Abstract of FSI publication* (2000)
- Publication No: 5
Abstract of FSI publication (May 2000)
Bibliography of FSI publications* (1998)
- Publication No: 4
Bibliography of FSI publications (October 1998)
Bibliography On Tuna Fisheries In The Indian Seas* (1992)
- Publication No: 3
- Author: M.E.JOHN AND A.K. BHARGAVA
Tunas and tuna-like resources are the potential resources available for exploitation in the Indian seas. In this publication scientific papers and other documents on tuna published in India are compiled for the benefit of researchers. The references included are on fishery, biology, population dynamics, exploratory surveys, commercial fishing, distribution and development prospects of tuna fisheries.
Studies On Fish Stock Assessment In Indian Waters* (1989)
- Publication No: 2
Paper 1. Population Dynamics And Assessment Of Trichiurus Lepturus Linnaeus Stock In North-west Coast Of India
V.S.SOMVANSHI AND ANTONY JOSEPH
Ribbon fish forms an important component of fish landings along the north-west coast. Results of studies on population parameters and stock assessment of Trichiurus lepturus Linnaeus based on material collected in the survey conducted by the vessel M.T. Murena in the year 1977 are presented. The analysis gave growth parameters Loo as 109 cm and K as 0.64. The instantaneous natural mortality co-efficient, M and total mortality co-efficient Z, estimated for the species were 0.8 and 2.16 respectively. Analysis of variance carried out to know the geographical,bathymetyrical and seasonal influence on the CPUE of the species indicates that the abundance is not influenced by seasons and it should be studied by three spatial divisions, viz., (i) Lat. 15-18N, (ii) Lat. 19-27 20N and (iii) Lat. 21-23N and also to be segregated for the depth ranges 50-100m and 100-200m. The biomass and MSY of ribbon fish assessed for north-west coast are 156 thousand tonnes and 70 thousand tonnes respectively.
Paper 2. Some Consideration On The Population Dynamics Of Yellowfin Tuna Thunnus Albacares (Bonnaterre) In Indian Seas
M.E.JOHN AND K.S.N. REDDY
Results of a study on population dynamics of yellowfin tuna, Thunnus albacares in Indian seas based on data collected in longline survey is presented in the paper. The survey covered oceanic waters of the Indian EEZ and adjacent areas, during 1983-88. Length-weight relationship of yellowfin tuna is described as W = 0.000049557 L 2.8055. The von Bertalanffy parameters obtained are Loo = 175 cm and K = 0.29. Natural mortality coefficient is estimated as 0.74. In view of data limitations the results are considered only as prefatory.
Paper 3. Estimates Of Stock Density, Biomass And Maximum Sustainable Yield Of Priacanthus Hamrur (Forskal) Off The North West Coast Of India
R.S.BIRADAR
Bottom trawl surveys were carried out off the northwest coast of India between 15N to 22N latitudes covering 3 depth strata viz; less than 50 m, 50-100 m and 100-200 m, during 1984-1987. The stock density of Priacanthus hamrur varied in the different depth zones and quarters. The depth zone 50-100 m was more productive as compared to less than 50 m depth. The stock density was highest during October to December and lowest during July to September. The total biomass of P. hamrur was estimated to be 88,560 tonnes, with maximum sustainable yield of 25,000 tonnes per annum. During monsoon (July - September), the stock density as well as the chance of encountering the species were low, indicating possible movement or migration of the stock. The distribution of stock in relation to hydrographic parameters over time and space may throw further light on the hypothesis of movement or migration.
Paper 4. Population Dynamics And Stock Assessment Of The Cuttle Fish, Sepia Pharaonis (Ehrenberg) In Wadge Bank
K.P.PHILIP AND D.M. ALI
An attempt is made in this paper to estimate population parameters and stock size of S. pharaonis in the Wadge Bank based on trawl survey conducted by FSI. Using von Bertalanfy plot Loo and K are calculated as 37.0 cm and 0.5 year-1. Total mortality Z is estimated as 1.1. Total Biomass of 2060 tonnes of S. pharonis is estimated from this area.
Paper 5. Biometric Comparison Of Samples Of The Carangid Fish Carangoides Malabaricus (Bloch & Schneider) From Two Localities Of The East Coast Of India
A.SHAMEEM
Samples of Malabar Trevally, Carangoides malabaricus from Kakinada and Waltair on the east coast of India are compared using chi- square test for meristic characters and multivariate analysis for morpho metric characters. Six meristic characters and six body measurements were analysed.
Paper 6. Trends In Drift Gillnet Fishery Off Kochi With Special Reference To Eff Inputs And Returns During 1981-82 And 1986-87. In : Studies On Fish Stock Assessment In Indian Waters
A.A.JAYA PRAKASH
The paper presents an account of the drift gill net fishery at Cochin from 1981 to 1987. The annual catch/effort showed upward trend from 93 kg in 1982 to 176 kg in 1987. The major group of fishes that contributed to the fishery during 1981-87 were tunas and bill fishes (37.8%), seer fishes (19.1%), elasmobranchs (4.4%), cat fishes (13.4%), carangids (5.5%), pomfrets (5.3%) and mackerel (1.6%).
Paper 7. A Study Of The Stock Of Priacanthus Hamrur (Forsskal) During March And September Between Lat.11-16n Along The West Coast Of India
K.VIJAYAKUMARAN AND S.K. NAIK
Analysis of abundance with respect to the latitude and different depth ranges during the lean fishing season using STATGRAPICS is attempted in this paper. No significant different between the average catch rate observed for March and September which indicates it is a single stock fishery. Total estimated biomass for the month of March and September are 24014.59 tonnes and 27598.52.
Paper 8. Inferior Condition Of Mullets From Polluted Waters Of Visakhapatnam Harbour
B.RAM BHASKAR, K. SRINIVASA RAO, D. PANDURANGA RAO AND Y.V.K. DURGA PRASAD
The condition factor (q) of comparable length groups of mullets (Mugil cephalu and Liza macrolepis) from Visakhapatnam inner harbour (polluted site) and from Gostani estuary, Bhimilipatnam (control site) were estimated. The condition factor was found to be much lower in the case of mullets from harbour waters than that of mullets from Gostani estuary. Analysis of variance (ANOVA) of the ln W (ln mean weight) with the corresponding ln L (ln mid-point of length group) as covariate showed significant difference between mullets of the two waters. Low condition factor of the fishes from the harbour waters which is due to high concentrations of heavy metals, oil and grease in the waters, affecting the well-being of the fishes.
Paper 9. Gillnet Selectivity Of Hilsa Ilisha (Ham.buch.) In The Hoogly - Matlah Estuarine System
S.K.MANDAL
The study present a hypothetical example of two selection curves imposed on the data to demonstrate the effect of selection.
Paper 10. Application Of Swept Volume Method In Pelagic Stock Assessment Of Megalaspis Cordyla (Linnaeus) Along North-west Coast Of India
ANTONY JOSEPH AND V.S. SOMVANSHI
The paper presents results of detailed analysis of data on horse mackerel, Megalaspis cordyla, collected during six cruises of the vessel M.T. Murena along the north-west coast in 1977. The results indicate certain behavioural characteristics of this pelagic species : (i) occurrence in large schools in surface layer upto 200m depth, (ii) schooling in high densities during night and (iii) congregation of schools vulnerable to pelagic trawls during 0000-0400 hours. The species was found to be abundant during January - March. A new concept of assessment of biomass by `swept volume' is suggested for assessing the pelagic stocks. Pelagic trawl surveys with acoustics would be the inputs in this method. The limitations of this method due to variations in catchability coefficient, associated with shoaling habit and migration of small pelagics are discussed.
Trawl Gear Operated By EFP* (1979)
- Publication No: 1
- Author: M.SWAMINATH, MOHAMED ROSHAN AKTHAR, M.K.R. NAIR, M.E. JOHN, ANTONY JOSEPH AND S. VARGHESE
This publication deals with the designs of trawl nets operated by different classes of vessels of Exploratory Fisheries Project since its inception in 1946. Description of various part of net with important details on construction are given. Data and construction drawing of different sizes of two seam fish trawls and four seam shrimp trawls, along with details of vessels and otter boards with which the nets were operated are specified. During the period otterboards of different shapes were used by the project vessels, especially conventional flat type and recently introduced oval type. The drawings with specific measurements along with rigging patterns are presented. Cost particulars of different size of trawl nets and a glossary of technical terms are also given.
