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dc.creatorFessehaye, Y.
dc.creatorBovenhuis, H.
dc.creatorRezk, M.
dc.creatorPonzoni, R.
dc.creatorKomen. H.
dc.date.accessioned2018-11-06T10:28:50Z
dc.date.available2018-11-06T10:28:50Z
dc.date.issued2007
dc.identifierhttp://www.wageningenacademic.com/Fishponds-e?sg=%7B6EAFE27C-54EB-4A02-B836-9154D2C20DDF%7D
dc.identifier.citationIn: van der Zijpp, A.J. ; Verreth, J.A.J. ; Le Quang Tri ; van Mensvoort, M.E.F. ; Bosma, R.H. ; Beveridge, M.C.M. (eds.). Fishponds in farming systems. pp. 37-48
dc.identifier.isbn9789086860135
dc.identifier.urihttps://hdl.handle.net/20.500.12348/1739
dc.description.abstractMass selection based on mass spawning can present a feasible and low-cost selective breeding scheme. In mass spawning, however, mating is not controlled and a small number of breeding individuals may account for a lafgeproportion of the next geperation, leading to higher inbreeding, decrease in performance of stocks and no response to selection: To understand the mating systems, reproductive and population parameters under mass spawning, we conducted mass spawnings with female to male sex ratios of 1:1,2:1 and 3:1. We analysed parentage, established the effective number of parents contributing to the next generation and calculated reprodtlctive parameters and the associated level of inbreeding in an experimental breeding unit. Considering the breeding units as basic building blocks, mass selection breeding programmes based on mass spawning can be implemented by extrapolating the number of breeding units depending on the size of the nucleus and the intensity of selection. Such schemes require minimum investments in infrastructure and can be adopted as a model for low-cost and effective selective breeding schemes that will produce the desired response without compromising the long-term fitness of culture populations due to inbreeding.
dc.formatapplication/pdf
dc.languageEn
dc.publisherWageningen Academic Publishers
dc.titleMass spawning of Oreochromis niloticus for fry production: threats and opportunities for small-scale aquaculture and selective breeding
dc.typeBook Chapter
dcterms.bibliographicCitationFessehaye, Y. et al. (2007). Mass spawning of Oreochromis niloticus for fry production: threats and opportunities for small-scale aquaculture and selective breeding. In: van der Zijpp, A.J. ; Verreth, J.A.J. ; Le Quang Tri ; van Mensvoort, M.E.F. ; Bosma, R.H. ; Beveridge, M.C.M. (eds.). Fishponds in farming systems. pp. 37-48
cg.identifier.worldfish757
cg.subject.agrovocaquaculture
cg.subject.agrovocbreeding
cg.subject.agrovocfish larvae
cg.subject.agrovoctilapia
cg.subject.worldfishsmall-scale aquaculture
cg.subject.worldfishfry
cg.identifier.statusLimited access
cg.contribution.worldfishauthorRezk, M.A.
cg.description.themeSustainable aquaculture
cg.identifier.urlhttp://www.wageningenacademic.com/Fishponds-e?sg=%7B6EAFE27C-54EB-4A02-B836-9154D2C20DDF%7D


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