Growth Rate and Disease Resistance of Inbreds and Novel Intra-specific Crossbreds Larva of Clarias gariepinus (Burchell, 1822) in Response to Pseudomonas aeruginosa Challenge
Journal Title: Journal of Experimental Agriculture International - Year 2017, Vol 16, Issue 6
Abstract
Aim: To assess the differences in survival rate and Growth Rate (GR) in larva of novel inbred (CC) and crossbred (CS and SC) genotypes of C. gariepinus in response to P. aeruginosa disease challenge, in order to explore their potentials for improved aquaculture. Study Design: Completely Randomized Block Design. Place and Duration of Study: Department of Aquaculture and Fisheries Management, University of Ibadan, Nigeria, between June and November, 2015. Methodology: Sixty individuals of four weeks old C. gariepinus inbred-CC (individuals not possessing serration at anterior portions of both sides’ pectoral spine-C) and SS (Individuals possessing the serrations-S) and crossbred-SC (maternal-S x paternal-C) and CS (maternal-C x paternal-S) strains were immersed in 500 ml water containing 0.01ml of 2.56x107 cfu/ml P. aeruginosa inoculums for 30 minutes. Challenged and control treatments were reared in freshwater for two weeks. Specimens were monitored for clinical signs, survival (%) and growth rate during 2weeks post challenge rearing period. Results: At P= .05, values of survival and growth rates were significantly different across genotypes as well as across control and challenged treatments of each genotype. Fish from challenged treatments were sluggish, lost appetite, and had hemorrhage. 100% challenged-SC and 20.62±1.15% challenged-CC died within 72 hours; during this period, all control treatments, challenged-CS and challenged-SS survived. At 2weeks, survival rates (%) were higher in control than challenged SC (37.5±17.7:0.00) and CC(77.5±3.5:25.0±5.5), but similar (100%) in SS and CS. GR was 0.02±0.00 in control-SC. GR were significantly higher in challenged compared to control in CC, SS and CS: 0.20±0.01: 0.01±0.00, 0.46±0.03: 0.26±0.01 and 1.05±0.12: 0.33±0.02 respectively. Conclusion: Paternal serrated crossbreed (CS) of C. gariepinus tolerated P. aeruginosa infection with superior survival and growth rate, thus indicating high potential for aquaculture in the face of the disease challenge, while maternal serrated crossbreed (SC) was highly susceptible.
Authors and Affiliations
O. O. Oyebola, S. B. Setufe
Keywords
Related Articles
- EP ID EP315270
- DOI 10.9734/JEAI/2017/32653
- Views 99
- Downloads 0
Application of Spectroscopy for Nutrient Prediction of Oil Palm
Oil palm crop has been an important source of income to Malaysian economy, thus it is important to ensure the crops obtain optimum nutrient supply to achieve a higher productivity. This study aimed to investigate the abi...
Empirical Analysis of Allocative Efficiency among Fadama Food Crop Farmers in Adamawa State, Nigeria
The study examined allocative efficiency and its determinants among fadama food crop farmers in Adamawa State, Nigeria using the stochastic cost frontier approach. A single-stage estimation procedure was used where socio...
Activity of Catambra Extracts against Meloidogyne spp.
Aims: In this study we tested four Catambra commercial formulates (hydroalcoholic extracts) used as insecticides in Italy, against Meloidogyne incognita and Meloidogyne javanica. Catambra plant (Ambrogios, Catalpa) a Eu...
Genetic Diversity Analysis of Ethiopian Coriander (Coriandrum sativum L.) Genotypes for Seed Yield and Oil Content
Genetic diversity is highly significant for the improvement of many crop species including coriander. Eighty one Ethiopian coriander genotypes were evaluated in 9x9 simple lattice design with two replication for genetic...
Statistical Analysis for Correlated Paired-plot Designs
This work is aimed to evaluate different statistical analysis with a randomized complete block design for paired-plot studies of herbicide selectivity in sugarcane experiments. Two procedures were considered: i) the con...