Introduction Chilika lagoon is a recognized Ramsar site of International importance and the large... more Introduction Chilika lagoon is a recognized Ramsar site of International importance and the largest brackish water lagoon of Asian continent located along the Odisha coast, well known for its high bio-diversity. A total of 317 species belonging to 207 genera in 88 families and 23 orders constitutes the updated finfish diversity of the lagoon till the year 2014. Fishes, commonly called Barracuda (Perciformes: Sphyraenidae) and also known as sea-pikes, are pelagic in habitat, distributed mainly in the IndoPacific region. The family Sphyraenidae comprises of single genus (Sphyraena) with 27valid species globally. From Indian waters, 9 species already have been confirmed. From Chilika lagoon, only two species of Sphyraenidae have been recorded so far, those are Sphyraena jello Cuvier, 1829 and Sphyraena putname Jordan & Seale, 1905. So, the present report of Sphyraena obtusata Cuvier, 1829 is a new record of Sphyraenidae fish species from the coastal lagoon, and an addition to the ichth...
Introduction Family Synanceiidae (Order: Scorpaeniformes) consisting of 36 species belonging to 9... more Introduction Family Synanceiidae (Order: Scorpaeniformes) consisting of 36 species belonging to 9 genera were reported globally. Out of which, 3 species from 3 genera i.e. Trachicephalus uranoscopus (Bloch and Schneider, 1801), Choridactylus multibarbus (Richardson, 1848) and Minous monodactylus (Bloch and Schneider, 1801) were reported from Indian waters. The distribution of star-gazing stonefish, T. uranoscopus is restricted to India, China, Thailand, Malaysia, Indonesia, Hong Kong, Singapore, and Vietnam. It is a tropical species and inhabits in brackish to marine environment within a depth of 2-25 m. In India, the species was reported from the peninsular region along Madras coast, Pondicherry and Karaikal coast, and Andaman Islands. Chilika lagoon, a designated Ramsar site of international importance and the largest brackish water lagoon of Asia, lies between latitudes 19° 28’ and 19° 54’ North and longitude 85° 05’ and 85° 38’ East. In the eastern part, the main lagoon is conne...
The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyce... more The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyceae in Chilika lagoon, north east coast of India. Thirty-eight species of dinoflagellates belonging to eight families were recorded, of which twelve are new reports to the lagoon. Of the twenty-six species recorded earlier, Neoceratium furca, Neoceratium fusus, Dinophysis caudata and Noctiluca scintillans were common among most of the earlier studies. Current study recorded presence of Dinophysis miles, which has not been encountered ever since it was first reported from the lagoon six decades ago. An updated checklist of dinoflagellates indicated presence of 68 species in the lagoon. The outer channel of the lagoon differed from southern and central sectors in distribution of dinoflagellates under the influence of salinity regime.
The growth, mortality and stock status of grey mullets Chelon parsia (Ham. 1822), Chelon planicep... more The growth, mortality and stock status of grey mullets Chelon parsia (Ham. 1822), Chelon planiceps (Val. 1836) and Mugil cephalus (Linn. 1758) were investigated during December 2010 to November 2011 from Chilika Lake, Asia, largest brackish water lake. The length-based analysis, using length frequency data collected from fish landing centres, formed the basic study methodology. Growth function and population parameters were studied using FAO-ICLARM Stock Assessment Tools-II (FiSAT-II). The von Bertalanffy growth function (VBGF) was established as Lt = 321 mm*(1 − exp (-0.98 year−1 × (t + 0.085 year)) for C. parsia, Lt = 315 mm × (1 − exp (−0.80 year−1 × (t + 0.105 year)) for C. planiceps and Lt = 700 mm*(1 − exp (−0.70 year−1*(t + 0.097 year)) for M. cephalus. Lower K and higher L∞ values for M. cephalus indicated slow growth and high longevity of the species, compared to other grey mullets. Length–weight relationships were derived, indicating isometric growth for grey mullets. Recruitment of mullets was observed throughout the year, with a peak during April–July. About 50% of the mullets were caught by fishing gear before reaching their first year of age. The level of exploitation (E ≥ 0.60) was more than the optimum level (E = 0.4 for pelagic stock), indicating overexploitation of grey mullets in Chilika Lake. Moreover, the average annual yields of three mullets were observed to be higher than the estimated maximum sustainable yields (MSY), also indicating overharvesting of mullets. Thus, the mullets could be considered one of the highly overexploited resources in Chilika Lake. The findings of this study will facilitate the development of appropriate management strategies for the mullet fishery in Chilika Lake.
... 2 REFERENCES [1] Ferhat, Kalayci., Necati Samsun., Sabri Bilgin., and Osman Samsun (2007). ..... more ... 2 REFERENCES [1] Ferhat, Kalayci., Necati Samsun., Sabri Bilgin., and Osman Samsun (2007). ... assessment International Journal of Natural and Engineering Sciences Pan-American Journal of Aquatic Sciences Gokhan Gokce, Ilker Aydın and Cengiz Metin (2007). ...
The growth features of a commercially important fish species, i.e. Etroplus suratensis (local nam... more The growth features of a commercially important fish species, i.e. Etroplus suratensis (local name "Kundala") was studied in the Chilika Lagoon. In total, 4192 of E. suratensis samples were measured with their total length during the period of June 2008 to May 2009. Different cohorts were identified through multiple length frequency analysis on the total length of these species and their growth curves were estimated. The estimated growth parameters like, L inf (cm), K, and t0 was 33.7cm, 0.20, and 0.01 for the species respectively. Length at 50% maturity (L 50) of the fish samples was also examined. The estimated L 50 for E. suratensis was 165mm (TL). Length-weight relationship (LWR) of Etroplus suratensis also estimated and the equation found y = 1E-05x 3.134 (n=118) for male, y = 3E-05x 2.998 (n=184) for female and y=2E-05X 3.101 (n=302) as unsexed samples. Here the computed growth coefficient (b) was 3.134, 2.998 and 3.101, where the regression coefficient (r 2) was 0.9...
The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyce... more The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyceae in Chilika lagoon, north east coast of India. Thirty-eight species of dinoflagellates belonging to eight families were recorded, of which twelve are new reports to the lagoon. Of the twenty-six species recorded earlier, Neoceratium furca, Neoceratium fusus, Dinophysis caudata and Noctiluca scintillans were common among most of the earlier studies. Current study recorded presence of Dinophysis miles, which has not been encountered ever since it was first reported from the lagoon six decades ago. An updated checklist of dinoflagellates indicated presence of 68 species in the lagoon. The outer channel of the lagoon differed from southern and central sectors in distribution of dinoflagellates under the influence of salinity regime.
Introduction Chilika lagoon is a recognized Ramsar site of International importance and the large... more Introduction Chilika lagoon is a recognized Ramsar site of International importance and the largest brackish water lagoon of Asian continent located along the Odisha coast, well known for its high bio-diversity. A total of 317 species belonging to 207 genera in 88 families and 23 orders constitutes the updated finfish diversity of the lagoon till the year 2014. Fishes, commonly called Barracuda (Perciformes: Sphyraenidae) and also known as sea-pikes, are pelagic in habitat, distributed mainly in the IndoPacific region. The family Sphyraenidae comprises of single genus (Sphyraena) with 27valid species globally. From Indian waters, 9 species already have been confirmed. From Chilika lagoon, only two species of Sphyraenidae have been recorded so far, those are Sphyraena jello Cuvier, 1829 and Sphyraena putname Jordan & Seale, 1905. So, the present report of Sphyraena obtusata Cuvier, 1829 is a new record of Sphyraenidae fish species from the coastal lagoon, and an addition to the ichth...
Introduction Family Synanceiidae (Order: Scorpaeniformes) consisting of 36 species belonging to 9... more Introduction Family Synanceiidae (Order: Scorpaeniformes) consisting of 36 species belonging to 9 genera were reported globally. Out of which, 3 species from 3 genera i.e. Trachicephalus uranoscopus (Bloch and Schneider, 1801), Choridactylus multibarbus (Richardson, 1848) and Minous monodactylus (Bloch and Schneider, 1801) were reported from Indian waters. The distribution of star-gazing stonefish, T. uranoscopus is restricted to India, China, Thailand, Malaysia, Indonesia, Hong Kong, Singapore, and Vietnam. It is a tropical species and inhabits in brackish to marine environment within a depth of 2-25 m. In India, the species was reported from the peninsular region along Madras coast, Pondicherry and Karaikal coast, and Andaman Islands. Chilika lagoon, a designated Ramsar site of international importance and the largest brackish water lagoon of Asia, lies between latitudes 19° 28’ and 19° 54’ North and longitude 85° 05’ and 85° 38’ East. In the eastern part, the main lagoon is conne...
The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyce... more The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyceae in Chilika lagoon, north east coast of India. Thirty-eight species of dinoflagellates belonging to eight families were recorded, of which twelve are new reports to the lagoon. Of the twenty-six species recorded earlier, Neoceratium furca, Neoceratium fusus, Dinophysis caudata and Noctiluca scintillans were common among most of the earlier studies. Current study recorded presence of Dinophysis miles, which has not been encountered ever since it was first reported from the lagoon six decades ago. An updated checklist of dinoflagellates indicated presence of 68 species in the lagoon. The outer channel of the lagoon differed from southern and central sectors in distribution of dinoflagellates under the influence of salinity regime.
The growth, mortality and stock status of grey mullets Chelon parsia (Ham. 1822), Chelon planicep... more The growth, mortality and stock status of grey mullets Chelon parsia (Ham. 1822), Chelon planiceps (Val. 1836) and Mugil cephalus (Linn. 1758) were investigated during December 2010 to November 2011 from Chilika Lake, Asia, largest brackish water lake. The length-based analysis, using length frequency data collected from fish landing centres, formed the basic study methodology. Growth function and population parameters were studied using FAO-ICLARM Stock Assessment Tools-II (FiSAT-II). The von Bertalanffy growth function (VBGF) was established as Lt = 321 mm*(1 − exp (-0.98 year−1 × (t + 0.085 year)) for C. parsia, Lt = 315 mm × (1 − exp (−0.80 year−1 × (t + 0.105 year)) for C. planiceps and Lt = 700 mm*(1 − exp (−0.70 year−1*(t + 0.097 year)) for M. cephalus. Lower K and higher L∞ values for M. cephalus indicated slow growth and high longevity of the species, compared to other grey mullets. Length–weight relationships were derived, indicating isometric growth for grey mullets. Recruitment of mullets was observed throughout the year, with a peak during April–July. About 50% of the mullets were caught by fishing gear before reaching their first year of age. The level of exploitation (E ≥ 0.60) was more than the optimum level (E = 0.4 for pelagic stock), indicating overexploitation of grey mullets in Chilika Lake. Moreover, the average annual yields of three mullets were observed to be higher than the estimated maximum sustainable yields (MSY), also indicating overharvesting of mullets. Thus, the mullets could be considered one of the highly overexploited resources in Chilika Lake. The findings of this study will facilitate the development of appropriate management strategies for the mullet fishery in Chilika Lake.
... 2 REFERENCES [1] Ferhat, Kalayci., Necati Samsun., Sabri Bilgin., and Osman Samsun (2007). ..... more ... 2 REFERENCES [1] Ferhat, Kalayci., Necati Samsun., Sabri Bilgin., and Osman Samsun (2007). ... assessment International Journal of Natural and Engineering Sciences Pan-American Journal of Aquatic Sciences Gokhan Gokce, Ilker Aydın and Cengiz Metin (2007). ...
The growth features of a commercially important fish species, i.e. Etroplus suratensis (local nam... more The growth features of a commercially important fish species, i.e. Etroplus suratensis (local name "Kundala") was studied in the Chilika Lagoon. In total, 4192 of E. suratensis samples were measured with their total length during the period of June 2008 to May 2009. Different cohorts were identified through multiple length frequency analysis on the total length of these species and their growth curves were estimated. The estimated growth parameters like, L inf (cm), K, and t0 was 33.7cm, 0.20, and 0.01 for the species respectively. Length at 50% maturity (L 50) of the fish samples was also examined. The estimated L 50 for E. suratensis was 165mm (TL). Length-weight relationship (LWR) of Etroplus suratensis also estimated and the equation found y = 1E-05x 3.134 (n=118) for male, y = 3E-05x 2.998 (n=184) for female and y=2E-05X 3.101 (n=302) as unsexed samples. Here the computed growth coefficient (b) was 3.134, 2.998 and 3.101, where the regression coefficient (r 2) was 0.9...
The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyce... more The study deals with the diversity and spatial distribution of the dinoflagellate class Dinophyceae in Chilika lagoon, north east coast of India. Thirty-eight species of dinoflagellates belonging to eight families were recorded, of which twelve are new reports to the lagoon. Of the twenty-six species recorded earlier, Neoceratium furca, Neoceratium fusus, Dinophysis caudata and Noctiluca scintillans were common among most of the earlier studies. Current study recorded presence of Dinophysis miles, which has not been encountered ever since it was first reported from the lagoon six decades ago. An updated checklist of dinoflagellates indicated presence of 68 species in the lagoon. The outer channel of the lagoon differed from southern and central sectors in distribution of dinoflagellates under the influence of salinity regime.
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