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Table 2 Mate choice trials under treatments to control sensory cues in northern blue P. zebra from Nkhata Bay and northern orange P. emmiltos

From: Assortative mating among Lake Malawi cichlid fish populations is not simply predictable from male nuptial colour

Female

Treatment

Male

Cumulative Binomial Probability (one-tailed)

  

P. emmiltos

P. zebra

 

P. emmiltos

(NO)

Control: free contact; white light

12

0

< 0.001

 

Treatment 1: free contact, monochromatic light

11

1

0.005

 

Treatment 2: visual only, white light

7

5

0.386

P. zebra

(NB)

Control: free contact, white light

5

7

0.386

 

Treatment 1: free contact, monochromatic light

7

5

0.386

  1. Female preference for conspecific P. emmiltos males was maintained under monochromatic light, but lost when non-visual cues were blocked (response variable is the number of replicates in which the majority of the clutch was laid next to a male of a particular species). Significant p-values (α = 0.05) are in bold.