Culture of Atlantic halibut (Hippoglossus hippoglossus) and Pacific halibut (Hippoglossus stenolepis)

Growing degree-day influences growth rate and length of maturity of Northwest Atlantic halibut (Hippoglossus hippoglussus L.) across the southern stock domain

“…Despite that, older studies can help shape expectations. Female LM50% estimates in this study are consistent with other studies throughout the stock domain (Bowering 1986, Trumble et al, 1993Sigourney et al, 2006). Sigourney et al (2006) estimated female LM50% at 103 cm (CI 94-112 cm) in NAFO divisions 4X5YZ which is comparable to this study for female LM50% at 103 cm in 4X (CI 94-132 cm) and 98 cm in 4W (CI 90-130 cm).…”

“…Sigourney et al (2006) estimated female LM50% at 103 cm (CI 94-112 cm) in NAFO divisions 4X5YZ which is comparable to this study for female LM50% at 103 cm in 4X (CI 94-132 cm) and 98 cm in 4W (CI 90-130 cm). In an area corresponding to NAFO subarea 3, female LM50% was estimated as 119 cm (Trumble et al, 1993) and 125 cm (Bowering, 1986), which corresponds to the larger female LM50% range estimated in this study (113-126 cm). Still, the variation observed in this study precludes us producing definitive LM50% estimate per division.…”

“…1), Sigourney et al (2006) estimated LM50% of male and female halibut to be 80 cm and 103 cm respectively. Whereas, in the colder northerly divisions two earlier studies estimated, male and female LM50% to be 77 cm and 119 cm (Trumble et al, 1993), and 80 cm and 125 cm respectively (Bowering, 1986). Average annual bottom temperature on the southern edge of the stock domain can be ~7°C warmer than on the northern edge.…”

A first glimpse of larval ecology of halibut species in the Gulf of St. Lawrence, Canada

“…The two flatfish species are characterized by discrete stocks in the Estuary and Gulf of St. Lawrence (EGSL) (DFO, 2021; Gauthier et al ., 2021). Despite their high commercial importance, larval ecology remains poorly resolved for both species (Dominguez‐Petit et al ., 2013; Duffy‐Anderson et al ., 2013; Shackell et al ., 2022), and most of the knowledge on early life stages comes from laboratory studies (AH: Blaxter et al ., 1983; Dominguez‐Petit et al ., 2013; Jonassen et al ., 1999; Mangor‐Jensen et al ., 1997; Pittman et al ., 1990; GH: Stene et al ., 1998; Stickney & Liu, 1993). In fact, only about 60 larvae captured at sea have been reported for AH over the whole species distribution (Bergstad & Gordon, 1993; Haug, 1990; Van Der Meeren et al ., 2013).…”