Papers by Sivashanthini Kuganathan
Thalassas: an International Journal of Marine Sciences, Mar 30, 2023
Zenodo (CERN European Organization for Nuclear Research), Nov 17, 2022
Asian Fisheries Science
The developmental stages of the whipfin silverbiddy Gerres filamentosus gonads were recorded macr... more The developmental stages of the whipfin silverbiddy Gerres filamentosus gonads were recorded macroscopically and microscopically. Histological sections of gonads characterized seven stages of ovary and four stages of testes in G. filamentosus. Ova diameter in G. filamentosus ranged between 12.0 and 501.8 μm. The composite histograms based on the diameters of all oocytes at successive stages of maturation showed three modes in ovaries at stages III, IV, V & VI. Most of the fully ripe ovaries characterized three batches of matured eggs showing that G. filamentosus spawns three successive batches within the same prolonged spawning season. Indication of previous spawning was ascertained by the ruptured ovarian follicles and resorbing ovulated ova and atretic ovarian follicles observed during October-February. The silverbiddy males reach maturity at 143.8 mm, while the females at 136.6 mm total length. The annual fecundity varied from 121,700 to 2,062,278 while batch fecundity varied from 171,596 to 740,844 oocytes. * Tel: +94 21 222 5925; Fax: +94 21 222 2685 E-mail address: [email protected] Asian Fisheries Science 21(2008):127-145 128
Pakistan Journal of Zoology, 2021
Authors' Contribution AESP was responsible for data collection, designing, analyzing and writing ... more Authors' Contribution AESP was responsible for data collection, designing, analyzing and writing the manuscript. SK guided in the statistical analyzing. SK and UE were involved in overall guidance and correction of the manuscript.
Sri Lanka Journal of Aquatic Sciences, 2021
Jaffna lagoon (9° 50' N and 79° 50' E to 9°20' N and 80° 30' E) is the largest la... more Jaffna lagoon (9° 50' N and 79° 50' E to 9°20' N and 80° 30' E) is the largest lagoon in Sri Lanka and it provides many services including fishing opportunities to the people in northern Sri Lanka. However, the status of the Jaffna lagoon fishery is not fully known at present due to the lack of detailed studies over the last 40 years. Therefore, this study was designed to fulfil this research gap. Both primary data and secondary data were used in this study. Primary data, including catch and fishing effort were collected at three major landing sites, Gurunagar, Paasaiyoor, and Kachchai by making fortnight field visits from March to December 2019. Secondary data of the monthly total catch and fishing effort were obtained from the district fisheries offices in Jaffna and Kilinochchi districts in order to estimate MSY and FMSY. This study revealed that ~5340 fishers confined to 39 landing sites were actively engaged in lagoon fishing during the study period using 12 dif...
Tropical Agricultural Research, 2015
Catch assessment and frame survey were performed to estimate the species wise and total catch in ... more Catch assessment and frame survey were performed to estimate the species wise and total catch in the Vavuniya reservoir along with hydro-climatic factors. Relationship between the hydro-climatic factors and species wise catch statistics were determined from calendar year, rainfall (RF) and water level (WL) based quarters of the annum. Irregularity in the rainfall pattern shifted the heavy rainfall based quarter from October-December to February-April in 2013. Significant variation (P<0.05) in the species composition of the catch in all the quarters, indicates the non-uniformity of the catch distribution. The WL showed a negative correlation and significant (P<0.05) relationship between catchability. However, the correlation between WL and catch per unit effort (CPUE) with respect to gear (kg/gear/day) was insignificant (P>0.05, r=-0.327) However, there was a strong negative correlation between monthly average WL and CPUE in terms of kg/fisher/day. There were 5 exotic, 13 indigenous and 1 endemic (Esomus thermoicos) species identified. Oreochromis niloticus contributed 79%, Cirrhinus mrigala (8.6%) and Channa striata (7.6%) of the catch. Data obtained from this study may be used as a baseline for the sustainable management and to achieve optimal catch.
Pakistan Journal of Biological Sciences, 2008
Journal of Fisheries and Aquatic Science, 2013
Journal of Fisheries and …, 2009
... Gajapathy Department of Zoology, University of Jaffna, Jaffna, Sri Lanka Abstract: The presen... more ... Gajapathy Department of Zoology, University of Jaffna, Jaffna, Sri Lanka Abstract: The present study was carried out to gain some knowledge on length-weight relationship ... II lies between approximately 79° 52&amp;amp;quot; E to 80° 38&amp;amp;#x27;E longitude and 9&amp;amp;quot; 26&amp;amp;#x27;N to 9D 4G&amp;amp;#x27;N latitude and has an ...
... During these phases, lipid levels decrease in the liver and muscle tissue and increase in the... more ... During these phases, lipid levels decrease in the liver and muscle tissue and increase in the gonads (James and Elizabeth, 2003; Zaboukas et al., 2006). ... Water influences quality attributes such as appearance, texture and storage stability (Andersen and Rinnan, 2002). Fig. ...
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Papers by Sivashanthini Kuganathan