scholarly journals Biometry, length-weight and length-length relationships of flathead sillago Sillaginopsis panijus (Hamilton, 1822) (Perciformes: Sillaginidae) from the north-western Bay of Bengal

2020 ◽  
Vol 67 (3) ◽  
Author(s):  
Suraj Kumar Pradhan ◽  
Subal Kumar Roul ◽  
Shubhadeep Ghosh ◽  
Pritam Tripathy ◽  
A. K. Jaiswar ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Fork Length ◽  
Mesh Size ◽  
Population Based ◽  
Total Length ◽  
The North ◽  
Baseline Information ◽  
Eye Diameter ◽  
Western Bay Of Bengal ◽  
North Western

Biometry, length-weight relationships (LWRs) and length-length relationships (LLRs) of Sillaginopsis panijus (Hamilton, 1822) were investigated in the Indian coast of north-western Bay of Bengal. Altogether 622 specimens were collected between August 2018 and September 2019 from landings by trawls (30-35 mm mesh size), gillnets (15-55 mm mesh size) and shore seines (7-15 mm bag mesh size). The total length and weight of the specimens ranged from 7.8-40.3 cm and 2.9-506 g, respectively. The LWR established was W=0.0048 L3.059 for males, W=0.0032 L3.185 for females and W=0.0047 L3.0645 for indeterminates, indicating positive allometric growth pattern. All the LWRs were highly significant (p<0.001, r2≥0.977). The highest coefficient of correlation (r) was observed for total length against fork length (0.999) and lowest for head length against eye diameter (0.951). The fin formula was expressed as D1 X, D2 I + 24-28, P 17-22, V I + 5, A II + 25-27, GR 2-3/6-9. The study provides the first detailed account of the biometric relationships of S. panijus in the north-western Bay of Bengal, which can be used as baseline information for subsequent biological and population based studies in the region.

Hydrography and biogeochemistry of the north western Bay of Bengal and the north eastern Arabian Sea during winter monsoon

2008 ◽  
Vol 73 (1-2) ◽  
pp. 76-86 ◽  
Author(s):  
K.K. Balachandran ◽  
C.M. Laluraj ◽  
R. Jyothibabu ◽  
N.V. Madhu ◽  
K.R. Muraleedharan ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Arabian Sea ◽  
Winter Monsoon ◽  
The North ◽  
North Eastern ◽  
Eastern Arabian Sea ◽  
Western Bay Of Bengal ◽  
North Western

A baseline investigation of phytoplankton pigment composition in contrasting coastal ecosystems of north-western Bay of Bengal

2020 ◽  
Vol 160 ◽  
pp. 111708
Author(s):  
Suchismita Srichandan ◽  
Sanjiba Kumar Baliarsingh ◽  
Aneesh Anandrao Lotliker ◽  
Satya Prakash ◽  
Alakes Samanta ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Coastal Ecosystems ◽  
Pigment Composition ◽  
Phytoplankton Pigment ◽  
Western Bay Of Bengal ◽  
North Western

scholarly journals XII. Some anomalies in the winds of Northern India, and their relation to the distribution of barometric pressure

1887 ◽  
Vol 178 ◽  
pp. 335-378 ◽  
Keyword(s):  
Sea Level ◽  
Bay Of Bengal ◽  
Barometric Pressure ◽  
Diurnal Variations ◽  
Annual Reports ◽  
General Review ◽  
Northern India ◽  
The North ◽  
North Western ◽  
Made In

In the 13 years which have elapsed since Mr. Blanford published his paper on the Winds of Northern India, very great additions have been made to our knowledge of the meteorology of the country. The carefully organised system of observations, commenced in Bengal and the North-Western Provinces, has been extended to include the whole of India, and placed under the direction of Mr. Blanford himself, aided by local officers in all the larger provinces. Verified instruments have been supplied to all the stations, and the elevations of these above sea-level have been determined by connecting them with the lines of spirit-levelling, carried inland from the coast, in various directions, by the officers of the Great Trigonometrical Survey; or, where this was impracticable, by spirit-levelling to some of the trigonometrical stations of the Survey. In this way, trust worthy and intercomparable series of barometric observations, extending over ten years or more, have been obtained for all the more important stations. At the same time, the diurnal variations of the barometer at certain selected stations have been determined by long-continued series of hourly observations, with the object of enabling us to reduce the readings made in the ordinary way (usually at 10 a. m. and 4 p. m.) to time daily means. Simultaneously with the collection of this immense quantity of accurate and reliable barometric data, observations have been made of temperature, humidity, cloud, wind, and rain. Latterly also barometric and wind charts of the Bay of Bengal have been prepared from observations made on board ships navigating those waters. During these 13 years, the winds prevailing over the Indian continent and the Bay of Bengal, and their relations to the distribution of pressure at sea-level, have been discussed from time to time, both in their normal aspects for each month or season and in their abnormal or disturbed conditions during the passage of storms. The latter conditions in particular have been very fully described by Mr. Eliot in his numerous reports on cyclones in the Bay of Bengal, while the former have been noticed in the annual reports on the meteorology of India, in occasional papers appearing in the ‘Indian Meteorological Memoirs,' and latterly in a broad and general review in Mr. Blanford’s great monograph on the Rainfall of India.

Winter thermal inversion and Trichodesmium dominance in north-western Bay of Bengal

2017 ◽  
Vol 52 (2) ◽  
pp. 301-306 ◽  
Author(s):  
Biraja Kumar Sahu ◽  
Sanjiba Kumar Baliarsingh ◽  
Aneesh A. Lotliker ◽  
Chandanlal Parida ◽  
Suchismita Srichandan ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Thermal Inversion ◽  
Western Bay Of Bengal ◽  
North Western

scholarly journals ASPEK BIOLOGI UDANG BERAS MERAH (Metapenaeopsis barbata) di PERAIRAN UTARA KABUPATEN BATANG DAN PEMALANG, JAWA TENGAH (Biological Aspect of Whiskered Velvet Shrimp (Metapenaeopsis barbata) in North of Batang and Pemalang Disctrict Seas)

2018 ◽  
Vol 6 (4) ◽  
pp. 546-554
Author(s):  
Adnan Lintang Hanggoro ◽  
Anhar Solichin ◽  
Suradi Wijaya Saputra
Keyword(s):  
Random Sampling ◽  
Mesh Size ◽  
Fishing Ground ◽  
North Coast ◽  
Fishing Gear ◽  
Red Rice ◽  
Systematic Random Sampling ◽  
Total Length ◽  
The North ◽  
Central Java

Kegiatan penangkapan ikan di Pantai utara Provinsi Jawa Tengah yang terus meningkat dan penggunaan alat tangkap yang tidak selektif oleh nelayan akan mempengaruhi jumlah stok udang di perairan. Tujuan penelitian ini adalah untuk mengkaji dan membandingkan aspek-aspek biologi Udang Beras Merah (Metapenaeopsis barbata) yang meliputi aspek pertumbuhan dan reproduksi menurut perbedaan waktu pengambilan sampel (temporal) dan perbedaan perairan daerah penangkapan (spasial). Penelitian dilaksanakan pada bulan Februari – April 2017 di Kabupaten Batang dan Pemalang. Metode yang digunakan dalam pengambilan sampel menggunakan systematic random sampling. Hasil sampling yang dilakukan di Kabupaten Batang dan Pemalang menunjukkan panjang total udang M. barbata yang tertangkap berkisar pada ukuran 40 – 106 mm dan 52 – 118 mm. Pola pertumbuhan M. barbata yang tertangkap di Kabupaten Batang bersifat allometrik negatif, sedangkan udang yang didaratkan di Kabupaten Pemalang bersifat allometrik positif. Nilai faktor kondisi pada udang M. barbata yang didaratkan di Kabupaten Batang dan Pemalang selama penelitian adalah 1,908 dan 1, 584. Ukuran udang M. barbata yang pertama kali tertangkap di Kabupaten Batang dan Pemalang adalah 63 mm dan 88 mm. Rasio perbandingan nisbah kelamin Udang M. barbata jantan dan betina yang tertangkap selama penelitian sebesar 1 : 2,11. Udang M. barbata yang didaratkan di Kabupaten Pemalang pertama kali mengalami matang gonad pada ukuran panjang total 94,2 mm. Upaya untuk mempertahankan tersedianya stok spesies M. Barbata adalah dengan mengatur intensitas eksploitasi sumberdayanya dan ukuran mata jaring alat tangkap arad agar diperbesar menjadi ukuran 1,75 inchi. Pendataan jumlah produksi dan trip alat tangkap udang M. barbata penting untuk dilakukan, dengan tujuan pemerintah daerah tetap bisa memantau intensitas eksploitasi yang dilakukan nelayan. Fishing activities on the North Coast of Central Java Province are increasing and the using of fishing gear which is not selective by fishermen will affect the amount of shrimp stock in the waters. The purpose of this research was to examine and compare the biological aspects of Whiskered Velvet Shrimp (M. barbata) which are growth and reproduction aspects according to differences in timing of sampling (temporal) and different fishing ground (spatial). The research was conducted on February to April 2017 in Batang and Pemalang districts. The method used systematic random sampling. The results of the sampling carried out in Batang and Pemalang shows the total length caught M. barbata range in size of 40-106 mm and 52-118 mm. The growth pattern M. barbata caught in Batang is allometric negative, while the shrimp landed in Pemalang are positive allometric. The value of the condition factor on M. barbata landed in Batang and Pemalang District during the study was 1.1688 and 1.0618. The average size of M. barbata  first caught in Batang and Pemalang District is 63 mm and 88 mm. The ratio of sex ratio of male and female M. barbata caught during the study was 1: 2,11. Red Rice Prawns are landed in Pemalang District first experience mature gonads at a total length of 94.2 mm. The effort to maintain the availability of stock of the species M. barbata is to adjust the intensity of exploitation of resources and setting the mesh size of fishing gear in order arad (small bottom trawl) enlarged to a size of 1.75 inches. Documenting the amount of production and the number of trips M. barbata fishing tools necessary to do, with the aim is the local government can still monitor the intensity of exploitation of fishermen.

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