Study for reproductive mechanism of fur seal (Callorhinus ursinus) of Asian [Western Pacific Ocean and Sea of Okhotsk] origin

Study for reproductive mechanism of fur seal (Callorhinus ursinus) of Asian [Western Pacific Ocean and Sea of Okhotsk] origin

Using the data of the Robben Island fur seal (C. ursinus ) origin collecting in Western Pacific Ocean from November to June and also those in Sea of Okhotsk from June to October during 1959 to 1980, the author analyzed a trend of their reproductive condition, and observed their ovaries visually and...

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Veröffentlicht in:Bulletin - Far Seas Fisheries Research Laboratory (Japan) 1982-12 (20), p.1-36
1. Verfasser: Yoshida, K. (Far Seas Fisheires Research Lab., Shimizu, Shizuoka (Japan))
Format: Artikel
Sprache:eng
Schlagworte:
Callorhinus ursinus
FOCA
MAR DE OKHOTSK
Marine
MER D'OKHOTSK
NORTHWEST PACIFIC
PACIFICO NOROESTE
PACIFIQUE NORD-OUEST
PHOQUE
Pinnipedia
REPRODUCCION
REPRODUCTION
SEA OF OKHOTSK
SEALS
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Beschreibung
Zusammenfassung:Using the data of the Robben Island fur seal (C. ursinus ) origin collecting in Western Pacific Ocean from November to June and also those in Sea of Okhotsk from June to October during 1959 to 1980, the author analyzed a trend of their reproductive condition, and observed their ovaries visually and microscopically. The purpose of the present study is to analyze the correlation between changes of the resource and those reproductive mechanism and to reflect the result to the control of resources by finding out exactly the sexual cycle of an individual and analysing the reproductive condition from a new aspect.
ISSN:0386-7285