scholarly journals 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

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.  

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

2013 ◽  
Vol 13 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Andrey Felipe Gomes Gonçalves ◽  
Bruno da Silveira Prudente ◽  
Fernando da Silva Carvalho Filho ◽  
Luciano Fogaça de Assis Montag
Keyword(s):  
Spatial Distribution ◽  
River Basin ◽  
Feeding Ecology ◽  
Standard Length ◽  
Diet Composition ◽  
Feeding Habits ◽  
Dry Season ◽  
Feeding Intensity ◽  
Central Amazonia

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.

scholarly journals Milk Composition of Asian Elephants (Elephas maximus) in a Natural Environment in Myanmar during Late Lactation

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 725 ◽  
Author(s):  
Ellen S. Dierenfeld ◽  
Yadana A. M. Han ◽  
Khyne U. Mar ◽  
Aung Aung ◽  
Aung Thura Soe ◽  
...  
Keyword(s):  
Natural Environment ◽  
Diet Composition ◽  
Field Studies ◽  
Milk Composition ◽  
Dry Season ◽  
Wet Season ◽  
Free Living ◽  
Asian Elephants ◽  
Feeding Management ◽  
Captive Populations

The nutritional content of milk from free-living Asian elephants has not previously been reported, despite being vital for better management of captive populations. This study analyzed both milk composition and consumed plant species of Asian elephants managed in their natural environment in Myanmar. Longitudinal samples (n = 36) were obtained during both the wet and the dry season from six mature females in mid to late lactation in 2016 and 2017. Milk composition averaged 82.44% water, with 17.56% total solids containing 5.23% protein, 15.10% fat, 0.87% ash, and 0.18 µg/mL vitamin E. Solids and protein increased with lactation month. Total protein in milk was higher during the wet vs. the dry season. Observed factors linked with maternal (age, parity, size and origin) and calf traits (sex) had significant associations with milk nutrient levels. Primary forages consumed contained moderate protein and fiber. Higher dietary protein during the wet season (11–25%) compared to the dry season (6–19%) may be linked with increased milk protein observed. Our results call for further field studies of milk and diet composition, over entire seasons/lactation periods, and across maternal and calf traits, to improve feeding management, with an overall goal of maximized health and survival.

scholarly journals Feeding ecology of juvenile dog snapper Lutjanus jocu (Bloch and Shneider, 1801) (Lutjanidae) in intertidal mangrove creeks in Curuçá estuary (Northern Brazil)

2009 ◽  
Vol 52 (6) ◽  
pp. 1421-1430 ◽  
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.

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

Mammalia ◽  
2018 ◽  
Vol 83 (1) ◽  
pp. 41-48 ◽  
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.

Diet composition and feeding ecology of Nibea albiflora in Xiangshan Bay, east China Sea

2013 ◽  
Vol 20 (6) ◽  
pp. 1284-1292
Author(s):  
Nan LIN ◽  
Yazhou JIANG ◽  
Xingwei YUAN ◽  
Jing GUO ◽  
Jianzhong LING ◽  
...  
Keyword(s):  
East China Sea ◽  
Feeding Ecology ◽  
Diet Composition ◽  
East China ◽  
China Sea ◽  
Xiangshan Bay ◽  
Nibea Albiflora

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

2016 ◽  
Vol 46 (3) ◽  
pp. 259-270 ◽  
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.

scholarly journals Feeding of mature cod (Gadus morhua) on the spawning grounds in Lofoten

2008 ◽  
Vol 65 (4) ◽  
pp. 571-580 ◽  
Author(s):  
Kathrine Michalsen ◽  
Edda Johannesen ◽  
Bjarte Bogstad
Keyword(s):  
Diet Composition ◽  
Gadus Morhua ◽  
Barents Sea ◽  
Lower Proportion ◽  
Clupea Harengus ◽  
Stomach Fullness ◽  
Spawning Grounds ◽  
Spawning Period ◽  
Established Fact ◽  
A Minor

Abstract Michalsen, K., Johannesen, E., and Bogstad, B. 2008. Feeding of mature cod (Gadus morhua) on the spawning grounds in Lofoten. – ICES Journal of Marine Science, 65: 571–580. Many authors state that cod (Gadus morhua) do not feed during the spawning period. However, this more or less established fact has rarely been investigated in the field. Here, the content of stomachs from Northeast Arctic cod (NEAC) and Norwegian coastal cod (NCC) sampled from the spawning ground in Lofoten were examined over a 10-year period (1996–2006). The occurrence of food in the stomachs of spawning cod, stomach fullness, diet composition, and variation in these variables between NEAC and NCC, year, and sex were analysed and compared. The analysis shows that cod do feed, even when they are in a spawning state. NCC had a lower proportion of empty stomachs and the stomachs were fuller than those from NEAC. Females had a lower proportion of empty stomachs than males and their stomachs were in general fuller. Herring (Clupea harengus) dominated the diet of cod. However, cod consumption of herring on the spawning grounds seems to be a minor source of mortality on herring. Although spawning cod do feed, the proportion of empty stomachs was higher and stomach fullness was lower than in stomachs of NEAC from the Barents Sea.

Diet Composition of Western Derby eland (Taurotragus Derbianus Derbianus) in the Dry Season in a Natural and a Managed Habitat in Senegal using Faecal Analyses

2010 ◽  
Vol 40 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Pavla Hejcmanová ◽  
Miloslav Homolka ◽  
Markéta Antonínová ◽  
Michal Hejcman ◽  
Veronika Podhájecká
Keyword(s):  
Diet Composition ◽  
Dry Season

Biodiversity of meiofauna in the intertidal khe nhan mudflat, can gio mangrove forest, vietnam with special emphasis on free living nematodes

2007 ◽  
Vol 42 (3) ◽  
pp. 135-152 ◽  
Author(s):  
Quang Ngo Xuan ◽  
Ann Vanreusel ◽  
Nguyen Vu Thanh ◽  
Nic Smol
Keyword(s):  
Mangrove Forest ◽  
Free Living ◽  
Can Gio Mangrove
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