Migratory patterns, vertical distributions and diets of Abralia veranyi and Abraliopsis morisii (Cephalopoda: Enoploteuthidae) in the eastern North Atlantic

2019 ◽  
Vol 86 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Airam Guerra-Marrero ◽  
Vicente Hernández-García ◽  
Airam Sarmiento-Lezcano ◽  
David Jiménez-Alvarado ◽  
Angelo Santana-del Pino ◽  
...  
Keyword(s):  
Canary Islands ◽  
North Atlantic ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Mantle Length ◽  
Migration Patterns ◽  
Ontogenetic Shifts ◽  
Vertical Distributions ◽  
Migratory Patterns ◽  
Eastern North Atlantic

Abstract Abralia veranyi and Abraliopsis morisii were the most abundant cephalopods caught during epipelagic and mesopelagic surveys off the Canary Islands and accounted for 26% and 35% of the cephalopod catch, respectively. Diel vertical migration patterns were observed in both species. At night, A. veranyi was recorded at depths as shallow as 38–90 m, whereas Abraliopsis morisii occurred at depths of 98–219 m. As individuals grow in mantle length, their diet changes substantially. Abraliopsis morisii showed ontogenetic shifts at 22.9 mm and 35.3 mm dorsal mantle length (DML), while A. veranyi showed ontogenetic shifts at 20.5 mm and 30.9 mm DML. Prior to the first ontogenic shift, both species fed mainly on copepods and mysids. After this shift they fed on larger prey, such as decapods and fish; the diets of larger individuals also contained cephalopods.

The Vertical Distribution of Pelagic Decapods [Crustacea: Natantia] Collected on the Sond Cruise 1965 I. The Caridea

1970 ◽  
Vol 50 (4) ◽  
pp. 939-960 ◽  
Author(s):  
P. Foxton
Keyword(s):  
Vertical Distribution ◽  
Canary Islands ◽  
North Atlantic ◽  
Depth Range ◽  
Main Interest ◽  
Acoustic Characteristics ◽  
Biological Collections ◽  
Eastern North Atlantic ◽  
The Vertical Distribution ◽  
Principal Elements

This study forms a contribution to a series (Angel, 1969; Clarke, 1969; Baker, 1970; Badcock, 1970) describing the biological results of a detailed investigation of the ecology of an oceanic area located in the eastern North Atlantic, close to the island of Fuerteventura (Canary Islands). The scientific background and objectives of the investigation, conducted during September to December 1965, have been described elsewhere (Currie, Boden & Kampa, 1969). Our main interest lay in the biological composition and acoustic characteristics of sonic scattering layers, and it was therefore considered essential to sample the principal elements of the pelagic fauna within the depth range 0–1000 m in as quantitative and detailed a manner as was technically possible. The resulting biological collections represent a unique body of material, the analysis of which is directly pertinent to the vertical distribution, diurnal migration and ecological interrelationships of the mesopelagic fauna.

scholarly journals Vertical distribution of Baltic sprat larvae: changes in patterns of diel migration?

2007 ◽  
Vol 64 (5) ◽  
pp. 956-962 ◽  
Author(s):  
Rüdiger Voss ◽  
Jörn O. Schmidt ◽  
Dietrich Schnack
Keyword(s):  
Vertical Distribution ◽  
Surface Waters ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Behavioural Change ◽  
Migration Patterns ◽  
Near Surface ◽  
Diel Migration ◽  
The Baltic ◽  
Comparison Of The Results

Abstract Voss, R., Schmidt, J. O., and Schnack, D. 2007. Vertical distribution of Baltic sprat larvae: changes in patterns of diel migration? – ICES Journal of Marine Science, 64: 956–962. Ontogenetic and diurnal vertical migration patterns of Baltic sprat larvae were investigated for the periods 1989–1990 and 1998–2002. Comparison of the results led to the hypothesis that the diel vertical migration behaviour of sprat larvae >10 mm has changed. In 1989 and 1990, sprat larvae migrated to the surface at night, whereas they stayed 30–50 m deep by day. From 1998 to 2002, sprat larvae showed no signs of diel vertical migration, remaining in warmer, near-surface water by day and night. This behavioural change coincided with a more general change in the Baltic ecosystem, i.e. an increase in near-surface temperature and a general increase in abundance of the major prey organism (Acartia spp.) of Baltic sprat larvae, with more pronounced aggregation in surface waters.

scholarly journals Diel vertical migration patterns of three zooplankton populations in a Chilean lake

2004 ◽  
Vol 77 (1) ◽  
Author(s):  
RODRIGO RAMOS-JILIBERTO ◽  
JOSÉ L. CARVAJAL ◽  
MAURICIO CARTER ◽  
LUIS R. ZÚÑIGA
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Migration Patterns

Changes in Light Intensity and Diel Vertical Migration: a Comparison of Marine and Freshwater Environments

1995 ◽  
Vol 75 (1) ◽  
pp. 15-25 ◽  
Author(s):  
J. Ringelberg
Keyword(s):  
Light Intensity ◽  
Marine Environment ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Response Mechanism ◽  
Causal Factors ◽  
Stimulus Response ◽  
Vertical Distributions ◽  
Using Data ◽  
Freshwater Environments

Proximate aspects of diel vertical migration in the freshwater and marine environment are compared using data from the literature. Examples of migrations in both environments are presented, from which it is concluded that relative changes in light intensity before sunrise and after sunset are primary causes of migrations. Experiments have shown that photoreactive behaviour is enhanced in the presence of predators but inhibited by shortage of food. These factors are called secondary causal factors. A hierarchy of causal factors is proposed. In lakes fish exudates suffice but in marine biotopes like bays, it is possible that fish have to be actually present for enhancement to take effect. To what extent the presented stimulus-response mechanism holds for mesopelagic animals in oceans is discussed on the basis of vertical distributions of euphausiids.

Unveiling a surprising diversity of the genus Diopatra Audouin & Milne Edwards, 1833 (Annelida: Onuphidae) in the Macaronesian region (eastern North Atlantic) with the description of four new species

Zootaxa ◽  
2017 ◽  
Vol 4300 (4) ◽  
pp. 505 ◽  
Author(s):  
HANNELORE PAXTON ◽  
ANDRES ARIAS
Keyword(s):  
New Species ◽  
Canary Islands ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Cape Verde ◽  
Scanning Electron Micrographs ◽  
Dichotomous Key ◽  
Eastern North Atlantic ◽  
Eastern North Atlantic Ocean ◽  
Scanning Electron

This study reviews previous records and reports on newly sampled species of the genus Diopatra from Macaronesia, a region comprising five volcanic archipelagos in the eastern North Atlantic Ocean. Of the three species previously known from the eastern North Atlantic and the Mediterranean, D. marocensis and D. micrura are newly reported from the Canary Islands, and the record of D. neapolitana from Madeira is confirmed. The earliest descriptions of Diopatra from Madeira are D. brevicirrus and D. madeirensis; the former is here considered as a nomen dubium, whilst the latter is redescribed, based on new collections from Madeira and the Canary Islands. Diopatra gallardoi, recently described from Namibia, is reported from the Canary Islands. Four new species are described: D. mariae sp. nov. and D. mellea sp. nov. with peristomial cirri (typical Diopatra), and D. budaevae sp. nov. and D. hektoeni sp. nov. (lacking peristomial cirri, previously considered as Epidiopatra); the former three species are from the Canary Islands and the fourth is from Cape Verde Islands. This brings the Diopatra fauna from the Macaronesian region to nine species. Diagnoses and full descriptions are presented for new and redescribed species and extended diagnoses for others, accompanied by detailed illustrations, including scanning electron micrographs and drawings. A dichotomous key to all recognized species is included plus a table summarizing specific diagnostic characters. 

scholarly journals Microplastic interactions with North Atlantic mesopelagic fish

2015 ◽  
Vol 73 (4) ◽  
pp. 1214-1225 ◽  
Author(s):  
Amy L. Lusher ◽  
Ciaran O'Donnell ◽  
Rick Officer ◽  
Ian O'Connor
Keyword(s):  
Marine Environment ◽  
North Atlantic ◽  
Vertical Migration ◽  
Deep Sea ◽  
Diel Vertical Migration ◽  
Euphotic Zone ◽  
Mesopelagic Fish ◽  
Marine Biota ◽  
Northeast Atlantic ◽  
Migration Behaviour

Abstract Microplastics in the marine environment are well documented, and interactions with marine biota have been described worldwide. However, interactions with vertically migrating fish are poorly understood. The diel vertical migration of mesopelagic fish represents one, if not the largest, vertical migration of biomass on the planet, and is thus an important link between the euphotic zone, transporting carbon and other nutrients to global deep sea communities. Knowledge of how mesopelagic fish interact and distribute plastic as a marine contaminant is required as these populations have been identified as a potential global industrial fishery for fishmeal production. Ingestion of microplastic by mesopelagic fish in the Northeast Atlantic was studied. Approximately 11% of the 761 fish examined had microplastics present in their digestive tracts. No clear difference in ingestion frequency was identified between species, location, migration behaviour, or time of capture. While ingesting microplastic may not negatively impact individual mesopelagic fish, the movement of mesopelagic fish from the euphotic zone to deeper waters could mediate transfer of microplastics to otherwise unexposed species and regions of the world's oceans.

Observations on the Vertical Distribution of the Genus Acanthephyra (Crustacea: Decapoda) in the eastern North Atlantic, with particular reference to Species of the ‘purpurea’ Group.

1972 ◽  
Vol 73 ◽  
pp. 301-313 ◽  
Author(s):  
P. Foxton
Keyword(s):  
Vertical Distribution ◽  
North Atlantic ◽  
South Atlantic ◽  
The North ◽  
Mesopelagic Zone ◽  
Vertical Distributions ◽  
The North Atlantic ◽  
Eastern North Atlantic ◽  
The Vertical Distribution ◽  
Mesopelagic Species

SynopsisThe vertical distribution of pelagic decapods has been investigated at six positions, each located approximately at 10° interval of latitude between 11°N and 60°N in the eastern North Atlantic. An account of the day and night depth distribution of four mesopelagic species, Acanthephyra purpurea, A. pelagica, A. sexspinosa and A. acanthitelsonis, and four bathypelagic species, A. prionota, A. curtirostris, A. acutifrons and A. stylorostratis, is presented. The four mesopelagic species have vertical distributions which vary latitudinally in association with geographical gradients in temperature, the mesopelagic zone from about the latitude of 28°N cooling both polewards and equatorwards. It is concluded that environmental temperature is a major factor in controlling the vertical ranges of these species although other physical variables, principally light, must also be involved.A faunal boundary exists in the region of 18°N, where the North Atlantic species A. purpurea and A.pelagica are replaced by the Central and South Atlantic species A. sexspinosa and A. acanthitelsonis. The nature of the physical boundary is not clear, but it is tentatively proposed that it represents a relatively broad area where the North Atlantic Central Water and South Atlantic Central Water meet.

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