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| Sèbe, Maxime; Kontovas, Christos, A.; Pendleton, Linwood. |
| Ship strikes are one of the main human-induced threats to whale survival. A variety of measures have been used or proposed to reduce collisions and subsequent mortality of whales. These include operational measures, such as mandatory speed reduction, or technical ones, such as detection tools. There is, however, a lack of a systematic approach to assessing the various measures that can mitigate the risk of ship collisions with whales. In this paper, a holistic approach is proposed to evaluate mitigation measures based on a risk assessment framework that has been adopted by the International Maritime Organization (IMO), namely the Formal Safety Assessment (FSA). Formal Safety Assessment (FSA) is “a rational and systematic process for assessing the risk... |
| Tipo: Text |
Palavras-chave: Whale; Collision; Ship strikes; Risk assessment; Cost-effectiveness. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/69982/67892.pdf |
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| Muniz-Pereira,Luís C.; Vicente,Joaquim Julio; Noronha,Dely. |
| Three species of whale Balaenoptera borealis Lesson, 1828, B. physalus (Linnaeus, 1758) and Physeter catodon Linnaeus, 1758 captured in the Brazilian coast were necropsied for helminths. Balaenoptera borealis and B. physalus were infected by Crassicauda crassicauda (Nematoda, Tetrameridae) and Ogmogaster antarcticus (Digenea: Notocotylidae), which are referred for the first time in Brazil. Balaenoptera borealis was also infected by Lecithodesmus goliath (Digenea, Campulidae) and Bolbosoma turbinella (Acanthocephala, Polymorphidae). Physeter catodon was infected by Anisakis physeteris (Nematoda, Anisakidae), which is a new record to this host in Brazilian waters. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helminths; New records; Whale; Brazil. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600025 |
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| BHUIYAN, Mohammad Musharraf Uddin; SUZUKI, Yo; WATANABE, Hiroyuki; LEE, Eunsong; HIRAYAMA, Hiroki; MATSUOKA, Koji; FUJISE, Yoshihiro; ISHIKAWA, Hajime; OHSUMI, Seiji; FUKUI, Yutaka; 福井, 豊. |
| The objectives of this study were to choose an effective embryo reconstruction method and an effective post-activation agent for in vitro production of sei whale (Balaenoptera borealis) interspecies somatic cell nuclear transfer (iSCNT) embryos. Moreover, trichostatin A (TSA) treatment of whale iSCNT embryos was performed to improve the in vitro embryo development. In Experiment 1, the fusion rate was significantly higher (88.1%) in embryos reconstructed using the intracytoplasmic cell injection method (ICI) than that (48.7%) in the subzonal cell insertion (SUZI) counterpart. The rates of pseudopronucleus (PPN) formation (77.4 vs. 77.2%) and cleavage (24.5 vs. 37.0%) did not vary between ICI and SUZI. However, the PPN formation and cleavage rates were... |
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Palavras-chave: Interspecies; Somatic cell nuclear transfer; Whale. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2815 |
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| KITAYAMA, Chiyo; SASAKI, Motoki; ISHIKAWA, Hajime; MOGOE, Toshihiro; OHSUMI, Seiji; FUKUI, Yutaka; BUDIPITOJO, Teguh; KONDOH, Daisuke; KITAMURA, Nobuo; 佐々木, 基樹; 近藤, 大輔; 北村, 延夫. |
| The structure and functions of placentas were examined in 3 species of rorqual whales, common minke (Balaenoptera acutorostrata), Bryde’s (B. brydei) and sei (B. borealis) whales, with the aim of confirming the structural characteristics of the chorion, including the presence of the areolar part, and clarifying steroidogenic activities and fetomaternal interactions in the placentas of these whales. Placentas were collected from the second phase of the Japanese Whale Research Program under Special Permit in the North Pacific (JARPN II). Histological and ultrastructural examinations revealed that these whale placentas were epitheliochorial placentas with the interdigitation of chorionic villi lined by monolayer uninucleate cells (trophoblast cells) and... |
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Palavras-chave: Areola; Aromatase; Placenta; Uteroferrin; Whale. |
| Ano: 2015 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4178 |
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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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