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Rajan, Rajkumar
- Bryozoans of Gulf of Mannar Marine Biosphere Reserve, Southeast Coast of India
Abstract Views :249 |
PDF Views:107
Authors
Affiliations
1 Marine Biology Regional Centre, Zoological Survey of India, 130, Santhome High Road, Chennai-600028, Tamil Nadu, IN
2 Department of Zoology, St. Theresa’s College, Ernakulam, Kerala-682035, IN
1 Marine Biology Regional Centre, Zoological Survey of India, 130, Santhome High Road, Chennai-600028, Tamil Nadu, IN
2 Department of Zoology, St. Theresa’s College, Ernakulam, Kerala-682035, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 116, No 2 (2016), Pagination: 167-189Abstract
Bryozoans are widely distributed taxa. They are colonial invertebrates, filter feeding and normally found adhered to a substratum as encrusting or erect forms. These are aquatic animals inhabiting both fresh and marine waters. Bryozoans are found commonly in high diversities and greater abundance in most of the shallow water regions worldwide (Gordon, 1986). These are also one of the commonest fowlers found be attached to ship hulls and other substrates which is submerged in water including floating buoys and nets etc. (Tilbrook, 2006).Full Text
- Protozoans and Other Fauna Associated with Sea Grass Ecosystems of Palk Bay
Abstract Views :237 |
PDF Views:128
Authors
Affiliations
1 Zoological Survey of India, Marine Biology Regional Centre, Chennai-600 028, IN
2 Zoological Survey of India, M-Block, Kolkata-700 053, IN
1 Zoological Survey of India, Marine Biology Regional Centre, Chennai-600 028, IN
2 Zoological Survey of India, M-Block, Kolkata-700 053, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 114, No 2 (2014), Pagination: 191-210Abstract
Palk Bay is situated in the southeast coast of India between latitude 9° 55’-10° 45’ N and longitude 78° 58’-79° 55’E. The Palk Bay itself is about 110 km long and is surrounded on the northern and western sides by the coastline of the state of Tamil Nadu in the mainland of India. Palk Bay is a shallow and fl at basin, the depth hardly exceeds 9 metres on an average.Full Text
- Status of Coral Reefs in Palk Bay
Abstract Views :234 |
PDF Views:118
Authors
Affiliations
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 113, No 2 (2013), Pagination: 1-11Abstract
Palk Bay is the sea between southeast of India and northwest of Sri Lanka, separated by Pamban Pass from Gulf of Mannar in the South and extends up to Kodiakarai coast in the North. The bay is characterized by a shallow basin with an average depth of 9 m. There is a well defined fringing reef which runs parallel to the shore, at the south west of the Palk Bay, extending 7.46 km from 09° 17' 14.8" N; 079° 11' 16.4" E at the East near Pamban to 09° 17' 34.4" N; 079° 06' 57.8" E towards the west of the bay, with the width varying from 200 m to 600 m at different places, and occurring at a maximum depth of 4 m.Full Text
- Notes on the Association of Lissocarcinus polybiodes Adams and White, 1848 (Portunidae, Caphyrinae), with Sea Star Luidia Maculata Muller and Troschel, 1842
Abstract Views :228 |
PDF Views:131
Authors
Rajkumar Rajan
1,
C. Venkatraman
1,
G. Sivaleela
1,
D. Paranthaman
1,
P. Padmanaban
1,
K. Venkataraman
1
Affiliations
1 Marine Biology Regional Centre, Zoological Survey of India, 130, Santhome High Road, Chennai - 600 028, IN
1 Marine Biology Regional Centre, Zoological Survey of India, 130, Santhome High Road, Chennai - 600 028, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 112, No 2 (2012), Pagination: 23-26Abstract
A portunid swimmer crab Lissocarcinus polybiodes Adams and White, 1848, which is usually free living or associated with hard corals (Stephenson, 1972), is shown to have commensal association with a sea star Luidia maculata MuUer and Troschel, 1842, is reported for the first time. Significantly, this is the second only report of this species from the Indian waters (Chennai Coast) after Alcock's (1899) description of specimens from Malabar, Orissa, Ganjam, Malabar and Andamans.Keywords
Association, Portunidae, Lissocarcinus, Sea Star, Luidia, India.Full Text
- Observations of Synchronized Spawning, Larval Survival and Settlement in Corals of the Genus Acropora in Lakshadweep, India
Abstract Views :175 |
PDF Views:84
Authors
Affiliations
1 Zoological Survey of India, Marine Regional Centre, Chennai 600 028, IN
1 Zoological Survey of India, Marine Regional Centre, Chennai 600 028, IN
Source
Current Science, Vol 121, No 1 (2021), Pagination: 133-140Abstract
Reports of synchronous spawning in corals of Lak-shadweep reefs, India have been purely anecdotal. To understand factors that underlie coral spawning in Lakshadweep, we studied four Acropora species (A. muricata, A. cytherea, A. hemprichii and A. nobilis) in Kavaratti atoll from February to March 2018. These species were observed in situ for oocyte maturation, and the larvae of species A. muricata and A. cytherea were assessed for survival and settlement rates. Observations on oocyte maturation indicated possible spawning closer to the immediate full moon of species in which 7–28 % of the colonies had mature oocytes. Thus, A. muricata, A. cytherea and A. hemprichii spawned on 25 and 26 February 2018, demonstrating multi-specific synchronous spawning, whereas A. nobilis spawned on 21 March 2018. Larval survival rates revealed a steep die-off beginning on day 12 post-spawning and maximum survival up to 24–27 days. Settlement occurred between 12 and 20 days for A. muricata and between 12 and 22 days for A. cytherea. The comparatively low survival duration and fewer larvae surviving for settlement show that maximum settlement could be heavily compromised. However, the study reveals that the comparatively late onset of settlement (from day-12, post-spawning) and the broader settlement window of 8–10 days could allow room for long-distance dispersal of larvae. Further studies on this front are required to gather a better picture.Keywords
Acropora Genus, Coral Reproduction, Larvae Survival, Oocyte Maturation, Synchronized Spawning.Full Text
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