Echinoidea of Oregon

1967 ◽  
Vol 24 (6) ◽  
pp. 1385-1401 ◽  
Author(s):  
James E. McCauley ◽  
Andrew G. Carey Jr.
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Strongylocentrotus Purpuratus ◽  
Outer Shelf ◽  
Shallow Waters ◽  
Outer Continental Shelf ◽  
Geographic Ranges ◽  
Dendraster Excentricus ◽  
Upper Slope

Ten species of echinoids are known to occur off Oregon. Three distinct bathymetric groups are recognized: Strongylocentrotus purpuratus, S. franciscanus, and Dendraster excentricus occur in shallow waters from intertidal down to about 65 m; S. echinoides occurs on the outer continental shelf, and Brisaster latifrons and Allocentrotus fragilis occur on the outer shelf and upper slope at depths of about 70–840 m; and Aëropsis fulva, Sperosoma giganteum, Urechinus loveni, and Ceratophysa rosea are found in deep water from depths of 2090 to 3000 m. Bathymetric ranges are extended for six species and geographic ranges are extended for five species.

scholarly journals BRIOZOOS CHEILOSTOMADOS DEL CARIBE COLOMBIANO

2016 ◽  
Vol 35 ◽  
Author(s):  
Paola Flórez Romero ◽  
Erika Montoya Cadavid ◽  
Javier Reyes Forero ◽  
Nadiezhda Santodomingo
Keyword(s):  
Continental Shelf ◽  
Marine Ecosystems ◽  
Soft Bottom ◽  
Marine Fauna ◽  
Geographic Ranges ◽  
The World ◽  
Growth Types ◽  
Soft Bottoms ◽  
Upper Slope

The Cheilostomes are the most diverse existent bryozoans group. Its species are commonly found in all the marine ecosystems around the world. In Colombia, however, information about them is scarce and limited to few localities. With the initiative of exploring the soft bottom biodiversity and completing the Colombian marine fauna inventories, INVEMAR-Macrofauna II exploration took place in March 2001, during which samples were collected on soft bottoms throughout the Colombian Caribbean from the continental shelf and the upper slope (20 – 500 m depth) by trawling. 62 species of Cheilostomes that belong to 39 families were found, 36 are first records for the Colombian Caribbean, 4 for the Great Caribbean and 1 for the Tropical West Atlantic. Bathymetric and geographic ranges are extended for 13 species. Taxonomical notes and images of the five species that are first records for the Greater Caribbean and the Tropical West Atlantic are included in this survey. It also includes remarks about the distribution, substrata, and growth types of Cheilostomata studied.

scholarly journals FORAMINIFERA CHECK LIST AND THE MAIN SPECIES DISTRIBUTION IN THE AVEIRO LAGOON AND ADJACENT CONTINENTAL SHELF (PORTUGAL)

2019 ◽  
Vol 4 (1) ◽  
pp. 1-52 ◽  
Author(s):  
Maria Virgínia Alves Martins ◽  
Johann Hohenegger ◽  
Fabrizio Frontalini ◽  
Cristina Sequeira ◽  
Paulo Miranda ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Distribution Patterns ◽  
Check List ◽  
Outer Continental Shelf ◽  
Depth Functions ◽  
Main Species ◽  
Components Analysis ◽  
Foraminíferos Bentónicos ◽  
Aveiro Lagoon ◽  
Upper Slope

This work is based on a compilation of benthic foraminiferal data collected in the Aveiro Lagoon and in the adjacent continental shelf and upper slope (center of Portugal). It intends to provide an overall analysis from transitional to the outer continental shelf of the occurrence and distribution of species in living and to present updated taxonomic data and illustrations of most of the species found in the in the Aveiro Lagoon and in the adjacent continental shelf including in total assemblages. Cluster analysis (CA) and Principal Components Analysis (PCA) interpreted as depth functions allow us to identify the main species in different ecoenvironments and sectors of the study area. The most unusual living assemblage was documented in the lagoon inlet under very strong tidal currents activity, composed mostly by the following species (both in living and total assemblages): Rotaliammina concava, Lepidodeuterammina ochracea, Quinqueloculina seminula, Gavelinopsis praegeri, Paratrochammina haynesi, Remaneica helgolandica and Remaneicella gonzalezi. The distribution patterns of some Trochamminidae and Remaneicidae species whose ecology and distribution pattern are poorly known, have proved to be a marker of more or less hydrodynamic and stable/unstable environments in coastal and transitional marine environments. OCORRÊNCIA DE FORAMINÍFEROS E DISTRIBUIÇÃO DAS PRINCIPAIS ESPÉCIES NA LAGOA DE AVEIRO E NA PLATAFORMA CONTINENTAL ADJACENTE (PORTUGAL)ResumoEste trabalho baseia-se numa compilação de dados foraminíferos bentónicos recolhidos na Laguna de Aveiro e na plataforma continental adjacente (centro de Portugal). Pretende efetuar uma análise geral da distribuição de espécies nas associações vivas e totais (vivas e mortas) na área de estudo, em função da profundidade. Pretende ainda apresentar dados taxonómicos e ilustrações da maioria das espécies encontradas na Laguna de Aveiro e na plataforma continental adjacente. A análise de agrupamento (CA) e a análise de componentes principais (PCA), em função da profundidade, permitem identificar as principais espécies em diferentes ecossistemas e setores da área de estudo. A associação viva mais invulgar foi encontrada na embocadura da Laguna de Aveiro, um ambiente sujeito a forte corrente de maré. Essa associação era composta principalmente pelas seguintes espécies (na associação viva e total): Rotaliammina concava, Lepidodeuterammina ochracea, Quinqueloculina seminula, Gavelinopsis praegeri, Paratrochammina haynesi, Remaneica helgolandica and Remaneicella gonzalezi. Os padrões de distribuição de algumas espécies de Trochamminidae e Remaneicidae, cuja ecologia e padrão de distribuição são pouco conhecidos, mostraram ser um marcador de ambientes mais ou menos hidrodinâmicos e de estabilidade/instabilidade do substrato em ambientes marinhos costeiros e de transição. Palavras-chave: Ecologia. Taxonomia. Imagens digitais. Análise Estatística. Ambientes Transicionais e Costeiros Marinhos.

Zonation of demersal fishes off Anvers Island, western Antarctic Peninsula

2015 ◽  
Vol 28 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Margaret O. Amsler ◽  
Joseph T. Eastman ◽  
Kathryn E. Smith ◽  
James B. Mcclintock ◽  
Hanumant Singh ◽  
...  
Keyword(s):  
Fish Fauna ◽  
Antarctic Fish ◽  
Abundant Species ◽  
Outer Shelf ◽  
Outer Continental Shelf ◽  
Absolute Abundance ◽  
Inner Shelf ◽  
Photographic Survey ◽  
Upper Slope ◽  
Demersal Fishes

AbstractThe Antarctic fish fauna from outer continental shelf/upper slope depths is under-sampled compared to that of the inner shelf, and there are limited quantitative data available on absolute abundance and taxonomic change with depth. A photographic survey of demersal fishes was conducted along a depth-gradient of 400–2099 m on the outer shelf and upper slope west of Anvers Island, Palmer Archipelago. A total of 1490 fishes were identified at least to the family level. Notothenioids composed 52.7% of absolute abundance and non-notothenioids 47.3%. The most abundant families were Nototheniidae (39.4%), followed by Macrouridae (28.9%), Zoarcidae (16.9%), and Channichthyidae (12.1%). The most abundant species were the notothenioidsLepidonotothen squamifrons(30.5%) andChionobathyscus dewitti(11.7%), and the non-notothenioidMacrourusspp. (29.5%). The absolute abundance of all fishes peaked at 400–599 m. Depths of maximum abundance were 400–599 m forL. squamifrons, 700–1499 m forMacrourusspp., and 900–1499 forC. dewitti. At 700–999 m the abundance shifted from primarily notothenioids to the non-notothenioidsMacrourusspp. and zoarcids. Fishes of the outer shelf and upper slope are not provincialized like those of the inner shelf and are circum-Antarctic.

scholarly journals First report on the occurrence of Sargassum Weed Fish Histrio histrio (Lophiliformes: Antennariidae) in Nigeria deep water, Gulf of Guinea

2021 ◽  
Vol 13 (7) ◽  
pp. 18899-18902
Author(s):  
Abdul-Rahman Dirisu ◽  
Hanson S. Uyi ◽  
Meshack Uyi
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Environmental Research ◽  
Research Vessel ◽  
Gulf Of Guinea ◽  
Outer Continental Shelf ◽  
First Report ◽  
Deep Waters ◽  
First Occurrence ◽  
Probable Occurrence

We report the first occurrence of Sargassum Weed Fish Histrio histrio at Bonga Field in Nigeria Outer Continental Shelf approximately 120 km south-east of Delta State in February 2014. At high tides and under difficulty, we sampled some seaweeds in the epi-pelagic realm using a secured standard plankton net to the environmental research vessel that was cruising at a dead speed (≤4 knots). Upon examination of the weeds we collected, one adult Sargassum Weed Fish along with two gelatinous fingerlings were realised. This finding suggests the probable occurrence of more population of Sargassum Weed Fish in their macro-habitat (the Sargassum seaweeds) which are abundantly bound in the Gulf of Guinea deep waters. The specimen was photographed on-board and preserved immediately in 10 % formalin solution for a 24-h period and was thereafter reprocessed, and permanently preserved with 70 % ethanol. We recommend a major study of the marine seaweeds and their colonisers amongst Gulf of Guinea member states.

Biogeography of continental shelf and upper slope fishes off El Salvador, Central America

2014 ◽  
Vol 95 (3) ◽  
pp. 611-622
Author(s):  
Claudia I. Fuentes ◽  
Enzo Acuña ◽  
Numa R. Hernández
Keyword(s):  
Cluster Analysis ◽  
Continental Shelf ◽  
El Salvador ◽  
Central America ◽  
Fish Community ◽  
Fish Assemblages ◽  
Central Zone ◽  
Outer Continental Shelf ◽  
Main Factor ◽  
Upper Slope

The present research provides detailed information on the geographic and bathymetric distributional patterns of fishes and describes the main species assemblages of the continental shelf and upper slope off El Salvador. The sampling was based on 673 bottom-trawl tows taken during research surveys from April to November 2003. The data analysis was based on presence-absence matrixes and was conducted with PRIMER 6 software. A total of 148 fish species were recorded during the study period: the families with the highest number of species were Sciaenidae (13) and Carangidae (10), and the highest percentages of occurrence were registered for Porichthys margaritatus (40.6%), Pontinus sp. (34.8%) and Monolene dubiosa (33.1%). The cluster analysis by depth showed three faunistic associations: (1) on the inner and part of the mid continental shelf (20–60 m), (2) one bathymetric stratum on the mid continental shelf (80–100 m), and (3) on the outer continental shelf and upper slope (120–240 m). The cluster analysis by geographic zones showed separation between three zones: Western, Central and Eastern Zones off El Salvador. The Central zone is characterized by a different fish community of mixed habitat, while the main factor that determined the fish assemblages on the continental shelf and upper slope was depth.

Late Ordovician (Katian) brachiopods from the Southern Uplands of Scotland: biogeographic patterns on the edge of Laurentia

2009 ◽  
Vol 100 (3) ◽  
pp. 253-274 ◽  
Author(s):  
Yves Candela ◽  
David A. T. Harper
Keyword(s):  
Northern Ireland ◽  
Deep Water ◽  
Late Ordovician ◽  
Outer Shelf ◽  
Biogeographic Patterns ◽  
Laurentian Margin ◽  
Upper Slope

ABSTRACTSome 40 brachiopod species are known from the localities of Kilbucho and Wallace’s Cast in the Kirkcolm Formation in the Northern Belt of the Southern Uplands of Scotland. The fauna is diverse despite the relatively small numbers of brachiopod specimens (c. 180) available for study. Much of the fauna was transported downslope and is locally preserved in obtrution deposits. It represents a broad census of outer shelf and upper slope palaeocommunities around this part of the Laurentian margin during the early Katian, and is dominated by relatively small plectambonitoid brachiopods. When compared with other circum-Iapetus assemblages, the brachiopods from the Southern Uplands compare most closely with those from the Bardahessiagh Formation, Pomeroy, Northern Ireland, rather than with adjacent, well-known faunas from the Girvan district, SW Scotland. These new data suggest that this part of the Southern Uplands was located in closer proximity to Pomeroy than Girvan, and located in deep-water environments similar to those in the upper parts of the Bardahessiagh Formation.

Sign in / Sign up

Export Citation Format

Share Document