Browsing WorldFish Community by Author "de Verdal, H."

Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus

de Verdal, H.; O'Connell, C.M.; Mekkawy, W.; Vandeputte, M.; Chatain, B.; Bégout, M.L.; Benzie, J.; Wagdy Mekkawy: 0000-0002-3991-7321; John Benzie: 0000-0001-9599-8683 (2019)

Type: Journal Article

The main hypothesis of the present study was that an aggressive and dominant fish would eat more feed and would be more efficient. To test this hypothesis, estimations of the relationships between agonistic behaviour, ...

Can individual feed conversion ratio at commercial size be predicted from juvenile performance in individually reared Nile tilapia Oreochromis niloticus?

Rodde, C.; Chatain, B.; Vandeputte, M.; Trinh, T.Q.; Benzie, J.; de Verdal, H.; John Benzie: 0000-0001-9599-8683 (2020)

Type: Journal Article

Feed conversion ratio (FCR), the ratio between feed intake and body weight gain, is of major interest for improving aquaculture sustainability through reduced feed costs and environmental impacts. Demonstrating whether FCR ...

The Effects of feed restriction and isolated or group rearing on the measurement of individual feed intake and estimation of feed conversion ratio in juvenile Nile Tilapia (Oreochromis niloticus) for selective breeding purposes

Rodde, C.; Vandeputte, M.; Trinh, T.Q.; Douchet, V.; Canonne, M.; Benzie, J.; de Verdal, H.; John Benzie: 0000-0001-9599-8683 (2021)

Type: Journal Article

Accurately measuring the phenotype at the individual level is critical to the success of selective breeding programs. Feed efficiency is a key sustainability trait and is typically approached through feed conversion ratio ...

Genetic variation in wild populations and farmed stocks of Nile tilapia (Oreochromis niloticus) in Madagascar

Ravakarivelo, M.; Pepey, E.; Benzie, J.; Raminosoa, N.; Rasamoelina, H.; Mikolasek, O.; de Verdal, H.; John Benzie: 0000-0001-9599-8683 (2019)

Type: Journal Article

Four farmed stocks and four wild populations of Nile tilapia (Oreochromis niloticus), which was first introduced to Madagascar sixty years ago, were assayed for genetic variation at nine microsatellite loci to determine ...

Genomic Selection and Genome-wide Association Study for Feed-Efficiency Traits in a Farmed Nile Tilapia (Oreochromis niloticus) Population

Barria, A.; Benzie, J.; Houston, R.; de Koning, D.; de Verdal, H.; John Benzie: 0000-0001-9599-8683; Dirk Jan de Koning: 0000-0001-6343-8155 (2021)

Type: Journal Article

Nile tilapia is a key aquaculture species with one of the highest production volumes globally. Genetic improvement of feed efficiency via selective breeding is an important goal, and genomic selection may expedite this ...

Improving feed efficiency in fish using selective breeding: A review

de Verdal, H.; Komen, H.; Quillet, E.; Chatain, B.; Allal, F.; Benzie, J.A.; Vandeputte, M. (2017)

Type: Journal Article

Improving feed efficiency (FE) is key to reducing production costs in aquaculture and to achieving sustainability for the aquaculture industry. Feed costs account for 30-70% of total production costs in aquaculture; much ...

Individual growth monitoring of European sea bass larvae by image analysis and microsatellite genotyping

de Verdal, H.; Vandeputte, M.; Pepey, E.; Vidal, M.O.; Chatain, B. (2014)

Type: Journal Article

The aims of the present study were to develop non-lethal methods to identify individual fish larvae and post-larvae before tagging and accurately follow their growth characteristics. European sea bass (Dicentrarchus labrax) ...

An investigation of links between metabolic rate and feed efficiency in European sea bass Dicentrarchus labrax

Rodde, C.; de Verdal, H.; Vandeputte, M.; Allal, F.; Nati, J.; Besson, M.; Blasco, F.R.; Benzie, J.; McKenzie, D.; John Benzie: 0000-0001-9599-8683 (2021)

Type: Journal Article

Feed efficiency (FE) is the amount of body weight gain for a given feed intake. Improving FE through selective breeding is key for sustainable finfish aquaculture but its evaluation at individual level is technically ...

Measuring individual feed efficiency and its correlations with performance traits in Nile tilapia, Oreochromis niloticus

de Verdal, H.; Mekkawy, W.; Lind, C.E.; Vandeputte, M.; Chatain, B.; Benzie, J.A.H. (2017)

Type: Journal Article

Estimating individual feed intake of fish held in groups has long been a challenge precluding precise knowledge of the individual variation of feed efficiency (FE) in fish. In this study, counts of the number of feed pellets ...

Population, temperature and feeding rate effects on individual feed efficiency in European Sea Bass (Dicentrarchus labrax)

Rodde, C.; Vandeputte, M.; Allal, F.; Besson, M.; Clota, F.; Vergnet, A.; Benzie, J.; de Verdal, H.; John Benzie: 0000-0001-9599-8683 (2020)

Type: Journal Article

Using breeding programs to improve feed efficiency, the ratio between fish body weight gain (BWG) and feed intake (FI), could increase aquaculture sustainability through reduced feed costs and environmental impact. To this ...

Quantifying the genetic parameters of feed efficiency in juvenile Nile tilapia Oreochromis niloticus

de Verdal, H.; Vandeputte, M.; Mekkawy, W.; Chatain, B.; Benzie, J.A.H. (2018)

Type: Journal Article

Improving feed efficiency in fish is crucial at the economic, social and environmental levels with respect to developing a more sustainable aquaculture. The important contribution of genetic improvement to achieve this ...

Response to selection for growth in an interspecific hybrid between Oreochromis mossambicus and O. niloticus in two distinct environments

de Verdal, H.; Rosario, W.; Vandeputte, M.; Muyalde, N.; Morissens, P.; Baroiller, J.F.; Chevassus, B. (2014)

Type: Journal Article

The development of a saline tolerant tilapia strain able to grow fast is of importance in the Philippines, where 240 000 ha of brackish water ponds are available. To this end, founder hybridization between Oreochromis ...

Sex determination in the GIFT strain of tilapia is controlled by a locus in linkage group 23

Taslima, K.; Wehner, S.; Taggart, J.B.; de Verdal, H.; Benzie, J.; Bekaert, M.; McAndrew, B.J.; Penman, D.J.; John Benzie: 0000-0001-9599-8683 (2020)

Type: Journal Article

Tilapias (Family Cichlidae) are the second most important group of aquaculture species in the world. They have been the subject of much research on sex determination due to problems caused by early maturation in culture ...

Species composition in the Molobicus hybrid tilapia strain

Bartie, K.L.; Taslima, K.; Bekaert, M.; Wehner, S.; Syaifudin, M.; Taggart, J.B.; de Verdal, H.; Rosario, W.; Muyalde, N.; Benzie, J.; McAndrew, B.J.; Penman, D.J.; John Benzie: 0000-0001-9599-8683 (2020)

Type: Journal Article

The “Molobicus” hybrid breeding programme was initiated to improve tilapia growth performance in brackish water. The base population was created by backcrossing F1 Oreochromis niloticus GIFT strains × feral O. mossambicus ...

Variations in isotope incorporation rates and trophic discrimination factors of carbon and nitrogen stable isotopes in scales from three European sea bass (Dicentrarchus labrax) populations

Rodde, C.; de Verdal, H.; Lefebvre, S.; Mennit, C.; Vandeputte, M.; Clota, F.; Allal, F.; McKenzie, D.; Benzie, J.; Nahon, S.; John Benzie: 0000-0001-9599-8683 (2020)

Type: Journal Article

Carbon (δ13C) and nitrogen (δ15N) stable isotope analyses are used in marine ecology to study trophic relationships and migrations of species since they reflect dietary sources consumed which may vary geographically. ...