Portugal.

• Main Authors: M. H. Galante, Luisa M. P. Valente
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Ayala; Salmo salar
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.626.8020; http://arch-anim-breed.fbn-dummerstorf.de/pdf/2007/at07si1p006.pdf

Temperature effects on muscle fibres number at hatch and first feeding in blackspot seabream (Pagellus bogaraveo) (Temperatureinflüsse auf Muskelfaseranzahl beim Schlupf und erster Fütterung beim Graubarsch (Pagellus bogaraveo)) It has been shown that the thermal experience during the earliest phases of development can determine the larval and postlarval growth characteristics of teleosts (Clupea harengus, VIEIRA and JOHNSTON; 1992; Salmo salar, STICKLAND et al., 1988; Dicentrarchus labrax L., AYALA et al., 2000, 2001). In order to investigate the effects of the early temperature regime on prelarval stages of growth of Pagellus bogaraveo, this species was exposed during egg incubation until larvae mouth opening (vitelline phase) at two temperatures: natural temperature ( ± 14 ºC) and 18.0 ± 0.01 ºC. Muscle growth was studied by morphometric and immunostaining techniques. The total number of fibres was counted in body cross sections, at both the postopercular and perianal levels. High incubation temperature accelerated embryonic (hatching) and prelarval (mouth opening) development. In newly hatched larvae, myotomes showed