Striped Trumpeter Biology

Biology

SpeciesLatris lineata
Common NameStriped Trumpeter
ImportanceKey
HabitatExposed reefs and rocky bottom
Depth≤ 300 m (Edgar, 2008; Gomon et al., 2008)
DistributionSydney (New South Wales) to Albany (Western Australia), Tasmania, New Zealand, Amsterdam Islands (southern Indian Ocean) and most of temperate southern hemisphere (excluding South Africa and South America) (Edgar, 2008; Gomon et al., 2008)
DietSmall fish, cephalopods, crustaceans (Nichols et al., 1994)
Stock StructureUniform stock structure in Tasmanian waters (no significant genetic separation of populations)
MovementJuvenils have limited movement, remaining around shallow reefs for several years before moving into deeper waters on offshore reefs; adults have the capacity to undergo wide-scale movements (Tasmania to St Paul Island, Indian Ocean) (Tracey and Lyle, 2005; Lyle and Jordan, 1999; Tracey et al., 2007a)
M (Natural Mortality)0.096 (Tracey and Lyle, 2005)
Maximum Age (years)43 (Tracey and Lyle, 2005)
Maximum Length (total length; cm)1200 (Gomon et al., 2008)
Maximum Weight (g)2500 (Gomon et al., 2008)
Unsexed K (von Bertalanffy growth parameter)0.08
Juvenile K (von Bertalanffy growth parameter)0.43
Unsexed t0 (age (years) when length = 0)3.49
Juvenile t0 (age (years) when length = 0)0.03
t^δ (age (years) of transference from one growth phase to the next)4.4
Unsexed L∞ (asymptotic von Bertalanffy length (fork length; cm))87.16
Juvenile L∞ (asymptotic von Bertalanffy length (fork length; cm))53.28
L^δ (length of transference from one growth phase to the next; fork length; cm)45.01
Growth Rate (non-von Bertalanffy)Rapid juvenile growth (mean fork length (FL) = 28 cm after 2 years, 42 cm after 4 yars) and slower adult growth (large rang of size-at -age over 50 cm FL); growth for both sexes described by a two-phase von Bertalanffy growth function
Length (FL; fork length (mm)) – Weight (W; g) RelationshipW=2E^(-5) L^3.00 (Murphy and Lyle, 1999; Tracey and Lyle, 2005)
Size at Maturity (length (fork length; cm) at which 50% of population are sexually mature)54 (62 cm total length for females), 53 (61 cm total length for males)
Age at Maturity (age (years) at which 50% of population are sexually mature)6.8 (females), 6.2 (males) (Tracey et al., 2007a)
Spawning SeasonJuly – early October depending on geographic location (early start and finish at lower latitudes)
Other Spawning InformationMultiple spawners, highly fecund (100 000 to 400 000 eggs for females weighing 3.2 and 5.2 kg respectively); small pelagic eggs (Ruwald, 1991; Ruwald et al., 1991; Murphy and Lyle, 1999)
Batch Fecundity (F; number of eggs) to Fork Length (FL; mm)F = 4.15^(-8) FL^4.69 (Tracey et al., 2007a)
Egg Size1.3 mm diameter (Ruwald, 1991; Ruwald et al., 1991; Murphy and Lyle, 1999)
RecruitmentHighly variable; no stock-recruitment relationship established (Murphy and Lyle, 1999)
Early Life HistoryComplex with extended larval phase of at least 9 months; no information on size and timing of settlement; juveniles around 18 cm fork length (23 cm total length) have been caught on shallow reefs of southeast coast in January (Ruwald, 1991; Ruwald et al., 1991; Murphy and Lyle, 1999)