In the gulf of kutch on the northwestern shelf of india the semidiurnal constituents m 2 and s 2 get amplified approximately threefold. Diversity and distribution of gastropods of intertidal region of northern gulf of kachchh, gujarat, india. Fossil otoliths, from the gulf of kutch, western india, as a. Qeshm, located in strait of hormuz which is the largest island in the persian gulf by having 20 km length and up to 30 km width.
Karkara, khaga, dhoma, magra and musi exist in the gulf. The gulf of kutch stretches east to west by more than 100 km and is very shallow, with a typical depth range of 1020 m and a maximum of 40 m. A brief on the contribution of the central marine fisheries. Jan 19, 2018 the earliest gastropods are thought to have evolved in marine habitats during the late cambrian. Gastropods are invertebrate animals that make up the largest class in the phylum mollusca. In most of the persian gulf water salinity is more than 39 psu sheppard et al. Pdf two new records of minute marine gastropods from marine. Gulf of kutch, cochin, madras, mahabalipuram, gulf of mannar and palk bay. The vermetidae of the gulf of kachchh, western coast of. During the present study polychaetes were dominant with 10 species followed by gastropods 8 species, crustaceans and bivalves 4 species and nematodes one species. The cerithioids are a diverse group of gastropods found globally as fossil and living animals during the cenozoic era. English s, wilkinson c, baker v 1997 survey manual for tropical marine resources. Most gastropods have an external shell snails while some groups are shellless slugs. They include wellknown groups like periwinkles, whelks, cowries and seabutterflies.
It is argued here that unhindered faunal mixing was not possible in this province since these newly evolved basins were restricted in nature in their lower cenozoic history. The gulf of kutch is referred to in the periplus of the erythraean sea, a travelogue written in about 50 ce, as the gulf of baraca. The crosssectional area of the gulf decreases from mouth to head and this could be playing a role in amplification of the tide. A total of 108 species of mollusca were recorded from the southern coast of the gulf of kachchh gok.
The intertidal zone of gulf of kutch coasts is not very wide, generally dynamic wave action due to this reason. In contrast, amplification of the diurnal constituents k 1 and o 1 is small. At the end of the last whorl is the aperture, or opening. Later, in 1982, a core area of 110 km 2 was declared marine national park under the provisions of the wildlife. The opensea domain during jurassic times was over the area of the present arabian gulf dercourt et al. Two new records of minute marine gastropods from marine national. From analytical and numerical solutions of linear, viscous, crosssectionally averaged equations for tidal motion in a channel, it is seen that the observed amplification results. Most gastropods have an external shell snails while some groups are. Fossil otoliths, from the gulf of kutch, western india, as. The shaqra group is named after the town of shaqra manivit et al.
Gastropods include shelled snails as well as slugs without shells. Other shell artifacts can be identified as having been made from species that have more. So far the coral reef ecosystem around this island has not been. The group overlies the late permian to late triassic buraydah group le nindre et al. Gulf of kutch the nearshore areas of the gulf, with a catalogued list of 37 species 24 genera of coral fauna, is heavily silted with terregenous deposits brought in by the tides and the winds. Gastropods are one of the most diverse groups of animals, both in form, habit, and habitat.
The gulf of kutch is opening towards the northeastern arabian. It is a dangerous sign for indian marine biodiversity. The gulf of kutch is referred to in the periplus of the erythraean sea, a. Proceedings of the symposium on mollusca held at cochin from january bouchet p, rocroi jp. The saurashtra coast between the gulf of kutch and gulf of cambay presents unique oceanographic features and is endowed with a wide variety of highly relished table fishes. Pdf marine biodiversity of gulf of kutch located in. The persian gulf is a shallow semienclosed basin connected to the gulf of oman through the strait of hormuz. New subfamily indovolutinae and other volutids volutidae.
Examples of common gastropods include all varieties of snails, abalone, limpets, and land and sea slugs. Diversity and distribution of marine gastropods mollusca. The southern shore of the gulf has abundant islands and inlets covered with mangroves and surrounded by coral reefs. Such species include one of the sessile gastropods, the vermetids. Distribution of molluscs in the eastern persian gulf, pggoos. All along the coast, very few rivers drain into the gulf of kutch and they carry only a small quantity of freshwater, except during brief monsoon. The financial, infrastructural aspects, deliverables to the society are presented primarily focusing on the local economic and. The study of gulf of kutch shows that the area is rich in coral reef and benthos. In view of the presentday situation, the need of the hour is to maximize production from the vast resources of the state in a judicious and wellmanaged fashion so as to. Later, in 1982, a core area of 110 km 2 was declared marine national park under the provisions of the wildlife protection act, 1972 of india. Gastropods are a highly diverse group of mollusks that include between 60,000 and 80,000 living species. Journal of the bombay natural history society 107, 14 23. Numerical abundance of bivalves and nematodes was less with 7. Classification and 12 to 16, 1968, symposium series 3, pt.
Conidae, neritidae, olividae, arcidae, spondulidae, cardiidae, etc. Pdf two minute marine gastropod species, pseudoliotia henjamensis melvill. During the present study polychaetes were dominant with 10 species followed by gastropods 8 species, crustaceans and bivalves 4. First record of rare marine gastropod margovula tinctilis c. The iranian shore of the persian gulf has steeply sloping sections and arabian shore is mostly sedimentary siebold, 1973. The earliest terrestrial gastropods were the maturipupa, a group that dates back to the carboniferous period. Preliminary checklist of marine mollusks from beyt dwarka, gulf of kutch ecosensitive zone, gujarat, india. In the gulf of kutch there are about 42 pearl oyster reefs, known as khaddas. The paper is aimed to describe the geological significance of the sites with basic concept of creation of geoparks and promote geotourism. Gulf of kachchh, kachchh also spelled kutch, cutch, or kachh, northeastern arm of the arabian sea, extending between the rann of kachchh a salt waste and the kathiawar peninsula of westcentral india. The eastern gulf opens into the high saline marshy area, the little rann of kutch, which was inundated from 6 ka to 2 ka ramaswamy et al. The marine national park mnp is located in the southern shore of the gulf of kachchh 2228n. There are over 35,000 existing species, as well an additional 15,000 separate fossil species. Estimates of total extant species range from 40,000 to over 100,000, but there may be as many as 150,000 species.
Their systematics is riddled with problems stemming from large morphological variability, homoplasy, and wide geographical distribution. Six cerithioid species are described here from the lower middle eocene of kutch, gujarat, western india. Marine biodiversity of gulf of kutch located in northeastern arabian sea. Here, we have analyzed for these factors to assess the impact on marine biodiversity especially benthos and planktonic organisms. Shell catalogue shell index by species e gastropods. In 1980, an area of 270 km 2 from okha to jodiya was declared marine sanctuary. Members of this group include terrestrial snails and slugs, sea butterflies, tusk shells, conchs, whelks, limpets, periwinkles, oyster borers, cowries, nudibranchs, and many others. International journal of biological, ecological and. Generally, the coils, or whorls, added later in life are larger than those added when the snail is young. Coastal area of alang having the mix type of intertidal habitat rocky, muddy and sandy fig. The snails that most of us are familiar with typically have a large muscular foot supporting a visceral mass the rest of. List of species collected in the grab samples is given table112 15. This diversity is mainly due to preponderance of marine molluscs. Lithostratigraphic and biostratigraphic setting the shaqra group is named after the town of shaqra manivit et al.
Pdf the present study was conducted at three sites having different coastal characteristics in northern gulf of kachchh namely mandvi. Malacologia 47, biological association of india, mandapam camp, 97. The vermetidae of the gulf of kachchh, western coast of india. They are by far the largest group of molluscs, with more than 62,000 described living species, and they comprise about 80% of living molluscs.
The gulf of kutch has a variety of exploitable species of finfishes and shellfishes. Introduction cerithioids are an extremely diverse and less understood group of gastropods. The intertidal area of the gulf of kutch, borders the coastline of jamnagar district and covers a total area of about 24,000 ha, from sachana in the east to ajad in the west fig. Distribution of molluscs in the eastern persian gulf, pg. Pal zoological survey of india, mblock, new alipore, kolkata700 053 introduction the ammonoidea have been extinct long back but their shells in fossilized forms are seen in. Molluscs adapted a widely variable range of habitats. Marine national park in the gulf of kutch is situated on the southern shore of the gulf of kutch in the devbhumi dwarka district of gujarat state, india. The gulf of kutch is an inlet of the arabian sea along the west coast of india, in the state of gujarat, which is renowned for extreme daily tides. The shell is secreted along the outer lip of the aperture by the fleshy part of the. Width and depth of the gulf of kutch as function of distance km. Reaching eastward for some 110 miles 180 km, the gulf varies in width from 10 to 40 miles 16 to 65 km.
Marine biodiversity of gulf of kutch located in northeastern. Seven species belonging to the gastropod family volutidae are reported for the first time from kutch, gujarat, india. Margovula tinctilis, first record, gulf of kachchh, west coast. The study which is included here can be used to measure the impact of marine environment. The vermetidae of the gulf of kachchh, western coast of india mollusca, gastropoda. The northern shore is mostly sandy or muddy provoked by several fish flocks. Surya rao and sastry 2008 listed 5 species from gujarat. Pal zoological survey of india, mblock, new alipore, kolkata700 053. Study was carried out in alangsosiya ship braking yard 212326. Development of geotourism in kutch region, gujarat, india.
Gulf of mannar have 428 species, lakshadweep 424 spp. Macroparasites in intertidal gastropods on qeshm island. Dredging of sand f or the cement industry and the mining of massive corals also caused severe damages to the reefs. Family trochidae trochus niloticus linnaeus the shell is conical or pagodalike, white with many reddishbrown longitudinal bands fig. Marine biodiversity of gulf of kutch located in north. Sorry, we are unable to provide the full text but you may find it at the following locations. Gastropoda is a very diverse class of molluscs seashells that occurs in terrestrial, marine and freshwater environments. Terebella, polynoe, iphione and nereis are rather common. Study of abundance and distribution of sub tidal macrobenthic. The typical snail has a calcareous shell coiled in a spiral pattern around a central axis called the columella. The gulf of kachchh is situated on the western coast of india and located between 2215n and 2340n latitude and 6820e and 7040e longitude. There are about 30,000 known species of gastropods. Prestrombus rockei cox, 1931, indovoluta humberti darchiac and haime, 1854, indovoluta multidentata darchiac and haime, 1854, involuta daviesi cox, 1931, involuta coxi new species, athleta volutocorbis harnaiensis cox, 1931, and lyria cf.
Pdf preliminary checklist of marine mollusks from beyt. Twentysix species of fishes recorded from this island reef area were found to be new records from the indian coast. Gastropods account for nearly 80 percent of all living mollusks. Molluscan studies in gulf of mannar coast sathyamurthy 1952, 1956 collected and documented about the molluscs of krusadai island in gulf of mannar especially from reef habitat and intertidal areas. The upper boundary of the shaqra group, corresponding to a preearly cretaceous erosion surface, is overlain by. Species assemblage in the coral reef ecosystem of netrani.
The selected shoreline of okha and vadinar experiences wave actions to a heavy extent. The shell attains a size of 8 cm to 12 cm and the period of longevity is about ten. Snails and slugs gastropoda on the shores of singapore. In most gastropods the muscular foot is the locomotion organ. Materials and methods study area and sampling this study was undertaken on qeshm island in the northern persian gulf, iran. The sciaenids, polynemids, perches, eels, catfishes, elasmobranchs and prawns are commercially important groups with an average catch of 1.
Pdf marine biodiversity of gulf of kutch located in north. The vermetidae of the gulf of kachchh, western coast of india ncbi. Some eocene cerithioids gastropoda, mollusca from kutch. The gulf of kachchh is the only site in gujarat bestowed with one of the four major coral reef formations of the country singh et al. Gastropods definition of gastropods by medical dictionary.
It is rimmed with mudflats, and many small islands rise from its waters. Diversity and first record of heterobranch gastropods. Gastropods are asymmetrical molluscs that underwent torsion. A manual on methods for measuring primary production in aquatic. The shells of gastropods and bivalves provide additional functions, e.
Geotourism in kutch has an exemplary potential of being designated as a site for perfect establishment of a national geopark. Research article some eocene cerithioids gastropoda. Coral reefs, vermetidae, paga reef, gulf of kachchh. Pdf on aug 1, 2018, ashok k rathoure and others published marine biodiversity of gulf of kutch located in northeastern arabian sea find, read and cite all the research you need on researchgate. The maximum and minimum temperatures offshore at the closest grid point from the mouth of the gulf 23. Keywordsabundance, gulf of kutch,india, macro benthos subtidal. It is largely barren except for a fertile band along the gulf of kachchh in the arabian sea. Image nasa earth observatory the gulf o kutch is an inlet o the arabian sea alang the wast coast o indie, in the state o gujarat, an renained for extreme daily tides.
623 1073 478 750 284 405 1306 569 609 1288 1299 901 851 379 876 726 1534 33 1237 198 29 103 389 344 1285 186 984 393 2