Daily otolith increment validation in larval mackerel icefish, Champsocephalus gunnari

Morley, Simon A.; Belchier, Mark; Dickson, J.; Mulvey, T.

doi:10.1016/j.fishres.2005.04.008

Cited by 18 publications

(12 citation statements)

References 6 publications

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“…The growth rate we estimated in early larvae of D. hunteri from western Ross Sea (0.11 mm/day) is very similar in other larval channichthyids, ranging between 0.07 and 0.17 mm/day in Champsocephalus gunnari from South Georgia (North 1988;Morley et al 2005), and 0.11 and 0.16 mm/day in Chaenocephalus aceratus from King George Island (Slosarczyk 1987).…”

Section: Discussionsupporting

confidence: 62%

Some biological characteristics of early larvae Dacodraco hunteri (Notothenioidei: Channichthyidae) in the western Ross Sea

2011

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Ichtyoplankton surveys were carried out in the western Ross Sea by the R/V Italica in the austral summer 1996 and 1997-1998 to study species composition and spatial distribution of larval stages of fish. One of the most abundant icefish caught was Dacodraco hunteri, a poorly known channichthyid inhabiting the high-Antarctic Zone. Based on 382 yolk-sac larvae and 13 preflexion larvae, the study was focused to estimate spatial distribution and abundance, as well as diet and growth rate. The pigmentation pattern and some morphometric measurements were also recorded for comparative purposes. The specimens were caught in relatively restricted areas located in Terra Nova Bay and north of the Ross Ice Shelf on the Challenger and Joides Basins. The standardized abundance of early larvae ranged between 0.03 and 1.72 individuals 10 -3 m 3 in 1996 and 0.16-4.53 individuals 10 -3 m 3 in 1997-1998, respectively. Fitting a linear model to the mean length increase in larvae collected in subsequent catch dates, the growth rate was estimated to be approximately 0.11 mm/day. Based on back calculation of growth rate and presumed hatch size of 11 mm, larval hatching probably took place in mid-December. Diet of preflexion larvae consisted exclusively of larvae of the pelagic nototheniid Pleuragramma antarcticum, a key species of the high-Antarctic pelagic food web. Hence, D. hunteri probably plays a more important role than previously thought in the pelagic community of the Ross Sea.

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Section: Discussionsupporting

confidence: 62%

Some biological characteristics of early larvae Dacodraco hunteri (Notothenioidei: Channichthyidae) in the western Ross Sea

2011

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“…However, the validation of daily increment formation in different species is still a necessary prerequisite to otolith microstructure work of any kind (Campana and Neilson 1985). Validation methods include the monitoring of known-age fish in the laboratory (Mugiya and Tanaka 1992;Chang et al 1994;Xie et al 1995a, b;Fu et al 1997), marking with fluorescent substances (Villanueva and Molí 1997;Song and Cao 1999;Arai et al 2000;Cieri and McCleave 2001;Sugeha et al 2001), statistical inferences (Joyeux et al 2001;Morley et al 2005), and marginal increment analysis (Moku et al 2005). Among these methods, monitoring of known-age larvae was regarded as the most accurate and reliable method of validating daily increments, and was frequently used (Campana 2001).…”

Section: Discussionmentioning

confidence: 99%

Validation of daily otolith increments in larval and juvenile Chinese sucker, Myxocyprinus asiaticus

Song

et al. 2007

Environ Biol Fish

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Otolith development was observed and the formation of daily growth increments in otoliths of Chinese sucker, Myxocyprinus asiaticus, was validated by monitoring known-age larvae and juveniles in the laboratory from 2003 to 2005. Otolith shape changed with larval and juvenile development, and there was an exponential relationship until a body length of 16 mm or so, and a linear relationship after a body length of 16 mm between otolith size and fish size. The first increment was identified in larvae 1 day after hatching. The regressed equations between daily age (D) and increment number in otoliths (N) were N = À0 . 6 4 + 0 . 9 6 D i n l a p i l l u s , a n d N = À0.31 + 0.98D in sagitta. The slopes were not significantly different than 1.0. This demonstrated that otolith increments in this species were formed daily and can be used for daily age determination.

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“…This could be due to the presence of embryonic increments and to the rearing conditions, mainly temperature. The age at first increment deposition is species specific (Jones, 1986;Høie et al, 1999;Morley et al, 2005). Usually, initial increment formation on otoliths is associated with hatching, first feeding, or the start of activity (Morales-Nin, 2000;Joh et al, 2005).…”

Section: Age Of First Increment Depositionmentioning

confidence: 99%

“…But, without proper validation, reconstruction of early life history events using otolith growth increments is dubious (Beamish and Mcfarlane, 1983;Cieri and McCleave, 2001). Daily growth increment deposition has been validated in many fish species living under optimal conditions (Campana and Neilson, 1985;Jones, 1986;Siegfried and Weinstein, 1989;Villanueva and Molí, 1997;Quiñonez-Velázquez, 1999;Morley et al, 2005;Xie et al, 2005). But some works indicate that the daily deposition of otolith increments is not a universal feature of all larvae in all conditions (Geffen, 1982;Campana and Neilson, 1985;Jones, 1986;Jones and Brothers, 1987;Radtke and Fey, 1996).…”

Section: Introductionmentioning

confidence: 99%

Validation of daily increments deposition in the otoliths of European anchovy larvae (Engraulis encrasicolus L.) reared under different temperature conditions

et al. 2008

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Daily otolith increment validation in larval mackerel icefish, Champsocephalus gunnari

Cited by 18 publications

References 6 publications

Some biological characteristics of early larvae Dacodraco hunteri (Notothenioidei: Channichthyidae) in the western Ross Sea

Some biological characteristics of early larvae Dacodraco hunteri (Notothenioidei: Channichthyidae) in the western Ross Sea

Validation of daily otolith increments in larval and juvenile Chinese sucker, Myxocyprinus asiaticus

Validation of daily increments deposition in the otoliths of European anchovy larvae (Engraulis encrasicolus L.) reared under different temperature conditions

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