Page 



Sexual dimorphism 653 



Shad, gizzard (Dorosomu ceprditiniim) 391-425, 



490, 491, 492, 493, 494 



age composition 398 



seasonal changes 398, 411-418 



calculated growth 405-406 



digestive tract 418-420 



food and feeding habits 420-422 



lengths and weights of age groups 403-405 



life history 391 



development and maturation of the egg. 409-41 1 



fecundity 412-413 



hatching and early development. 417-418 



reproduction and early development. . 407-418 



reproduction and spawning 413-417 



length-weight relation 400-403 



ovaries 401-402 



seasonal and annual differences in weight . 402-403 

 scales 



annulus 395-397 



body-scale relation 398 



described 395 



survival rate 399-400 



yellowfin (See Menhaden, yellowfin) 

 Shark: 



blue (Prionace glauca) 635, 636, 680 



bull (Carcharhinus leucas) 593 



cal : 



brown. (Apristurus brunneus) 581, 589, 592 



false (Pseudotriakis mierodon) 583 



filetail (Parmaturus xaniurus) 607 



dogfish: 



Cuban (Squalus cubensis) 590 



smooth (Mustelus canis) 529 



description 529 



food habits 529 



range 529 



size 529 



spiny (Squalus acanthias) 527-554 



age determination 536-538 



birth process 543-544 



birth season 544 



color - 528 



description 528 



distribution 529-530 



fecundity 541-543 



fishery for 545 



food habits 534-536 



growth 536-538 



length-weight 528, 538 



management of 549 



mating 541 



migrations 530 



mortality 544 



mortality rate 550 



population dynamics. ... . 539-545 



populations 538 



predators 544 



reproduction 539-544 



salinity, and 532 



Page 



serology 534 



size at sexual maturity 540-541 



spines 529, 536 



tagging 532-534 



utilization of 545 549 



venom gland . 528 529 



vitamin A 547 



water temperature, and 531 



swell (Cephaloscyllium uter) 581, 591 



Sharks 527 554, 5S1-624, 635, 678 



Sharks: 



cat (Scyliorhinidae) 581-624 



Ampullae of Lorenzini 589 



claspers and clasper siphons 5S7-589, 597 



color and color pattern 585-586 



denticles, dermal 590-591 



denticle crests. 590 



growth.. 590 



distribution and segregation 583-584 



egg cases 582, 586-587 



labial fold 597 



liver shapes 589 



morphometries 596-597,618-622 



nasoral grooves 582 



nictitating membrane 599 



reproduction 582-583, 586-587 



rostral cartilages 582 



shape of body and fins 589, 591 



teeth 591-595, 597 



sexual dimorphism 591-593,597 



tooth formulas 593 



vertebrae : 



diplospondylous 595 



monospondylous 596 



vertebral numbers 595-596 



nurse (Orcctolobidae) 582 



requiem (Carcharhinidae) 635, 678 



Sharks, rays, skates, and chimaeras (Elasmo- 



branchii) 635, 679 



Sheepshead (Archosargus probatocephalus) 370-373 



Shiner: 



emerald (Notropis alherinoides) . 490, 491, 492. 49:'.. 494 

 spottail (Notropis hudsonius) . . 490, 491, 492, 493, 494 



Shrimp, brown (Penaeus aztecus) 314, 326, 374, 438 



Shrimp, penaeid: 



Gulf of Mexico (northwestern) .... ... 437-447 



generic key to  438-444 



larvae 439-443 



myses.... 441,443 



nauplii  439-440 



postlarvae 441, 443 



protozoeae 440, 442 



Shrimp, pink (Penaeus duorarum) 313- 



338, 374, 438, 449-459 



age (size) at recruitment 326, 331-334 



distribution : 



areal ir ' :l :,,: ' 



time ^51 455 



693 



