Feeding ecology of Dash-dot Tetra Hemigrammus belottii(Steindachner 1882) (Characiformes: Characidae) in the streams of the Urucu River basin, central Amazonia, Brazil

The present study describes aspects of feeding ecology of Dash-dot TetraHemigrammus belottii (Characiformes: Characidae) collected in the Urucu River basin in Coari, Amazonas (Brazil), aims to respond the following question: What is the influence of hydrological periods (dry and wet) and spatial distribution in the diet of H. belottii? The specimens were collected between 2006 and 2009 in seven streams in the Urucu basin using standard capture methods. Their stomachs were removed for diet composition analyses. The alimentary items were weighed and identified for subsequent analyzes related to feeding intensity by repletion index (RI%) and importance by alimentary index (AIi%). A total of 227 specimens were analyzed, with a mean standard length of 16.5±5.6 mm. The RI% values indicated that H. belottii fed more intensively during the dry season. The principal items in the diet were Formicidae (IAi% = 69.6), fragments of allochthonous exoskeleton (IAi% = 17.7), and Coleoptera (IAi% = 6.0). The composition of the diet did not vary significantly between seasons or among habitats, which may be related to the abundance of the items exploited by the species throughout the year. Hemigrammus belottii showed a generalist insectivore feeding habits which was mainly composed by allochthonous item.

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Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

Acta Amazonica ◽

10.1590/1809-4392201600123 ◽

2016 ◽

Vol 46 (3) ◽

pp. 259-270 ◽

Cited By ~ 7

Author(s):

Bruno da S. PRUDENTE ◽

Pedro CARNEIRO-MARINHO ◽

Roberta de M. VALENTE ◽

Luciano F. de A. MONTAG

Keyword(s):

Feeding Ecology ◽

Diet Composition ◽

Niche Breadth ◽

Life Stage ◽

Flood Pulse ◽

Feeding Intensity ◽

High Tendency ◽

Flood Season ◽

River Region ◽

The Relationship

Abstract Studies on feeding ecology of fishes are important to understand the relationship between species and environmental seasonal variations. In tropical rivers, these relationships are mainly modeled by hydrological patterns. Thereby, this study aimed to assess the influence of fluviometric variation and life stage (juveniles and adults) in the feeding ecology of Serrasalmus gouldingi in the lower Anapu River region, located in Eastern Amazon, Pará, Brazil. Specimens were collected bimonthly, considering four different hydrological periods. We assessed the diet composition, feeding intensity and niche breadth of the species. Thirty-two dietary items were identified and grouped into ten categories. A total of 279 stomachs were analyzed, showing a predominance of fish fragments, followed by fruits and seeds. The diet composition of S. gouldingi differed only between drought and flood season, although it did not differ between juveniles and adults. An increase in feeding intensity was recorded during the rise in the water level, with a lower feeding intensity observed during transitional season. Serrasalmus gouldingi showed lower niche breadth during flood season, attributed to the high consumption of fruits and seeds, presenting an omnivorous diet with high tendency towards piscivory. Although less evident than in other Amazon watersheds, the flood pulse in the lower Anapu River region is an important factor influencing the feeding ecology of the species.

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Food and feeding habits of the greenback grey mullet Liza subviridis (Valenciennes, 1836) from Parangipettai waters, south-east coast of India

Indian Journal of Fisheries ◽

10.21077/ijf.2016.63.4.60271-20 ◽

2016 ◽

Vol 63 (4) ◽

Author(s):

M. Ashiq Ur Rahman ◽

P. S. Lyla ◽

S. Ajmal Khan

Keyword(s):

Feeding Ecology ◽

Food Item ◽

East Coast ◽

Feeding Habits ◽

Well Being ◽

Grey Mullet ◽

Feeding Intensity ◽

Food And Feeding ◽

Males And Females ◽

Sand Particles

The feeding ecology and prey preference of greenback grey mullet Liza subviridis (Valenciennes, 1836) were investigated in Parangipettai waters (11°29′25.55″N; 79°45′38.62″E) from May 2011 to April 2012. A total of 328 male and 360 female specimens of L. subviridis were analysed. Detritus and sand particles formed the major food item of L. subviridis in both sexes besides, diatoms, dinoflagellates, algae, zooplankton, foraminiferans, polychaetes and larval forms were also noticed and ranked respectively based on the quantities. Feeding intensity showed that the percentage of ‘empty’ stomachs varied from 7.2% (November 2011) to 19.3% (August 2011) and from 7.1% (March 2012) to 19.2% (August 2011) in males and females respectively whereas the ‘gorged’ stomach in males and females was in the ranges of 4.6% (March 2012) - 14.5% (December 2011) and 4.6% (September 2011) - 14.5% (April 2012). The gastrosomatic index of males and females ranged between 5.9% (October 2011) - 8.2% (May 2011) and 6.1% (March 2012) - 8.1% (May 2011) respectively. The results agree with the previous reports and extend the understanding on its well-being, reproductive seasons and stock of L. subviridis in Parangipettai waters.

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Comparison of the feeding ecology of Perisesarma eumolpe collected at the intact forest and gap areas of Can Gio mangrove forest after ten years of Durian typhoon

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v2i6.850 ◽

2019 ◽

Vol 2 (6) ◽

pp. 105-110

Author(s):

Tran Ngoc Diem My ◽

Tran Le Quang Ha

Keyword(s):

Feeding Ecology ◽

Natural Environment ◽

Mangrove Forest ◽

Diet Composition ◽

Dry Season ◽

Stomach Fullness ◽

Crab Species ◽

Food Category ◽

Can Gio Mangrove ◽

Positive Results

Perisesarma eumolpe is the dominant crab species in the Can Gio mangrove forest, which is affected by bidirectional interaction with the natural environment. After 10 years of Durian typhoon, Perisesarma eumolpe has had significant changes and adaptations on its growth in Can Gio mangrove forest. One of the main changes is their diets between the intact forest and the gap areas which are natural reforestation. The dry season results showed that the fullness of the stomach (S4) was the highest in the total analyzed stomaches. The fullness of the stomach of the P. eumolpe in the gap area (Hcut) is always higher than the rest area. The main diet composition of the P. eumolpe are seven food categories: decomposed leaves, bark, wood, animal debris, algae, sand, unidentified debris. Leaves are dominant food category in both forest and gap areas. To compare with the result obtained in 2007, the feeding ecology of P. eumolpe was initially recorded. These are the increase in stomach fullness, leaves are dominant in the gap area. There are the positive results from the natural reforestation of Can Gio mangroves in the gap area caused by Durian typhoon.

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Spatial Distribution and Temporal Trends in the Daily Precipitation Concentration across the Yarlung Tsangpo River Basin: Eastern Himalaya of China

Advances in Meteorology ◽

10.1155/2020/8813394 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11

Author(s):

Mengtao Zhu ◽

Meng Li ◽

Chunyu Liu ◽

Yinfei Wang ◽

Jiqiu Li ◽

...

Keyword(s):

Spatial Distribution ◽

River Basin ◽

Daily Precipitation ◽

Temporal Trends ◽

Dry Season ◽

Precipitation Concentration ◽

Rescaled Range Analysis ◽

Significant Downward Trend ◽

Yarlung Tsangpo ◽

Yarlung Tsangpo River

Understanding the temporal inequality in precipitation is of great importance for water resource management, environmental risk management, and ecological conservation. This study investigated the spatial patterns and trends of the daily precipitation concentration over the Yarlung Tsangpo River Basin using the concentration index (CI) and the Lorentz asymmetric coefficient (LAC). A Mann–Kendall test and Hurst’s rescaled range analysis were used to detect the change in CI trends. The CI ranged from 0.58 to 0.65, suggesting that a quarter of the rainiest days contributed approximately 69–78% of the total precipitation. The LAC analysis indicated that the nonuniform distribution of precipitation was mainly attributed to a large proportion of days with light rainfall. Compared with that of the central region, the daily precipitation in the western and eastern regions was more irregular. At a seasonal scale, the dry season had a less homogeneous spatial distribution of CI compared to that of the wet season. Most areas exhibited no significant trends in CI from 1970 to 2017. A quarter of the stations presented a significant downward trend in CI, which were primarily found in the central and northern regions. In addition, the future trends of CI in most areas mostly agree with those of the current state; however, the majority of stations exhibited an uneven precipitation distribution in the dry season.

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Feeding ecology of black anglerfish Lophius budegassa: seasonal, bathymetric and ontogenetic shifts

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315406013816 ◽

2006 ◽

Vol 86 (4) ◽

pp. 877-884 ◽

Cited By ~ 29

Author(s):

Izaskun Preciado ◽

Francisco Velasco ◽

Ignacio Olaso ◽

Jorge Landa

Keyword(s):

North Atlantic ◽

Feeding Ecology ◽

Diet Composition ◽

Atlantic Coast ◽

Stomach Contents ◽

Large Prey ◽

Age Classes ◽

Feeding Intensity ◽

Merluccius Merluccius ◽

Important Prey

The diet of black anglerfish Lophius budegassa is described for the Cantabrian Sea (North Atlantic coast of Spain) from seasonal samples obtained onboard commercial vessels from January 1993 to December 1994. The stomach contents of fish caught on the continental shelf were examined, and differences in the diet in relation to age-class, season and depth were studied. The age-classes were grouped according to a cluster analysis of diet composition. As a result, three groups were obtained: the first two corresponded to juveniles between 2 and 7 years old, and the third one corresponded to adults between 8 and 15 years old. Although Micromesistius poutassou was an important prey for all ages, the youngest black anglerfish fed mainly on small benthic fish. In contrast, large prey species such as Phycis blennoides and Merluccius merluccius were eaten almost exclusively by adults. The diet composition changed during the year. The changes in the diet of black anglerfish older than 3 years were more related to seasonal differences than to between-size differences. These seasonal shifts were mainly marked by the varying importance of Trachurus trachurus and M. merluccius in their diet. Feeding intensity also showed seasonal variations, with a significant decrease in autumn. An indirect effect of depth on the feeding ecology of black anglerfish was also found, since both age and diet composition changed with depth.

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On the diet of two endemic and rare species of Trichomycterus (Ostariophysi: Trichomycteridae) in the Jordão River, Iguaçu River basin, southern Brazil

Estudos de Biologia ◽

10.7213/estud.biol.7848 ◽

2013 ◽

Vol 35 (84) ◽

Cited By ~ 1

Author(s):

Almir Petersen Barreto ◽

Fabiane Cristina Armiliato ◽

Vanessa Maria Ribeiro ◽

Vinícius Abilhoa

Keyword(s):

River Basin ◽

Diet Composition ◽

Feeding Habits ◽

Monitoring Program ◽

Stomach Contents ◽

Scaling Analysis ◽

Multidimensional Scaling Analysis ◽

Organic Detritus ◽

Energetic Complex ◽

Iguaçu River

The diet and the eect of body size on the feeding habits of Trichomycterus crassicaudatus and Trichomycterus stawiarski, collected in the Jordão River, an import tributary of the Iguaçu River basin, were investigated. Samples were collected in august 2003 during the Jordão River Energetic Complex Aquatic Fauna Rescue and Monitoring program. Stomach contents were evaluated through the frequency of occurrence, permutational multivariate analysis of variance (PERMANOVA), si-milarity percentage analysis (SIMPER) and non-metric multidimensional scaling analysis (MDS) methods. A total of 86 stomach contents of T. stawiarski and 36 of T. crassicaudatus were assessed. The species presented an insectivorous feeding habit, with differences in the diet composition of the “smallest” and the “largest” individuals. Ephemeroptera nymphs, lar-vae and pupae of Diptera, organic detritus and plant fragments were the most important food items. Both species feeding habits were based mainly in benthic aquatic immature insects.

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Feeding Ecology of Brook Silverside, Golden Shiner, and Subyearling Pumpkinseed in a Lake Ontario Embayment

Journal of Fish and Wildlife Management ◽

10.3996/092016-jfwm-075 ◽

2017 ◽

Vol 8 (1) ◽

pp. 240-248

Author(s):

James H. Johnson ◽

Marc A. Chalupnicki ◽

Ross Abbett ◽

Avriel R. Diaz ◽

Christopher C. Nack

Keyword(s):

Fish Species ◽

Feeding Ecology ◽

Diet Composition ◽

Lake Ontario ◽

Lepomis Gibbosus ◽

Feeding Intensity ◽

Terrestrial Invertebrates ◽

Golden Shiner ◽

Feeding Periodicity ◽

Surface Dwelling

Abstract Fish feeding ecology has been shown to vary over a 24-h period in terms of the prey consumed and feeding intensity. Consequently, in order to best determine the interspecific feeding associations within a fish community, examination of the diet at multiple times over a 24-h period is often necessary. We examined the diel feeding ecology of three fish species that were numerically dominant in a Lake Ontario embayment during summer. The diet of each of the three species, young-of-year Pumpkinseed Lepomis gibbosus, Golden Shiner Notemigonus crysoleucas, and Brook Silverside Labidesthes sicculus, was distinct with no significant overlap in diet composition occurring within any of the 4-h time intervals. The diet composition of each species suggested that Brook Silverside were feeding at the surface (terrestrial invertebrates and aquatic surface dwelling hemipterans), whereas young-of-year Pumpkinseed (amphipods) and Golden Shiner (tipulids) were feeding on different benthic prey. Differences in feeding periodicity were most pronounced for young-of-year Pumpkinseed. Our findings provide valuable insights on interspecific feeding associations among these three fish species during summer in a Lake Ontario embayment.

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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)

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132009000600014 ◽

2009 ◽

Vol 52 (6) ◽

pp. 1421-1430 ◽

Cited By ~ 10

Author(s):

Dijane Pantoja Monteiro ◽

Tommaso Giarrizzo ◽

Victoria Isaac

Keyword(s):

Food Availability ◽

Feeding Ecology ◽

Seasonal Changes ◽

Dry Season ◽

Stomach Fullness ◽

Wet Season ◽

Feeding Intensity ◽

Seasonal Differences ◽

Important Prey ◽

Northern Brazil

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 transition (July) that consumed mainly Grapsidae, Penaeidae and Porcellanidae were generalist. These seasonal changes in diet could be related to variations in food availability.

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Feeding ecology of the marsupial Thylamys macrurus (Olfers 1818) (Mammalia, Didelphidae) in woodland patches of Cerrado, central-western Brazil

Mammalia ◽

10.1515/mammalia-2017-0068 ◽

2018 ◽

Vol 83 (1) ◽

pp. 41-48 ◽

Cited By ~ 1

Author(s):

Geruza Leal Melo ◽

Sara Angélica Santos ◽

Jonas Sponchiado ◽

Nilton Carlos Cáceres ◽

Leonardo Guimarães Lessa

Keyword(s):

Feeding Ecology ◽

Diet Composition ◽

Seasonal Pattern ◽

Dry Season ◽

Consumption Pattern ◽

Wet Season ◽

Faecal Samples ◽

Males And Females ◽

Dietary Variation ◽

Foraging Pattern

Abstract Knowledge about the feeding ecology of didelphid marsupials remains incipient, especially in environments with marked seasonality in resource supply, such as in the Cerrado. We analysed the diet composition of Thylamys macrurus in Cerrado patches in central-western Brazil. We also evaluated seasonal and sexual variation in the species’ diet, as well as if the accumulation of fat in the tail shows a seasonal pattern. We obtained 87 captures of 68 T. macrurus specimens and 29 faecal samples. Six categories of food items (Hymenoptera, Isoptera, Coleoptera, Arachnida, Blattodea and seeds) were identified. Arthropods were recorded in all samples and seeds in 10.3%. The species showed seasonal variation in diet, consuming primarily of arthropods throughout the year but incorporating a higher proportion of fruits during the wet season. Males and females also differed in diet composition; males consumed a wider range of items in the dry season. Although more detailed analyses are still needed to better understand the T. macrurus food consumption pattern, our results indicate a possible relationship between dietary variation and local availability of resources, suggesting an opportunistic foraging pattern. The accumulation of fat in the tail also presents a seasonal pattern, with a larger tail diameter in the dry season.

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