Fatima,M.
Euphausiids from central part of north Arabian Sea collected in S.W. monsoon season Journal Article
In: Marine Research, Karachi, vol. 1, no. 92, pp. 79-85, 1992.
Abstract | BibTeX | Tags: Arabian Sea, Euphausiid, sex-ratio
@article{,
title = {Euphausiids from central part of north Arabian Sea collected in S.W. monsoon season},
author = {Fatima,M.},
year = {1992},
date = {1992-01-01},
journal = {Marine Research, Karachi},
volume = {1},
number = {92},
pages = {79-85},
abstract = {Four species of Euphausiacea (E. sibogae, E. dimedeae, P. latifrons, and S. carinatum) collected during the sw monsoon season from an open sea station (63 degree E, 20 degree N) in the central part of the north Arabian Sea are reported. Size structure, sex ratios and key to the identification of these species with figures is provided.},
keywords = {Arabian Sea, Euphausiid, sex-ratio},
pubstate = {published},
tppubtype = {article}
}
Four species of Euphausiacea (E. sibogae, E. dimedeae, P. latifrons, and S. carinatum) collected during the sw monsoon season from an open sea station (63 degree E, 20 degree N) in the central part of the north Arabian Sea are reported. Size structure, sex ratios and key to the identification of these species with figures is provided.
Matthew,K.J.,Naomi,T.S.,Antony,G.,Scariah,K.S.
Proceedings of the first workshop on scientific results of FORV Sagar Sampada, 5-7 June, 1989. Cochin. Conference
no. 150, Central Marine Fisheries Research Institute, 1990.
Abstract | BibTeX | Tags: abundance, Arabian Sea, density, Distribution, Euphausiid
@conference{,
title = {Proceedings of the first workshop on scientific results of FORV Sagar Sampada, 5-7 June, 1989. Cochin.},
author = {Matthew,K.J.,Naomi,T.S.,Antony,G.,Scariah,K.S.},
year = {1990},
date = {1990-01-01},
number = {150},
pages = {121-127},
publisher = {Central Marine Fisheries Research Institute},
abstract = {The Euphausiacea collected from 1,086 stations during the cruises 1-44 of FORV Sagar Sampada in the eastern Arabian Sea and the Bay of Bengal from 1985-'88 were studied for their spatial, seasonal and day and night abundance. The average density of euphausiids in the entire area investigated was estimated to be 3,214 per 1000 m super(3) ofwater. With regard to spatial distribution, more euphausiids were present in the eastern Arabian Sea (3,680/1000 m super(3)) than in the Bay of Bengal (2,517/1000 m super(3)). The observed percentage of increase for the eastern Arabian Sea over the Bay of Bengal worked out to 92.42. When an attempt was made to understand the seasonal variation, it was found that off the west coast, more number of euphausiids was present (the rate being 5,272/1000 m super(3)) during the south west monsoon season. Least abundance of2,505 was noticed during the premonsoon season. The day time abundance ofeuphausiids in the upper 150 m of water column was at a rate of2,282 while the same during the night was 4,651, thus indicating 103.81% of increase in the night samples.},
keywords = {abundance, Arabian Sea, density, Distribution, Euphausiid},
pubstate = {published},
tppubtype = {conference}
}
The Euphausiacea collected from 1,086 stations during the cruises 1-44 of FORV Sagar Sampada in the eastern Arabian Sea and the Bay of Bengal from 1985-'88 were studied for their spatial, seasonal and day and night abundance. The average density of euphausiids in the entire area investigated was estimated to be 3,214 per 1000 m super(3) ofwater. With regard to spatial distribution, more euphausiids were present in the eastern Arabian Sea (3,680/1000 m super(3)) than in the Bay of Bengal (2,517/1000 m super(3)). The observed percentage of increase for the eastern Arabian Sea over the Bay of Bengal worked out to 92.42. When an attempt was made to understand the seasonal variation, it was found that off the west coast, more number of euphausiids was present (the rate being 5,272/1000 m super(3)) during the south west monsoon season. Least abundance of2,505 was noticed during the premonsoon season. The day time abundance ofeuphausiids in the upper 150 m of water column was at a rate of2,282 while the same during the night was 4,651, thus indicating 103.81% of increase in the night samples.
Silas,E.G.,Matthew,K.J.
Spatial distribution of Euphausiacea (Crustacea) in the southeastern Arabian Sea Journal Article
In: Journal of the Marine Biological Association of India, vol. 28, no. 230, pp. 1-21, 1986.
Abstract | BibTeX | Tags: abundance, Arabian Sea, Distribution, Euphausiid, India, Oceanic, zooplankton
@article{,
title = {Spatial distribution of Euphausiacea (Crustacea) in the southeastern Arabian Sea},
author = {Silas,E.G.,Matthew,K.J.},
year = {1986},
date = {1986-01-01},
journal = {Journal of the Marine Biological Association of India},
volume = {28},
number = {230},
pages = {1-21},
abstract = {Spatial distribution of euphausiids of the southeastern Arabian Sea (west coast of India including the Lakshadweep Sea) was studied. The Arabian Sea and the Bay of Bengal, closed at their northern parts, present special hydrographical features which influence the distribution and abundance of zooplankton in these areas. Here the l0 degree N latitude is thought to be an effective barrier against he penetration of several oceanic species of euphausiids northwards. This is because of the significant changes in the water quality of N of 10 degree N being influenced by the discharge from major river systems of the Indian sub-continent. The species Thysanopoda monacantha, T. tricuspidata and Stylocheiron maximum, which were believed to be restricted to areas south of 10 degrees N are distributed even further northwards.},
keywords = {abundance, Arabian Sea, Distribution, Euphausiid, India, Oceanic, zooplankton},
pubstate = {published},
tppubtype = {article}
}
Spatial distribution of euphausiids of the southeastern Arabian Sea (west coast of India including the Lakshadweep Sea) was studied. The Arabian Sea and the Bay of Bengal, closed at their northern parts, present special hydrographical features which influence the distribution and abundance of zooplankton in these areas. Here the l0 degree N latitude is thought to be an effective barrier against he penetration of several oceanic species of euphausiids northwards. This is because of the significant changes in the water quality of N of 10 degree N being influenced by the discharge from major river systems of the Indian sub-continent. The species Thysanopoda monacantha, T. tricuspidata and Stylocheiron maximum, which were believed to be restricted to areas south of 10 degrees N are distributed even further northwards.
Ponomareva,L.A.
Euphausiids of the Indian Ocean and the Red Sea (original title Ehvfauziidy Indijskogo okeana I krasnogo morya) Journal Article
In: Nauka, vol. 1, no. 197, 1975.
Abstract | BibTeX | Tags: Arabian Sea, biology, Distribution, Euphausiid, feeding, Indian Ocean, migration, plankton, Red Sea, zooplankton
@article{,
title = {Euphausiids of the Indian Ocean and the Red Sea (original title Ehvfauziidy Indijskogo okeana I krasnogo morya)},
author = {Ponomareva,L.A.},
year = {1975},
date = {1975-01-01},
journal = {Nauka},
volume = {1},
number = {197},
abstract = {The study is mainly based on euphausiid material from 2390 plankton samples collected in the Indian Ocean during Oct-March 1959/60 and 1960/61. Data are presented on the sp composition, biology, vertical and quantitative distribution. The northern Indian Ocean (as far south as 40 degree S) is inhabited by typically tropical euphausiid fauna. The area most rich in euphausiids is the Arabian Sea. The spp most commonly occurring in the 0-200m layer in the Indian Ocean are Euphausia diomedeae, E. distinguenda, Stylocheiron carinatum and Thysanopoda tricuspidata. In the northern Indian Ocean eggs an early larval stages occurred from Jan to June (no observations were made later in the yr), which suggests that euphausiids spawn several times during the yr. The eggs develop very rapidly (within <24h) and so do early larval stages. On reaching the nauplius-2 stage the development slows down and it takes the larva 10-12 days to develop into furcilia-1. The feeding is varied and mixed: none of the spp were observed to feed on phyto- or zooplankton exclusively. Migratory spp show diurnal feeding rhythms. Most of the spp occurring in the upper layers ( down to 500m) are distinct migrants; interzonal spp do not perform significant migrations rarely rising close to the surface and almost never occurring above 50-40m. The Red Sea is inhabited by immigrants from teh Gulf of Aden and by some endemic spp. The spp abundant in the Arabian Sea are also predominant here with the addition of S. affine. },
keywords = {Arabian Sea, biology, Distribution, Euphausiid, feeding, Indian Ocean, migration, plankton, Red Sea, zooplankton},
pubstate = {published},
tppubtype = {article}
}
The study is mainly based on euphausiid material from 2390 plankton samples collected in the Indian Ocean during Oct-March 1959/60 and 1960/61. Data are presented on the sp composition, biology, vertical and quantitative distribution. The northern Indian Ocean (as far south as 40 degree S) is inhabited by typically tropical euphausiid fauna. The area most rich in euphausiids is the Arabian Sea. The spp most commonly occurring in the 0-200m layer in the Indian Ocean are Euphausia diomedeae, E. distinguenda, Stylocheiron carinatum and Thysanopoda tricuspidata. In the northern Indian Ocean eggs an early larval stages occurred from Jan to June (no observations were made later in the yr), which suggests that euphausiids spawn several times during the yr. The eggs develop very rapidly (within <24h) and so do early larval stages. On reaching the nauplius-2 stage the development slows down and it takes the larva 10-12 days to develop into furcilia-1. The feeding is varied and mixed: none of the spp were observed to feed on phyto- or zooplankton exclusively. Migratory spp show diurnal feeding rhythms. Most of the spp occurring in the upper layers ( down to 500m) are distinct migrants; interzonal spp do not perform significant migrations rarely rising close to the surface and almost never occurring above 50-40m. The Red Sea is inhabited by immigrants from teh Gulf of Aden and by some endemic spp. The spp abundant in the Arabian Sea are also predominant here with the addition of S. affine.
Weigmann,R.
On the ecology and feeding habits of the euphausiids (Crustacea) in the Arabian Sea (Zur Okologie und Eranhrungsbiologie der Euphausiaceen (Crustacea) im Arabischen Meer) Journal Article
In: Meteor Forschungsergeb., vol. 5, no. 498, pp. 11-52, 1970.
Abstract | BibTeX | Tags: Arabian Sea, biology, density, diet, Distribution, ecology, Euphausiid, feeding, Gulf of Aden, Gulf of Oman, marine, Oman, population, populations, predation, Red Sea, Upwelling, zooplankton
@article{,
title = {On the ecology and feeding habits of the euphausiids (Crustacea) in the Arabian Sea (Zur Okologie und Eranhrungsbiologie der Euphausiaceen (Crustacea) im Arabischen Meer)},
author = {Weigmann,R.},
year = {1970},
date = {1970-01-01},
journal = {Meteor Forschungsergeb.},
volume = {5},
number = {498},
pages = {11-52},
abstract = {In the present paper, the ecology and feeding habits of euphausiids are described. The samples were taken at the time of the NE-monsoon (1964/65) by R. V. 'Meteor' in the Arabian Sea and adjacent waters. 24 spp were determined. According to distribution of the spp, the following marine areas can be distinguished: Arabian Sea: 24 spp, dominant are Euphausia diomedeae, E. tenera, E. distinguenda, Stylocheiron carinatum. Gulf of Aden: 1 0 spp, dominant are Euphausia diomedeae, E. distinguenda. Red Sea: 6 spp, dominant are Euphausia diomedeae, E. distinguena. Gulf of Oman: 5 spp, dominant are Euphausia distinguenda, Pseudeuphausia latifrons. Persian Gulf: 1 sp- Pseudeuphausia latifrons. The total number of euphausiids indicate the biomass of this group. High densities of euphausiids (200-299 and > 300 individuals/l00 m super(3)) occur in the innermost part of the Gulf of Aden, in the area south of the Euqator near the African east coast, near Karachi (Indian west coast) and in the Persian Gulf. Comparison with data relating to production biology confirms that these are eutrophic zones which coincide with areas in which upwelling occurs at the time of the NE-monsoon. The central part of the Arabian Sea differs from adjacent waters by virtue of less dense euphasiid populations (>199 individuals/lOO m super(3)). Measurements relating to production biology demonstrate a relatively low concentration of primary food sources. Food material was ascertained by analysis of stomach content. The following omnivorous species were examined: Euphausia diomedeae, E. distinguenda, E. tenera, Pseudeuphausia latifronts and Thysanopoda tricuspidata. Apart from crustacean remains large numbers of Foraminifera, Radiolaria, tintinnids, dinoflagellates were found in the stomachs. Quantitatively crustaceans form the most important item in the diet. Food selection on the basis of size an form appears to be restricted to certain genera of tintinnids. The genera Stylocheiron and Nematoscelis are predators. Only crustacean remains were found in the stomachs of Stylocheiron abbreviatum, whereas Radiolaria, Foraminifera and tintinnids occurred to some extent in Nematoscelis sp. Different euphauisiids occupy different positions in the food chain in the Arabian Sea. In omnivorous species the position is variable, since they not only feed by filtering autotrophic and heterotrophic Protista, but also by predation on zooplankton. Carnivorous spp without filtering apparatus feed exclusively on zooolankton of the size of copepods. Only these spp are well established as occupying a higher position in food chain. The parasrtlc protozoan Thalassomyces fagei was found on Euphausia diomedeae, E. tenera, E. distinguenda and E. sanzoi.},
keywords = {Arabian Sea, biology, density, diet, Distribution, ecology, Euphausiid, feeding, Gulf of Aden, Gulf of Oman, marine, Oman, population, populations, predation, Red Sea, Upwelling, zooplankton},
pubstate = {published},
tppubtype = {article}
}
In the present paper, the ecology and feeding habits of euphausiids are described. The samples were taken at the time of the NE-monsoon (1964/65) by R. V. 'Meteor' in the Arabian Sea and adjacent waters. 24 spp were determined. According to distribution of the spp, the following marine areas can be distinguished: Arabian Sea: 24 spp, dominant are Euphausia diomedeae, E. tenera, E. distinguenda, Stylocheiron carinatum. Gulf of Aden: 1 0 spp, dominant are Euphausia diomedeae, E. distinguenda. Red Sea: 6 spp, dominant are Euphausia diomedeae, E. distinguena. Gulf of Oman: 5 spp, dominant are Euphausia distinguenda, Pseudeuphausia latifrons. Persian Gulf: 1 sp- Pseudeuphausia latifrons. The total number of euphausiids indicate the biomass of this group. High densities of euphausiids (200-299 and > 300 individuals/l00 m super(3)) occur in the innermost part of the Gulf of Aden, in the area south of the Euqator near the African east coast, near Karachi (Indian west coast) and in the Persian Gulf. Comparison with data relating to production biology confirms that these are eutrophic zones which coincide with areas in which upwelling occurs at the time of the NE-monsoon. The central part of the Arabian Sea differs from adjacent waters by virtue of less dense euphasiid populations (>199 individuals/lOO m super(3)). Measurements relating to production biology demonstrate a relatively low concentration of primary food sources. Food material was ascertained by analysis of stomach content. The following omnivorous species were examined: Euphausia diomedeae, E. distinguenda, E. tenera, Pseudeuphausia latifronts and Thysanopoda tricuspidata. Apart from crustacean remains large numbers of Foraminifera, Radiolaria, tintinnids, dinoflagellates were found in the stomachs. Quantitatively crustaceans form the most important item in the diet. Food selection on the basis of size an form appears to be restricted to certain genera of tintinnids. The genera Stylocheiron and Nematoscelis are predators. Only crustacean remains were found in the stomachs of Stylocheiron abbreviatum, whereas Radiolaria, Foraminifera and tintinnids occurred to some extent in Nematoscelis sp. Different euphauisiids occupy different positions in the food chain in the Arabian Sea. In omnivorous species the position is variable, since they not only feed by filtering autotrophic and heterotrophic Protista, but also by predation on zooplankton. Carnivorous spp without filtering apparatus feed exclusively on zooolankton of the size of copepods. Only these spp are well established as occupying a higher position in food chain. The parasrtlc protozoan Thalassomyces fagei was found on Euphausia diomedeae, E. tenera, E. distinguenda and E. sanzoi.