Comparison between the catch composition of the French and ORE type beam trawls on deep-sea decapod crustaceans: implications for quantitative sampling of the deep-sea decapod biodiversity

Crustaceana ◽  
2009 ◽  
Vol 82 (5) ◽  
pp. 565-591 ◽  
Author(s):  
Pei-Chen Tsai ◽  
Hsin-Ming Yeh ◽  
Tin-Yam Chan ◽  
Benny Kwok Kan Chan
Keyword(s):  
Deep Sea ◽  
Decapod Crustaceans ◽  
Quantitative Sampling ◽  
Catch Composition

Adaptation and molecular evidence for convergence in decapod crustaceans from deep‐sea hydrothermal vent environments

2020 ◽  
Vol 29 (20) ◽  
pp. 3954-3969
Author(s):  
Jianbo Yuan ◽  
Xiaojun Zhang ◽  
Yi Gao ◽  
Xiaoxi Zhang ◽  
Chengzhang Liu ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Molecular Evidence ◽  
Decapod Crustaceans

Observations on the Compound Eyes of the Deep-Sea Ostracod Macrocypridina Castanea

1990 ◽  
Vol 148 (1) ◽  
pp. 221-233 ◽  
Author(s):  
M. F. LAND ◽  
D.-E. NILSSON
Keyword(s):  
Deep Water ◽  
Deep Sea ◽  
Compound Eyes ◽  
Decapod Crustaceans ◽  
Transverse Axis ◽  
Spontaneous Movements

Macrocypridina lives at depths of 800 m, where residual daylight is very weak. It has a pair of mobile apposition compound eyes with large lenses, wide rhabdoms and high acceptance angles, all of which contribute to a calculated sensitivity comparable with the superposition eyes of deep-water decapod crustaceans. The axes of the 27 ommatidia in each eye are not uniformly distributed in space, with a modest acute zone in the anteroventral region. Here the interommatidial angles are about 6°, compared with 20° at the rear of the eye. The eyes make two kinds of spontaneous movements: large slow rotations of up to 50° around a transverse axis, anda superimposed 2 Hz tremor with an amplitude of 5°.

scholarly journals Ichnology of Upper Cretaceous deep-sea thick-bedded flysch sandstones: Lower Istebna Beds, Silesian Unit (Outer Carpathians, southern Poland)

2012 ◽  
Vol 63 (2) ◽  
pp. 107-120 ◽  
Author(s):  
Jacek Rajchel ◽  
Alfred Uchman
Keyword(s):  
Deep Sea ◽  
Upper Cretaceous ◽  
Decapod Crustaceans ◽  
Southern Poland ◽  
Low Diversity ◽  
Outer Carpathians ◽  
Ophiomorpha Rudis

Ichnology of Upper Cretaceous deep-sea thick-bedded flysch sandstones: Lower Istebna Beds, Silesian Unit (Outer Carpathians, southern Poland) The Ophiomorpha rudis ichnosubfacies of the Nereites ichnofacies was recognized in thick- and very thick-bedded sandstones of the Lower Istebna Beds (Campanian-Maastrichtian), which were deposited mainly in deep-sea clastic ramps and aprons. It contains mainly Ophiomorpha rudis (produced by deeply burrowing decapod crustaceans) and rarely Zoophycos isp. and Chondrites isp. The impoverished Paleodictyon ichnosubfacies of the Nereites ichnofacies is present in the medium- and thin-bedded packages of flysch sandwiched between the thick- and very thick-bedded sandstones. They contain Chondrites isp., Phycosiphon incertum, Planolites isp., Arthrophycus strictus, Thalassinoides isp., Ophiomorpha annulata, O. rudis, Scolicia strozzii and Helminthorhaphe flexuosa. The relatively low diversity of this assemblage is influenced by limited areas covered by muddy substrate, which favours deep-sea tracemakers, and partly by a lowered oxygenation in the sediment.

The food and feeding of the deep-sea morid fish Lepidion eques (Gunther, 1887) in the Rockall Trough

1980 ◽  
Vol 60 (4) ◽  
pp. 1053-1059 ◽  
Author(s):  
J. Mauchline ◽  
J. D. M. Gordon
Keyword(s):  
Deep Sea ◽  
Stomach Contents ◽  
Minor Components ◽  
Decapod Crustaceans ◽  
Benthic Infauna ◽  
Sea Bed ◽  
Rockall Trough ◽  
Food And Feeding ◽  
Dietary Components

The stomach contents of Lepidion eques trawled at depths ranging from 500 to 1250 m on the Hebridean Terrace (56°-57° N, 9°-11° W) are analysed relative to size of fish, depth of habitat and season of the year. Of the 1281 fish examined, 47% had everted stomachs, 29% empty stomachs, 2% had food that was totally unrecognizable while 21% had food whose constituents could be identified. The principal dietary components are the epibenthic and hyperbenthic decapod crustaceans, although a wide variety of other organisms also occur as minor components. Benthic infauna and sessile epifauna are absent from the diet. L. eques therefore feed predominantly on organisms swimming immediately above the sea-bed or actively moving over it.

Species assemblages and community structure of deep-sea demersal ichthyofauna of the South-eastern Arabian Sea (SEAS)

2017 ◽  
Vol 98 (7) ◽  
pp. 1775-1781 ◽  
Author(s):  
M. S. Sileesh ◽  
K. Alphi ◽  
K. C. Harish ◽  
V. Viji
Keyword(s):  
Community Structure ◽  
Deep Sea ◽  
High Speed ◽  
Diversity Index ◽  
Diversity Indices ◽  
Species Assemblages ◽  
Total Catch ◽  
Future Studies ◽  
Catch Composition ◽  
Richness Index

Studies of species assemblages and community structure are of vital importance in the deep-sea realm. Data for the present study were collected during the research expedition of FORV ‘Sagar Sampada’ in the latitude 8.02°N and 11.58°N, longitude 74.16°E and 78.35°E. High Speed Demersal Trawl – Crustacean Version (HSDT-CV) was used for the operations at a depth of 200 and 1000 m. The total catch came to 2148.35 kg from 10 stations. An analysis of the catch composition was made. Total catch was dominated by Priacanthus hamrur (27.66%) followed by Neoepinnula orientalis (15.57%), Psenopsis cyanea (10.05%), Glyptophidium oceanium (3.55%), Lamprogrammus niger (3.17%), Narcine timlei (3.08%), Lamprogrammus sp. (2.6%), Pterigotrygla hemisticta (2.17%). About 76 species recorded from 22 orders were identified. The diversity indices, Cluster analysis, k-dominance plot were analysed using PRIMER v6 software. The diversity indices including Margalef richness index (d), Shanon index (log e2), Pielou's evenness index (J′) and Simpson diversity index (1 − λ) were calculated. Diversity indices were compared with the previous studies in the same area, and this can be a reference point for future studies.

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