scholarly journals Feeding of two sympatric species of Characidium, C. lanei and C. pterostictum (Characidiinae) in a coastal stream of Atlantic Forest (Southern Brazil)

2000 ◽  
Vol 43 (5) ◽  
pp. 527-531 ◽  
Author(s):  
José Marcelo R. Aranha ◽  
José Henrique C. Gomes ◽  
Fábio N. O. Fogaça
Keyword(s):  
Atlantic Forest ◽  
Feeding Strategy ◽  
Stomach Contents ◽  
Sympatric Species ◽  
Southern Brazil ◽  
Food Items ◽  
Chironomidae Larvae ◽  
Electric Fishing

The feeding strategy of Characidium lanei and C. pterostictum was studied in the "Cabral" stream, a coastal stream of the Atlantic Forest, in southern Brazil. The samples were taken using electric fishing between March/95 and February/96. We studied about 15 stomach contents for each species in each season of the year. The stomach contents of the studied species were composed of 39 different food items, 28 in C. lanei and 24 in C. pterostictum. Chironomidae larvae and Ephemeroptera nymph were the most important items for C. lanei, except in the summer when Acarina and not identified Arthropoda were the most important items. Chironomidae and Simulidae larvae were the most important items in C. pterostictum. These results indicated an insectivorous habits and opportunist feeding strategy to C. lanei and C. pterostictum with several items rare or not very frequent.

scholarly journals Frugivory by the black-eared opossum Didelphis aurita in the Atlantic Forest of southern Brazil: Roles of sex, season and sympatric species

Biotemas ◽  
2011 ◽  
Vol 22 (3) ◽  
Author(s):  
Nilton C. Cáceres ◽  
Lucineia Z. Prates ◽  
Ivo R. Ghizoni-Junior ◽  
Maurício E. Graipel
Keyword(s):  
Atlantic Forest ◽  
Sympatric Species ◽  
Southern Brazil ◽  
Didelphis Aurita

scholarly journals Effect of habitat heterogeneity in the composition and distribution of Chironomidae (Diptera) assemblage in different microhabitats of preserved streams in the Brazilian Atlantic Forest

2014 ◽  
Vol 26 (2) ◽  
pp. 163-175 ◽  
Author(s):  
Fernanda de Almeida Gurski ◽  
Gisele Daiane Pinha ◽  
Yara Moretto ◽  
Alice Michiyo Takeda ◽  
Norma Catarina Bueno
Keyword(s):  
Atlantic Forest ◽  
Habitat Heterogeneity ◽  
Brazilian Atlantic Forest ◽  
Southern Brazil ◽  
Composition And Structure ◽  
Chironomidae Larvae ◽  
Faunistic Composition ◽  
Surber Sampler ◽  
Biological Differences

AIM: This study aimed at to evaluate the influence of habitat heterogeneity on the attributes of richness, abundance, diversity and equitability of Chironomidae assemblage and also the biological differences in faunistic composition related to each microhabitat. METHODS: The sampling was performed in summer (February) and winter (August) 2010, with Surber sampler, in three headwaters streams at Atlantic Forest, in southern Brazil. RESULTS: In the total 6,429 Chironomidae larvae were identified and classified into 96 taxa belonging to Chironominae, Tanypodinae and Ortocladiinae subfamilies. Among the microhabitats, the highest richness was observed in the deposits of litter, and the highest number of exclusive species took place in the pool regions. CONCLUSIONS: Thus, the composition and structure of the Chironomidae assemblage are directly related to the availability and heterogeneity of habitats in streams.

Diet and habitat use of two sympatric species of Philodryas (Colubridae), in south Brazil

2005 ◽  
Vol 26 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Otávio Marques ◽  
Paulo Hartmann
Keyword(s):  
Habitat Use ◽  
Feeding Habits ◽  
Strong Relationship ◽  
Sympatric Species ◽  
Food Type ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Food Items ◽  
Forested Areas ◽  
South Brazil

AbstractFeeding habits and habitat use of the colubrid snakes Philodryas olfersii and P. patagoniensis in southern Brazil are presented here. Philodryas olfersii and P. patagoniensis are sympatric in the study area and both dwell in open and forested areas. Specimens preserved in collections and observations of snakes in the field yielded the data. Both species are diet generalists, feeding on small vertebrates, mainly frogs. Philodryas patagoniensis has a broader diet, a less variable frequency of food items, and fed on heavier prey than P. olfersii. Seasonal variation in diet occurs in both species. The semiarboreal Philodryas olfersii is more slender and has a longer tail than the terrestrial P. patagoniensis, characters that may reflect differences in microhabitat use. There are a strong relationship between habitat use and frequency of a given food type. Differences in the use of food resources between P. olfersii and P. patagoniensis seem to reflect differences in foraging microhabitats used by each species.

scholarly journals Food and Feeding Biology of Nile Tilapia (Oreochromis niloticus) in Lake Langeno, Ethiopia

2022 ◽  
Vol 14 (2) ◽  
pp. 974
Author(s):  
Mathewos Temesgen ◽  
Abebe Getahun ◽  
Brook Lemma ◽  
Geert P. J. Janssens
Keyword(s):  
Nile Tilapia ◽  
Feeding Strategy ◽  
Stomach Contents ◽  
Seasonal Effects ◽  
Animal Origin ◽  
Individual Level ◽  
Food Items ◽  
Feeding Biology ◽  
Fish Samples ◽  
Food And Feeding

This study aimed to investigate the natural feeding behavior of Nile tilapia in Lake Langeno, Ethiopia, with emphasis on potential spatial, size and seasonal effects on ingested food items. This study of the food and feeding biology of O. niloticus in Lake Langeno, Ethiopia, was conducted from March 2016to February 2017. Fish samples were collected monthly from six different sampling sites using different mesh sizes of gillnets. A total of 610 fish specimens with full stomachs were considered for the assessment of feeding biology. In total, seven food items, namely phytoplankton, zooplankton, insects, detritus, macrophytes, fish parts and nematodes, were identified from the fish stomach contents. Phytoplankton was the most commonly consumed food prey, followed by detritus, zooplankton and macrophytes. The other food items were occasionally and randomly consumed. Phytoplankton and detritus were the dominant food prey in the dry season, with zooplankton and macrophytes the main prey during the wet months. The contribution of phytoplankton, zooplankton and insects were slightly highest in small-sized groups (<10 cm), whereas detritus, macrophytes and fish parts were highest in larger-size groups (>20 cm) (p < 0.05). The present results point to a concurrence of the relative importance of dietary items at the individual level, species level and among the study sites. Phytoplankton was the primary consumed food item, which indicates the specialist feeding strategy of Nile tilapia in the lake. Generally, food items of plant origin, typically associated with less protein content than animal origin food items, dominated the stomach contents of Nile tilapia. The dietary pattern of Nile tilapia in Lake Langeno shifts with size and season, aspects that might warrant further study in view of aquaculture applications as well as climate change.

scholarly journals Spatial, seasonal and ontogenetic variation in the diet of Astyanax aff. fasciatus (Ostariophysi: Characidae) in an Atlantic Forest river, Southern Brazil

2009 ◽  
Vol 7 (2) ◽  
pp. 257-266 ◽  
Author(s):  
Luciano Lazzarini Wolff ◽  
Vinícius Abilhoa ◽  
Flavia Sant'Anna Rios ◽  
Lucélia Donatti
Keyword(s):  
Resource Availability ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Animal Origin ◽  
Spatial And Temporal Variation ◽  
Plant Origin ◽  
Southern Brazil ◽  
Food Items ◽  
Terrestrial Insects ◽  
Common Items

This study described the feeding habits of the characin Astyanax aff. fasciatus. The diet compositions of specimens from two sites (A and B) on a river in Southern Brazil were compared according to the size of individuals and seasonal period. The collections were performed monthly from March 2005 to February 2006, where the stomach contents of 290 specimens were assessed. Food items for A. aff. fasciatus were basically composed of plants and insects, especially leaf fragments, seeds, fruits, filamentous algae, aquatic and terrestrial insects and insect fragments. At site A, the most common items were insect and plant fragments. Conversely at site B, plant fragments were more representative. In general, all items of animal origin showed the highest feeding index values at site A, whereas at site B detritus and grass items were more abundant. The composition of items varied seasonally, with higher diversity of items being recorded during the spring at both sites. Smaller individuals preferred items of animal origin, while the larger ones consumed mainly items of plant origin. According to its size, A. aff. fasciatus in this study may be considered a species with insectivorous tendencies when immature or herbivorous tendencies when adult. Nevertheless, its feeding habits may be flexible according to resource availability, showing wide ontogenetic, besides spatial and temporal variation.

scholarly journals Age and growth of Pimelodella pappenheimi (siluriformes, pimelodidae) from an Atlantic Forest Stream in Southern Brazil

1999 ◽  
Vol 42 (4) ◽  
Author(s):  
Marina Faria do Amaral ◽  
José Marcelo Rocha Aranha ◽  
Márcia Santos de Menezes
Keyword(s):  
Atlantic Forest ◽  
Flash Flood ◽  
Growth Curves ◽  
Ring Formation ◽  
Age And Growth ◽  
Southern Brazil ◽  
Total Length ◽  
Forest Stream ◽  
Second Year ◽  
Electric Fishing

Studies were performed to determine the growth curves in length and weight for Pimelodella pappenheimi in the "das Pombas" stream, a coastal stream susceptible to the flash flood phenomenon. Samples were collected from September-95 to February-97, monthly, using electric fishing. The fishes were measured in total length and weight. A total of 156 pairs of otholits were taken for ring reading. The Ford-Walford transformation allowed the use of von Bertallanffy expression. The pale ring formation was annual, and it occurred between the summer and the autumn. This species grews in length according to Lt=15.86 (1-e-0.57(t+0.1551) ) equation and in weight according to Wt= 24.23 (1-e-0.57(t+0.1551) )3.12. The increase in length was faster until the second year of life, whereas the increase in weight was more noticeable between the first and fourth years of life.

scholarly journals Culture-independent assessment of the diazotrophic Bradyrhizobium communities in the Pampa and Atlantic Forest Biomes localities in southern Brazil

2021 ◽  
pp. 126228
Author(s):  
Joanna Banasiewicz ◽  
Bruno B. Lisboa ◽  
Pedro B. da Costa ◽  
Gilson Schlindwein ◽  
Stephanus N. Venter ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Southern Brazil ◽  
Culture Independent ◽  
Independent Assessment

scholarly journals Recovery of litter inhabiting beetle assemblages during forest regeneration in the Atlantic forest of Southern Brazil

2010 ◽  
Vol 3 (2) ◽  
pp. 103-113 ◽  
Author(s):  
PHILIPP W. HOPP ◽  
RICHARD OTTERMANNS ◽  
EDILSON CARON ◽  
STEFAN MEYER ◽  
MARTINA ROß-NICKOLL
Keyword(s):  
Atlantic Forest ◽  
Forest Regeneration ◽  
Southern Brazil ◽  
Beetle Assemblages

The diet of red foxes, Vulpes vulpes L., in Victoria

1973 ◽  
Vol 21 (3) ◽  
pp. 391 ◽  
Author(s):  
BJ Coman
Keyword(s):  
Vulpes Vulpes ◽  
Regional Differences ◽  
Plant Material ◽  
Stomach Contents ◽  
Red Foxes ◽  
Main Food ◽  
Food Items ◽  
Over Time

Stomach contents were examined for 1229 foxes collected in Victoria during 1968-70. Of these, 967 stomachs contained measurable quantities of food. The fox appears to have a very wide dietary range but is predominantly carnivorous. The main food items encountered were rabbits, sheep carrion, and mice. Lesser amounts of native mammals, birds, cold-blooded vertebrates, invertebrates, and plant material were encountered. For many foods, particularly insects, the intake was markedly seasonal. Regional differences in diet were also apparent. Much of the variation in intake of particular foods over time and between regions was explicable in terms of changing availabilities of these foods.

Three new Anaulacomera species (Orthoptera: Tettigoniidae: Phaneropterinae) from the Iguaçu National Park and nearby areas, southern Brazil

Zootaxa ◽  
2021 ◽  
Vol 5061 (2) ◽  
pp. 340-352
Author(s):  
MARCOS FIANCO ◽  
OSCAR J. CADENA-CASTAÑEDA ◽  
NEUCIR SZINWELSKI ◽  
LUIZ R. R. FARIA
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
National Park ◽  
Species Group ◽  
Southern Brazil ◽  
Distribution Maps ◽  
Incertae Sedis ◽  
Present Distribution ◽  
Species Groups ◽  
Three New Species

Three new species of Anaulacomera are described, Anaulacomera (Anaulacomera) mariellae sp. n. and Anaulacomera (Anallomes) arlindoi sp. n., belonging respectively to the Inermis and Lanceolata species group, and Anaulacomera angelinae sp. n., placed as incertae sedis. The individuals were collected at the Iguaçu National Park and adjacent small fragments of Atlantic Forest, in southwestern Paraná state, Brazil. The description was based on external morphology of males. We also present distribution maps for the species of the Inermis and the Lanceolata species groups.  

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