Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Thomas B. Thorson"'
Autor:
Thomas B. Thorson
Publikováno v:
Fisheries. 7:2-10
The Lake Nicaragua Rio San Juan System harbors two classical examples of freshwater adaptation by elasmobranchs, the bull shark, Carcharhinus leucas, and the largetooth sawfish, Pristis perotteti. The bull shark is heavily concentrated around the riv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa4e3d21cf7c4d400dca234ab6340b0d
https://doi.org/10.1577/1548-8446(1982)007<0002:tioceo>2.0.co
https://doi.org/10.1577/1548-8446(1982)007<0002:tioceo>2.0.co
Publikováno v:
Environmental Biology of Fishes. 7:341-347
The Rio Bayano in eastern Panama is one of many tropical rivers in which bull sharks (Carcharhinus leucas) and largetooth sawfish (Pristis perotteti) have been known to occur. Since both species can osmoregulate in fresh water throughout life, theore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03102febaaac0791810695714af2715f
https://doi.org/10.1007/bf00005568
https://doi.org/10.1007/bf00005568
Publikováno v:
Environmental Biology of Fishes. 9:3-24
Observations of reproductive features and body measurements were made on wild-caught, freshwater stingrays, Potamotrygon circularis and P. motoro, from the Amazon drainage of western Brazil and southern Colombia. Further observations were made in Det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b7e80e4130c395f9ef7864ecedba1cd
https://doi.org/10.1007/bf00001055
https://doi.org/10.1007/bf00001055
Publikováno v:
Environmental Biology of Fishes. 23:299-314
The number of venomous caudal spines and their length and position relative to one another were determined in seven species of South American freshwater rays (Potamotrygonidae) and eight marine or euryhaline species of four families from the Caribbea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b641d082bff18d668dd7e910eb15f898
https://doi.org/10.1007/bf00005241
https://doi.org/10.1007/bf00005241
Autor:
Thomas B. Thorson
Publikováno v:
Environmental Biology of Fishes. 7:207-228
Of a total of 377 Pristis perotteti tagged in the Lake Nicaragua-Rio San Juan System, 214 (56.8% were recovered. Eighty were recovered at the original tagging site; four moved downstream the full length of the river; and 127 tagged at the source of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ee3ec44d6759ab8059d15620f8957a2
https://doi.org/10.1007/bf00002497
https://doi.org/10.1007/bf00002497
Publikováno v:
The Biological Bulletin. 154:508-516
1. Contrary to some reports, a rectal gland is present in strictly freshwater stingrays of South American rivers (Potamotrygon spp.). 2. The gland has the location and histological features of the salt-secreting rectal gland of marine elasmobranchs,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2161f4b70eb85743dceacf6da91f3e9b
https://doi.org/10.2307/1541076
https://doi.org/10.2307/1541076
Autor:
Thomas B. Thorson
Publikováno v:
Physiological Zoology. 31:16-23
than passing mention is the blood. Existing data on blood volume of poikilothermous vertebrates have been reviewed by Martin (1950) and Prosser and Weinstein (1950). Sturkie (1954) has summarized data on birds. The literature on the blood volume of m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5594084eaeacb65e1ff29c17b15efe31
https://doi.org/10.1086/physzool.31.1.30155374
https://doi.org/10.1086/physzool.31.1.30155374
Autor:
Arthur Svihla, Thomas B. Thorson
Publikováno v:
Ecology. 24:374-381
Even the most casual observer has noticed that the various species of amphibians do not frequent the same type of surrouindings. A student of ecology finds that practically every species of amphibian has a distinctive habitat, and that the habitats r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27c006288c7c0a824b9a7b9ea633905c
https://doi.org/10.2307/1930538
https://doi.org/10.2307/1930538
Autor:
Thomas B. Thorson
Publikováno v:
The Biological Bulletin. 120:238-254
1. The major body fluid compartments were measured in two species of fresh-water Chondrostei, two species of fresh-water Holostei, three species of fresh-water Teleostei and seven species of marine teleosts. These were compared with previous measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ad25aadc07293d5a907218ca9e75ab2
https://doi.org/10.2307/1539380
https://doi.org/10.2307/1539380
Autor:
Thomas B. Thorson
Publikováno v:
Physiological Zoology. 37:395-399
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb367bf41f0bab6ae24733758504a1a5
https://doi.org/10.1086/physzool.37.4.30152757
https://doi.org/10.1086/physzool.37.4.30152757