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Seasonal and spatial distribution of larval euphausiids from the shelf waters off southwest coast of India

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Relation http://eprints.cmfri.org.in/1056/
 
Title Seasonal and spatial distribution of larval euphausiids from the shelf waters off southwest coast of India
 
Creator Mathew, K J
 
Subject Phytoplanktons
 
Description The annual mean value of euphausiid larval biomass in the southwest shelf waters of India has
been numerically estimated to be 1,507 per 1000 m' of water. There was a well defined oscillation
in the abundance of larvae mostly in relation to the changes in the environment brought about by
upwelling. The June to October period was associated with intense upwelling in the study area. The
process of upwelling started in the southern parts and gradually moved to the northern areas, according
to which there was a seasonal and spatial shift in the larval abundance too. A monthly estimate revealed
that while the larvae were least abundant in June 36/1000 m') they were moderate in December,
February and April (151-679/1000 m') and maximum in August and October (3,856 and 4,393/1000 m*).
The larvae of Pseudeuphausia latifrons, Euphausia diomedeae, Nematoscelis gracilis and Stylocheiron
armatum were more during the non-upwelling period of December to April. The larvae of Euphausia
sibogae were abundantly present during the August-October period (of intense upwelling). The
larvae of Stylocheiron affine were present almost throughout the year. The abundance of larvae of
various species in different months was indicative of the breeding seasons.
 
Publisher MBAI
 
Date 1989
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1056/1/Mathew_138-149.pdf
Mathew, K J (1989) Seasonal and spatial distribution of larval euphausiids from the shelf waters off southwest coast of India. Journal of the Marine Biological Association of India, 31 (1&2). pp. 138-149.