Index 



207 



Rhabdias, as parasites, 141 

 Rhizophora salina, 68, 71 

 Rio Lerma, Mexico, 50 

 rivers, 9 



unstable, 92 

 rotifers, carbon dioxide poisoning, 

 59 



development, 60 



in brackish water, 44 



parasitic on crabs, 67 



salt tolerance, 72 

 routes from the sea, 17 

 Ruppia, 44 

 rushes, 32 



safety, 64 



Sdgartid, oxygen used, 58 



S. luciae, 34 

 salamanders, assortive mating, 63 



in caves, 39, 40 



marbled, 62 



parasites, 67, 140, 141 



plethodontid, evaporation, 89 

 oxygen, 102 

 segregation, 53 



reproduction, 131, 132 



respiration, 103, 106 

 salation, of water, 41 

 Sdlicornia, beach zone, 19 



in marshes, 33 

 salinities, 71 



changes, 17, 75 



estuarine, 24, 28 



high, in pools, 44 



in aquaria, 45 



in marshes, 33, 36 



in respiration, 58 



in sand, 38 



in zonation, 54 



of blood, 8 



of crab blood, 113 



of sea water, 82, 113 



ranges in Crustacea, 30 



resistance to changes, 31, 73, 76 



survived by Mytilus, 43 



toleration, 34, 77 

 salmon, development, 61 



euryhalin, 84 



secrete salt, 97 



spawning, 66 

 Scaphuld celox, 17 



S. deltde, 17 

 schizopods, in Elbe estuary, 28 

 Scirpus, beach zone, 19 

 scup, oxygen used, 58, 101 

 Scylld, respiration, 109 

 sea bass, oxygen used, 58 

 sea level changes, 4 

 seals, breeding sites, 63 



locomotion, 125 

 seasonal migrations, 23 



periodicities, 91 

 sediment, 69 



dependence on, 55 

 segregation, 52 

 selachians, 25 



in fresh water, 31 

 senses, of soil animals, 38 

 sensory organs, 128, 136, 143 

 serpent-head fishes, 36 



on land, 60, 87 

 Sesdrma, respiration, 109 



S. hdemdtocheir , blood salinity, 

 113 



S. pictum, blood salinity, 113 



