Identification of deep water lantern sharks (Chondrichthyes: Etmopteridae) using morphometric data and multivariate analysis

2008 ◽  
Vol 88 (1) ◽  
pp. 199-204 ◽  
Author(s):  
Rui Coelho ◽  
Karim Erzini
Keyword(s):  
Multivariate Analysis ◽  
Sexual Dimorphism ◽  
Deep Water ◽  
Species Level ◽  
Morphometric Data ◽  
Morphometric Traits ◽  
The North ◽  
North Eastern

Taxonomic distinction to species level of deep water sharks is complex and often impossible to achieve during fisheries-related studies. The species of the genus Etmopterus are particularly difficult to identify, so they often appear without species assignation as Etmopetrus sp. or spp. in studies, even those focusing on elasmobranchs. During this work, the morphometric traits of two species of Etmopterus, E. spinax and E. pusillus were studied using 27 different morphological measurements, relatively easy to obtain even in the field. These measurements were processed with multivariate analysis in order to find out the most important ones likely to separate the two species. Sexual dimorphism was also assessed using the same techniques, and it was found that it does not occur in these species. The two Etmopterus species presented in this study share the same habitats in the overlapping ranges of distribution and are caught together on the outer shelves and slopes of the north-eastern Atlantic.

Verruca stroemia and Verruca spengleri (Crustacea: Cirripedia): distribution in the north-eastern Atlantic and the Mediterranean Sea

2003 ◽  
Vol 83 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Paulo S. Young ◽  
Helmut Zibrowius ◽  
Ghazi Bitar
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Geographic Distribution ◽  
Deep Water ◽  
Southern Spain ◽  
The Black Sea ◽  
The North ◽  
North Eastern ◽  
The Mediterranean ◽  
Gorringe Bank

The geographic distribution of Verruca stroemia and V. spengleri are reviewed. Verruca stroemia ranges from the White, Barents, Norwegian, and North Seas south to Portugal to the Algarve and to Gorringe Bank. All of the records of this species from the Mediterranean Sea are considered to be V. spengleri. Verruca spengleri occurs in the Azores and Madeira archipelagos, in southern Spain (Cádiz), throughout the Mediterranean Sea from Gibraltar to Lebanon, and in the Black Sea. But a distinct deep-water Verruca species seems to occur in the deep Mediterranean.

scholarly journals Lithistid Demosponges of Deep-Water Origin in Marine Caves of the North-Eastern Mediterranean Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Andrzej Pisera ◽  
Vasilis Gerovasileiou
Keyword(s):  
Deep Water ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Western Mediterranean ◽  
Elevated Concentration ◽  
The North ◽  
Deep Waters ◽  
Marine Caves ◽  
North Eastern ◽  
Tropical Areas

Desmas-bearing demosponges known as lithistids have heavily silicified skeleton and occur typically in bathyal environments of warm and tropical areas but may be found in certain shallow marine caves. Here we report, for the first time two lithistid species, i.e., Neophrissospongia endoumensis, and N. cf. nana, that were earlier known from Western Mediterranean marine caves, from four marine caves in the north-eastern Mediterranean, and their congener Neophrissospongia nolitangere from deep waters (ca. 300 m) of the Aegean Sea. All marine caves, and sections within these caves, where lithistids occur, have freshwater springs. We interpret this surprising association between lithistids and freshwater input by elevated concentration of silica in water in cave sections where such springs occur, being 8–11 times higher in comparison with shallow water outside caves, and comparable to that of deep waters, that promoted lithistids’ development. One of the studied caves harbored an abundant population of N. endoumensis which formed large masses. The age estimation of these lithistids, based on known growth rate of related deep-water sponges, suggest that they could be approximately 769–909 years old in the case of the largest specimen observed, about 100 cm large. These sponges could have colonized the caves from adjacent deep-water areas not earlier than 7,000–3,000 years ago, after the last glaciation, because earlier they were emerged. High variability of spicules, especially microscleres, and underdevelopment of megascleres may be related to silicic acid concentration.

scholarly journals Multivariate analysis of body morphometric traits in conjunction with performance of reproduction and milk traits in crossbred progeny of Murrah × Jafarabadi buffalo (Bubalus bubalis) in North-Eastern Brazil

PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0231407
Author(s):  
Breno Araújo de Melo ◽  
Alberto de Gusmão Couto ◽  
Fabiane de Lima Silva ◽  
Kuang Hongyu ◽  
Filipe Chagas Teodózio de Araújo ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Bubalus Bubalis ◽  
Morphometric Traits ◽  
Milk Traits ◽  
Eastern Brazil ◽  
North Eastern

A new genus and a new species of Tropidopolinae (Orthoptera: Acrididae) from India

ENTOMON ◽  
2019 ◽  
Vol 44 (3) ◽  
pp. 191-196
Author(s):  
Mohd. Imran Khan ◽  
Mohd. Kamil Usmani
Keyword(s):  
New Species ◽  
New Genus ◽  
Species Level ◽  
Female Genitalia ◽  
Eastern Region ◽  
New Genus And Species ◽  
Male And Female ◽  
The North ◽  
North Eastern ◽  
A New Species

A new genus Neooxyrrhepes gen. n. with a new species Neooxyrrhepes meghalayensis n. from Meghalaya, a state of the North Eastern region of India. Description and illustrations of the new genus and species are given. A key to the genera of subfamily Tropidopolinae from North Eastern states of India is also provided. Additonally the characters of male and female genitalia at generic and species level are also given.

Late quarterly paleooceanology of the Norwegian Sea on the basis of analysis of benthic foraminifers

2020 ◽  
pp. 34-42
Author(s):  
L. A. Kireenko ◽  
L. F. Kopaevich ◽  
A. G. Matul
Keyword(s):  
Deep Water ◽  
Benthic Foraminifera ◽  
Research Vessel ◽  
Benthic Foraminifers ◽  
Norwegian Sea ◽  
The North ◽  
North Eastern ◽  
Greenland Basin ◽  
North Eastern Part

Deep-water cores selected at AMK 5536 and 5524 stations on the 68th cruise of the research vessel «Academik Mstislav Keldysh» from the north-eastern part of the Norwegian-Greenland basin were investigated by sedimentological and micropaleontological methods. Changes in benthic foraminifera communities in the Norwegian Sea, their changes in time, which make it possible to use paleooceanological reconstructions and associate them with marine isotope stages are considered.

scholarly journals Coverage and correlates of health insurance in the north-eastern states of India

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Moirangthem Hemanta Meitei ◽  
Haobijam Bonny Singh
Keyword(s):  
Logistic Regression ◽  
Multivariate Analysis ◽  
Health Insurance ◽  
Eastern Region ◽  
Content Type ◽  
The North ◽  
North Eastern ◽  
Health Insurance Providers ◽  
Socioeconomic And Demographic Factors ◽  
The Impact

PurposeThe paper aims to analyze the coverage of health insurance and its correlates in the north-eastern region of India.Design/methodology/approachThe study accessed the raw data of the National Family Health Survey (NFHS-4) (2015–16), which was an extensive, multiround survey conducted in a representative sample of households throughout India, which included socioeconomic, demographic and information on coverage of health insurance of any member of the household. The multivariate analysis of logistic regression was adopted to find the correlates of health insurance for all the eight (8) north-eastern states of India.FindingsThe results observed that among the north-eastern states, the coverage of health insurance was highest in Arunachal Pradesh (59%) followed by Tripura (58%), Mizoram (47%) surpassing the all India level of 27%, whereas the lowest was in Manipur (4%) followed by Nagaland (6%) and Assam (10%). The multivariate analysis of logistic regression found that the socioeconomic and demographic factors, households with a bank account and below poverty line (BPL) cardholders played a significant role in the coverage of health insurance in the north-eastern states of India.Research limitations/implicationsThe study focuses only on the coverage and correlates of health insurance. Further evaluation studies on each scheme of the social health insurance are needed for proper assessment of the health insurance schemes in the region.Practical implicationsThere has been evidence around the world (South Korea, Taiwan and Thailand) that health insurance could be a protective shield from the entrapment into poverty due to high health expenditure. The NFHS-4 put up the finding that in the north-eastern part of India, the coverage of health insurance had been low. This implied that the region could fall into poverty due to high medical expenses on health. Taking account of multiple health insurance providers, risk pooling and consolidation of health insurance providers have become the need of the hour.Originality/valueThe study is different from other studies of health insurance since it covered all the eight (8) north-eastern states of India, which are ethnically, culturally and historically distinct from the rest of India in general and within the region and states in particular and examines the impact of each of the independent variables with the dependent variables. The study has shown that the variation in health insurance coverage associated with socioeconomic and other household-level demographic attributes (although not very strong).

Taxonomic review of the genus Opaliopsis (Gastropoda: Nystiellidae) from Brazil, with description of a new species

2011 ◽  
Vol 91 (7) ◽  
pp. 1561-1566 ◽  
Author(s):  
Bruno Garcia Andrade ◽  
Paulo Márcio Santos Costa ◽  
Alexandre Dias Pimenta
Keyword(s):  
New Species ◽  
Deep Water ◽  
Brazilian Coast ◽  
Western Atlantic ◽  
The North ◽  
North Eastern ◽  
Deep Water Species ◽  
First Time ◽  
A New Species ◽  
Water Species

The genus Opaliopsis from Brazil is revised based on three deep-water species. Opaliopsis atlantis (Clench & Turner, 1952) is confirmed as occurring in north-eastern and south-eastern localities. Opaliopsis opalina (Dall, 1927) is reported for the first time in the south-western Atlantic. A new species, Opaliopsis cearense, is described from the north-eastern Brazilian coast, and is distinguished by its large number of fine spiral cords per teleoconch whorl.

Morphological variation in Acrossocheilus hemispinus (Teleostei: Cyprinidae: Barbinae), with comments on its taxonomic status

Zootaxa ◽  
2010 ◽  
Vol 2684 (1) ◽  
pp. 45 ◽  
Author(s):  
LE-YANG YUAN ◽  
E ZHANG
Keyword(s):  
Multivariate Analysis ◽  
Sexual Dimorphism ◽  
Morphological Variation ◽  
Food Preferences ◽  
Taxonomic Status ◽  
Morphometric Data ◽  
Morphometric Characters ◽  
Body Coloration ◽  
Morphological Distinction

Differences in coloration and morphology between two subspecies of Acrossocheilus hemispinus were investigated based on museum-stored and freshly-caught specimens. There are marked differences in the coloration of either juveniles or adults, and in sexual dimorphism, between A. h. hemispinus and A. h. cinctus. Multivariate analysis of morphometric data too, shows the two taxa to be distinguishable from each other. Differences in body coloration and morphometric characters coincide with those of the mouthpart structure and the coiling pattern of the intestine in A. h. hemispinus and A. h. cinctus. Morphological distinction, coupled with different habitat and food preferences, supports the taxonomic elevation of the two hitherto subspecific populations of A. hemispinus to species.

Caryophyllia sarsiae n.sp. and other recent deep-water Caryophyllia (Scleractina) previously referred to little-known fossil species (C. arcuata, C. cylindracea)

1974 ◽  
Vol 54 (4) ◽  
pp. 767-784 ◽  
Author(s):  
H. Zibrowius
Keyword(s):  
Deep Water ◽  
Deep Sea ◽  
World Wide ◽  
Fossil Species ◽  
The North ◽  
North Eastern ◽  
The World ◽  
Deep Water Species ◽  
Different Depths ◽  
Water Species

Three deep-water species of the north-eastern Atlantic have been studied: Caryophyllia abyssorum Duncan, 1873, C. calveri Duncan, 1873, C. sarsiae n.sp. Of these only C. abyssorum has not been found in the Mediterranean. In the north-eastern Atlantic these species appear characteristic of somewhat different depths, but occasionally can be found together. Obtained by early deep-sea expeditions (“Porcupine” cruise of 1870, cruises of Prince Albert I of Monaco), all three species have been previously confused and assigned, chiefly, to the little-known fossil species C. arcuata and C. cylindracea. In order to show the world-wide confusion about C. arcuata, some other records, from Cape Verde Islands to Japan through Antarctica, are quoted.

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