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International Journal of Zoology and Applied Biosciences Research Article
Effects of life stages, spawning and fighting behaviours on bimodal respiration in Siamese fighting fish, Betta splendens (Regan)
Shanthi Y Pon Indira and R. James
Year : 2018 | Volume: 3 | Issue: 2 | Pages: 206-211
Received on: 02/14/2018
Revised on: 04/06/2018
Accepted on: 04/08/2018
Published on: 04/30/2018
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Shanthi Y Pon Indira and R. James( 2018).
Effects of life stages, spawning and fighting behaviours on bimodal respiration in Siamese fighting fish, Betta splendens (Regan)
. International Journal of Zoology and Applied Biosciences, 3( 2), 206-211.
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Abstract
Bimodal respiration was studied in Siamese fighting fish Betta splendens in relation to life stages, spawning and fighting behaviors. The rates of aquatic and total respiration of test animals were decreased with an advancement of life stages from fry to adult. However, the trend was reversed in aerial respiration. The mean percentage of aquatic respiration was 100, 96, 45 and 46 as against aerial respiration 0, 4.4, 55 and 53 in the fry, fingerlings, adolescent and adult stages of B. splendens respectively. There was no significant (P>0.05) difference found on per-cent aquatic or aerial respiration in adolescent and adult stages of B. splendens. Male individuals exhibited the more metabolic rate (aquatic, aerial and total respirations) at pre- and post-spawning significantly (P <0.01) as compared to female individuals. Aerial respiration was high in male B. splendens prior to fight between themselves while after fighting, aquatic and total respirations were significantly (P<0.05) increased in male individuals. After fighting, aerial respiration was drastically declined to 16 and 19 times in the loser and winner male B. splendens while aquatic respiration was increased to 3 times in both males.
Keywords
Air breathing organ, Respiratory transition, Aggressive male, Energetic cost, Betta splendens.
