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Registros recuperados: 9
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Food deprivation does not affect growth performance of juvenile tambacu Acta Amazonica
PAZ,Arlan de Lima; PASTRANA,Yugo Moraes; BRANDÃO,Lian Valente.
ABSTRACT The objective of this study was to evaluate the efficiency of food deprivation on the growth performance of the commercially important hybrid fish tambacu (Piaractus mesopotamicus male × Colossoma macropomum female). For this, 171 juveniles of average length 8 cm and 11.4 g body mass were distributed in nine tanks, and allocated to three treatments: the fish were fed every day (control), fed for six days followed by one day of food deprivation (6F/1D) and fed for five days followed by two days of food deprivation (5F/2D). After 77 days, all animals achieved similar growth rates. Only animals submitted to two days of food deprivation presented hyperphagia. There was a reduction in total feed consumption of 3.8% and 10.8% for the 6F/1D and 5F/2D...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Fish farming; Feeding strategy; Compensatory growth.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300207
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The partitioning of food resources between two rodents in the subtropical region of southern Brazil Anais da ABC (AABC)
ESPINELLI,FÁBIO P.; CORRÊA,FABIANO; COLARES,ELTON P.; COLARES,IONI G..
ABSTRACT The capybara (Hydrochoerus hydrochaeris) and nutria (Myocastor coypus) are herbivorous semi-aquatic rodents. Although these rodents occur in sympatry in southern South America, little is known about how the two species interact in relationship to food resources. In this context, the aim of this study was to analyze the food resource overlap, the feeding strategy and the diversity of the diet of capybaras and nutria. A micro-histological analysis of feces was used to study the diets. A total of 48 plant species belonging to 10 families were identified in the diet of H. hydrochaeris, and a total of 49 species belonging to 14 families were identified in the diet of M. coypus. According to the Amundsen graphical method, both rodents adopted a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diet overlap; Feeding strategy; Herbivores; Micro-histological analysis..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100191
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Feeding ecology of juvenile dog snapper Lutjanus jocu (Bloch and Shneider, 1801) (Lutjanidae) in intertidal mangrove creeks in Curuçá estuary (Northern Brazil) BABT
Monteiro,Dijane Pantoja; Giarrizzo,Tommaso; Isaac,Victoria.
The diet and feeding ecology of juvenile dog snapper (Lutjanus jocu) were investigated in 92 specimens collected in four intertidal mangrove creeks of Curuçá estuary, Northern Brazil, between September 2003 and July 2004. No significant differences in total length were found between the sampling months. Feeding intensity was high as indicated by high stomach fullness index and low vacuity index. The most important prey was Penaeidae, followed by Grapsidae and Porcellanidae. The diet of juvenile dog snapper showed clear seasonal differences. Specimens from dry season (September and November) and dry / wet season transition (January), were specialists feeding exclusively on Penaeidae. However, the specimens from wet season (March and May) and wet /dry season...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Estuary; Feeding habits; Feeding strategy; Juvenile fish; Lutjanus jocu; Intertidal mangrove creek.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600014
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Changements ontogéniques de la condition larvaire chez une espèce de poisson à reproduction hivernale, le hareng des Downs ArchiMer
Denis, Jeremy.
The larval condition of Downs herring during the critical period was investigated between 2008 and 2015 in the eastern English Channel and Southern Bight of North Sea from data collected during the International Bottom Trawl Survey (IBTS). First, the study of the feeding strategy from gut contents analysis using two complementary approaches (electronical microscopy and measure of fluorescence) revealed a shift in the feeding diet occurring at a larval size of 13 mm. Smaller larvae had an omnivorous and a more diversified diet composed of numerous protist and small zooplanktonic preys whereas bigger larvae had a less diversified diet composed mainly of bigger zooplanktonic prey. Along with the diet shift, combination of four condition indices (ingestion...
Tipo: Text Palavras-chave: Hareng des Downs; Condition larvaire; Nutrition; Croissance; Période critique; Manche-mer du Nord.; Downs herring; Larval condition; Feeding strategy; Growth; Critical period; English Channel-North Sea..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00386/49701/50227.pdf
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Feeding strategy of Downs herring larvae (Clupea harengus L.) in the English Channel and North Sea ArchiMer
Denis, Jeremy; Vallet, Carole; Courcot, Lucie; Lefebvre, Valerie; Caboche, Josselin; Antajan, Elvire; Marchal, Paul; Loots, Christophe.
This study aims to characterize the larval feeding strategy of the Downs sub-population of North Sea herring (Clupea harengus L.). Diet composition, vacuity rate and prey selectivity of larvae from 8 to 15 mm collected during the International Bottom Trawl Survey (IBTS) - MIK sampling from 2008 to 2013 were assessed by direct observation of their gut contents using Scanning Electron Microscopy (SEM). The high contribution of protists and small zooplanktonic prey observed in the gut contents proved the relevance of SEM to study the diet of first feeding larvae. The relatively low vacuity rate of 45% suggests that food may not be a limiting factor for Downs herring larvae in winter. These larvae appeared to be omnivorous and there was a clear shift in term...
Tipo: Text Palavras-chave: Diet; Feeding strategy; Selectivity index; Scanning electronic microscopy; Downs herring larvae; Gut content.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00345/45606/45226.pdf
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Feeding ecology of the endangered huemul (Hippocamelus bisulcus) in Los Alerces National Park, Argentina Mastozool. neotrop.
Vila,Alejandro R.; Galende,Gladys I.; Pastore,Hernán.
The huemul (Hippocamelus bisulcus) is one of the most endangered and less known neotropical deer. We evaluated its diet in Los Alerces National Park, Argentina. Botanical composition of the diet was studied seasonally using microhistological analysis of fecal samples. Twenty six of the 72 available plant species were recorded in the huemul diet. The annual diet was largely dominated by shrubs (mean + SE= 64.7 + 2.4%) and trees (28.1 + 2.4%). Forbs and grasses only represented 4.6 + 1.1% and 2.5 + 0.6%. The huemul predominantly fed on Nothofagus sp., Maytenus sp., Embothrium coccineum, Schinus patagonicus and Gaultheria mucronata. Diet composition changed significantly between warm-growing and cold-dormant periods. The annual niche breadth was low,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cervidae; Deer; Diet composition; Feeding strategy; Patagonia.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000200014
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Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean Neotropical Ichthyology
Loor-Andrade,Peggy; Pincay-Espinoza,Jonathan; Carrera-Fernández,Maribel; Rosas-Luis,Rigoberto.
ABSTRACT The feeding habits of Makaira nigricans, Kajikia audax, Istiophorus platypterus (Istiophoridae), and Xiphias gladius (Xiphiidae) in the southeast Pacific Ocean were examined in Manta and Santa Rosa, Ecuador. This study describes the diets of these billfish species, evaluates dietary differences between species, and assesses seasonal differences in diet. A total of 274 M. nigricans, 321 K. audax, 267 I. platypterus, and 252 X. gladius were collected between February 2014 and April 2015. The scombrid Auxis spp. was the most important prey for M. nigricans, K. audax and I. platypterus, while the squid Dosidicus gigas was the most important prey for X. gladius. The results of the ANOSIM confirmed significant differences in feeding habits between the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding strategy; Food partitioning; Istiophoridae; Trophic ecology; Xiphiidae.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300204
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The feeding habits of the endemic Remo flounder, Oncopterus darwinii (Actinopterygii: Pleuronectidae), in an exposed sandy beach’s surf zone in southern Brazil Rev. Bras. Zool.
Lameiro,Fábio R.; Condini,Mario V.; Brito,Cíntia P.; Vieira,João P..
ABSTRACT The Remo flounder, Oncopterus darwinii Steindachner, 1874 is a small Pleuronectidae (~ 250 mm TL) distributed in the warm-temperate zone from Santa Catarina (28°S - Brazil) to the Gulf of San Matías (42°S - Argentina). We studied the occurrence and diet of juveniles of this flatfish (85% < 100 mm TL) for one year (August 2009 to July 2010) in a southern Brazilian sandy beach. Individuals were much more common in spring and early summer than in the other seasons. Of the 758 individuals analyzed, only 69 (9.1%) were found with empty stomachs. The Remo flounder fed predominantly on small crustaceans (gammarid amphipods, mysids and the hipiidae Emerita brasiliensis Schmitt, 1935) and no seasonal differences were found in the composition of the diet...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding strategy; Flatfish; Marine fish; Southwestern Atlantic Ocean.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100331
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Levels of feed supplementation on the qualitative aspects of meat from crossbred goats finished on caatinga Rev. Ciênc. Agron.
Silva,Daniel Cézar da; Guim,Adriana; Santos,Gladston Rafael de Arruda; Maciel,Maria Inês Sucupira; Soares,Luciana Felizardo Pereira.
ABSTRACTThe effect was evaluated of feed supplementation (0.0, 0.4, 0.8, and 1.2% of body weight) on the qualitative aspects of goat meat (moisture, ash, fat, protein, colouring using the CIE (L*, a* and b *) system, pH, cooking loss and shear force), and also on the sensory attributes of goat aroma, off-aroma, colour, texture, tenderness, flavour, off-flavour, juiciness and overall appearance. A total of 32 crossbred Anglo-Nubian goats were used, organised into randomised blocks and finished on a pasture of caatinga. There was a quadratic effect (p<0.05) on the levels of ash and protein, with a maximum of 1.06 and 20.44 g/100 g respectively. A positive linear affect (p<0.05) was seen on fat levels, with an increase of 0.52 g/100 g. There was a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Meat colouring; Feeding strategy; Native pasture; Flavour; Tenderness.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400855
Registros recuperados: 9
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