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<p>This study analysed the length–weight relationship and feeding biology of <i>Osteobrama vigorsii</i>, an endemic freshwater fish of the Bhima River basin, Maharashtra. Although not commercially exploited, the species contributes to local food security and ecosystem stability within the Krishna and Godavari River systems. A total of 319 specimens were collected from Veer Dam on the Nira River using gill nets. The length–weight parameters “a” were 0.0059 (males) and 0.00019 (females), while “b” values were 3.12 and 2.52, respectively, indicating differential growth patterns between sexes. Fulton’s condition factor ranged from 0.70–0.98 in males and 0.74–2.07 in females. Stomach content analysis showed an omnivorous feeding habit dominated by aquatic vegetation (36.96%) and aquatic insects (28.26%), followed by phytoplankton (17.39%), worms (8.70%), and fish remains (4.35%). The species exhibited intermediate niche breadth (Bi = 0.48) and low diet diversity (H’ = 1.44), with an estimated trophic level of 2.53 and foraging habitat value of 2.68. These traits highlight vulnerability to dams/pollution disrupting prey flows, underscoring the need for monitoring and flow management to sustain ecosystem roles.</p>

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Ecological relevance of least studied endemic Krishna Osteobrama from the Bhima River basin

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月28日

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  • Thanga Anusya Selvin,
  • Karankumar Ramteke,
  • Ashok Kumar Jaiswar,
  • Mukeshkumar Bhendarkar,
  • Shashi Bhushan,
  • Sri Hari Murugesan,
  • Dayal Devadas,
  • Sonal Rajendra Kalbande

摘要

This study analysed the length–weight relationship and feeding biology of Osteobrama vigorsii, an endemic freshwater fish of the Bhima River basin, Maharashtra. Although not commercially exploited, the species contributes to local food security and ecosystem stability within the Krishna and Godavari River systems. A total of 319 specimens were collected from Veer Dam on the Nira River using gill nets. The length–weight parameters “a” were 0.0059 (males) and 0.00019 (females), while “b” values were 3.12 and 2.52, respectively, indicating differential growth patterns between sexes. Fulton’s condition factor ranged from 0.70–0.98 in males and 0.74–2.07 in females. Stomach content analysis showed an omnivorous feeding habit dominated by aquatic vegetation (36.96%) and aquatic insects (28.26%), followed by phytoplankton (17.39%), worms (8.70%), and fish remains (4.35%). The species exhibited intermediate niche breadth (Bi = 0.48) and low diet diversity (H’ = 1.44), with an estimated trophic level of 2.53 and foraging habitat value of 2.68. These traits highlight vulnerability to dams/pollution disrupting prey flows, underscoring the need for monitoring and flow management to sustain ecosystem roles.