HUNTSMAN ET AL.: YIELD PER RECRUIT MODELS 



Table 3.— Status of fishery. M  



instantaneous rate of natural mortality; F = instantaneous rate of fishing mortality; Z = F + M instan- 

 taneous rate of total mortality; Y/R = yield per recruit. 



Species 



M 



estimates 



Value 



Period 



Source 



Fishery 



Recruitment Age 

 size (mm) (yr) 



Y/R available 



alF = 



Percent 

 max. Y/R 



Red porgy 



020 

 035 



White grunt 



030 

 0.57 



Red snapper 



Black sea 

 bass 



0.16 

 0.25 

 34 



( 2 ) 



30 



50 

 Speckled hind 20 



Snowy grouper 0.13 



Gag 



Scamp 



20 



036 



0.17 



065 



197274 



067 



73 



038 



053 



085 



1972-73 



1972-75 



1974-78 



Manooch and 

 Huntsman 1 977 



Grimes, 

 pers. 

 commun. 



Manooch 1 977 



Nelson and 

 Manooch 1982 



Headboat 



Commercial 

 handline 



Commercial 

 trawl 



Headboat 



Commercial 

 Handline 



Commercial 

 trawl 



Headboat 



Commercial 



handline and 



trawl 

 Headboat and 



commercial 



handline 



Commercial 

 trawl 



Headboat 



Commercial 

 handline and 

 trawl 



Headboat 



All fisheries 



Commercial 

 handline 



Headboat 

 Commercial 



handline 

 Headboat 



1972-75 

 Headboat 



1977-79 

 Commercial 



handline 



300 



or 



325 



300 



200 



or 

 250 



225 



or 



250 



300 



200 



250 



or 



300 



4.1 



4.3 



4.1 



2.1 

 26 



3.5 



3.8 



4 5 



3.3 



44 

 5.9 



species 

 rarely taken 



500 



450 



400 



6.0 



50 



4.0 



030 

 0.45 

 0.30 

 0.45 

 0.30 

 0.45 

 030 

 0.45 



0.32 

 0.27 

 0.17 

 0.32 

 0.27 

 0.17 

 0.32 

 027 

 17 

 032 

 0.27 

 0.17 

 043 

 16 

 0.43 

 0.16 



022 

 0.13 

 0.04 



0.22 



0.13 



0.04 



0.53 shallow 



0.30 deep 



365 



750 

 800 



500 

 350 

 400 



3.3 



1.0 



6.6 

 8.0 



1.0 

 66 

 80 

 5.4 



3.1 



40 



0.05 



0.25 



0.11 



"036 



600 



950 

 920 



1.050 



036 



0.68 



800 



900 



50 



73 

 70 



58 



89 



100 



'Churchill B. Grimes, Department of Horticulture and Forestry, Rutgers University, P.O. Box 231. New Brunswick. NJ 08903. 



2 M of 40 omitted because it was greater than estimated F. 



3 R. H. Matheson. and G R. Huntsman. 1983. Growth, mortality, and yield per recruit models for speckled Umd\Epmephelus drummondhayi) and snowy grouper |f. mveatus) 

 from the U.S. South Atlantic Bight Unpubl. manuscr. 13 p. Southeast Fisheries Center Beaufort Laboratory, National Marine Fisheries Service. NOAA, Beaufort. NC 28516- 

 9722. 



*F for gag assumed to be same as for scamp which occupies same habitat and is taken simultaneously with same gear. 



5 R. H. Matheson III, C. S Manooch III, and G. R. Huntsman. 1983. Growth, mortality, and yield per recruit models for the scamp, Mycteroperca phenax Unpubl. manuscr. 14 

 p. Southeast Fisheries Center Beaufort Laboratory, National Marine Fisheries Service, NOAA. Beaufort. NC 2851 6-9722. 



691 



