Validation of daily increment formation and the effects of different temperatures and feeding regimes on short‐term otolith growth in Australian smelt <i>Retropinna semoni</i>

Tonkin, Zeb; King, Alison J.; Robertson, Alistar

doi:10.1111/j.1600-0633.2007.00283.x

Cited by 21 publications

(20 citation statements)

References 35 publications

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“…Predictors were either related to covariates, which are consistently reported to have strong influences on fish growth (e.g., fish age and temperature; Tonkin et al 2008;Morrongiello et al 2011a), or were hydrologic variables associated Mean monthly water levels (solid line; metres above sea level) of Lake Dartmouth from 1979 to 2012, including the periods of the initial filling, stable-declining, and refilling phases of the lake. An indicator of annual temperature variability is presented as degree months (grey bars), calculated as the cumulative mean monthly air temperature of Dartmouth township for each year.…”

Section: Discussionmentioning

confidence: 99%

Reservoir refilling enhances growth and recruitment of an endangered remnant riverine fish

Tonkin

Lyon

Ramsey

et al. 2014

Can. J. Fish. Aquat. Sci.

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Rapid increases in native riverine fish populations associated with trophic upsurge immediately following reservoir construction are well documented. Repeated upsurge periods and extended benefits to populations are, however, less understood. We used sclerochronology to investigate fish growth and netting surveys to estimate recruitment and abundance of a lacustrine population of an Australian riverine fish, the Macquarie perch (Macquaria australasica) in Lake Dartmouth. Record low inflows from 1997 to 2008 caused the reservoir to shrink to its lowest volume since construction. Refilling began in 2008, reaching 99% capacity in 2013. We hypothesized that fish growth, recruitment, and abundance would increase in response to the refilling of the lake, reproducing a similar response to the initial filling period. Our findings supported this hypothesis. Macquarie perch growth, recruitment, and abundance were enhanced during the refilling of Lake Dartmouth. Growth, best explained by the effects of dam height, change in dam height, temperature (and their interactions), and recruitment, were highest during the first years of refilling when lake levels and temperatures were low. We propose one or a combination of varying levels of intraspecific competition (low during initial filling and high following population expansion) and improved riverine conditions for reproductive success as the most plausible explanation. Our results suggest extended periods of low lake levels followed by rapid inundation events are likely to enhance recruitment and population growth opportunities for this species. While reservoir construction in general impacts negatively on native fish populations, the potential to offset these impacts for conservation management purposes should be considered.Résumé : Les augmentations rapides de populations de poissons de rivière indigènes associées à la poussée trophique qui suit immédiatement la construction d'un réservoir sont bien documentées. La compréhension de périodes de poussée trophique successives et de leurs avantages pour les populations demeure toutefois plus limitée. Nous avons utilisé la sclérochronologie pour étudier la croissance des poissons et des relevés au filet pour estimer le recrutement et l'abondance d'une population lacustre d'un poisson de rivière australien, la perche de Macquarie (Macquaria australasica) dans le lac Dartmouth. Des débits entrants d'une faiblesse record de 1997 à 2008 ont fait diminuer le volume du réservoir jusqu'au point le plus bas enregistré depuis sa construction. Le nouveau remplissage a débuté en 2008, pour atteindre 99 % de la capacité du réservoir en 2013. Nous avons postulé que la croissance, le recrutement et l'abondance des poissons augmenteraient en réponse à ce nouveau remplissage du lac, une réaction semblable à celle observée durant le remplissage initial. Nos constatations appuient cette hypothèse. La croissance, le recrutement et l'abondance des perches de Macquarie ont augmenté durant le nouveau remplissage du lac Dartmouth. La croissance, qu'ex...

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Section: Discussionmentioning

confidence: 99%

Reservoir refilling enhances growth and recruitment of an endangered remnant riverine fish

Tonkin

Lyon

Ramsey

et al. 2014

Can. J. Fish. Aquat. Sci.

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“…Significance of food and temperature was not different between radius and diameter, so all measurements were made with otolith radius. Relative importance of each factor was calculated from relative proportion of variability in growth, explained by each factor respectively (Tonkin et al ., ). An allometric BI model, L T = L 0 − b R 0 c + b R c , (Vigliola et al ., ), where L 0 is larvae size at hatch, R 0 is otolith radius at hatch, R is otolith radius, b is the slope coefficient of the L T – R relationship and c is the allometry coefficient, was fitted by non‐linear least squares to examine the OSG relationship.…”

Section: Methodsmentioning

confidence: 99%

Can backcalculation models unravel complex larval growth histories in a tropical freshwater fish?

Starrs

Ebner

Fulton

2013

Journal of Fish Biology

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This experimental study compared the precision and accuracy of the biological intercept (BI), modified fry (MF) and time-varying growth (TVG) backcalculation models in estimating the early growth of the tropical freshwater purple-spotted gudgeon Mogurnda adspersa. Larvae were reared up to 41 days post hatching under two temperatures and four different feeding regimes. Food and temperature treatments induced complex growth profiles among fish, and although total length (LT ) and otolith radius were related under all conditions, some uncoupling was evident in the otolith-somatic-growth (OSG) relationship of fish subjected to periods of changing food availability. Furthermore, otolith growth was found to be significantly influenced by temperature, but not by food availability. Analysis of backcalculation residuals by linear mixed effects modelling revealed that BI and TVG were equally precise in predicting somatic growth, with the highest accuracy provided by TVG. The performance of all the three models declined as the OSG relationship weakened under low-food conditions, with maximum errors estimated to be 39, 60 and 36% of observed LT for the BI, MF and TVG models, respectively. The need for careful validation of backcalculation models is emphasized when examining fishes subjected to variable environmental conditions, and when exploring the differential influence of temperature and food on fish LT and otolith growth.

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“…Daily periodicity of increments has been validated in otoliths for many fish species during early life stages [11,12], and width of the daily increment typically reflects daily growth rate [14,15]. Environmental variables (e.g., water temperature and food availability) are important factors influencing early growth and, consequently, growth trajectories in otoliths of fish [13,16]. In the waters along the middle and lower reaches of the Yangtze River, water temperature in the spring spawning season is lower than in the autumn spawning season of N. taihuensis, which could induce variations in early growth and development and, consequently, otolith microstructure between the fish born in the two seasons.…”

Section: Introductionmentioning

confidence: 99%

Identification of individuals born in different spawning seasons using otolith microstructure to reveal life history of Neosalanx taihuensis

Liu

Wang

et al. 2011

Fish Sci

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Otolith microstructure was used to distinguish specimens of Neosalanx taihuensis born in spring and autumn. Increment width during the early life stage was significantly narrower for spring-born than autumn-born juveniles, and the frequency distributions of the width of the first 5 increments were distinctive and diagnostic. Otolith growth trajectories and frequency distribution of the first 5 increments of spring-spawning adults displayed similar patterns to spring-born juveniles. Otolith growth trajectories of autumn-spawning adults were intermediate between those of spring-and autumn-born juveniles, and the frequency distribution of the width of the first 5 increments showed two modes, one similar to spring-born juveniles and the other similar to autumn-born juveniles. Populations of N. taihuensis have previously been shown to be dominated by spring-spawning fish. Thus, the putative life history of N. taihuensis can be summarized as: (1) a small part of the spring-born fish mature and spawn in autumn of the year of their birth, (2) the majority of the spring-born cohort matures and spawns in spring of the next year, and (3) offspring of the autumn-born fish mature and spawn in autumn of the following year. This stockstructure information should be considered in fisheries management for this species.

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Validation of daily increment formation and the effects of different temperatures and feeding regimes on short‐term otolith growth in Australian smelt Retropinna semoni

Cited by 21 publications

References 35 publications

Reservoir refilling enhances growth and recruitment of an endangered remnant riverine fish

Reservoir refilling enhances growth and recruitment of an endangered remnant riverine fish

Can backcalculation models unravel complex larval growth histories in a tropical freshwater fish?

Identification of individuals born in different spawning seasons using otolith microstructure to reveal life history of Neosalanx taihuensis

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