Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and raysJohn Tee-Van Sears Foundation for Marine Research, Yale Univ., 1953 |
Dall'interno del libro
Risultati 1-3 di 95
Pagina 29
... young are not only produced in fresh water but that they thrive there . But there is no reason to suppose that any young that may be produced by stray females north of Florida would survive the cold of the succeeding winter . Gravid ...
... young are not only produced in fresh water but that they thrive there . But there is no reason to suppose that any young that may be produced by stray females north of Florida would survive the cold of the succeeding winter . Gravid ...
Pagina 71
... young specimens of the two , for R. cemiculus has a row of sharp spines along each rostral ridge whereas R ... Young of the two differ more noticeably ; those of R. percellens have more numerous but much smaller mid- dorsal thorns and ...
... young specimens of the two , for R. cemiculus has a row of sharp spines along each rostral ridge whereas R ... Young of the two differ more noticeably ; those of R. percellens have more numerous but much smaller mid- dorsal thorns and ...
Pagina 384
... young are produced at all times of year in subtropical - tropical latitudes . the Young , born prematurely , as often happens when gravid females are caught , " moved around rather freely but had difficulty in staying right side up ...
... young are produced at all times of year in subtropical - tropical latitudes . the Young , born prematurely , as often happens when gravid females are caught , " moved around rather freely but had difficulty in staying right side up ...
Sommario
SAWFISHES GUITARFISHES SKATES and RAYS | 1 |
Suborder Myliobatoidea | 331 |
Dasyatis say | 378 |
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Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1953 |
Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1948 |
Parole e frasi comuni
Acad Amer axils of pectorals batoids Bigelow and Schroeder biol Brazil breadth Bull Carolina cartilage caudal fin center of cloaca Chesapeake Bay claspers Coast color comp concave Copeia Dasyatis Dermal denticles descr distance between inner dorsal fin embryos Evermann exposed nostrils eyes fathoms female Florida Fowler front of mouth front of orbits Garman genus gill openings Gulf Gulf of Maine Harv Hist inner ends Jersey Jordan Lacépède length of base Linnaeus listed lobe long as distance Lower surface mature males Müller and Henle Narcine nasal curtain pectoral fins pelvic fins Philad Poiss posterior margin prickles Proc Raja rearward Rio de Janeiro rostral rounded Sawfishes side Skates spiracles Study Material tail spine teeth thorns tip of snout tip of tail Torpedo transverse Trygon type species U. S. Bur U. S. Comm U. S. nat upper surface Woods Hole Zool