Validity of Otoliths and Pectoral Spines for Estimating Ages of Channel Catfish

Buckmeier, David L.; Irwin, Elise R.; Betsill, Robert K.; Prentice, John A.

doi:10.1577/1548-8675(2002)022<0934:vooaps>2.0.co;2

Cited by 109 publications

(185 citation statements)

References 13 publications

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“…Each fish was weighed to the nearest gram, measured to the nearest mm, sexed, aged, and fecundity was calculated. We used the lapilli otoliths to age each fish, which were removed by cranial dissection and dried before sanding (Buckmeier et al, 2002). We sanded the otoliths using 800-grit fine sandpaper dampened with water, until the nucleus was visible, similar to Buckmeier et al (2002).…”

Section: Methodsmentioning

confidence: 99%

Assessment of the Middle Mississippi River Channel Catfish Population

Bueltmann

Phelps

2015

Copeia

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Harvest regulations are important for fishes that are both commercially and recreationally sought after such as Channel catfish (Ictalurus punctatus) throughout the Middle Mississippi River. Monitoring total harvest and understanding Channel catfish population dynamics (i.e., recruitment, growth, and mortality) are crucial for managing a sustainable population. Total commercial harvest and current harvest regulations in the Middle Mississippi River have not recently been evaluated. Thus, we evaluated total commercial harvest reports from 1945-2012 along with commercial fishing effort, population dynamics for the Middle Mississippi River Channel catfish population, and simulated the effects of various length limits on the reproductive potential and yield per recruit of the Channel catfish population. Overall, total commercial harvest has drastically declined from 1990-2012, while commercial effort has remained relatively constant. We speculate overexploitation as a possible cause to the decline in harvest given relatively constant commercial fishing effort. We collected 501 Channel catfish from the Middle Mississippi River during spring, summer, and fall of 2012-2013. Channel catfish were weighed, measured, aged (via lapilli otoliths), and egg samples were collected for fecundity estimates to obtain population level information. We used the static form of the spawning potential ratio (SPR) and the yield per recruit model to simulate variable exploitation rates at three different length limits (e.g., 356 mm, 381 mm, and 406 mm). Our yield per recruit simulation modeling results identified that a 381 mm length limit would not lead to growth overfishing until exploitation rates were between ,50 and 70%. Furthermore, simulation modeling predicted that the SPR was not below a critical minimum conservative threshold of 20% until exploitation rates reached between 50 and 70%; therefore, the population appears to be sustainable under the current length limit of 381 mm, if exploitation rates do not exceed 50-70%.

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Section: Methodsmentioning

confidence: 99%

Assessment of the Middle Mississippi River Channel Catfish Population

Bueltmann

Phelps

2015

Copeia

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“…Sections approximately 0.5 mm thick were cut through the dorsal and anterior processes. This location minimises the influence of the central lumen (Buckmeier, 2002). Photographs were taken of all pectoral spines for image analyses, which were carried out by means of ImageJ software (1.26 version).…”

Section: Back-calculation Of Total Lengthsmentioning

confidence: 99%

Growth of black bullheadAmeiurus melas(Rafinesque, 1820) in Corbara Reservoir (Umbria – Italy)

Pedicillo

Bicchi

Angeli

et al. 2008

Knowl. Managt. Aquatic Ecosyst.

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The age and growth of the invasive black bullhead Ameiurus melas (Rafinesque, 1820) were studied in the Corbara Reservoir, an artificial lake located on the River Tiber in central Italy. The results of the research revealed that the population was made up of eight cohorts, the oldest specimens being spawned in 1999. The sex ratio appears to be balanced, although females predominate in the younger cohorts, while the percentage of males increases among older specimens. The differences between sexes in the slope of the length-weight relationship were not statistically significant; the slope for the whole sample (b = 3.055) was significantly greater than 3, indicating an allometric growth pattern of the black bullhead. There were no significant differences in mean back-calculated lengths at age between the sexes. Analysis of Lee's phenomenon revealed the existence of differential mortality among younger individuals (1 and 2 years old) that favours larger individuals. The Von Bertalanffy growth function was TL t = 35.69 {1 -exp[-0.18 (t + 0.27)]}. The specimens caught displayed mean relative weight (W r ) values distinctly below 100 at all ages, while no significant difference emerged between the sexes with regard to condition. RÉSUMÉCroissance du poisson-chat Ameiurus melas (Rafinesque, 1820) dans le Lac Corbara (Ombrie -Italie) L'âge et la croissance du poisson-chat invasif Ameiurus melas (Rafinesque, 1820) ont été étudiés dans le Lac Corbara, un lac artificiel situé le long du cours du fleuve Tevere, en Italie centrale. Les résultats de la recherche ont révélé que la population était composée de huit classes d'âges, les spécimens les plus âgés provenant de la fraie de 1999. Le sex-ratio semble être équilibré, bien que les femelles prédomi-nent dans les classes d'âges plus jeunes, tandis que le pourcentage de mâles augmente parmi les spécimens plus âgés. Les différences entre les sexes en matière de pente du rapport longueur-poids n'étaient pas significatives ; la pente de tout l'échantillon (b = 3.055) était significativement supérieure à 3, indiquant que le poisson-chat a un modèle de croissance allométrique. Aucune différence significative n'a été constatée entre les longueurs rétromesurées moyennes des différents sexes au même âge. L'analyse du phénomène de Lee a révélé l'existence d'une

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“…Annuli were counted under a dissecting microscope with a fiber-optic light source. Two readers independently estimated the ages of fish without knowledge of fish length and disagreements were resolved by reexamining otoliths and mutually determining age (Buckmeier et al, 2002). To account for growth that occurred prior to the formation of annuli, one year was added to the number of visible annuli.…”

Section: Age Determinationmentioning

confidence: 99%

Mercury Concentrations in Fish from Lake Meredith, Texas: Implications for the Issuance of Fish Consumption Advisories

McClain

Chumchal

Drenner

et al. 2006

Environ Monit Assess

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We examined how length of fish is related to mercury concentrations in muscle tissue of seven species of fish from Lake Meredith, Texas and determined how sex and growth rate are related to mercury concentration in walleye (Sander vitreus). Flathead catfish (Pylodictis olivaris), walleye and white bass (Morone chrysops) had the highest concentrations of mercury and channel catfish (Ictalurus punctatus), common carp (Cyprinus carpio), river carpsucker (Carpiodes carpio) and gizzard shad (Dorosoma cepedianum) had the lowest concentrations of mercury. Mercury concentrations were positively correlated with total length (TL) of fish for all species except gizzard shad, which exhibited a negative correlation between mercury concentration and TL. Male walleye grew more slowly than females, and males had higher concentrations of mercury than females. We also assessed the differences in fish consumption advisories that would be issued using Texas Department of State Health Services (DSHS) guidelines versus United States Environmental Protection Agency (USEPA) recommendations. Using DSHS guidelines, no fish species in Lake Meredith would be issued a fish consumption advisory. Nevertheless, DSHS has issued an advisory for walleye in Lake Meredith, possibly due to an inadequate sample size of fish. Using USEPA guidelines, a fish consumption advisory would be issued for the largest size class of flathead catfish but no advisory exists for flathead catfish in Lake Meredith. We suggest that when fish in a lake may be contaminated with mercury, all game fish in the lake should be assessed, and mercury advisories should take fish size into account.

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Validity of Otoliths and Pectoral Spines for Estimating Ages of Channel Catfish

Cited by 109 publications

References 13 publications

Assessment of the Middle Mississippi River Channel Catfish Population

Assessment of the Middle Mississippi River Channel Catfish Population

Growth of black bullheadAmeiurus melas(Rafinesque, 1820) in Corbara Reservoir (Umbria – Italy)

Mercury Concentrations in Fish from Lake Meredith, Texas: Implications for the Issuance of Fish Consumption Advisories

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