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| Registros recuperados: 12 | |
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| Morizur, Yvon; Antoine, Loic. |
| The exploitation of the living marine resources should take into account the effects on marine ecosystems. It consequently includes direct and indirect impacts of fishing activities on marine communities of non-market value for the fishing industry. Protecting the marine species victims of by-catch such as sea mammals is essential as it could be a serious threat for endangered species -See COM (1999) 363 final. The entire group of cetaceans are among the protected species listed by CITES against over-exploitation through international trade. Similarly, several international agreements on cetaceans conservation have been signed, including the Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas (ASCOBANS), the ACCOBAMS agreement for... |
| Tipo: Text |
Palavras-chave: Catche; Cetacean; Marine ecosystem; Fishing; Mammal; Marine living resources. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-1552.pdf |
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| Viblanc, Vincent A.; Schull, Quentin; Roth, Jeffrey D.; Rabdeau, Juliette; Saraux, Claire; Uhlrich, Pierre; Criscuolo, François; Dobson, F. Stephen. |
| 1.Oxidative stress has been proposed as a central causal mechanism underlying the life history trade-off between current and future reproduction and survival in wild animals. 2.Whereas mixed evidence suggests that maternal oxidative stress may act both as a constraint and a cost to reproduction, some studies have reported a lack of association between reproduction and maternal oxidative stress. 3.The oxidative shielding hypothesis offers an alternative explanation, suggesting that mothers may pre-emptively mitigate the oxidative costs of reproduction by increasing antioxidant defences prior to reproduction. 4.We tested the oxidative constraint, cost, and shielding hypotheses using a longitudinal field study of oxidative stress levels in a species that... |
| Tipo: Text |
Palavras-chave: Antioxidant; Body condition; Cost of reproduction; Life history; Mammal; Mitochondria; Trade-off. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00415/52679/53542.pdf |
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| MAY JÚNIOR,JOARES A.; QUIGLEY,HOWARD; HOOGESTEIJN,RAFAEL; TORTATO,FERNANDO R.; DEVLIN,ALLISON; CARVALHO JÚNIOR,RUI M. DE; MORATO,RONALDO G.; SARTORELLO,LEONARDO R.; RAMPIM,LILIAN E.; HABERFELD,MARIO; PAULA,ROGÉRIO C. DE; ZOCCHE,JAIRO JOSÉ. |
| ABSTRACT The Pantanal is the largest inland wetland in the world and is under increasing anthropogenic threats, including long-term regionally intensive gold mining practices. Gold mining activities are known to cause the release of harmful pollutants such as mercury (Hg) to the surrounding environment. Jaguars (Panthera onca (Linnaeus, 1758)) are apex predators, and therefore show great potential to accumulate Hg by biomagnification. We hypothesize that total Hg content in the fur of jaguars from two sites within the Brazilian Pantanal would be significantly different as a function of distance from active gold mining operations. The Hg content was determined by fluorescence spectrometry. The mean ± SD Hg content in jaguars from the study site influenced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomagnification; Heavy metals; Mammal; Wetland. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502129 |
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| Voss,Robert S.; Fleck,David W.; Jansa,Sharon A.. |
| Gracilinanus emiliae is a species of gracile mouse opossum that is currently known from fewer than a dozen specimens. The material we examined exhibits a distinctive suite of external and craniodental characters that are unlike those of any other congeneric species. We review all published records for G. emiliae, several of which are based on misidentifications or lost material, and we report a new specimen from northeastern Peru, the first to be recorded from that country, and the first to be unequivocally associated with primary lowland rain forest. The available distributional data suggest that G. emiliae (or a complex of cryptic taxa with the same morphological characters) is very widely distributed in Amazonia and perhaps also in Venezuelan coastal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Mammal; Marsupial; Neotropical; Rainforest. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000200015 |
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| Ribeiro, Gláucia Marques Freitas; UFV; Fonseca, Cláudio César; Universidade Federal de Viçosa; Rodrigues, Sirlene Souza; Universidade Federal de Viçosa; Matta, Sérgio Luis Pinto da; Universidade Federal de Viçosa; Neves, Clovis Andrade; Universidade Federal de Viçosa. |
| The objective of this study was to quantify argyrophillic, argentaffin and insulin immunoreactive endocrine cells in the different segments of the small intestine of Didelphis aurita and measure probable differences in the number of these cells between adult and post-pubertal animals. Biological material consisted of ten male and female opossums specimen, divided in two groups according to weigh. The utilized staining techniques were Grimelius, modified Masson-Fontana and direct immunoperoxidase. Results indicated a predominance of argyrophillic cells in the small intestine of opossums from class 1 and 2, with an average of 52.58 and 56.15 cells mm-2, respectively; of which, the average number of total endocrine cells, argyrophillic and argentaffin cells... |
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Palavras-chave: 2.00.00.00-6; 2.06.01.00-0 digestive tract; Endocrine cells; Immunoreactive cells; Mammal; Marsupial Citologia e Biologia Celular digestive tract; Endocrine cells; Immunoreactive cells; Mammal; Marsupial. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8644 |
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| Descombes, Patrice; Leprieur, Fabien; Albouy, Camille; Heine, Christian; Pellissier, Loic. |
| Aim In interaction with past climate changes, it is likely that plate tectonics contributed to the shaping of current global species diversity, but so far this has not been statistically quantified at the global level. Here, we tested whether plate tectonics since the breakup of Gondwana left an imprint on current patterns of species richness of amphibians, birds and mammals. Location Global. Methods We reconstructed the absolute positions of continental plates since the Early Cretaceous and used this information to derive variables of latitudinal shifts and potential exchanges among landmasses that could have modulated species richness. Using a multi-model inference approach combining both contemporary and historical variables, we quantified the... |
| Tipo: Text |
Palavras-chave: Amphibian; Bird; Continental drift; Diversity; Indo-Pacific; Madagascar; Mammal; Plate tectonics; Southeast Asia; Wallace line. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00373/48413/48711.pdf |
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| González,Publio; Sawyer,Yadéeh E.; Avila,Mario; Armién,Aníbal G.; Armién,Blas; Cook,Joseph A.. |
| The identity of two insular populations of rodents of the nominal species, Zygodontomys brevicauda (Allen & Chapman, 1893), from the Veragua Archipelago was examined. The mitochondrial cytochrome-b gene was sequenced from specimens collected on Isla Coiba (n = 10), Isla Cébaco (n = 3) and on the nearby Peninsula Azuero (n = 3) in Panama and compared with sequences of Z. brevicauda and a number of other related species from GenBank. For Panama, phylogenetic analyses identified two clades within Zygodontomys Allen, 1897; one representing Isla Coiba and another clade composed of rats from Isla Cébaco and from the mainland on the Peninsula Azuero, as well as a GenBank sequence of Z. brevicauda from Venezuela. We suggest that the population from Isla... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cébaco; Island; Mammal; Panamá. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400014 |
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| Yanagawa, Hisashi; Akisawa, Masae. |
| Road kills of medium- and small-sized mammals, reptiles and amphibians were surveyed in eastern Hokkaido, northern Japan. Four hundreds and fifty-five carcasses of medium- and small-sized mammals, 17 carcasses of reptiles and 1051 carcasses of amphibians were collected from April 1996 to March 1998. In mammals, the species with the highest number of casualties due to traffic accidents was the Big-clawed Shrew with a total of 152 killed, followed by Red Squirrel (94) and Red Fox (85). Road kills of reptiles were low, with only 17 mortalities of four species. In amphibians, a great majority of the mortalities were Ezo Brown Frogs with 1,044 casualties. |
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Palavras-chave: Road kill; Mammal; Reptile; Amphibian; Japan; 交通事故; 哺乳類; 爬虫類; 両生類; 日本. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/89 |
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| Registros recuperados: 12 | |
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