scholarly journals Aggregation ofEuphausia sibogaeduring Summer Monsoon along the Southwest Coast of India

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
K. J. Jayalakshmi ◽  
P. Jasmine ◽  
K. R. Muraleedharan ◽  
M. P. Prabhakaran ◽  
H. Habeebrehman ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Early Phase ◽  
Developmental Stages ◽  
Environmental Parameters ◽  
Spawning Aggregation ◽  
Phytoplankton Blooms ◽  
Southwest Coast Of India ◽  
Southwest Coast ◽  
Conducive Environment ◽  
Peak Phase

The influence of environmental parameters on the spawning aggregation ofEuphausia sibogaewas investigated along the southwest coast of India during the peak phase of summer monsoon 2005. The prevailing ecological conditions between the aggregation period (peak phase) and non-aggregation period (early phase) were also compared. The aggregation was observed at station 1 (8∘N;76.5∘E, 480 ind⋅m-3) and 6 (10∘N;75.5∘E, 839 ind.m-3) during the peak phase of the summer monsoon. Eggs (14769 eggs m-3) and different developmental stages were observed in higher abundance at station 6. The physicochemical conditions indicated that the aggregation coincided with the upwelling. The nutrient enrichment due to the upwelling triggered phytoplankton blooms, and this appeared to provide a conducive environment for spawning and development ofE. sibogae.

Characterization and distribution of microplastics in estuarine surface sediments, Kayamkulam estuary, southwest coast of India

2021 ◽  
Vol 168 ◽  
pp. 112389
Author(s):  
K. Radhakrishnan ◽  
V. Sivapriya ◽  
A. Rajkumar ◽  
N. Akramkhan ◽  
P. Prakasheswar ◽  
...  
Keyword(s):  
Surface Sediments ◽  
Southwest Coast Of India ◽  
Southwest Coast

scholarly journals Implications of an extensive salt water barrage on the distribution of black clam in a tropical estuarine system, Southwest coast of India

Oceanologia ◽  
2021 ◽  
Author(s):  
Arunpandi Nagarathinam ◽  
Jyothibabu Retnamma ◽  
Jagadeesan Loganathan ◽  
Parthasarathi Singaram ◽  
Savitha Mohanan ◽  
...  
Keyword(s):  
Salt Water ◽  
Estuarine System ◽  
Southwest Coast Of India ◽  
Southwest Coast ◽  
Tropical Estuarine

Occurrence of a multi-species diatom bloom dominated by Proboscia alata (Brightwell) Sandstorm along the southwest coast of India

2013 ◽  
Vol 42 (1) ◽  
Author(s):  
Lathika Cicily ◽  
K. Padmakumar ◽  
C. Asha Devi ◽  
V. Sanjeevan
Keyword(s):  
Cell Density ◽  
Coastal Waters ◽  
Monsoon Season ◽  
Late Summer ◽  
Nutrient Concentrations ◽  
Diatom Bloom ◽  
Southwest Coast Of India ◽  
Southwest Coast ◽  
Toxic Species ◽  
A Cell

AbstractThe present communication reports on the occurrence of a multi-species diatom bloom in the upwelled waters along the southwest coast of India. During the late summer monsoon season (September 2009) a multi-species diatom bloom with a pale green discoloration of the sea surface was observed in the coastal waters of southwest coast of India. The bloom spread over an area of approximately 15 km2 along the coastal waters off Kannur (Lat. 11°59.471 N, Long. 75°03.446 E). Total diatom cell density of the bloom area was 16 × 104 cells l−1. Proboscia (=Rhizosolenia) alata (Brightwell) Sandstrom constituted 90% of the total phytoplankton population. Other phytoplankton groups that contributed to the bloom population included Chaetoceros spp., Pseudo-nitzschia spp., Rhizosolenia spp., Coscinodiscus sp., Leptocylindrus danicus, Thalassiosira sp., and Bacteriosira sp. Among these Pseudo-nitzschia multiseries, a toxic species with the ability to produce potent neurotoxin domoic acid, was observed with a cell density of 4 × 103 cells l−1. Surface chlorophyll a concentration of the bloom region was 14.1 μg l−1. Nutrient concentrations of the bloom area were 0.01 μmol l−1 for NO2-N, 0.1 μmol l−1 for NO3-N, 0.83 μmol l−1 for PO4-P and 11.44 μmol l−1 for SiO4.

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