|
|
|
| Registros recuperados: 94 | |
|
|
| Torres, Gabriela; Charmantier, Guy; Wilcockson, David; Harzsch, Steffen; Giménez, Luis. |
| Developing physiological mechanistic models to predict species’ responses to climate‐driven environmental variables remains a key endeavor in ecology. Such approaches are challenging, because they require linking physiological processes with fitness and contraction or expansion in species’ distributions. We explore those links for coastal marine species, occurring in regions of freshwater influence (ROFIs) and exposed to changes in temperature and salinity. First, we evaluated the effect of temperature on hemolymph osmolality and on the expression of genes relevant for osmoregulation in larvae of the shore crab Carcinus maenas. We then discuss and develop a hypothetical model linking osmoregulation, fitness, and species expansion/contraction toward or away... |
| Tipo: Text |
Palavras-chave: Carcinus maenas; Climate change; Coastal zone; Larva; MRNA expression; Multiple stressors; Osmoregulation; Salinity; Temperature. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00692/80408/83516.pdf |
| |
|
| |
|
| |
|
|
| Barrionuevo,María José. |
| Se redescriben e ilustran todos los estados preimaginales de Rachiplusia nu (Guenée) de acuerdo a estándares actualizados de patrones descriptivos. Los estados inmaduros de R. nu fueron obtenidos a partir de crías de laboratorio, bajo condiciones controladas de 27 ± 2ºC de temperatura, 14:10 (luz/oscuridad) de fotoperíodo artificial y 70-75% de humedad relativa. Por primera vez, se describen todos los estadios larvales previos al de larva madura. Todos los estados inmaduros fueron comparados con aquellos de Pseudoplusia includens (Walker), con los que usualmente pueden ser confundidos a campo. La estimación de la edad larval permitió determinar que la mayor razón de crecimiento se verifica en el cuarto estadio larval y de allí decrece paulatinamente hacia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Huevo; Larva; Pupa; Morfología; Rachiplusia nu. |
| Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802011000200003 |
| |
|
| |
|
| |
|
| |
|
|
| Invernizzi,C; Rivas,F; Bettucci,L. |
| Chalkbrood disease affects the larvae of honeybees Apis mellifera L. and is caused by the fungus Ascosphaera apis. Infected larvae die when they are stretched in the cap cell and suffer a gradual hardening that ends in a very hard structure (mummie). Several studies have demonstrated that colonies that express an efficient hygienic behaviour (uncapping of cell and subsequent removal of dead brood) exhibit a higher resistance to the disease. However, it remains unclear whether the advantage of hygienic colonies over less hygienic ones lies in the ability to remove mummies or in the early detection of infected larvae and its cannibalization before they harden. To elucidate this aspect, the hygienic behaviour of 24 colonies, which were subsequently provided... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Honey bee; Ascosphaera apis; Larva; Selection. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100004 |
| |
|
|
| Santis,Marcelo Domingos de; Nihei,Silvio Shigueo. |
| ABSTRACT The tachinid genus Cholomyia presents Neotropical and Nearctic distribution with three species: C. acromion (Wiedemann, 1824), C. filipes (Walker, 1857), and C. inaequipes Bigot, 1884. In the present paper, all species are reviewed and redescribed, and a new species from Costa Rica is described, C. zumbadoi sp. nov. An identification key based on males is provided. For the first time, the male terminalia of all species, and the female terminalia and first instar larva of C. inaequipes are described and illustrated. Finally, based on the detailed morphological study we discuss the systematic placement of Cholomyia into Myiophasiini-Tachininae. A list of host–parasite records is synthesized. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larva; Myiophasiini; Redescription; Tachininae; Taxonomy. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000300217 |
| |
|
|
| Rebechi,Débora; Navarro-Silva,Mário Antônio. |
| Species of Chironomidae are widely used as bioindicators of water quality, since their larvae undergo morphological deformities when in contact with sediment contaminated with chemicals. In this work we endeavored to study the morphology of head structures (antennae, mandible, mentum, pecten epipharyngis, ventromental plate and premandible) throughout the development of the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981, which can be used in environmental impact analyses. Our results show that it is possible to differentiate among larval instars by doing a quantitative analysis on the number of striae on the ventromental plates. The six structures analyzed changed during larval ontogeny. These changes are part of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioindicator; Larva; Mosquito; Morphology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200009 |
| |
|
|
| Gatesoupe, Fj. |
| The proportion of vibrio E, dominant in healthy turbot larvae, was artificially increased in the rotifer enrichment medium. The maid effect of this vibrio enrichment was to improve the resistance of larval turbot challenged with a pathogenic strain of Vibrio splendidus, vibrio P. The improvement of the survival rates was significant with 1.5 x 10(6) CFU of vibrio E added per mi of enrichment medium, and it was still maximum at the hi hest dose tested (5 x 10(7) CFU.ml(-1); 80 +/- 2% of survivors after 48 h of challenge, versus 50 +/- 2 % for the control group). Further in vitro characterisation showed that vibrio E was able to grow in the presence of the chelating agents EDDHA and EDTA, while producing siderophore, as revealed by chrome azurol S dyeing.... |
| Tipo: Text |
Palavras-chave: Bacteria; Pathogenic Vibrio; Probiotic Vibrio; Experimental infection; Siderophore; Turbot; Larva. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00065/17671/15199.pdf |
| |
|
| |
|
|
| Sampaio,Luís André; Pissetti,Tito Luís; Morena,Mareska. |
| Este trabalho visou a determinar o efeito tóxico do nitrito sobre larvas do peixe-rei marinho Odontesthes argentinensis através de testes agudos com 96h de duração. As larvas utilizadas neste experimento foram cultivadas no Laboratório de Maricultura da FURG (Rio Grande - RS). Foi utilizada água do mar filtrada na salinidade 35, na temperatura de 23°C, com fotoperíodo de 14 horas de luz e aeração constante. Diariamente, as larvas mortas foram retiradas e, em seguida, 100% do meio experimental foi renovado. Não foi fornecido alimento durante a exposição ao nitrito. As larvas foram expostas a cinco concentrações de nitrito: 50, 150, 250, 350 e 450mg L-1 N-NO2-, mais um controle onde o nitrito não foi adicionado. A CL50-96h (concentração letal para 50% dos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Piscicultura; Odontesthes argentinensis; Ecotoxicidade; Nitrito; Larva. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000300048 |
| |
|
| |
| Registros recuperados: 94 | |
|
|
|
