Paper in Press

Volume 2, Issue 1, December 2020

Research article

1. Impact of Carp Fish Hatchery on Fish Production and Livelihood of Tribal Communities of Raigad District, Maharashtra

Indulkar, S. T.^1*, R. Pai¹, A. S. Ninawe², S. N. Ogale³, Balasaheb Kolekar³, Ram Akhade³

¹   College of Fisheries ( Dr. Balasaheb Sawant Konkan Agriculture University), Ratnagiri-415629, Maharashtra, India

²   Ex-Advisor,Department of Biotechnology, GOI, New Delhi-110003, India

³   Shramjivi Janata Sahayyak Mandal (NGO), Satara, Maharashtra, India

*   Correspondence: indulkarst@gmail.com

Abstract: After the disastrous floods in coastal area of Maharashtra in July 2005, a number of developmental interventions have been started after the complete relief and rehabilitation activities. The work was initiated for the benefit of tribal community in two blocks of Raigad district, viz Poladpur and Mahad focusing on their socio-economic empowerment and addressing their livelihood issues. The inland fishing is one of the major sources of livelihoods for Katkari, Bhoi, Koli tribal communities. Considering the dearth of fish-seedlings to stock the inland water bodies of the region, a comprehensive carp fish hatchery production unit was established in the year 2011 with an annual capacity of 50 million of fish spawn. This fish hatchery is fulfilling the fish fingerling requirement of the cooperatives and private traders. It is providing quality fish fingerlings of catla, rohu, mrigal and common carp to the tribal inland fishing cooperatives. Several years of intervention by way of technical and financial help, it has helped to enhance the fish production from the reservoirs up to 285 to 385 kg ha^-1 from initial fish production of 11 kg ha^-1 during 2006-07. This increased production was because of regular stocking of fish seed at fingerling stage in the reservoirs and adoption of proper fish harvesting methods. Because of enhancement of fish production per unit reservoir area, there is an increase in annual household income of cooperative members. The average annual household income was Rs. 42,415/- by all sources during the period between 2013-14 to 2016-17, which mainly included fishing activity near dam and river (Rs. 39,011/-); and 56% of 4,774 household i.e.2,680 have stopped migration totally and from the remaining, the migration has been reduced partially by 400 household, who were otherwise used to migrate after the harvest of agricultural crops.

Keywords: Tribal community, Katkari, Fish hatchery, Fish seed, socio economic transformation

Volume 2, Issue 1, December 2020

Research article

2. Study of Mangrove Sediment Characteristics along Mahim Creek of Mumbai Coast

Pravin Sapkale*, S. T. Indulkar, B. T. Sawant and S. D. Patil

Taraporevala Marine Biological Research Station (Dr. B. S. Konkan Krishi Vidyapeeth), 3rd Floor, New Administrative Building, Government Colony, Bandra (East), Mumbai – 51, India

*Corresponding Author: pravinsapkale@gmail.com  

Abstract: Present investigation on mangrove sediment characteristics along Mahim creek of Mumbai coast was conducted to determine the health status of mangrove sediment due to aquatic environmental pollution. This study was carried out from October 2016 to September 2017. Several sediment characteristics like temperature, pH, sand, silt, clay, organic carbon, organic matter, total nitrogen and available phosphate were examined. pH in all the stations was recorded neutral to slightly alkaline. Composition of sand, silt and clay was widely fluctuated during the study period. Sand and clay were relatively maximum with positive skewness and kurtosis than silt content. Organic carbon, organic matter, total nitrogen and available phosphate were found significantly different in June and September as compared to the rest of the months. This study revealed remarkable instabilities in all the sediment characteristics found outside their promising boundaries. This investigation suggests the measures to mitigate contamination of creek and anthropogenic activities. That will conserve the fauna-flora and so progresses the health of creek and accompanied mangroves.

Keywords: mangrove sediment, pH, organic carbon, texture, available phosphate

Volume 2, Issue 1, December 2020

Research article

3. Study on Effect of Different Organic Manures on Growth of Ornamental Aquatic Plant Vallisneria spiralis

Bhawesh Sawant¹, S. D Patil¹, P. H. Sapkale^1*, P. E. Shingare², R.D. Bondre¹, S. S. Gangan¹, V. P. Sahsrabuddhe³, and A. K. Chaudhari⁴

¹    Taraporevala Marine Biological Research Station (Dr. B. S. Konkan Krishi Vidyapeeth), Bandra (E), Mumbai – 51

²  College of Fisheries (Dr. B. S. Konkan Krishi Vidyapeeth), Shirgaon, Ratnagiri-415629

³  College of Horticulture (Dr. B. S. Konkan Krishi Vidyapeeth), Fisheries Research Unit, Mulde

⁴  Research Centre, ICAR-Central Institute of Freshwater Aquaculture, Anand, Gujarat

*  Correspondence: pravinsapkale@gmail.com

Abstract: Present study was undertaken to determine the effect of different organic manures viz. vermicompost, pig dung, raw buffalo dung and combinations of vermicompost & pig dung, pig dung & raw buffalo dung, vermicompost & raw buffalo dung on the growth of Vallisneria spiralis  under laboratory conditions. The runners with initial length of 10 ± 0.30 cm was planted in containers (100 g capacity) containing soil and sand-mixture. The experimental containers were prepared by mixing 2% of different organic manures and soil layers which were used for planting runners of Vallisneria for 28 days in triplicates. Statistical analysis with one-way ANOVA showed significant difference (P < 0 .05) among different manures used, while non- significant difference was found among the treatments for water parameters. The highest average percentage gain in length (65.48) and specific growth rate (68.39 ± 10.36) was observed in the treatment with 2 % buffalo dung (dry) as organic manures in mixture of sand and soil in the 1:1 ratio and same was found as best treatment when compared to other treatments.

Volume 2, Issue 1, December 2020

Review article

4. Impact of Flood on Freshwater Fish Biodiversity of North East Region of India: with Special Reference to Assam

Bibha Chetia Borah

 Fisheries Research Centre, Assam Agricultural University, Jorhat-785013, Assam, India

* Correspondence: drbchetia@yahoo.com

Abstract: Flood is among the most common natural disasters of the world. According to the National Flood Commission (1980), 12% land of Indian subcontinent is prone to flood. Among the regions of the India that are most vulnerable to water induced disasters, the North East Region is the one that experiences devastating flood every year. Every state of the NE region is prone to flood with variable extent, frequency and intensity. The state of Assam is the highest flood affected in the region and is one of the top five flood affected states of the country. The impact of flood is mediated by the magnitude, frequency, duration, timing and rate of change of water levels. Depending on these factors, flood may have both negative and positive impacts on the inundated area. The nature, extent and gravity of the mayhem of flood may vary according to the nature of the resources (culture or capture fisheries), intensity and duration of flood along with many other factors and have tremendous impact on the indigenous fish biodiversity. The NE region of India is known as one of the ‘Hot spot’ for Freshwater Fish Biodiversity of the world. The conservation status revealed that out of the 422 fish species available in the region 48 are endangered, 69 near threatened, 103 vulnerable, 153 least concerned, 23 data deficient and 26 not evaluated. The paper reviews the impact of flood on fish biodiversity of the region with special reference to Assam and way ahead for mitigation and restoration.

Keywords: North East region of India, Biodiversity, Hotspot, Flood, Impact on fish biodiversity, Conservation status, Mitigation