Spatial and temporal variability in growth of southern flounder (Paralichthys lethostigma)

Midway, Stephen R.; Wagner, Tyler; Arnott, Stephen A.; Biondo, Patrick; Martinez‐Andrade, Fernando; Wadsworth, T

doi:10.1016/j.fishres.2015.03.009

Cited by 27 publications

(30 citation statements)

References 26 publications

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“…We opted to use a hierarchical version of the VBGM (Midway et al. ) that allowed for putative groups (species × sex combinations) to have their own parameter estimates in addition to an overall estimate. This model parameterization, combined with Bayesian estimation, produces posterior estimates of parameter values; the credible intervals of these estimates can be compared for overlap and statistical differences.…”

Section: Methodsmentioning

confidence: 99%

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Age and Growth of Hardhead Catfish and Gafftopsail Catfish in Coastal Louisiana, USA

2019

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The Hardhead Catfish Ariopsis felis and Gafftopsail Catfish Bagre marinus are marine catfishes that have low recreational and commercial landings in U.S. waters, although they are among the most abundant species in coastal waters of the Gulf of Mexico. Few biological studies exist on marine catfishes, with most studies focusing on their unique reproductive biology. This study evaluated weight–length relationships for Gafftopsail Catfish (n = 264) and Hardhead Catfish (n = 823) sampled from across coastal Louisiana, USA, during 2016–2018; subsamples (93 and 266, respectively) were aged using lapilli for age and growth analyses. Hardhead Catfish showed a small but significant difference in weight as a function of length between males and females, with females being slightly heavier than males at any given length. No sexual dimorphism in weight and length was observed in Gafftopsail Catfish. Ages ranged from 0 to 10 years for Gafftopsail Catfish and from 0 to 24 years for Hardhead Catfish. Both sexes of Gafftopsail Catfish attained larger maximum average sizes (asymptotic length L∞) and exhibited larger growth coefficients (k) than both sexes of Hardhead Catfish. Length at age of Hardhead Catfish in Louisiana was greater than that of Florida fish. The estimated k for Gafftopsail Catfish in Louisiana was almost three times greater than that observed in Florida, with fish reaching their L∞ rapidly compared to those in Florida. Given the increasing evidence for an equilibrium life history strategy (i.e., K strategy), the spatial differences in size at age, and the potential for increased exploitation, continued investigations into both species’ biology and life history should be undertaken.

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Section: Methodsmentioning

confidence: 99%

“…Additional model fitting details are provided by Midway et al. (). Models were fitted with diffuse prior probability distributions and with three Markov chains starting with different values.…”

Section: Methodsmentioning

confidence: 99%

Age and Growth of Hardhead Catfish and Gafftopsail Catfish in Coastal Louisiana, USA

2019

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“…We developed a Beverton–Holt modified von Bertalanffy (VB) longevity growth model (Midway et al. ) to estimate length at age from RGCT otolith data in each of the nine stream segments (no otoliths were collected in Polvadera Creek). Since both density and temperature can affect VB growth parameters in fish populations (Sinclair et al.…”

Section: Methodsmentioning

confidence: 99%

Effects of Temperature and Spatial Scale on Rio Grande Cutthroat Trout Growth and Abundance

Huntsman

Martin

Patten³

2018

Trans Am Fish Soc

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Diversity in habitat and life-history strategies promote a species' long-term persistence. However, life-history strategies are most commonly studied at broad spatial and temporal scales. We applied longevity growth models and closed N-mixture models to examine within- versus between stream variability in life-history characteristics of Rio Grande Cutthroat Trout in northern New Mexico streams. We developed a von Bertalanffy growth model and a closed N-mixture model in a hierarchical Bayesian framework to examine the importance of fine-scale variability in temperature and density-dependence on growth and abundance. The model indicated that accumulation of degree days likely positively influenced instantaneous growth rates and, to a lesser extent, negatively affected asymptotic body length. A nonlinear response of abundance to temperature was also observed, suggesting that Cutthroat Trout productivity along the temperature continuum was affected by physiological limitations ( optimal growth temperatures). Parameter variability was greatest at the segment level for asymptotic size and abundance, but greatest at the stream level for the rate at which asymptotic size is reached. In total, the results suggest that fine-scale habitat heterogeneity ( temperature) may play important roles in the continued persistence of Rio Grande Cutthroat Trout. Management actions should, therefore, consider the role of fine-scale processes for improving the likelihood of future population persistence.

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“…To quantify spatial variability in Flathead Catfish somatic growth, we utilized methods similar to those of Midway et al. (). The von Bertalanffy growth equation was incorporated into a Bayesian nonlinear hierarchical modeling framework as follows:

\begin{matrix} y_{ij} = L_{\infty j} [1 - e false(- K_{j} (t_{ij} - t_{0 j}) false)] + {normalϵ}_{ij}, {normalϵ}_{ij} \sim N (0, {normalσ}^{2}) \\ log (\begin{matrix} L_{\infty j} \\ K_{j} \end{matrix}) \sim BVN false(normalμ, normalΣ false), \\ μ = log ({\bar{L}}_{\infty}, \bar{K}), \\ t_{0 j} \sim N false({\bar{t}}_{0}, σ_{t_{0}}^{2} false), \end{matrix}

where y ij is the TL for fish i from population (i.e., river or reservoir) j ; t ij is the observed age for fish i from population j ; and L ∞ j , K j , and t 0 j are the population‐specific von Bertalanffy growth parameters.…”

Section: Methodsmentioning

confidence: 99%

Spatial Variability and Macro‐Scale Drivers of Growth for Native and Introduced Flathead Catfish Populations

et al. 2018

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Quantifying spatial variability in fish growth and identifying large‐scale drivers of growth are fundamental to many conservation and management decisions. Although fish growth studies often focus on a single population, it is becoming increasingly clear that large‐scale studies are likely needed for addressing transboundary management needs. This is particularly true for species with high recreational value and for those with negative ecological consequences when introduced outside of their native range, such as the Flathead Catfish Pylodictis olivaris. This study quantified growth variability of the Flathead Catfish across a large portion of its contemporary range to determine whether growth differences existed between habitat types (i.e., reservoirs and rivers) and between native and introduced populations. Additionally, we investigated whether growth parameters varied as a function of latitude and time since introduction (for introduced populations). Length‐at‐age data from 26 populations across 11 states in the USA were modeled using a Bayesian hierarchical von Bertalanffy growth model. Population‐specific growth trajectories revealed large variation in Flathead Catfish growth and relatively high uncertainty in growth parameters for some populations. Relatively high uncertainty was also evident when comparing populations and when quantifying large‐scale patterns. Growth parameters (Brody growth coefficient [K] and theoretical maximum average length [L∞]) were not different (based on overlapping 90% credible intervals) between habitat types or between native and introduced populations. For populations within the introduced range of Flathead Catfish, latitude was negatively correlated with K. For native populations, we estimated an 85% probability that L∞ estimates were negatively correlated with latitude. Contrary to predictions, time since introduction was not correlated with growth parameters in introduced populations of Flathead Catfish. Results of this study suggest that Flathead Catfish growth patterns are likely shaped more strongly by finer‐scale processes (e.g., exploitation or prey abundances) as opposed to macro‐scale drivers.

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Spatial and temporal variability in growth of southern flounder (Paralichthys lethostigma)

Cited by 27 publications

References 26 publications

Age and Growth of Hardhead Catfish and Gafftopsail Catfish in Coastal Louisiana, USA

Age and Growth of Hardhead Catfish and Gafftopsail Catfish in Coastal Louisiana, USA

Effects of Temperature and Spatial Scale on Rio Grande Cutthroat Trout Growth and Abundance

Spatial Variability and Macro‐Scale Drivers of Growth for Native and Introduced Flathead Catfish Populations

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