4) ◽  
pp. 659-676 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Denise Bellan-Santini
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Intertidal Zone ◽  
Atlantic Coast ◽  
The North ◽  
North Eastern ◽  
The Mediterranean

The genus Ampelisca comprises more than 150 species and is one of the more important benthic genus of marine amphipods. New species are regularly added (Barnard & Agard 1986; Bellan-Santini & Marques, 1986; Goeke, 1987). Ampelisca are found from the intertidal zone to abyssal depths but most of them live on the continental shelf. In spite of many studies, it is often difficult to distinguish some species which are morphologically similar. In the last ten years, twenty-two species have been described from the north-eastern Atlantic (BellanSantini & Kaïm-Malka, 1977; Bellan-Santini & Dauvin, 1981, 1986; Dauvin & Bellan-Santini, 1982, 1985; Bellan-Santini & Marques, 1986). Materials come from MNHN of Paris collection, collected by Chevreux (1894–1924) (Dauvin & Bellan-Santini, 1985, 1986) and specimens collected during the last 25 years. All these new species are described from the Atlantic coast from northern Brittany to the Sahara and from the Mediterranean Sea.

Age and Growth of North Sea Echinoids

1985 ◽  
Vol 65 (3) ◽  
pp. 583-588 ◽  
Author(s):  
A. A. T. Sime ◽  
G. J. Cranmer
Keyword(s):  
Shallow Water ◽  
North Sea ◽  
Age And Growth ◽  
Eastern Area ◽  
The North ◽  
Small Variety ◽  
North Eastern ◽  
The North Sea ◽  
Northern North Sea

The genus Echinus is common throughout the entire northern North Sea. Echinus esculentus L. predominates in the shallow water off the eastern Scottish coast down to 100 m, while the small variety of Echinus acutus var. norvegicus (Düben and Koren) is rarely found in depths of less than 100 m and is most commonly located in the north-eastern area of the North Sea (Cranmer, 1985).

scholarly journals Taxonomy and Ecology of Sympatric Ampelisca Species (Crustacea, Amphipoda) From the Strait of Gibraltar to the Strait of Dover, North-Eastern Atlantic

2021 ◽  
Vol 8 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Leandro Sampaio ◽  
Ana Maria Rodrigues ◽  
Victor Quintino
Keyword(s):  
Continental Shelf ◽  
Sea Water ◽  
Atlantic Coast ◽  
Coarse Sand ◽  
Strait Of Gibraltar ◽  
The North ◽  
Atlantic Province ◽  
Regional Area ◽  
North Eastern ◽  
Sand And Gravel

The Ampeliscidae Kröyer, 1842 is amongst the most diverse amphipod families; it comprises four genera, Ampelisca being the richest with more than 200 species. The Ampelisca genus presents high morphological homogeneity and the identification of the species by ecologists remains difficult. Ampelisca are also characterized by a high degree of sympatry, a rare situation in amphipods, and in this study we report up to nine species coexisting at the same site. Recent benthic sampling and publications, namely on the Portuguese continental shelf and the English Channel, permit to revisit the available data on the taxonomy and propose an updated species identification key, as well as the distribution and ecology of the 40-recorded Ampelisca species along the North Eastern Atlantic coast, from the Strait of Gibraltar, in the South, to the Strait of Dover, in the North. The data allow discussing on the sympatry and syntopy of such diverse amphipod family with the co-occurrence of several species at various scales of observations, from the wider regional area, to the narrower local habitat. Two Ampelisca species were recorded exclusively on hard bottom, while the other tend to inhabit specific types of soft bottom, ranging from deep mud to shallow coarse sand and gravel, with a preference for continental shelf muddy and sandy habitats. A future sea water temperature increase scenario could modify the species geographical distribution and reproductive cycle, in this temperate North-eastern Atlantic province.

scholarly journals Evidence of a relationship between weight and total length of marine fish in the North-eastern Atlantic Ocean: physiological, spatial and temporal variations

2016 ◽  
Vol 98 (3) ◽  
pp. 617-625 ◽  
Author(s):  
Kélig Mahé ◽  
Elise Bellamy ◽  
Jean Paul Delpech ◽  
Coline Lazard ◽  
Michèle Salaun ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Sea ◽  
Temporal Variations ◽  
Bay Of Biscay ◽  
English Channel ◽  
Total Length ◽  
The North ◽  
Eastern Atlantic Ocean ◽  
North Eastern ◽  
The North Sea

Weight–Body Length relationships (WLR) of 45 fish species (37 Actinopterygii and eight Elasmobranchii) were investigated. A total of 31,167 individuals were caught and their biological parameters measured during the four quarters from 2013 to 2015, on five scientific surveys sampling the North-eastern Atlantic Ocean from the North Sea to the Bay of Biscay (ICES Divisions IVb, IVc, VIId, VIIe, VIIg, VIIh, VIIj, VIIIa and VIIIb). Among 45 tested species, all showed a significant correlation between total length (L) and total weight (W). The influence of sex on WLR was estimated for 39 species and presented a significant sexual dimorphism for 18 species. Condition factor (K) of females was always higher than for males. Moreover, a spatial effect on the WLR according to five ecoregions (the Bay of Biscay, the Celtic Sea, the Western English Channel, the Eastern English Channel and the North Sea), was significant for 18 species among 38 tested species. The temporal effect was tested according to components (year and quarter/season). The seasonality effect on WLR is more frequently significant than the year especially for the Elasmobranchii species, and can be related to the spawning season. Finally, depressiform species (skates, sharks and flatfish) are characterized by positive allometric growth, whereas there is no such clear pattern regarding roundfishes growth, whatever their body shape is.

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