Appendix G 



Commercial Species Age and Growth 



Reach 15 of the Upper Mississippi River 



Description 



Page 



Part I. Summary tables on age and growth of unionid mussels from 

 Reach 15 of the Upper Mississippi River. 

 Table G-1 : Number of years to reach minimum commercial size. 



Table G-2 : Number of years to reach sexual maturity. 



Table G-3 : Formulas to calculate unionid age from shell length or height. 



Table G-4 : Formulas to calculate morphological shell measurements 



from unionid age. 

 Table G-5 : Illiniwek (RM 492.4) - regression parameters of 



morphological shell measurements. 

 Table G-6 : Sylvan Slough (RM 485.8) - regression parameters of 



morphological shell measurements. 

 Table G-7 : Formulas to calculate (a) live weight and (b) dry shell weight 



from shell length or height. 

 Table G-8 : Estimated abundance and weight of commercially sized /4. 



plicata and M. nervosa. 



Part II. Average observed morphological shell measurements of 

 commercial mussel species of various ages from Reach 15 of 

 the Upper Mississippi River, 1987 and 1994-95. 

 Table G-9 : Amblema plicata - Threeridge 



Table G-10 : Megalonaias nervosa - Washboard 



Table G-11 : Ouadnda qiiadnda - Mapleleaf 



Table G-12 : Ouadnda pustidosa - Pimpleback 



Table G-13 : Ouadnda metanevra - Monkeyface 



Part III. Calculated morphological shell measurements of commercial 

 mussel species of various ages from Reach 15 of the Upper 

 Mississippi River, 1987 and 1994-95. 



Table G-14 : Amblema plicata - Threeridge 



Table G-15 : Megalonaias nervosa - Washboard 



Table G-16 : Ouadrula quadnda - Mapleleaf 



Table G-17 : Ouadnda pustidosa - Pimpleback 



Table G-18 : Ouadnda metanevra - Monkeyface 



Part IV. Growth curves for commercial mussel species from Reach 15 

 of the Upper Mississippi River, 1987 and 1994-95. 



Figure G-1 

 Figure G-2 

 Figure G-3 

 Figure G-4 

 Figure G-5 



Amblema plicata - Threeridge 

 Megalonaias nervosa - Washboard 

 Ouadrula quadnda - Mapleleaf 

 Ouadnda pustidosa - Pimpleback 

 Ouadnda metanevra - Monkeyface 

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