Validation of an indirect ELISA using recombinant proteins as antigen to identify animals exposed to Babesia bigemina.
- Rebeca M Santamaria, J. Lira, P. Vargas, J. A. Álvarez, C. Rojas, J. V. Figueroa
- Medicine, BiologyTransboundary and emerging diseases
- 25 March 2020
The instrumented iELISA with rRAP-1α as antigen shows an excellent specificity rate and an acceptable sensitivity that allows for the detection of antibodies to B. bigemina in cattle naturally exposed to the vector tick Rhipicephalus microplus.
Condition factor and carapace width versus wet weight relationship in the swimming crab Callinectes danae Smith 1869 (Decapoda: Portunidae) at the Santa Cruz Channel, Pernambuco State, Brazil
The condition factor oscillated throughout the sampling year, for both sexes, which was related to the reproductive cycle, and was significantly higher in females (p < 0.05), due to the fact that female gonads are heavier than that of males.
Molecular detection of Anaplasma marginale in stable flies Stomoxys calcitrans (Diptera: Muscidae) feeding on a tick-free bovine herd
- C. R. B. Garfias, T. Rodríguez, C. Rojas, J. Lira, J. A. Álvarez, Diego Polanco
- 26 January 2018
The obtained results suggest that A. marginale transmission is carried out mechanically by S. calcitrans , favouring the circulation and maintenance of the microorganism in this particular bovine herd.
Comparative biology of the crab Goniopsis cruentata: geographic variation of body size, sexual maturity, and allometric growth
- J. Lira, T. C. Calado, C. F. Rezende, José R F Silva
- Environmental Science, GeographyHelgoland Marine Research
- 22 August 2015
Findings provide further evidence that local environmental conditions play a role in phenotypic variation between populations inhabiting different latitudes and show that variation in size at maturity and body size can lead to divergent allometric patterns of sexual characteristics that can have a sex-specific response.
Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil
The condition factor of female was higher than that of male crabs, probably due to the gonad weight of females, and varied seasonally for both sexes, being higher in the autumn and winter in males, and in the Autumn and spring in females.
Testing for a whole-organism trade-off between natural and sexual selection: are the male guppies preferred by females more likely to be eaten by predators?
The whole-organism, performance-based trade-off between natural and sexual selection in the Trinidadian guppy is absent, very weak, or context-dependent, making it difficult to detect in experiments.
Reproductive aspects and adaptive relative growth of the tropical crab Goniopsis cruentata
There appears to be no pattern of sexual maturity between the sexes in this species, with both sexes maturing earlier or later, and the relative growth of the gonopod length and abdomen width and length is clearly related to different sex roles.
A Comparative Genomic Study of Attenuated and Virulent Strains of Babesia bigemina
A Babesia bigemina strain that has been maintained under a microaerophilic stationary phase in in vitro culture conditions for several years in the laboratory lost virulence for the bovine host and the capacity for being transmitted by the tick vector.
Population biology of the crab Goniopsis cruentata: variation in body size, sexual maturity, and population density
- J. Lira, José R F Silva, C. F. Rezende, R. Martins, T. O. Ferreira, Leonardo Peres de Souza
- Environmental Science
The finding indicate that key life history traits and population characteristics can vary on a very small spatial scale which may help to further elucidate the biology of natural populations.
BREEDING PERIOD OF THE CRAB GONIOPSIS CRUENTATA (LATREILLE 1803) (CRUSTACEA: BRACHYURA: GRAPSIDAE) IN NA ESTUARINE AREA, MACEI ´ O, ALAGOAS, BRAZIL.
Reproduction is certainly the main mechanism by which to guarantee species continuity, being a result of adaptative processes determined by evolutionary pressures to improve offspring survival…