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| Camphuysen, C.J.; Smeenk, C.; Addink, M.; Jansen, O.E.. |
| Between 1998 and 2007, 2063 cetaceans were found stranded in the Netherlands, representing at least 14 species. Two species, humpback whale (Megaptera novaeangliae) and Blainville’s beaked whale (Mesoplodon densirostris), are additions to the Dutch list. Apart from the first humpback whales, relatively many balaenopterid whales were found in comparison with previous decades. Range extension of recovering populations may explain part of this trend. However, the decline in strandings frequency in sperm whales (Physeter macrocephalus), another species with a slowly recovering Atlantic population but with a distinct peak in strandings in the 1990s, suggests that the factors underlying these changes are complex. During the 20th century, the strandings frequency... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cetaceans; Strandings; The Netherlands; North Sea; Wadden Sea; Fin whale; Sei whale; Minke whale; Humpback; 42.84. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/328649 |
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| FUJlHIRA, Takuma; KINOSHITA, Mikio; SASAKI, Motoki; OHNISHI, Masao; ISHIKAWA, Hajime; OHSUMI, Seiji; FUKUI, Yutaka; 木下, 幹朗; 佐々木, 基樹; 大西, 正男. |
| The present study was conducted to clarify the difference in the color of the cytoplasm in immature follicular oocytes from prepubertal and adult minke whales. The four lipid contents (triglyceride，total cholesterol phospholipids and non-esterified fatty acids) in vitrified immature oocytes from prepubertal and adult minke whales，and also in fresh and vitrified immature porcine oocytes，were measured. The lipid contents in vitrified-warmed minke whale oocytes were similarly high compared with those in vitrified-warmedp orcine oocytes. In particular，the total cholesterol and phospholipid contents in the vitrified immature oocytes from prepubertal and adult minke whales were significantly( P<0.05) higher than those from prepubertal pigs. Furthermore，the... |
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Palavras-chave: Minke whale; Porcine; Oocytes; Lipid; Sexual maturity. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2731 |
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| Andriolo,Artur; Rocha,Jesuina M. da; Zerbini,Alexandre N.; Simões-Lopes,Paulo C.; Moreno,Ignacio B.; Lucena,Alineide; Danilewicz,Daniel; Bassoi,Manuela. |
| Ship-based sighting surveys for cetaceans were conducted in the former whaling ground off the northeastern coast of Brazil. The cruises took place in winter and spring of 1998-2001 with the objectives of investigating current distribution and abundance of cetaceans, particularly large whale species taken during whaling. In 1998 the survey were conducted between the parallels 5°30'W and 9°S and the 200 m isobath and the meridian 033°W. A total of about 3,100 nm were surveyed between 1998 and 2001 Surveys were conducted using line transect methods from about 5-10°S, and from the coast to 33°W. A total of 151 sightings (203 individuals) of large whales were recorded on effort. The Antarctic minke whale - Balaenoptera bonaerensis (Burmeister, 1867) was the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bryde's whale; Minke whale; Sei whale; Sperm whale; South Atlantic. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500011 |
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| TETSUKA, Masafumi; ASADA, Masatsugu; MOGOE, Toshihiro; FUKUI, Yutaka; ISHIKAWA, Hajime; OHSUMI, Seiji; 手塚, 雅文; 福井, 豊. |
| This study describes the morphological and morphometrical changes associated with prepubertal ovarian development in the Antarctic minke whale (Balaenoptera bonaerensis). Ovaries were harvested from 94 immature minke whales caught in the Antarctic Ocean during the summer feeding season (December-March). Notable differences in ovarian size and morphology were found among animals. Up to 10 folds difference in ovarian weight was found among prepubertal whales of similar body size. During the prepubertal period, ovaries grew slowly and approximately doubled their weight. The morphologies of right and left ovaries were almost identical while the growth of the ovary appears to occur preferentially on the right side. The most striking morphological feature was... |
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Palavras-chave: Whale; Minke whale; Ovarian development. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3034 |
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