The New World cichlids Petenia splendida and Caquetaia spp. possess extraordinarily protrusible jaws. We investigated the feeding behavior of extreme (here defined as greater than 30% head length) and modest jaw-protruding Neotropical cichlids by comparing feeding kinematics, cranial morphology, and feeding performance. Digital high-speed video (500 fps) of P. splendida, C. spectabile, and Astr...

Rising levels of anthropogenic carbon dioxide in the atmosphere are acidifying the oceans and producing diverse and important effects on marine ecosystems, including the production of fatty acids (FAs) by primary producers and their transfer through food webs. FAs, particularly essential FAs, are necessary for normal structure and function in animals and influence composition and trophic struct...

Resumen: La composición química del músculo de la corvina roja, Sciaenops ocellatus. cultivado en jaulas flotantes es comparable a la obtenida en cultivos de estanques de tierra o en el medio marino. La edad o el peso no fueron un factor detenninante de la composición química del músculo. Un alimento flotante del 36 % de proteína es adecuado para mantener un relativo buen crecimiento COlporal, ...

Astronotus ocellatus, popularly known as Oscar, is a cichlid fish from the Amazon basin (Brazil) with a great potential for fish farming. The aim of this research is to describe the morphology of eggs and larvae of A. ocellatus under stereomicroscopy and scanning electron microscopy. Eggs from natural spawnings were taken to hatcheries, collected at previously established time periods and then ...

Studies on predat~on are often based solely on the measurement of predator consumption rates, providing little information on underlying behavioral mechan~sms. In this study, behav~oral observations were used In conjunchon with consumption rate analyses to investigate the predatory interactions between 2 brachyuran crabs, Ovalipes ocellatus and Calllnectes sapidus, and juvenile hard clams Aderc...

The genes encoding the beta-subunits of ATP-synthases (ATPases) from Bacteroides fragilis DSM 2151, Cytophaga lytica DSM 2039 and 'Taxeobacter ocellatus' were cloned. The nucleotide sequences were determined completely for the genes of the first two organisms and to a major part for that of 'T. ocellatus'. The predicted amino acid sequences were compared with previously published amino acid seq...

Male and female Chalcides ocellatus were gonadectomized and cold acclimated at 15 degrees for 1 week. Lizards were injected with testosterone and estradiol, and their oxygen consumption was determined at 15 degrees. Testosterone and estradiol caused a significant increase in the whole body rate of oxygen consumption in male and female lizards, respectively.