@conference {79026,
	title = {Chinook salmon (Oncorhynchus tshawytscha) feed conversion efficiency: evaluation and potential for selection},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {72},
	year = {2012},
	month = {Jan},
	pages = {227-230},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Christchurch},
	abstract = {Improving performance through selective breeding is a key priority for the New Zealand Chinook salmon (Oncorhynchus tshawytscha) aquaculture industry. The family selective breeding programme operated by The New Zealand King Salmon Company has successfully improved growth and quality after six generations of selection. However, feed conversion efficiency is not currently a direct breeding goal. Research was established to analyse daily feed intake and feed conversion ratio, a measure of feed efficiency, in 160 families over two spawning year classes. Daily feed intake assessment methodology employing digital X-radiography was validated and used to obtain repeated measurements of daily feed intake. Measurements of growth, and feed conversion ratio up to harvest size were also obtained. Genetic parameter estimates for daily feed intake and feed conversion ratio indicated that there are family differences for these traits. As a result the continued measurement of feed conversion ratio in The New Zealand King Salmon families and incorporation of the traits into The New Zealand King Salmon breeding programme is being considered.},
	issn = {1176-5283},
	author = {Walker SP and Ingram M and J Bailey and Dodds KG and Fisher PJ and Amer PR and Symonds JE}
}
@conference {79025,
	title = {Developing broodstock resources for farmed marine fish},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {72},
	year = {2012},
	month = {Jan},
	pages = {222-226},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Christchurch},
	abstract = {he expansion of New Zealand aquaculture will benefit from diversification into new high value finfish such as Yellowtail kingfish (Seriola lalandi) and Hapuku (groper, Polyprion oxygeneios). To ensure success, domesticated selected broodstock need to be established along with systems that can reliably produce high quality gametes and juveniles. Collections of wild Kingfish and Hapuku broodstock were completed by the National Institute of Water and Atmospheric Research from 2000 onwards. Over 100 wild broodstock have since been reared to establish the parental stocks. Wild females of both species are very fecund and millions of eggs have been produced each breeding season. One of the main challenges is to ensure that multiple parents contribute during spawning to create genetically variable, selected offspring (F1). Due to the current reliance on communal group spawning, multiplex microsatellite DNA marker panels were developed to determine the parentage of the resulting F1 progeny. Although F1 from multiple parents have been identified, some broodstock produced a disproportionate number of the progeny. This has highlighted the need to manage parental contribution to the F1, which would otherwise exclude many individuals from contributing to the gene pool. As a result we are developing techniques to control mating and to maximise the number of founding wild parents in the programme.},
	issn = {1176-5283},
	author = {Symonds JE and Walker SP and Van de Ven I and Marchant A and Irvine G and Pether S and Gublin Y}
}
@conference {79024,
	title = {Family-based selective breeding of New Zealand Abalone, Haliotis iris: challenges and opportunities},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {72},
	year = {2012},
	month = {Jan},
	pages = {216-221},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Christchurch},
	abstract = {In 2007 the National Institute of Water and Atmospheric Research in New Zealand initiated a family-based selective breeding programme for the New Zealand Abalone, Haliotis iris, with commercial partner OceaNZ Blue Ltd. to investigate the genetics of key performance traits in a cold water and a warm water site and the influence of the early rearing environment on family performance. A total of 101 Abalone families were established using farmed and wild broodstock from multiple locations around New Zealand. Families were reared separately for nine to 14 months prior to tagging at ~15-20 mm shell length and then combined. Families were also pooled during early rearing, up to seven days post-fertilisation and later genotyped. This allowed estimation of individual tank environment effects on family performance. Length, weight and growth rate have been recorded bi-annually plus evaluation of quality traits such as foot darkness and shell colour at a market size of ~80 mm. Relative family performance has generally been consistent across sites, but is moderately influenced by early environment. The growth traits were found to be highly heritable with high genetic correlations among traits indicating good response to selection for increased growth can be expected.},
	issn = {1176-5283},
	author = {Symonds JE and Moss G and Jopson NB and Roberts R and Birss J and Heath P and Walker SP}
}
@conference {41239,
	title = {Optimal utilization of genetic resources in aquaculture},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {61},
	year = {2001},
	month = {Jan},
	pages = {35-37},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Christchurch},
	abstract = {This paper uses a vertically integrated salmon farming company as a case study to describe how quantitative genetics  and decision support optimisation tools have been used in an aquaculture breeding programme. The complex tasks of  maximising genetic progress while managing genetic diversity and avoiding inbreeding are considered at two levels. The  first level relates to the management of a nucleus breeding structure for which long term genetic progress and management  of genetic diversity are the primary objectives. The second level relates to the tactical selection among available broodstock  candidates and their mating to avoid inbreeding. The importance of both effective data management systems and practical implementation of theoretical genetic principles is emphasised.},
	issn = {1176-5283},
	author = {Amer PR and Jopson NB and Dodds KG and Symonds JE and Hills J}
}
