Genetic variation in physiological adaptation of local, exotic and crossbred ducks to heat stress in a tropical environment



Biotic and abiotic environmental factors significantly contribute to the well-being and performance of farm animals. Thermal adaptation is central to livestock survival, performance and profitable enterprise most especially in hot tropical and sub-tropical environments characterized with high environmental temperatures. Heat tolerance of 106 adult Muscovy (Cairina moschata) (20 males and 20 females), Mule (Anas sterilis) (14 males and 12 females) and Mallard (Anas platyrhynchos) (20 males and 20 females) ducks was investigated through physiological indices {respiratory rate (RR), panting rate (PR), skin temperature (ST) and rectal temperature (RT)} collected at two periods {morning (7.00 – 8.30 hours) and afternoon (12.00 – 13.30 hours)}. Variance analysis revealed significant (P<0.05) effect of genotype, period, genotype-period and genotype-sex interactions on heat tolerant indices. The higher physiological indices of Mallard ducks as reflected in genotype, genotype-period interaction and genotype-sex interaction effects compared to Muscovy and Mule ducks indicated physiological stress and poor thermal tolerance. Syntheses of results in this study indicated that Muscovy and Mule ducks were genetically superior in heat tolerance and have higher adaptive capacity to thrive better in sub-optimal hot environment.


Genotype; heat tolerance; panting rate; physiological indices; thermal adaptation

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Genetics and Biodiversity Journal (GABJ)

ISSN: 2602-5582

Department of Biology, Faculty of Natural Sciences and Life, Earth Sciences and the Universe, University of Tlemcen PO.Box 119,  13000 Tlemcen, Algeria.

Copyright ©2017 University of Tlemcen - ALGERIA


Biodiversity conservation (animal):
Associate editor:
Canada, Dr Amanda Cordova,,, Biomedical Sciences, University of Guelph Toronto• (Reproduction Biotechnologies and Conservation)
Germany, Prof Sven Herzog,, Chair of Wildlife Ecology and Management, Technische Universität Dresden, Dresden, Saxony (Gestion de la biodiversité)
Nigeria, Dr Abdul-Mojeed Yakubu, Dpt. of Animal Science, Nasarawa State university (Génomique des populations: Animaux)
Algérie, Boumerdes Dr Adjlane Noureddine,, Dept de Biologie, University M'Hamed Bougara (microbiologie)
Algérie, Bejaia Dr Mourad Ahmim, Dpt. of Environmental and biological sciences, University of Bejaia.  (Conservation de la nature: faune sauvage)
Algérie, Souk-Ahras Dr Hana soualah alila, University Mohamed Cherif Messaadia (Gestion de la biodiversité)
Poland, Dr Jakub Skorupski,, University of Szczecin, Department of Ecology and Environmental Protection (Gestion de la biodiversité)