|
|
|
|
|
| THATCHER,Vernon E.. |
| Anphira branchialisgen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) is described from the dorsal areas of the gill chambers of three species of piranhas (Serrasalmusspp.). The fishes were caught in rivers near Manaus, Amazonas State and on Maracá island, Federal Territory of Roraima, Brasil. The new genus and species is characterized by having large, flat coxal plates on ail 7 pereonites. These plates usually extend beyond the margins of the following segments and the 7th ones extend nearly to the pleotelson and cover the lateral margins of the pleonites. The mandible of this species is rounded, "foot shaped" and without incisor. The mandibular palp is short and stout. The maxillules have 3 terminal and 2 subterminal spines. The pleopods are simple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isopod; Cymothoid; Parasite; Piranha; Amazon. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300297 |
| |
|
| |
|
|
| Trindade,Márcia Emília de Jesus; Jucá-Chagas,Ricardo. |
| Serrasalmus brandtii and Pygocentrus piraya are two common piranha species in the Barragem da Pedra Reservoir, rio de Contas. In order to identify the diet composition of the two species, monthly collections were performed at three sites between May 2001 and April 2003, using two gill nets of different mesh sizes cast at the beginning of the day and visited after 6, 12 and 24 h. The qualitative composition of the diet was analyzed by determining the frequency of occurrence. Comparison of the two species showed a higher relative abundance of S. brandtii (151) compared to P. piraya (55). The food items most frequently found in the stomachs of the two species were fins, fish and shrimp. Serrasalmus brandtii showed a greater feeding plasticity than P. piraya. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical; Feeding; Piranha; Reservoir. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400013 |
| |
|
| |
|
|
| Vital,José Francalino; Varella,Angela Maria Bezerra; Porto,Daniel Brito; Malta,José Celso de Oliveira. |
| Foi estudada a fauna de metazoários parasitos de Pygocentrus nattereri capturadas no lago Piranha, durante as fases do ciclo hidrológico do ano de 2007. Foi verificada a relação entre o fator de condição e a ocorrência de parasitos, e também a viabilidade da utilização da fauna parasitária de P. nattereri como bioindicadora da saúde do ambiente. Foram coletados monogenóideos das espécies Amphithecium microphalum, Amphitecium brachycirrum, Amphitecium calycinum, Amphithecium catalaoensis, Amphithecium junki, Pithanothecium amazonensis e Rhinoxenus piranhus, o nematóide Procamallanus inopinatus, copépodos da espécie Miracetyma sp. e o isópoda Anphira branchialis. Não houve correlação significativa entre a ocorrência dos parasitos com o fator de condição dos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasitismo; Piranha; Amazônia; Monitoramento ambiental; Parasitos de peixes. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100021 |
| |
|
|
| Agostinho, Carlos Sérgio; UFT; Marques, Elineide Eugenio; Universidade do Tocantins. |
| The frequency of attacks by piranhas on specimens of netted fish was analyzed from monthly catches in gill nets set out for 24 hours and checked every 8 hours, from June 1987 through May 1988, in lakes, channels, and rivers of the upper Paraná river floodplain, Brazil. Captured fish were identified and marks of attack by piranhas on their fins and flesh were recorded. The probability of detection of netted fishes, their body structure, and behavioral aspects were the factors determining the selective piranhas attacks. There was no significant relationship between the frequency of predator attacks and the relative abundance of the prey. Community composition was the main factor determining the attack frequency, which differed according to environment |
|
Palavras-chave: 2.00.00.00-6 Ciências Biológicas Serrasalmus spilopleura; Serrasalmus marginatus; Serrasalmidae; Piranha; Seleção de presa; Predação 2.00.00.00-6 Ciências Biológicas. |
| Ano: 2001 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2700 |
| |
|
| |
|
|
| THATCHER,Vernon E.. |
| Studies of the cymothoid isopod Livoneca symmetricaVan Name, 1925, showed that this species has characters that preclude its inclusion in LivonecaLeach, 1818, or in any other known genus. The species is redescribed on the basis of male and female specimens from the mouth cavities of Amazonian piranhas (Serrasalmus spilopleura(Kner) and S. elongatusKner) and Vanameagen. nov. is proposed for it. The new genus is defined as having: a cephalon that is not immersed in pereonite 1; mandibles that are "foot-shaped" and without incisors, pereopods that are long and unequal in size and shape; a pleon that is not immersed in the pereon; and a pleotelson that is inflated anteriorly and medially. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isopod; Cymothoid; Parasite; Piranha; Amazon. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300287 |
| |
|
|
|
