Navegando por Assunto "Diet"

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Artigo
Coastal habitat degradation and green sea turtle diets in Southeastern Brazil
(2011-06) Santos, R. G.; Martins, A. S; Farias, J. N; Horta, P. A.; Pinheiro, H. T.; Torezani, E.; Baptistotte, C.; Seminoff, J. A.; Balazs, G. H.; Work, T. M.
To show the influence of coastal habitat degradation on the availability of food for green turtles (Chelonia mydas), we assessed the dietary preferences and macroalgae community at a feeding area in a highly urbanized region. The area showed low species richness and was classified as degraded. We examined stomach contents of 15 dead stranded turtles (CCL = 44.0 cm (SD 6.7 cm)). The diet was composed primarily of green algae Ulva spp. (83.6%). In contrast, the macroalgae community was dominated by the green alga Caulerpa mexicana. We found a selection for red algae, seagrass and Ulva spp., and avoidance for C. mexicana and brown alga Dictyopteris delicatula. The low diversity of available food items, possibly a result of environmental degradation, likely contributed to the low dietary diversity. The nutritional implications of this restricted diet are unclear.
Texto publicado em revista
Coastal Habitat Degradation and Green Sea Turtle Diets in Southeastern Brazil.
(Marine Pollution Bulletin, 2011-06) SANTOS, R. G; MARTINS, A. S; FARIAS, J. N; HORTA, P. A; PINHEIRO, H. T; TOREZANI, E; BAPTISTOTTE, C; SEMINOFF, J. A; BALAZS, G. H; WORK, T. M
To show the influence of coastal habitat degradation on the availability of food for green turtles (Chelonia mydas), we assessed the dietary preferences and macroalgae community at a feeding area in a highly urbanized region. The area showed low species richness and was classified as degraded. We examined stomach contents of 15 dead stranded turtles (CCL = 44.0 cm (SD 6.7 cm)). The diet was composed primarily of green algae Ulva spp. (83.6%). In contrast, the macroalgae community was dominated by the green alga Caulerpa mexicana. We found a selection for red algae, seagrass and Ulva spp., and avoidance for C. mexicana and brown alga Dictyopteris delicatula. The low diversity of available food items, possibly a result of environmental degradation, likely contributed to the low dietary diversity. The nutritional implications of this restricted diet are unclear.
Texto publicado em jornal
Isotopic paleoecology (δ13C) from mammals from IUIU/BA and paleoenvironmental reconstruction (δ13C, δ18O) for the Brazilian intertropical region through the late Pleistocene
(2020-08-15) Dantas, Mário André Trindade; Missagia, Rafaela Velloso; Dutra, Rodrigo Parisi; Raugust, Tiago; Silva, Leandro Antônio da; Delicio, Maria Paula; Renó, Rodolfo; Cherkinsky, Alexander
Stable isotopes of carbon and oxygen of fossil specimens are widely used for paleoecological and paleoenvironmental inferences, and there has been an effort to better understand the isotopic paleoecology and chronology of herbivores that inhabited the Brazilian Intertropical Region during the late Quaternary. In the present work, new radiocarbon datings and carbon and oxygen isotopes data for Eremotherium laurillardi, Notiomastodon platensis, Tapirus terrestris, Tayassu pecari, and Mazama gouazoubira are presented, from specimens that lived on Iuiu county (Toca Fria and Jatobá caves), state of Bahia, in the Brazilian Intertropical Region. E. laurillardi was dated as of ∼32 ka BP, representing the oldest direct dating for this species in the Brazilian Intertropical Region, while N. platensis was dated as of ∼25 ka BP. Fossils of the extant species T. pecari, M. gouazoubira, and T. terrestris presented radiocarbon ages of ∼23 ka BP, ∼21 ka BP, and ∼15 ka BP, respectively, showing that some of these species lived in Iuiu during the Last Glacial Maximum. According to our analyses, T. terrestris was the only specialist (δ13C = −11.0‰; piC3 = 0.76; BA = 0.49), whereas the remaining taxa were generalists mixed-feeders (δ13C = −1.3 to −10.0‰; piC3 = 0.24 to 0.69; BA > 0.58). The paleoenvironment reconstruction in Iuiu and other localities in BIR, during ∼32 ka BP to ∼15 ka BP, allow us to suggest that the dry arboreal to open Savanna habitats (rich in grass and shrubs) were the most common environment.
Artigo
Record of human spoliation by white-winged vampire bat Diaemus youngi (Jentink, 1893) (Chiroptera: Desmodontinae)
(2021-09-18) Augustinho Menezes da Silva, Luiz; Margarida da Silva, Rosângela; Lúcio dos Santos, Jailson; Lindemberg Martins Machado, José; Alexandre Barboza de Santana, Marcos; Lopes de Oliveira, Andrea; José da Silva, Eduardo; Carla Serafim da Silva, Juliana
Among the more than 1400 species of bats cataloged in the world, only three feed on blood (Hematophagy), these only occur in the Americas (mainly Latin) with wide distribution in Brazil. The feeding activity of vampire bats in humans was described only for Desmodus rotundus, however, in 2016 it was reported for Diphylla ecaudata. Thus, this report describes for the first time the use of human blood under fieldwork conditions by Diaemus youngi. The case occurred in the rural area of the municipality of Ipojuca (08º23'56"S and 35º03'50" W) in the Metropolitan Region of Recife, state of Pernambuco. A 44-year-old resident reported that at dawn on November 1, 2018, he woke up and noticed a bat bleeding his arm, which killed the animal. At dawn, he looked for a health center taking the bat, the patient was referred for appropriate prophylactic measures, receiving serum and vaccine while the bat was sent to LACEN/PE for diagnosis and rabies examination. The specimen was diagnosed based on its morphological characteristics (white spots on the wings, buccal glands, thumb pads, among others) as Deaemus youngi (male; adult). After analysis of direct immunofluorescence and Biological Proof, tested negative for rabies virus. This report highlights the need to deepen ecological studies on the species, mainly related to food items and behavior, as well as on the environmental impacts that may alter the selection of its prey.