Pattern of Pigment Migration in Second Cheliped of Macrohrachium rosenhergii with Morphotypic Transformation

Madhusoodana Kurup B.; Ranjeet K.

doi:10.56093/ft.v39i2.17990

Authors

Madhusoodana Kurup B. School of Industrial Fisheries, Cochin University of Science and Technology
Ranjeet K. School of Industrial Fisheries, Cochin University of Science and Technology

https://doi.org/10.56093/ft.v39i2.17990

Keywords:

Macrohrachium rosenhergii, Morphotypes, Chromatophores, Pigment Migration

Abstract

Changes in cell shape of chromatophores and subsequent pigment migration on the second cheliped of the three main male morphotypes of Macrohrachium rosenhergii are discussed. Cell enlargement as part of pigment accumulation in chromatophore was found to be maximum in Blue clawed males (1.5 \im), followed by Orange clawed males (1.1 m) and Small males (0.65 (im) in male morphotypes of M. rosenhergii. The concentration of pigments at localized sites facilitated by chromatophoric extension through microtubules gave characteristic orange and blue colour to the cheliped, which could directly or indirectly be modulated by the chromtophoric hormones (CH) or pigment dispersing hormones (PDH).