FISHERY BULLETIN: VOL. 75, NO. 4 



B 



FIGURE 27.— Right olfactory rosette 

 and nasal cavity in juveniles of six 

 species of sciaenids: A. Larimus fas- 

 ciatus; B. Cynoscion regalis; C. Bair- 

 diella chrysoura; D. Micropogonias un- 

 dulatus; E. Menticirrhus saxatilis; F. 

 Leiostomus xanthurus. Dotted circles 

 represent nostrils, the anterior nostril 

 to the right. 



TABLE 9. — Number of laminae in olfactory rosettes in juveniles of six species of sciaenids from the York River. 



Species 



(size in mm SL) 



10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 N 



Larimus fasciatus 



(55.3-107) 

 Cynoscion regalis 



(35.2-86.4) 

 Bairdiella chrysoura 



(30.0-75.3) 

 Micropogonias undulatus 



(35.5-116) 

 Menticirrhus saxatilis 



(29.2-99.6) 

 Leiostomus xanthurus 



(47.4-148) 



3 5 2 5 15 12.6 



16647512112 36 15.9 



222846263— — 1 — 1 37 16.8 



11— — 33433 — 21232 — 2111 134 19.5 



1— — 166336321 32 17.3 



12443276 — 151— — 1 37 21.7 



correlation between body shape and feeding 

 habitat (Figure 28). Young Larimus fasciatus are 

 oblong, relatively deep, and have a compressed 

 body and a double truncate tail (Figure 28 A). 

 These features, in combination with a strong 

 oblique mouth and large eyes (Figure 20A, A'; Table 

 5), indicate that L. fasciatus is a moderate swim- 

 mer that feeds in the upper water column by sight. 



Young C. regalis have a more fusiform and com- 

 pressed body, and a long pointed tail (Figure 28B). 

 These features, in combination with a large 

 lique mouth and relatively large eyes (Figure 20B, 

 20B, B'; Table 5), indicate that C. regalis is a fast 

 swimmer that feeds in the upper to middle water 

 column by sight. Young B. chrysoura have an ob- 

 long and compressed body, and a broad and 



688 



