scholarly journals Ecological Significance of the Association betweenStomopneustes variolaris(Echinoidea) andLumbrineris latreilli(Polychaeta) from Visakhapatnam Coast, India

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Archana Ayyagari ◽  
Ramesh Babu Kondamudi
Keyword(s):  
Sea Urchin ◽  
Bay Of Bengal ◽  
East Coast ◽  
Sea Urchins ◽  
Natural Habitat ◽  
Ecological Significance ◽  
Test Diameter ◽  
East Coast Of India ◽  
New Association ◽  
Visakhapatnam Coast

The present study reports a new association between the sea urchinStomopneustes variolaris(Lamarck, 1816) and the polychaeteLumbrineris latreilli(Audouin & Milne Edwards, 1834) based on the specimens collected intertidally at Bay of Bengal (Visakhapatnam, east coast of India). Out of 60 sea urchins collected, 10 (16.67%) were associated with the polychaete. The prevalence increased with the increasing sea urchin test diameter. All polychaetes were exclusively found between the spines, in the aboral region of the host. This association protects the polychaete from the predators during displacement from its natural habitat.

scholarly journals A New Allogromiid Genus (Rhizopoda: Foraminiferida) from the Vellar Estuary, Bay of Bengal

1992 ◽  
Vol 11 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Andrew J. Gooday ◽  
Olivia J. Fernando
Keyword(s):  
Bay Of Bengal ◽  
Brackish Water ◽  
New Genus ◽  
East Coast ◽  
First Record ◽  
Water Interface ◽  
East Coast Of India ◽  
Indian Waters ◽  
Vellar Estuary

Abstract. This paper reports what we believe to be the first record of allogromiid foraminifers from coastal Indian waters. Two species from the Vellar Estuary on the east coast of India south of Madras are described and placed in a new genus Vellaria. The foraminifers live at or near the sediment-water interface and are characterised by the development of a flared, conical or trumpet-shaped apertural structure which apparently serves to attach the test to small sand grains. Allogromiids are delicate and inconspicuous organisms which may be more widespread in esturine and brackish water settings than is currently realised.

scholarly journals Density of the blue-black urchin Echinotrix diadema (Linnaeus, 1758) in Tomini Bay, Indonesia

2020 ◽  
Vol 1 (1) ◽  
pp. 16-21
Author(s):  
La Nane ◽  
Alfi Sahri R Baruadi ◽  
Herinda Mardin
Keyword(s):  
Natural Resources ◽  
Sea Urchin ◽  
Sea Urchins ◽  
Seawater Temperature ◽  
Test Diameter ◽  
Urchin Density ◽  
Blue Marlin ◽  
Transect Line ◽  
Significant Difference ◽  
Average Size

The blue-black urchin has been widely known and utilized as food in the world, including Indonesia because sea urchin gonad can be consumed. However, the utilization of sea urchins in Gorontalo has not been performed. On the other hand, natural resources information is needed as the database for natural resources management in Tomini Bay. The aim of this study is to document the blue-black urchin Echinotrix diadema. This study conducted at Blue Marlin Beach, South Leato, Gorontalo, from November 2019 to December 2020. Sea urchin density was calculated with a 1 m × 1 m transect quadrate that positioned at interval 5 m in distance along 15 m of the transect line at the coral reef ecosystem. In parallel with the measurement of the density, sea urchin test diameter was measured with a Vernier caliper (0.01 mm accuracy), and the water temperature was measured with a thermometer. The results show that the average of sea urchin density is 3 ind. m–2 in November and December and 1 ind.m–2 in January. That density has no significant difference among the month. Moreover, the average size of the sea urchin test diameter is 60 mm in November, 63 mm in December, and 66 mm in January. The seawater temperature is 34 °C in November, 37 °C in December, and 33 °C in January. That results show that sea urchin density in the blue marlin beach is very low.

scholarly journals Ehinoid landings at Mandapam, south-east coast of India with a note on gonadal maturity of two species of sea urchins

2017 ◽  
Vol 64 ◽  
Author(s):  
R. Saravanan ◽  
P. Jawahar ◽  
T. Francis ◽  
B. Ahilan ◽  
R. Santhakumar ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
East Coast ◽  
Sea Urchins ◽  
Marine Ecosystem ◽  
Gonad Index ◽  
Future Research ◽  
Gulf Of Mannar ◽  
East Coast Of India ◽  
Gonadal Maturity ◽  
Suitable Environment

The sea urchins, belonging to phylum Echinodermata, are a good source of “roe”, (gonads) and are being consumed by humans since pre-historic times. In many countries of the world, it is a delicacy among the food items and in retail markets in Japan, it is sold at prices as high as US$ 600 kg-1. Among the 800 species of echinoids, 105 species are found along the east coast of India and 30 species are recorded along the coast of Tamil Nadu. There is a paucity of information on the biology and ecology of sea urchins and lack of studies on its edibility and palatability. The sea urchin aquaculture called as echiniculture is picking up in subtropics and temperate areas. Importantly, the tropical marine ecosystem of India, which supports diverse flora and fauna is a suitable environment for echiniculture, and the future research needs to be focused to find out the potential species and developing techniques for their aquaculture. The present investigation analysed the landings of echinoderms in the Gulf of Mannar and Palk Bay along the south-east coast of India and also studied the gonadal maturity of two species of sea urchins viz., Salmacis virgulata and Temnopleurus toreumaticus in order to assess their suitability for echiniculture. S. virgulata and T. toreumaticus formed 70 and 30% respectively of the sea urchins landings at Vedalai and Pampan landing centres. The overall sex ratio of both the species did not deviate significantly from 1:1. In S. virgulata the mean monthly gonad index was highest (9.62±0.46) during September 2014 and for T. toreumaticus, the peak GSI was observed during December 2013. Further studies on captive maturation and breeding are needed to explore the potential of these species for echiniculture.

scholarly journals Seasonal variability of phytoplankton blooms in the coastal waters along the East coast of India

2014 ◽  
Vol XL-8 ◽  
pp. 1065-1071 ◽  
Author(s):  
T. Preethi Latha ◽  
K. H. Rao ◽  
E. Amminedu ◽  
P. V. Nagamani ◽  
S. B. Choudhury ◽  
...  
Keyword(s):  
Fresh Water ◽  
Bay Of Bengal ◽  
Coastal Waters ◽  
Algal Blooms ◽  
East Coast ◽  
Water Discharge ◽  
Marine Ecosystem ◽  
Chlorophyll Concentration ◽  
Phytoplankton Blooms ◽  
East Coast Of India

Bay of Bengal (BOB) is a semi enclosed tropical basin located in the north eastern part of the Indian Ocean with high influence of fresh water discharge from major rivers and rainfall. Bay of Bengal (BOB) is highly influenced by monsoons and represents a natural laboratory to study the effect of fresh water fluxes on the marine ecosystem. Bay of Bengal (BOB) is very low in productivity often with the observations of Phytoplankton Blooms. Phytoplankton blooms are one of the prominent features of biological variability in the coastal ecosystems such as estuaries, lagoons, bays, and tidal rivers with rapid production and accumulation of phytoplankton biomass in the ocean. These blooms usually respond to changing physical forcings originating in the coastal ocean like tides, currents and river runoff and to the atmospheric forcing like wind. These physical forcings have different timescales of variability, so algal blooms can be short-term episodic events, recurrent seasonal phenomena, or rare events associated with exceptional climatic or hydrologic conditions. Bloom events and their variability on spatial & temporal scales monitoring through field measurements is difficult. Based on this key hypothesis an effort is made to understand the seasonal and spatial variability of Phytoplankton Blooms along the East Coast of India. In this paper we present the bloom dynamics in their context to the chlorophyll concentration along with species composition and abundance in estuarine and near shore coastal waters of Godavari basin using Oceansat-2 Ocean Colour Monitor (OCM). The initial results revealed that the quasi permanent phytoplankton blooms initiates in the month of mid- February and evolves for a period of two months and then slowly starts decaying by the mid of May month. The results also stand as a base for the study of influence of Phytoplankton Blooms on the carbon flux estimations and bio-geo-chemical processes in the Bay of Bengal.

Evolution of extreme high waters along the east coast of India and at the head of the Bay of Bengal

2016 ◽  
Vol 140 ◽  
pp. 59-67 ◽  
Author(s):  
Charls Antony ◽  
A.S. Unnikrishnan ◽  
Philip L. Woodworth
Keyword(s):  
Bay Of Bengal ◽  
East Coast ◽  
East Coast Of India
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