Intraspecific Morphological Variation in Two Common Marine Fish Species from South Africa
Argyrosomus inodorus, feeding niche, geometric morphometrics, intraspecific variation, marine fish, morphology, Pterogymnus laniarius
Intraspecific morphological variation in fish is typically associated with sexual dimorphism, or one of three common environmental gradients: variation in intensity of predation, variation in water velocity, or variation in feeding niche. The preponderance of examples of environment-associated morphological variation within fish species has been documented in freshwater systems. It is not clear whether environment-associated intraspecific morphological variation is less common in marine fishes or whether there has just been a lack of investigation. We used geometric morphometric analysis to quantify shape variation in two species of South African marine fish commonly harvested for human consumption, Pterogymnus laniarius (panga), and Argyrosomus inodorus (silver kob). Neither species exhibited significant sexual dimorphism, but both species exhibited significant intraspecific morphological variation. This variation appears consistent with patterns expected from variation along the benthic-pelagic feeding niche continuum.
Original Publication Citation
Mattson, Eric, and Mark C. Belk. 2013. Intraspecific morphological variation in two common marine fish species from South Africa. The Open Fish Science Journal 6:87-91.
BYU ScholarsArchive Citation
Mattson, Eric and Belk, Mark C., "Intraspecific Morphological Variation in Two Common Marine Fish Species from South Africa" (2013). Faculty Publications. 5425.
The Open Fish Science Journal
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