scholarly journals Foraging ecology of the amphibious mudskipper Periophthalmus chrysospilos (Gobiiformes: Gobiidae)

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12582
Author(s):  
Quang Minh Dinh ◽  
Ton Huu Duc Nguyen ◽  
Tran Thi Huyen Lam ◽  
Tien Thi Kieu Nguyen ◽  
Giang Van Tran ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Intertidal Zone ◽  
Diet Composition ◽  
Foraging Ecology ◽  
Feeding Strategy ◽  
Mekong Delta ◽  
Food Composition ◽  
Food Items ◽  
Marine Connectivity ◽  
Dietary Component

The food composition and feeding ecology of fishes living in the intertidal zone play an essential role in understanding the energetic connectivity between terrestrial and aquatic systems. Periophthalmus chrysospilos is an amphibious fish species occurring in the intertidal zone, but data on its diet and foraging ecology is still poorly known. This study on Ps. chrysospilos was carried out from April 2020 to March 2021 at four sites within the Mekong Delta estuary to define the influence of spatio-temporal factors on the diet of this species. The diet composition and relative gut lengths (RGLs) of Ps. chrysospilos were analysed in relation to four parameters—sex, size, site, and season. A total of 1,031 individuals were collected, and their digestive tract lengths were used to calculate the RGL. The digestive tracts of only 546 individuals were with food items (approximately 1:1 of empty vs full digestive tract) and were subsequently used for further analyses. The ranges in total length and weight in both adult and juvenile individuals were 3.4–10.6 cm and 0.38–14.13 g, respectively. The RGL values varied with season, fish size and site, but was always lower than 1, indicating a predominantly carnivorous diet. The variability of food items found within the digestive tracts demonstrated its adaptability in pursuing prey items within the limits of the littoral zone, and its importance as a conduit of terrestrial-marine connectivity. This species is characterised as an opportunistic mesopredator feeding primarily on Acetes spp., Uca spp., Dolichoderus sp., and rarely on Polychaeta and Actinopterygii. Other items found within the digestive tract are Mollusca, and detritus. The diet composition of Ps. chrysospilos did not vary with season and size, but changed with sex and site parameters. Uca spp. contributed to the sexual variation in dietary component, whereas Mollusca, Uca spp., Dolichoderus sp. and detritus, were drivers for spatial variation in the dietary component. The research provides fundamental information on diet composition and feeding strategy, as well as contributes towards knowledge on foraging ecology and resource use by intertidal animal communities.

scholarly journals Diet Composition and Feeding Strategy of Nemipterus japonicus Bloch, 1791 from Tha-baw-seik, Myanmar

Bionatura ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 901-907
Author(s):  
Thet Htwe Aung
Keyword(s):  
Diet Composition ◽  
Food Item ◽  
Feeding Strategy ◽  
Stomach Content Analysis ◽  
Food Composition ◽  
Feeding Strategies ◽  
Relative Importance ◽  
Food Items ◽  
Importance Index ◽  
Nemipterus Japonicus

Food composition of Nemipterus japonicus was studied by analyzing about 600 specimens from Tha-baw-seik (Lat. 14° 05' and long. 98° 05' E), Myanmar during October 2016 to September 2017. Based on the stomach content analysis, the relative importance index (IRI value) was calculated, and the predator feeding strategies were conducted during the study period. This study showed that N. japonicus is a generally demersal carnivore, and its trophic spectrum was composed of 23 food items. Among them, algae had not been described as a food item for N. Japonicus in the other previous studies. Crustaceans were the most dominant diet in the guts in term of the IRI value. Also, fish items were commonly the most dominant food followed by prawn, crab, and Acetes spp in all length groups but sex variation had no significant food changes with their IRI value.

scholarly journals Diet and nematode infection in Proceratoprhys boiei (Anura: Cycloramphidae) from two Atlantic rainforest remnants in Southeastern Brazil

2011 ◽  
Vol 83 (4) ◽  
pp. 1303-1312 ◽  
Author(s):  
Thaís Klaion ◽  
Mauricio Almeida-gomes ◽  
Luiz E. R. Tavares ◽  
Carlos F. D. Rocha ◽  
Monique Van Sluys
Keyword(s):  
Digestive Tract ◽  
Leaf Litter ◽  
Larval Stage ◽  
Diet Composition ◽  
Infection Intensity ◽  
Nematode Species ◽  
Helminth Fauna ◽  
Atlantic Rainforest ◽  
Southeastern Brazil ◽  
Food Items

Proceratophrys boiei is an endemic cycloramphid anuran inhabiting the leaf litter of Atlantic rainforests in Southeastern Brazil. We analyzed the whole digestive tract of 38 individuals of Proceratophrys boiei collected in two Atlantic Rainforest areas in the state of Rio de Janeiro, Brazil, to study the diet composition and the helminth fauna associated with this species. The main food items in P. boiei's diet were Coleoptera, Orthoptera and Blattaria. Five nematode species were found: Aplectana delirae, Cosmocerca parva, Oxyascaris oxyascaris, Physaloptera sp. (larval stage only) and an unidentified nematode. Overall prevalence was 71% and mean infection intensity was 7.3 ± 5.8 neatodes per individual.

scholarly journals Variation in diet composition of the mudskipper, Periophthalmodon septemradiatus, from Hau River, Vietnam

2020 ◽  
Vol 96 (3) ◽  
pp. 487-500 ◽  
Author(s):  
Quang Minh Dinh ◽  
Lam Thanh Tran ◽  
Tuyet Thi Minh Tran ◽  
Diem Kieu To ◽  
Tien Thi Kieu Nguyen ◽  
...  
Keyword(s):  
Data Analysis ◽  
Diet Composition ◽  
Food Item ◽  
Mekong Delta ◽  
Food Composition ◽  
Carnivorous Fish ◽  
Fish Size ◽  
Fish Samples ◽  
Males And Females ◽  
Main Food Item

Periophthalmodon septemradiatus (Hamilton, 1822) is a mudskipper of the Mekong Delta that can be found along estuaries and lower reaches of rivers. In the present study, we determined diet and feeding ecology of this species by analyzing the contents within the stomachs of 1360 fish samples collected from August 2017 to July 2018. Data analysis suggested that P. septemradiatus is a carnivorous fish. We found six main food item categories: small fishes, prawns (Acetes spp.), crabs (Uca spp.), molluscs, ants (Dolichoderus sp.), and detritus. Both males and females at different sizes, seasons, and habitats ingest primarily Dolichoderus sp., secondarily detritus, and rarely other prey. Diet composition was similar between sexes but varied according to fish size, season, and habitat. Dolichoderus sp. and detritus regulate the spatial variation of food composition. Our findings contribute to future artificial cultivation for conservation.

scholarly journals Assessing diet composition of seahorses in the wild using a non destructive method: Hippocampus reidi (Teleostei: Syngnathidae) as a study-case

2008 ◽  
Vol 6 (4) ◽  
pp. 637-644 ◽  
Author(s):  
André Luiz da Costa Castro ◽  
Aline de Farias Diniz ◽  
Ieda Zaparolli Martins ◽  
Ana Lúcia Vendel ◽  
Tacyana Pereira Ribeiro de Oliveira ◽  
...  
Keyword(s):  
Diet Composition ◽  
Niche Breadth ◽  
Feeding Strategy ◽  
Gut Contents ◽  
Natural Diet ◽  
Food Items ◽  
Taxonomic Level ◽  
In The Wild ◽  
Study Case ◽  
Non Destructive

This paper presents the results of the first analysis of the natural diet of Hippocampus reidi, one of the most sought after seahorse species in the international aquarium trade. Its main goals were to investigate food items and prey categories consumed by the species, and to discuss feeding strategy and inter and intra-individual components of niche breadth. Data were gathered from October 2005 to September 2006 at the Mamanguape estuary, State of Paraíba, NE Brazil. Food items from seahorses anaesthetized with clove oil were obtained by using a modified version of the flushing method, and were counted and identified to the lowest possible taxonomic level. Specimens were marked and had their height, sex, life and reproductive stage recorded, and then returned to the same place where they were found for the further assessment of anaesthetization/gut flushing on seahorses. Food items were analyzed using frequency of occurrence, relative abundance, index of preponderance and prey-specific abundance using the points method. The graphic method of Amundsen et al. (1996) was used to interpret the feeding strategy and contribution to niche breadth. Nematodes and crustaceans were the most important items found, the latter item usually being the most commonly found in the gut contents of syngnathids. No significant differences in diet composition were found between reproductive stages, however, a higher proportion of large items were consumed by the larger seahorses. The feeding strategy and niche breadth analysis suggests that H. reidi has a generalist feeding strategy, with high variation between phenotypes. Our results suggest that the anaesthetization-flushing technique has the potential to be a useful tool in seahorse research.

scholarly journals The Design and Development of a Food Composition Database for an Electronic Tool to Assess Food Intake in New Caledonian Families

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1668
Author(s):  
Juliana Chen ◽  
Solène Bertrand ◽  
Olivier Galy ◽  
David Raubenheimer ◽  
Margaret Allman-Farinelli ◽  
...  
Keyword(s):  
New Caledonia ◽  
Phase 1 ◽  
Saturated Fat ◽  
Food Composition ◽  
Mobile App ◽  
Portion Size ◽  
Cross Sectional ◽  
Food Items ◽  
Specific Food ◽  
Country Specific

The food environment in New Caledonia is undergoing a transition, with movement away from traditional diets towards processed and discretionary foods and beverages. This study aimed to develop an up-to-date food composition database that could be used to analyze food and nutritional intake data of New Caledonian children and adults. Development of this database occurred in three phases: Phase 1, updating and expanding the number of food items to represent current food supply; Phase 2, refining the database items and naming and assigning portion size images for food items; Phase 3, ensuring comprehensive nutrient values for all foods, including saturated fat and total sugar. The final New Caledonian database comprised a total of 972 food items, with 40 associated food categories and 25 nutrient values and 615 items with portion size images. To improve the searchability of the database, the names of 593 food items were shortened and synonyms or alternate spelling were included for 462 foods. Once integrated into a mobile app-based multiple-pass 24-h recall tool, named iRecall.24, this country-specific food composition database would support the assessment of food and nutritional intakes of families in New Caledonia, in a cross-sectional and longitudinal manner, and with translational opportunities for use across the wider Pacific region.

An extensive study of the foraging ecology of beavers (Castor canadensis) in relation to habitat quality

2004 ◽  
Vol 82 (6) ◽  
pp. 922-933 ◽  
Author(s):  
D Gallant ◽  
C H Bérubé ◽  
E Tremblay ◽  
L Vasseur
Keyword(s):  
Habitat Quality ◽  
Foraging Behaviour ◽  
Foraging Ecology ◽  
Castor Canadensis ◽  
Central Place ◽  
Foraging Theory ◽  
Extensive Study ◽  
Food Items ◽  
Partial View ◽  
Selection Of

The objective of this study was to examine the foraging behaviour of the beaver (Castor canadensis Kuhl, 1820) and to explain its selection of terrestrial woody plant species according to central place foraging theory. Limitations in variety of food items in most studies with regard to size and (or) distance from the central place and information on availability of forage choices give a partial view of the subject. In this study, the theory is tested in a natural environment with high variability in food items with regard to these factors. Foraging choices by beavers were inspected by measuring variables on cut and uncut trees of every species encountered within 1 m of trail systems made by 25 beaver colonies in Kouchibouguac National Park in New Brunswick, Canada, thereby quantifying the availability of the different food items. The effect of habitat quality (food availability) on the foraging behaviour of beavers was also tested. The results of this study suggest that with increasing distance from the pond, beavers in high-quality habitats selected fewer, but larger, trees and are more species selective. This selectivity was diminished in habitats of lower quality. The results of this study are consistent with the predictions of the central foraging theory.

scholarly journals FDMine: a graph mining approach to predict and evaluate food-drug interactions

2021 ◽  
Author(s):  
Md Mostafizur Rahman ◽  
Srinivas Mukund Vadrev ◽  
Arturo Magana-Mora ◽  
Jacob Levman ◽  
Othman Soufan
Keyword(s):  
Drug Interactions ◽  
Graph Mining ◽  
Characteristic Curve ◽  
Ground Truth ◽  
Recovery Process ◽  
Food Composition ◽  
Accuracy Evaluation ◽  
Chemical Structures ◽  
Food Items ◽  
Drug Similarity

Abstract Food-drug interactions (FDIs) arise when nutritional dietary consumption regulates biochemical mechanisms involved in drug metabolism. These interactions can create unexpected adverse pharmacological effects. By contrast, particular foods can aid in the recovery process of a patient. Towards characterizing the nature of food’s influence on pharmacological treatment, it is essential to detect all possible FDIs. In this study, we propose FDMine, a novel systematic framework that models the FDI problem as a homogenous graph. In this graph, all nodes representing drug, food and food composition are referenced as chemical structures. This homogenous representation enables us to take advantage of reported drug-drug interactions for accuracy evaluation, especially when accessible ground truth for FDIs is lacking. Our dataset consists of 788 unique approved small molecule drugs with metabolism-related drug-drug interactions (DDIs) and 320 unique food items, composed of 563 unique compounds with 179 health effects. The potential number of interactions is 87,192 and 92,143 when two different versions of the graph referred to as disjoint and joint graphs are considered, respectively. We defined several similarity subnetworks comprising food-drug similarity (FDS), drug-drug similarity (DDS), and food-food similarity (FFS) networks, based on similarity profiles. A unique part of the graph is the encoding of the food composition as a set of nodes and calculating a content contribution score to re-weight the similarity links. To predict new FDI links, we applied the path category-based (path length 2 and 3) and neighborhood-based similarity-based link prediction algorithms. We calculated the precision@top (top 1%, 2%, and 5%) of the newly predicted links, the area under the receiver operating characteristic curve, and precision-recall curve. We have performed three types of evaluations to benchmark results using different types of interactions. The shortest path-based method has achieved a precision 84%, 60% and 40% for the top 1%, 2% and 5% of FDIs identified, respectively. We validated the top FDIs predicted using FDMine to demonstrate its applicability and we relate therapeutic anti-inflammatory effects of food items informed by FDIs. We hypothesize that the proposed framework can be used to gain new insights on FDIs. FDMine is publicly available to support clinicians and researchers.

scholarly journals Diet Composition and Seasonal Fluctuations in the Feeding Habit of Snow Barbel (Schizothorax plagiostomus) in River Indus, Pakistan

2018 ◽  
Vol 46 (1) ◽  
pp. 8
Author(s):  
Muhammad Qayash Khan ◽  
Muhammad Zubair Anjum ◽  
Shamim Akhter ◽  
Irfan Khattak ◽  
Abid Ali
Keyword(s):  
Diet Composition ◽  
Feeding Activity ◽  
Fish Fauna ◽  
Feeding Habit ◽  
Gut Contents ◽  
Catch Per Unit Effort ◽  
Food Items ◽  
Unit Effort ◽  
Significant Difference ◽  
River Indus

Background:Schizothorax plagiostomus is widely distributed in river Indus and is most important food fish in Pakistan. The feeding habit of fish is directly related to the size of fish, its metabolic rate and environmental temperature. The accurate description of fish diet and feeding habit is a very important aspect in fisheries management for the purpose of species conservation, breeding and culture. The present work was aimed to investigate the specie abundance, the diet composition and seasonal variations in the feeding habit of Snow barbell Schizothorax plagiostomus.Materials, Methods & Results: A total of 1799 fish specimens were caught at the confluence of six tributaries along river Indus at Indus Kohistan, northeastern Pakistan. The fish were collected by 5-panels of gill net during first week of each month. The site specific Catch Per Unit Effort (CPUE) and season specific CPUE of fish fauna were assessed. For the gut content analysis 240 samples (99 male and 141 females) of S. plagiostomus were selected on monthly basis. Frequency of occurrence method and volumetric method were applied to record the different food items in the gut of S. plagiostomus. The physico-chemical parameters, NO3 concentration and dissolved Co2 of water from different localities of river Indus were recorded month wise by Hach sensION 156 meter, Horiba LAQUA Nitrate Meter and EA80 meter respectively. Significant difference was observed in water temperature during the four seasons. Except alkalinity no other water parameter showed significant variation across different localities. The results showed that highest Mean CPUE was observed for Darel Stream (0.55) and lowest for Jalkot stream (0.26). Peak abundance of fish was recorded in the month of November with a mean catch of 44.50, mean CPUE of 0.74 and mean Kruskal-Wallis rank value of 63.25. Spirogyra and Ulothrix occurred as maximum food items in the gut of S. plagiostomus during summer while their minimum amount occurred during autumn. According to the ranking index spirogyra and ulothrix ranked higher with significant difference in comparison to other food items. The results showed that S. plagiostomus is phytophagous in its feeding habit, which consumed mainly algae attached to stones and pebbles during the whole year. However, the presence of some secondary items such as animal matter, detritus, sand and mud might be due to the distinct availabilities of food along the seasons. The highest feeding activity of S. plagiostomus was recorded during summer while the lowest one occurred during autumn, spring and winter. Discussion: Catch per unit effort (CPUE) is an indirect measure of the abundance of a target species. It is used as an index of stock abundance in fisheries and conservation biology. During the study low fish fauna was found in River Indus as reported previously. Majority of the fish occurred in snow fed river tributaries in the study area as these tributaries are comparatively less turbulent. Previous studies have also recorded that Schizothoracine generally prefer clean waters. The present findings of gut contents analysis showed clearly that S. plagiostomus is a phytophagous fish which scrap and consumed spirogyra and ulothrix attached to stones and pebbles. Earlier it was reported that mouth of S. plagiostomusis is inferior, wide, with deep lower jaw having keratinized cutting edge and the lower lip is folded and expanded with numerous papillae making it best suited for scrapping algae attached to stones and pebbles. The highest feeding activity was observed during warmer months as compared to cold months. S. plagiostomus spawn twice in a year in autumn and in spring. The highest feeding activity of S. plagiostomus seems to be link with a reflex of recovery strategy due to physiological process of gonadal development.

scholarly journals Diet composition of the raccoon dog (Nyctereutes procyonoides) and badger (Meles meles) in Czech Republic

2004 ◽  
Vol 52 (1) ◽  
pp. 81-90
Author(s):  
Hana Šuláková
Keyword(s):  
Protected Area ◽  
Diet Composition ◽  
Meles Meles ◽  
Relative Volume ◽  
Food Sources ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Food Items ◽  
Competition For Food ◽  
Frequency Occurrence

Diets of the raccoon dog and badger were studied in the Landscape Protected Area (LPA) Litovelské Pomoraví from 2000 to 2001 by collecting faeces from latrines during March – December every year. The relative volume and frequency occurrence of each food item in the feaces were calculated. Vertebrates and invertebrates constituted the bulk of the raccoon dog diet, while plants and invertebrates were most frequently eaten by the badger. Insecta and Rodentia were important to the raccoon dog, but it also consumed other food items. The raccoon dog was more omnivorous that the badger. Badger fed very frequently on plant material, raccoon dog, instead, frequently ate insects, especially beetles. In conclusion, the diet of the raccoon dog overlaps largely with that of badger, and some competition for food may occur between these species in the LPA Litovelské Pomoraví; however, their preferred food sources differ to some extent, which helps them to avoid competition.

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