Data/hora: 01/06/2024 10:49:39

Provedor de dados: | 5
País: | France
Título: | Bases génétiques des caractères physiologiques impliqués dans la croissance chez l'huître creuse Crassostrea gigas (Thunberg)
Autores: | Collet, Bertrand.
Data: | 1998-12-18
Ano: | 1998
Palavras-chave: | Crassostrea gigas; Croissance; Physiologie; Analyse de parenté; Microsatellite DNA; Crassostrea gigas; Growth; Physiology; Parentage analysis; Microsatellite DNA.
Resumo: | Growth is a very important trait in the oyster Crassoslrea gigas both from an economical and scientific point of view. Many questions remain unanswerable or are still discussed . From a hatchery-based population, the constancy in time of growth performances From larval to adult stage was studied. The influence of physiological parameters (energy acquisit ion and expenditure) and parentage on growth was estimated. ln the literature, the relationship between larval growth and post-Iarval growth is debated . Our study shows that the larval growth is positively correlated with the post-Iarval growth. This result validates the hatchery practices consisting in culling the small larvae. The growth performances are stable over the time and show no compensation. The early mortality affects smaller individuals. The effect of rearing density and initial size on the growth was studied in nursery over 3 months. The growth rate at high density represents 70 % o fthis at low density whatever the initial size. The final live weight is explained at 80 % by the initial weight. Parental contribution to the next generation, estimated by a microsatellite marker, is unbalanced at larval and post-Iarval stages. On the other hand, parental contributions change over the time because of difTerential mortality. There is no family efTect on the ofTspring early growth. Physio logical performances were determined 5 times over an annual cycle on the same 30 individuals, continuously for 24 hours. These parameters were proved to be relatively stable over the time. Sorne measures under limited food conditions show different allometry relationships for individuals of the same age than those published on natural population
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/00108/21939/19532.pdf
Editor: | Institut National Agronomique Paris-Grignon( I.N.A.-P.G.)
Relação: | http://archimer.ifremer.fr/doc/00108/21939/
Formato: | application/pdf
Fonte: | 1998 INAPG