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| Registros recuperados: 75 | |
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| Pérez-Cao, H.. |
| Entre los años 2000 - 2003 se evaluó la abundancia y distribución de delfines toninas en áreas del Archipiélago Sabana-Camagüey, específicamente en zonas adyacentes a Cayo Coco y en la zona norte de Matanzas. Se realizaron 12 salidas de campo, seis en cada área, recorriéndose un total de 2 007,8 millas náuticas, para un total de 322 h 79 min. Durante estas salidas se registraron cada 30 minutos variables oceanográficas a lo largo de transectos lineales y utilizando la técnica de fotoidentificación se cuantificaron los avistamientos de delfines, registrando el número de individuos, tamaño de grupo, la conducta y número de crías. Para el análisis se hizo una diferenciación por subzonas (5 subzonas), estaciones (lluvia y seca), y horario del día (mañana y... |
| Tipo: Theses and Dissertations |
Palavras-chave: Abundance; Distribution; Marine mammals. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/4603 |
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| Whittington, P.A.; Underhill, L.G.; Esmonde-White, D.A.; Wilkinson, C.P.. |
| The African Penguin is rare east of Algoa Bay, Eastern Cape, South Africa. Ninety-nine penguins were found onshore along the coast of KwaZulu-Natal in 1981–1999, mostly in a state of starvation. Of these, 77% were between June and October during, and immediately after, the ‘sardine run’ of Sardine Sardinops sagax; 95% of birds that were aged were first-year birds; 96% were in the southern half of KwaZulu-Natal, south of Mtunzini (29°S) where the sardine run is strongest. The observations suggest that juvenile penguins from the nearest breeding colonies, in Algoa Bay, are drawn eastwards by the migrating Sardines; when these shoals dissipate, a lack of food leads to them coming ashore. |
| Tipo: Journal Contribution |
Palavras-chave: Marine mammals. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/425 |
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| Edwards, E.F.; Donahue, M.. |
| A review of currently available literature conceming interactions between tuna purse-seines and dolphins outside the eastern tropical Pacific Ocean (ETP) does not indicate any large, sustained, or widespread practice of setting purse seine nets around cetaceans for the purpose of catching tuna in any oceanic area other than in the ETP. While a number of individual reports exist of purse-seine sets made on cetaceans during the process of fishing for tuna in areas other than the ETP, there is no quantitative or even anecdotal indication that large-scale sustained directed fishing on cetaceans during tuna purse-seining occurs anywhere other than in the ETP. However, this lack of information should not be mistaken for conclusive evidence that such large-scale... |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Marine mammals. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/908 |
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| Lassalle, Geraldine; Gascuel, Didier; Le Loch, Francois; Lobry, Jeremy; Pierce, Graham John; Ridoux, Vincent; Santos, Maria Begona; Spitz, Jerome; Niquil, Nathalie. |
| A number of marine mammal populations is currently threatened by their interactions with fisheries. The present study aimed to provide insights into the severity of potential impacts of operational and biological interactions between top predators and fisheries, in the Bay of Biscay region. Our approach was to modify an Ecopath with Ecosim (EwE) model describing the overall structure and function of the ecosystem by including landings and discards of exploited stocks and estimations of the bycatch of non-target compartments. Second, a set of ecological indices and a trophic level (TL)-based model (EcoTroph, ET) were derived from the EwE model. ET was used to simulate the effects of increasing fishing pressure on the ecosystem and, more particularly, on top... |
| Tipo: Text |
Palavras-chave: Ecopath; Ecosystem modelling; EcoTroph; Fisheries impacts; Marine mammals; Trophic level. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00087/19855/17541.pdf |
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| Morizur, Yvon; Gaudou, Olivier; Demaneche, Sebastien. |
| During the years 2008 to 2013 several observations of catches were planned on board of set netters fishing in the bay of Biscay, in the English Channel, in the North sea and in the Mediterranean area (around Corsica). All the observations were done on nets without pingers and they were pooled to provide an average bycatch rate of marine mammals by fleet. Estimates of annual bycatch by using the fishing efforts of the year 2012 were provided by fleet. Harbour porpoise Phocoena phocoena was the most common bycatch in set nets. An average annual estimate of 600 harbour porpoises was obtained for the French fleet; other species recorded in set nets were mainly common dolphin Delphinus delphis, striped dolphin Stenella coeruleoalba and the two species of seals... |
| Tipo: Text |
Palavras-chave: France; Bycatch; Marine mammals; Phocoena phocoena; Set nets; Trammel nets; Gill nets; EU regulation 812/2004. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00209/32016/30451.pdf |
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| Lurton, Xavier; Antoine, Loic. |
| The use of acoustical systems in various human activities in the ocean (industry, defence, science) raises the issue of their impact upon marine mammals populations. Several serious accidents linked to the use of naval sonars led the military, industrial and scientific communities to investigate the potential dangers of their own activity. This report aims at identifying the risks for the cetaceans linked to the use of acoustic and seismic systems currently used for oceanographic science. The analysis proposed here stays within the frame of bibliography synthesis and elementary modelling, and brings no new scientific elements on the topic. An overview of the status of cetacean populations is given first, with a summary of the possible acoustical... |
| Tipo: Text |
Palavras-chave: Seismics; Sonar; Acoustics; Oceanography; Acoustical methods; Auditory threshold; Stranding; Acoustical risks; Marine mammals. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/rapport-2390.pdf |
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| Lahaye, V; Bustamante, Paco; Law, J.r; Learmonth, J.a; Santos, M.b.; Boon, J.p.; Rogan, E; Dabin, W; Addink, M.j.; Lopez, A; Zuur, A.f.; Pierce, G.j.; Caurant, Florence. |
| Selected trace elements (Cd, Cu, Hg, Se, Zn) were measured in the kidneys and the liver of 104 harbour porpoises (Phocoena phocoena) stranded along the coasts of France, Galicia (Spain), Ireland, Scotland (UK), and the Netherlands. Generally, relatively low concentrations of toxic elements were encountered in the tissues of European porpoises, except for two individuals, which displayed high hepatic Hg concentrations. Also, elevated Cd levels obtained in Scottish porpoises could be related to their feeding preferences and this result suggests an increase of the proportion of cephalopods in their diet with latitude. Moreover, significant geographical differences were seen in hepatic Zn concentrations; the elevated Zn concentrations displayed by porpoises... |
| Tipo: Text |
Palavras-chave: Tracers; Multivariate analysis; Diet; Age; Marine mammals; Zinc; Cadmium; Mercury; Heavy metals. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2920.pdf |
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| Chamizo, E.; Medell, M.; Cruz, D.; Odelsa, A.; Rodríguez, S.; Barrera, M.. |
| Entre las enfermedades virales de más reciente diagnóstico que afectan los delfines nariz de botella (Tursiops truncatus) se describe la papilomatosis, una entidad tumoral generalmente benigna que afecta piel y mucosas de diferentes zonas del cuerpo, tanto de animales acuáticos como terrestres incluido el hombre. Con el objetivo describir el cuadro anatomopatológico de lesiones papilomatosas en genitales externos de delfines nariz de botella (Tursiops truncatus) se realizaron biopsias de lesiones genitales de 17 delfines entre los años 2005 – 2010, previa anestesia del área con lidocaína al 2 %, mediante un ponche de 5mm realizado sobre la lesión tumoral. Se realizó la descripción clínica, histopatológica y ultramicroscopica de las lesiones. La descripción... |
| Tipo: Journal Contribution |
Palavras-chave: Marine mammals. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4186 |
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| Notarbartolo di Sciara, G.. |
| Twenty one species of cetaceans occur in various degrees of abundance in the Mediterranean Sea and in the Black Sea. This list corresponds to Annex 1 of the Agreement, with the addition of three species known to have occurred in the Mediterranean in subsequent times. The list also roughly corresponds to the species occurring in the Contiguous Atlantic Area, however we must caution that a considerable number of other species, commonly present throughout the Atlantic Ocean, may occur there. Furthermore, we note that the number of species which are known to occur in the Agreement area is likely to grow with time, as the attention of scientists and laypersons towards cetaceans increases, and considering that species hitherto unreported from the region may... |
| Tipo: Report |
Palavras-chave: Marine mammals. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/840 |
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| Parsons, E.C.M.; Jenner, K.C.S.; Baldwin, R.; Rudolph, P.; de Boer, M.N.; Eyre, E.L.; Simmonds, M.P.; Keith, S.G.; Rosenbaum, H.C.; Peddemors, V.M.; McCabe, K.A.; Burton, C.L.K.; Jenner, M.N.M.. |
| This paper presents a synthesis of mainly published information relating to the cetaceans of the Indian Ocean Sanctuary (IOS). It highlights a number of new studies and other initiatives linked to the Sanctuary and reviews the current understanding of the biology of the Sanctuary’s cetaceans. Cetaceans in the IOS are exposed to a range of threats, including by-catch and the effects of climate change. Whilst no quantification can be made of these threats at this time, they may still be significant for the conservation of populations. The role of the IOS in stimulating research to further establish the status of cetacean populations is acknowledged. |
| Tipo: Book |
Palavras-chave: Marine mammals. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/680 |
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| Batista,Renata Lúcia Guedes; Schiavetti,Alexandre; Santos,Urânia Amaral dos; Reis,Maria do Socorro Santos dos. |
| Stranded cetaceans have scientific value and may confirm the occurrence of some species or indicate their geographical distribution in an area. The collection of biological material can also contribute to improve the knowledge of the species or populations inhabiting certain areas. This study aimed to record live or dead cetaceans found ashore along the coast of Ilhéus, Bahia State, northeastern Brazil. Data were collected through a campaign called "SOS strandings, whales, porpoises and dolphins." Between 1997 and 1999 three hundred posters and five hundred folders were distributed to beach huts, shops, fishing associations and settlements, the city's municipal government, the Brazilian Environmental Agency (IBAMA) and fire stations. During this campaign,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Occurrence; Strandings; Marine mammals; Educational campaigns. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100003 |
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| Registros recuperados: 75 | |
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