Proceedings of the Workshop on Challenges, Opportunities and Constraints faced by Women in Agriculture and Allied Industries

Proceedings of the Workshop on Challenges, Opportunities and Constraints faced by Women in Agriculture and Allied Industrie

Occurrence of Scleractinian corals from the outer Gulf of Kachchh, West coast of India

Coral reefs of the outer Gulf of Kachchh were surveyed for abundance and occurrences of scleractinian coral. The survey was conducted in the intertidal zone of three selected sites, namely Okha, Mithapur, and Shivrajpur. The maximum live coral cover area percentage was observed at Shivrajpur (72 %) followed by Mithapur (55.5 %) and Okha (45 %). In the present study, 23 species of scleractinian corals belonging to eight different families and 12 genera were recorded. The highest numbers of the scleractinian corals were recorded from the Shivrajpur with 22 species belonging to 12 genera followed by Mithapur with 16 species belonging to ten genera, and Okha 12 species belonging to eight genera. The Poritidae family contributed the highest number of scleractinian coral species assemblage followed by the Faviidae and Merulinidae family at all the stations. Geo-morphology of the coast and anthropogenic pressures are the two factors that seemed to have more impact on the distribution and diversity of scleractinian corals

Assessing the impact of environmental factors influencing the spatio-temporal distribution of Johnius belangerii (Cuvier, 1830) Belanger's croaker along Mumbai, Northwest Coast of India

903-907The aim of this study was to assess the impact of environmental factors influencing the spatio-temporal distribution of Johnius belangerii. Fishery independent fortnightly resource surveys were conducted in Mumbai waters from September, 2017 to May, 2018 to determine the effect of environmental variables on spatio-temporal distribution. A Generalized Additive Modelling (GAM) approach showed that distribution and abundance of J. belangerii varied spatio-temporally, and environmental factors were found to be influential. GAM models demonstrated that higher catch was located in waters of Sea Surface Temperature (SST) from 25.1 - 31.1  °C with Sea Bottom Temperature (SBT) values ranging from 26-31 °C and salinity of more than 34 0/00. Correlation of environment variables with Catch per Unit Effort (CPUE) suggests significant relationship with SST (0.81), SBT (0.85) and Sea Bottom Chlorophyll-a (0.73). The result of this study will be helpful for clearly understanding the intricacies of spatial distributions of fish in relation to changing habitat condition which will be useful in the sustainable management of aquatic resources

Fisher perceptions on impacts of jellyfish swarming on fishing operations along the Gujarat coast, India

The study provides local perceptions on the regional challenge caused by jellyfish hindrances in fishing operations and the potential causes of abnormal jellyfish swarming along the Gujarat coast, India. A semistructured questionnaire framework was used along with an enumeration-based schedule to collect the data during 2017-2020. The data were collected through surveys and interviews from different fishing units along the Gujarat coast

On the morphological variations of geographically isolated migratory and non-migratory populations of Tropical shad, Tenualosa ilisha (Hamilton, 1822) from three distinct tropical ecosystems

1189-1196The migratory tropical shad, Tenualosa ilisha has a wide range of habitat preferences like rivers, reservoirs, estuaries, backwaters, and coastal waters during different phases of its life cycle. The present study investigates morphological variations among three populations of Hilsa from distinct ecosystems such as the River Brahmaputra, Narmada estuary and Ukai reservoir. Thirteen morphometric and nine meristic measurements were considered for the present study. Among the meristic traits, significant variation was observed in counts of lateral line scales and post ventral scutes. The MANOVA results depict a significant difference in the morphometric traits among the three populations. The factor analysis indicated a very significant loading of head-related traits on the first factor and traits related to the middle and caudal region on the second factor. The study portrayed a significant morphological variation among the different stocks of T. ilisha and the results were confirmed in discriminant function analysis.</em

Food spectrum dynamics of anadromous Hilsa, Tenualosa ilisha (Hamilton, 1822) inhabiting River Brahmaputra, India curtailing apprehension of food selectivity: An insight into its domestication

Food and feeding habits of Tenualosa ilisha collected from two sampling locations in Brahmaputra River, Assam, India for a period of 12 months from May 2018 to April 2019 were studied. Index of preponderance revealed semi-digested animal matter (25.92 %) as the most dominant food item followed by Bacillariophyta (23.32 %). 31 genera of phytoplankton and 15 genera of zooplankton were observed in the gut of the species. Major groups of zooplankton include cladocerans, copepods, followed by rotifers, while diatoms, green algae and blue green algae were dominant phytoplankton groups. The anadromous tropical shad is planktivorous by nature and has a preference for zooplankton in smaller size groups (&lt; 250 mm) and phytoplankton in larger size groups (&gt; 250 mm). GaSI values (mean±SE) ranged from 1.50±0.14 to 6.93±0.89 and HSI values from 0.58±0.06 to 1.54±0.15. Index of fullness was found to range from 7.08±0.42 to 1.81±0.40. Feeding intensity, GaSI, HSI values showed seasonal variation, found to be low during October to December and high during February to June. Size group-wise analysis of feeding intensity showed high feeding intensity in lower size groups (&lt; 250 mm) and comparatively low feeding intensity and high percentage of empty stomachs in higher size groups (&gt; 250 mm). RLG values ranged from 1.181±0.028 to 1.450±0.052. Monthly average RLG values were found to be highest during November and in the size group of 351 – 400 mm. Changes in food composition were noticed in both months and as well as size groups

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Not AvailableThe present study was carried out in the estuarine area of Vasai creek in Maharastra during the year 2016, the larvae and juveniles of sea anemone were found in the zoolplankton sample which was first time observation in this area. The larvae were found more abundant towards the mouth of estuary where salinity ranges from 30-35 ppt.Not Availabl

<i>Coeloseira compressa</i> hollenb. (Champiaceae, Rhodophyta) - A new marine algal species from Goa, India

37-41Occurrence of a red algal species Coeloseira is recorded from Bambolim coast, Goa along the central west coast of India. The genus is characterised by the presence of polysporangia, stoloniferous pattern branching, separate secondary branches and a group of apical cells. Habitat characteristics are also reported

Subtidal marine algae of the Dwaraka coast (Gujarat)

297-301A total of 35 marine algal species were recorded during a survey of the subtidal flora of Dwaraka. Maximum number of species were found at 5-8 m. depth. Red algal species were dominant (20), followed by green (8) and brown (7). The biomass at 5 m depth was 2.044 kg/m(2) and comprised of species of Caulerpa, Dictyota and Spatoglossum. The similarity index calculated between intertidal and subtidal species of Dwaraka was 43.40, indicating that the subtidal floral composition is as diversified as that of the intertidal region

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Not AvailableMacrobenthic algae and grazers like gastropods, amphipods etc. eventually form a key component of intensified grazing ecosystem in rocky intertidal area. Grazing gastropods suppresses the abundance of canopy forming algal species, thus lead to a reduced algal diversity in the long term. We conducted feeding trials with single and mixed diet during a 28–Days indoor experiment to examine the grazing intensity among green, red and brown algae namely Ulva lactuta, Enteromorpha linza, Gelidium and Padina tetrastromatica following a gut content analysis of experimental gastropods such as Euchelus asper and Nerita oryzarum. Feeding experiments revealed that Euchelus asper consumed 70% Enteromorpha, 10% Ulva and about 10% Gelidium whereas, Nerita oryzarum consumed 45% Ulva and 10% Enteromorpha during single diet experiment. Euchelus asper showed its preference towards all experimental diet where as Nerita preferred Ulva to a greater extends than Enteromorpha and rest other combined diet. Our results showed a higher grazing pressure exerted by Euchelus asper might pose a threat for algal culture and form competition in animals of same trophic level intern affecting their population. Similar experiment may be useful to control mass canopy forming algal growth and habitat studies for grazing animals will also be attributed.Not Availabl