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iv recaptured by age and year ....................................................................................................24 3e. Numbers of humpback chub marked by age in years 2005-06 and subsequently recaptured by age and year ....................................................................................................25 4. Mark-recapture closed population model estimates of humpback chub abundance greater than or equal to 150-mm total length in the Little Colorado River.......................26 5. Humpback chub adult abundance (age-4+) estimates from the age-structured mark recapture models using data pooled among tag cohorts ..................................................27 6. Humpback chub recruit abundance (age-2) estimates from the age-structured mark recapture models using data pooled among tag cohorts ..................................................28 7. Quantile-quantile and Pearson residual plots for age-structured mark recapture model 1 (ASMR 1) using data pooled among tag cohorts ..................................................29 8. Quantile-quantile and Pearson residual plots for age-structured mark recapture model 2 (ASMR 2) using data pooled among tag cohorts ..................................................30 9. Quantile-quantile and Pearson residual plots for plots for age-structured mark recap- ture model 3 (ASMR 3) using data pooled among tag cohorts..........................................31 10. Humpback chub capture probability by age and year estimated from age-structured mark recapture model3lASMR 3) using data pooled among tag cohorts .....................32 11. Humpback chub adult abundance (age-4+) estimates from the age-structured mark recapture (ASMR) models using data stratified by tag cohort..........................................33 12. Humpback chub recruit abundance (age-2) estimates from the age-structured mark recapture (ASMR ) models using data stratified by tag cohort.........................................34 13. Coefficient of variation of humpback chub adult abundance estimates (age-4+l for data pooled among tag cohorts and stratified by tag cohorts ..........................................35 14. Quantile-quantile and Pearson residual plots for age-structured mark recapture model 1 (ASMR 1) using data stratified by tag cohort ........................................................36 15. Quantile-quantile and Pearson residual plots for age-structured mark recapture model2 (ASMR 2) using data stratified by tag cohort ........................................................37 16. Quantile-quantile and Pearson residual plots for age-structured mark recapture model3 (ASMR 3) using data stratified by tag cohort. .......................................................38 17. Humpback chub capture probability by age and year estimated from age-structured mark recapture model 3 (ASMR 3) using data stratified by tag cohort............................39 18. Frequency of humpback chub growth intervals used in the growth analysis by time- at-large and total length atthe start ofthe growth interval...............................................40 19. Log-likelihood as a function of the penalty weight 12) on the standardized von Berta- lanffy parameters for the temperature-independent growth model ................................41 20. Fit of the sine curve to avera ge monthly Little Colorado River water temperature .....42 21. Fit of the temperature-independent growth model and the temperature-dependent growth model during summer and winter to all observed humpback chub growth-rate (d U dt) data. ........ .... ............................................. ..... .................... ......... .............. ................. ...... .43 22. Fit of the temperature-dependent growth model during summer and winter to observed humpback chub growth-rate (dUdt) data during summer and winter ...........44 23. Predicted humpback chub length-at-age from the U.S. Fish and Wildlife Service growth curve, the temperature-independent growth model, the temperature-depen- dent growth model for the Little Colorado River humpback chub population, and the temperature-dependent growth model for humpback chub living in the mainstem Colorado River under a constant temperature of 100C .......................................................45 24. Predicted monthly growth rate from the temperature-dependent growth model for the Little Colorado River population of humpback chub and for humpback chub living