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 143
... Skate among rocks or on ledges is an unusual event , though we have occas- ionally seen them there . Observations of Skates in aquaria 40 show that they are mostly inactive by day , lying quietly on bottom , often so much buried in sand ...
... Skate among rocks or on ledges is an unusual event , though we have occas- ionally seen them there . Observations of Skates in aquaria 40 show that they are mostly inactive by day , lying quietly on bottom , often so much buried in sand ...
Pagina 144
... Skates . Numerical Abundance . Skates may be extremely numerous locally on suitable bot- toms in temperate and boreal latitudes . In northern Europe , where they are valued for human food , their abundance is reflected in the ...
... Skates . Numerical Abundance . Skates may be extremely numerous locally on suitable bot- toms in temperate and boreal latitudes . In northern Europe , where they are valued for human food , their abundance is reflected in the ...
Pagina 145
... Skate for every 250- 300 fish of other kinds.48 Unfortunately , there are no statistics available as to the num- bers of Skates taken along our Middle Atlantic Coast southward from New Jersey or in their southern center of occurrence ...
... Skate for every 250- 300 fish of other kinds.48 Unfortunately , there are no statistics available as to the num- bers of Skates taken along our Middle Atlantic Coast southward from New Jersey or in their southern center of occurrence ...
Sommario
SAWFISHES GUITARFISHES SKATES and RAYS | 1 |
Suborder Myliobatoidea | 331 |
Dasyatis say | 378 |
10 sezioni non visualizzate
Altre edizioni - Visualizza tutto
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