A New Type of Light Organ in the Deep-Sea Fish Opisthoproctus

Nature ◽  
1958 ◽  
Vol 181 (4612) ◽  
pp. 862-863 ◽  
Author(s):  
E. BERTELSEN
Keyword(s):  
Deep Sea ◽  
Light Organ ◽  
New Type ◽  
Sea Fish

‘Yellow lens’ eyes of a stomiatoid deep-sea fish, Malacosteus niger

1982 ◽  
Vol 215 (1201) ◽  
pp. 481-489 ◽  
Keyword(s):  
Optical Properties ◽  
Deep Sea ◽  
Pigment Epithelium ◽  
Light Organ ◽  
Ecological Significance ◽  
Bright Yellow ◽  
Retinal Tapetum ◽  
Two Peaks ◽  
Sea Fish ◽  
Chemical Evidence

Bright yellow lenses were found in the eyes of the stomiatoid deep-sea fish, Malacosteus niger Ayres. The optical properties of the yellow lens and the retinal specializations in the eyes were examined. Absorption spectra of the yellow lens revealed two peaks at wavelengths 425 and 460 nm. The photoreceptors were all rods and were arranged in two superimposed layers. An astaxanthin-type retinal tapetum was observed in the pigment epithelium. Some chemical evidence is presented showing that the tapetal material is an astaxanthin ester. The ecological significance of the yellow lens is discussed in connection with that of Malacosteus ’ orbital light organ which has a reddish filter.

Deep-sea fish assemblages (300-2100 m) in the eastern Pacific off northern Mexico

2018 ◽  
Vol 592 ◽  
pp. 225-242 ◽  
Author(s):  
E Cruz-Acevedo ◽  
N Tolimieri ◽  
H Aguirre-Villaseñor
Keyword(s):  
Deep Sea ◽  
Fish Assemblages ◽  
Eastern Pacific ◽  
Northern Mexico ◽  
Sea Fish

scholarly journals Contributions to Management Strategies in the NE Atlantic Regarding the Life History and Population Structure of a Key Deep-Sea Fish (Mora moro)

Biology ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 522
Author(s):  
Régis Santos ◽  
Wendell Medeiros-Leal ◽  
Osman Crespo ◽  
Ana Novoa-Pabon ◽  
Mário Pinho
Keyword(s):  
Population Structure ◽  
Life History ◽  
Deep Sea ◽  
Management Strategies ◽  
Size Composition ◽  
Large Size ◽  
The Common ◽  
Fishing Impacts ◽  
Sea Fish

With the commercial fishery expansion to deeper waters, some vulnerable deep-sea species have been increasingly captured. To reduce the fishing impacts on these species, exploitation and management must be based on detailed and precise information about their biology. The common mora Mora moro has become the main deep-sea species caught by longliners in the Northeast Atlantic at depths between 600 and 1200 m. In the Azores, landings have more than doubled from the early 2000s to recent years. Despite its growing importance, its life history and population structure are poorly understood, and the current stock status has not been assessed. To better determine its distribution, biology, and long-term changes in abundance and size composition, this study analyzed a fishery-dependent and survey time series from the Azores. M. moro was found on mud and rock bottoms at depths below 300 m. A larger–deeper trend was observed, and females were larger and more abundant than males. The reproductive season took place from August to February. Abundance indices and mean sizes in the catch were marked by changes in fishing fleet operational behavior. M. moro is considered vulnerable to overfishing because it exhibits a long life span, a large size, slow growth, and a low natural mortality.

Preliminary observations on abundance and distribution of fish fauna in a canyon of the Bay of Biscay (ICES Division 8c)

2021 ◽  
pp. 1-10
Author(s):  
G. Diez ◽  
L. Arregi ◽  
M. Basterretxea ◽  
E. Cuende ◽  
I. Oyarzabal
Keyword(s):  
Deep Sea ◽  
Basque Country ◽  
Fish Fauna ◽  
Fishing Effort ◽  
Fishing Gear ◽  
Clear Trend ◽  
Depth Ranges ◽  
Abundance And Distribution ◽  
Sea Fish ◽  
Distribution Of Fish

Abstract The changes in abundance and biodiversity of deep-sea fish fauna are described based on an annual deep-water longline survey with data collected during the period 2015–2019 in the Basque Country continental Slope (ICES Division 8c). The sampling scheme included hauls in four 400 m strata, from 650–2250 m deep. The DST sensors installed in the main line have allowed us to set an accurate soak time for each haul, and they were used to calculate fishing effort and CPUE by haul. The catchability of the fishing gear indicated that 15% of the total hooks deployed in the five-year period were able to fish, and that the bottom longline was very effective in fishing a wide number of different species in all depth ranges. The fishing gear caught 14 different species of sharks (13 deepwater and one pelagic), two chimaeras and nine teleosts. The abundance and biomass registered on the hooks attached to the bottom were between three and four times higher than in the floating sections, and the highest CPUE and biomass were recorded between 1051–1450 m, from 2015 to 2017, and in the 1451–1850 m strata, but they do not show any clear trend throughout the five years of the series.

The effects of submarine canyons and the oxygen minimum zone on deep-sea fish assemblages off Hawai'i

2012 ◽  
Vol 64 ◽  
pp. 54-70 ◽  
Author(s):  
Fabio C. De Leo ◽  
Jeffrey C. Drazen ◽  
Eric W. Vetter ◽  
Ashley A. Rowden ◽  
Craig R. Smith
Keyword(s):  
Deep Sea ◽  
Fish Assemblages ◽  
Oxygen Minimum Zone ◽  
Submarine Canyons ◽  
Minimum Zone ◽  
Sea Fish ◽  
Oxygen Minimum

New Scientific Information Can Help to Inform the Evaluation of EU Deep-sea Fisheries Regulations

2021 ◽  
pp. 1-20
Author(s):  
Phillip J Turner ◽  
Matthew Gianni ◽  
Ellen Kenchington ◽  
Sebastian Valanko ◽  
David E Johnson
Keyword(s):  
Deep Sea ◽  
Scientific Information ◽  
Fish Population ◽  
Molecular Techniques ◽  
Fish Stocks ◽  
Horizon 2020 ◽  
Management Measures ◽  
Sea Fish ◽  
The Eu ◽  
Fish Population Structure

Abstract The European Union’s deep-sea fisheries regulations (Regulation (EU) No. 2016/2336) established obligations to manage deep-sea fisheries and to protect vulnerable marine ecosystems (VMEs). The European Commission is scheduled to complete a review of the regulations in 2021, providing an opportunity for new scientific information to be incorporated into the implementation of the regulations. Here, we summarise research outputs from the EU-funded Horizon 2020 ATLAS Project and explain their relevance to the regulation of deep-sea fisheries in EU waters. ATLAS research has increased our understanding of the distribution of VMEs and their importance in terms of ecosystem functioning. ATLAS research has also highlighted the utility of molecular techniques to understand fish population structure and the potential for habitat suitability models to help incorporate climate change into decision-making. Building on these scientific advances, we provide recommendations to help increase the effectiveness of management measures to conserve deep-sea fish stocks and protect VMEs.

Microplastic Occurrence in Deep-Sea Fish Species Alepocephalus Bairdii and Coryphaenoides Rupestris from the Porcupine Bank (North Atlantic)

2021 ◽  
Author(s):  
Lucía Soliño ◽  
Leticia Vidal-Liñán ◽  
Patricia Pérez-Pérez ◽  
Salvador García-Barcelona ◽  
Francisco Baldó ◽  
...  
Keyword(s):  
Fish Species ◽  
North Atlantic ◽  
Deep Sea ◽  
Sea Fish
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