Pre- and post-spawning condition descriptors for the Indian major carp, Cirrhinus mrigala

Mrigal or Cirrhinus mrigala (Hamilton 1822) is one of the important aquaculture species in India. During 2017, mrigal contributed 5.7% to the aquaculture production of India. The present study was undertaken to describe the hatchery-level pre-and post-spawning condition, i.e. weight changes in the length-weight relationships (LWRs) and the weight-weight relationships (WWRs) associated with the two phases for the mrigal males and females used as broodstock from a commercial IMC hatchery. For the 18 pairs of individuals sampled, the TL (total length) ranged from 42-55 cm and 39-54 cm, and the BW (body weight) from 0.83-1.46 kg and 0.52-1.35 kg respectively for males and females. The GSI was recorded at 10.5% for males and 20.4% for females. The pre-and post-spawning weights differed significantly in both sexes based on paired t-test. Trends in the LWR and weight-weight slopes have been discussed in the article.

Automated summary

The study describes the weight changes in the length-weight relationships (LWRs) and the weight-weight relationships (WWRs) of mrigal males and females used as broodstock in a commercial IMC hatchery. Significant differences in pre-and post-spawning weights were observed in both sexes. Trends in the LWR and weight-weight slopes are discussed in the article.