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a) Eustomias obscurus; b) Stomias boa; c) Chauliodus sloani; d) Malacosteus niger; e) Photostomias guernei. (Photo credits: a) Menezes; b) Shale; c) and d) Sutton; e) Orlov). (MAR-ECO labels are 4 x 8 cm).
Source publication
Records of the fishes from the northern Mid-Atlantic Ridge (MAR) (41⁰N - 60⁰N) sampled
during two research cruises conducted in summer 2004 on the R/V G.O. Sars and M/S Loran
are presented. The cruises were major sampling efforts carried out for the MAR-ECO project,
i.e. the Census of Marine Life field project entitled “Patterns and Processes of th...
Citations
... Although the specimen is only identified to genus level, as Lepidion sp., and no size and depth data are provided, its morphology and colouration are very similar to those of the juvenile specimen analysed. Therefore, and considering that L. guentheri is listed among the MAR-ECO species (Porteiro et al. 2017), the identity of this figure could also be that of a juvenile of L. guentheri. ...
The occurrence of a small specimen of Lepidion guentheri (Giglioli, 1880) (Gadiformes: Moridae) with an unusual dark colouration in the Porcupine Bank is reported. A single specimen of 114.2 mm of total length was caught in 2023 in a bottom trawl at a depth of 1168 m. The specimen was initially identified morphologically and later confirmed by molecular taxonomy using DNA barcoding. Its dark colouration pattern is discussed in the context of the known colouration patterns. Although a complete melanosis is possible, ontogenetic colouration is proposed as the most likely cause. DNA barcoding suggests the presence of Lepidion guentheri in the southern Indian and southwestern Pacific Oceans.
... Third, we identify species with expanded northern ranges, far outside their current geographic distribution. Notably, several of these observations, especially those within the marine environment, have clear parallels to current shifts in species distributions as a response to climate warming (42)(43)(44). Below, we discuss the biological and climatic implications of the animals identified in each of the recognized time periods (layers) and the entire Nygrotta assemblage. ...
... Past distributional shifts of warm water fish species have also been identified from faunal records in Sweden during the Late Holocene (86). Notably, this past northward shift of Seriola sp. is analogous to modern observations of Seriola dumerili (greater amberjack) moving north into the English Channel (42,44). Avifauna at Nygrotta during the late HTM show a switch from waterfowl to landfowl species such as black grouse (L. ...
Paleo-archives are essential for our understanding of species responses to climate warming, yet such archives are extremely rare in the Arctic. Here, we combine morphological analyses and bulk-bone metabarcoding to investigate a unique chronology of bone deposits sealed in the high-latitude Storsteinhola cave system (68°50′ N 16°22′ E) in Norway. This deposit dates to a period of climate warming from the end of the Late Glacial [~13 thousand calibrated years before the present (ka cal B.P.)] to the Holocene thermal maximum (~5.6 ka cal B.P.). Paleogenetic analyses allow us to exploit the 1000s of morphologically unidentifiable bone fragments resulting in a high-resolution sequence with 40 different taxa, including species not previously found here. Our record reveals borealization in both the marine and terrestrial environments above the Arctic Circle as a naturally recurring phenomenon in past periods of warming, providing fundamental insights into the ecosystem-wide responses that are ongoing today.
... It is believed (Chernova 2015;Chernova et al. 2015) that in the Siberian Arctic, this species occurs at depths of more than 200 m in the zone influenced by a relatively warm current of Atlantic origin water passing eastwards along the edge of the shelf and the continental slope of the Arctic Ocean. Our capture fully corresponds to these ideas and is within the range of habitat depths known for the species under consideration (Porteiro et al. 2017;Mecklenburg et al. 2018;Orlov et al. 2022). ...
... Finally, we focused on the location of the S. microcephalus specimen from the waters of the Mid-Atlantic Ridge (MAR) in the same clade together with S. pacificus and S. antarcticus. The MAR specimen (Fig. 5) was identified by its external morphological characters as a Greenland shark (Fossen et al. 2008;Porteiro et al. 2017), and the data on its COI sequence were subsequently transferred to GenBank, where it is available under the species name S. microcephalus (MAECO244-06). However, the composition of the COI nucleotide sequence of this specimen fully corresponds to that of S. pacificus, which has already been highlighted by Walter et al. (2017). ...
The Greenland shark Somniosus microcephalus is the most northern and cold-water shark, longest-lived vertebrate, and species at risk. A single specimen of this species, 210 cm in length and 71 kg in weight, was captured for the second time in the Laptev Sea (Siberian Arctic, Russia). Species identification was confirmed by examination of the main morphometric characters and DNA barcoding using the COI mtDNA gene. This species is widely distributed in the North Atlantic, but records in the Arctic Ocean were limited to the Canadian and Greenland coasts, White, Barents, and Kara seas. In the Laptev Sea, the Greenland shark was previously known from a single record, which was not confirmed genetically. Recent records in the Siberian Arctic are likely associated with the eastward extension of warmer waters of the North Atlantic current to this area due to recent climate change and warming in the region.
... Цель работы -изучить липидный профиль мышечной ткани представителей миктофовых (Notoscopelus kroyeri и Symbolophorus veranyi) и стомиевых (Chauliodus sloani, Stomias boa, Malacosteus niger и Borostomias antarcticus) рыб, обитающих в Северной Атлантике в диапазоне глубин соответ-ственно 0-3071, 0-2308, 200-4700, 0-3527, 890-1450 и 0-3527 м (Porteiro et al., 2017;Orlov, Tokranov, 2019). ...
Впервые исследован качественный и количественный липидный профиль (общие липиды, а также полярные и неполярные липиды) мышечной ткани шести видов мезопелагических рыб, являющихся представителями широко распространённых в Мировом океане двух глубоководных семейств – Stomiidae и Myctophidae. Для исследованных видов установлена видоспецифичность накопления
липидов, указывающая на различия в механизмах компенсаторных реакций. Основной формой запасания липидов у изученных видов являются триацилглицерины. Однако у Borostomias antarcticus отмечено также накопление эфиров холестерина и восков – липидов, характерных для вертикальных мигрантов. Выявлены отличительные особенности миктофовых и стомиевых, связанные с накоплением холестерина и вариациями в содержании разных фосфолипидных фракций, что указывает на использование рыбами этих семейств различных механизмов регуляции и поддержания физико-химического состояния (проницаемость, жидкостность) биологических мембран при изменении комплекса факторов среды (температуры, солёности, гидростатического давления, специфического
фотопериода) с увеличением глубины обитания.
... Ma) [12,[14][15][16], and is represented by nine valid species that live in deep waters over the continental slopes and seamounts around the world [12,[14][15][16]. Schmidt's cod, L. schmidti ( Figure 1A), is a rare and poorly studied member of the genus [12,13], found in the North Atlantic, southwestern Indian Ocean, and northern and southwestern Pacific [16][17][18][19]. On the Emperor Seamounts, it is found alongside its congener, L. inosimae [14,15]. ...
This study presents the first data of growth and age of Schmidt’s cod Lepidion schmidti, a rare and poorly studied member of the Moridae family (Gadiformes, Teleostei). The research was focused
on the Emperor Seamounts area with the aim of investigating the age, growth rates, and longevity of this species. The analysis involved examining annual growth increments on sagittal otoliths. Data were taken from longline catches in 2014 and 2016, resulting in the collection of 140 individuals and the use of 70 otoliths for age determination. The results revealed that Schmidt’s cod can live for up to 49 years, with a mean age of 31.5 years in the catches. The relationship between body weight and total length was described by a power function, indicating positive allometric growth. The most suitable growth model for this species was determined to be the Von Bertalanffy growth equation.
These results provide valuable insights to add to the limited knowledge of growth and age in the Moridae family and emphasize the long lifespan and slow growth of Schmidt’s cod.
... There is worldwide distribution in tropical to temperate and subarctic seas, with adults between 0 and 4992 m range with optimal depths 500-2000 m (Orlov and Tokranov 2019). In the North Atlantic, its range extends from Greenland (rare) and Iceland to the equatorial waters (Porteiro et al. 2017). In the Western Atlantic, it occurs from St. Georges Bank to Falkland Islands (McEachran and Fechhelm 1998). ...
A taxonomic revision of Anoplogaster cornuta (Trachichthyiformes, Anoplogastridae) based on specimens from the western
North Atlantic is presented. Nineteen specimens were captured on Flemish Cap, western North Atlantic, by scientific surveys.
Identification was carried out by integrative taxonomy, combining examination of morphological and molecular characters
(DNA barcoding). Morphological examination confirmed several hitherto questionable taxonomic characters of the species,
such as the presence of 8–9 branchiostegal rays and 3–5 fang-like teeth on the lower jaw. As a result of the molecular analysis,
19 new sequences of cytochrome c oxidase subunit 1 COI were added to molecular repositories. DNA barcoding supports
the morphological identification of the specimens of A. cornuta from the western North Atlantic, and it also confirms the
current status of a single species with a worldwide distribution. The combination of classical and molecular taxonomy has
been useful for the delimitation and characterization of this deepwater species, contributing to a better understanding of its
intraspecific morphological and molecular variability.
... Atlantic from south of the equator to Iceland and Greenland, including along the mid-Atlantic ridge (Pietsch 2009;Porteiro et al. 2017). ...
Fifteen specimens representing nine species of ceratioid fishes (Lophiiformes: Ceratioidei) were caught in Flemish Cap and Grand Banks of the western North Atlantic: Ceratias holboelli Krøyer, 1845 (Ceratiidae), Melanocetus murrayi Günther, 1887
(Melanocetidae), Leptacanthichthys gracilispinis (Regan, 1925), Dolopichthys karsteni Leipertz & Pietsch, 1987, Dolopichthys pullatus Regan & Trewavas, 1932, Oneirodes eschrichtii Lütken, 1871, Oneirodes macrosteus Pietsch 1974 and Oneirodes
carlsbergi (Regan & Trewavas, 1932) (Oneirodidae), and Linophryne cf. brevibarbata Beebe, 1932 (Linophrynidae). Identification was carried out by means of integrative taxonomy, combining the examination of morphological and molecular characters (DNA barcoding). The analysis showed two morphological types of D. pullatus distinguishable by the shape and morphology of the esca and the number and size of the teeth. The occurrence of Oneirodes carlsbergi represents the northernmost record in the western Atlantic. As results of the molecular analysis, 15 new ceratioid sequences were added to molecular repositories, two of them, O. carlsbergi and Linophryne cf. brevibarbata for the first time. The comparison of some nucleotide sequences shows new relationships between the genera Bertella and Dolopichthys, and also makes it possible to correct some of the erroneous assignments made in the databases. The combination of classical and molecular taxonomy has been useful for the delimitation and characterisation of these ceratioid species, contributing to a better understanding of their distribution and inter- and intraspecific variability.
... It is widely distributed in tropical and temperate parts of Atlantic and Pacific Oceans but absent in the eastern tropical Pacific Ocean; specimens from the Indian Ocean, previously considered a separate subspecies, are now considered to belong to a different species. In the North Atlantic, M. atlantica is found from Greenland and Iceland to central equatorial waters, being rare or absent in central tropical waters and the western Caribbean Sea [18]. Only two specimens of 21 and 42 cm TL have been previously reported in Galician waters, at a depth of 764 and 892 m, respectively, in the Bank of Galicia [19]. ...
Simple Summary: The family Paralepididae is currently composed of an undetermined number of small to medium-sized, very elongated and slender aulopiform fishes distributed throughout the world, which makes it taxonomically complex. The genus Magnisudis is a poorly characterized group of paralepidid fishes with three recognized species. In the present study, we analyze DNA sequences deposited in public repositories to infer the taxonomic composition of the genus Mag-nisudis and its relationships with other taxonomic groups within the family Paralepididae. Morphological and molecular evidence support the identification of the specimen captured close to Galician coast (NW Spain) as Magnisudis atlantica. The feeding and reproductive phase of this specimen are studied and considered according to current knowledge of the species. Abstract: One specimen of the duckbill barracudina Magnisudis atlantica of 402 mm TL was caught in a shallow coastal area in Galician waters, northwest of Spain. Morphometric and meristic parameters along with DNA barcoding, based on cytochrome c oxidase subunit I, were used to confirm the specimen identity. Neighbor-joining analysis of nominal sequences of the genus Magni-sudis obtained from the Barcode of Life Data System indicates the presence of six representative groupings of potential species, in contrast to the three that are currently recognized as valid. The stomach contents showed remains of digested crustaceans, tentatively identified as Euphausiids. Histological examination of the gonads revealed the specimen to be an immature female with oocytes at the primary growth stage, indicative of a lack of hermaphroditism. The results add new biological and taxonomic data that contribute to improved understanding of these poorly characterized , mainly deep-water species, demonstrating, once again, the effectiveness of DNA barcoding for identifying deep-sea fishes and characterizing their genetic differences.
... Worldwide distribution in tropical to temperate and subarctic seas, with adults between 75 and 5,000 m depth, juveniles at 45-3,100 m and larvae at 2 m and more (Kotlyar, 2003). In the North Atlantic, its range extends from Greenland (rare) and Iceland to the equatorial Waters (Porteiro et al., 2017). In the Western Atlantic, occurs from St. Georges Bank to Falkland Islands (McEachran and Fechhelm, 1998). ...
... Finally, we categorized each taxon as "Mesopelagic", "Non-mesopelagic" or "Unknown". Mesopelagic taxa include fish, cephalopods, crustaceans, and gelatinous organisms inhabiting the mesopelagic zone (200-1000 m depth) [47][48][49] . Non-mesopelagic taxa encompass benthic and pelagic organisms that do not use the mesopelagic zone, as well as elasmobranchs, marine mammals, seabirds and marine turtles. ...
Mesopelagic organisms play a crucial role in marine food webs, channelling energy across the predator-prey network and connecting depth strata through their diel vertical migrations. the information available to assess mesopelagic feeding interactions and energy transfer has increased substantially in recent years, owing to the growing interest and research activity in the mesopelagic realm. However, such data have not been systematically collated and are difficult to access, hampering estimation of the contribution of mesopelagic organisms to marine ecosystems. Here we present Mesoptroph, a georeferenced database of diet, trophic markers, and energy content of mesopelagic and other marine taxa compiled from 203 published and non-published sources. MesopTroph currently includes data on stomach contents, carbon and nitrogen stable isotopes, major and trace elements, energy density, fatty acids, trophic positions, and diet proportion estimates for 498 species/genera. MesopTroph will be expanded with new data emerging from ongoing studies. Mesoptroph provides a unique tool to investigate trophic interactions and energy flow mediated by mesopelagic organisms, and to evaluate the ecosystem services of this community.
