scholarly journals Cannibalism as the main feeding behaviour of tucunares introduced in Southeast Brazil

2004 ◽  
Vol 64 (3b) ◽  
pp. 625-632 ◽  
Author(s):  
L. M. Gomiero ◽  
F. M. S. Braga
Keyword(s):  
Feeding Behaviour ◽  
Food Item ◽  
Main Food ◽  
Southeast Brazil ◽  
Main Food Item

Individuals of its own genus were the main food item of two species of tucunares (Cichla cf. ocellaris and Cichla monoculus) introduced into the Volta Grande Reservoir. The abundance of adult tucunares may cause intra-specific competition, possibly leading to the high cannibalism rates found.

Ecology of a Speleomantes ambrosii population inhabiting an artificial tunnel

1994 ◽  
Vol 15 (1) ◽  
pp. 35-45 ◽  
Author(s):  
Federico Melodia ◽  
Sebastiano Salvidio ◽  
Maria Tavano ◽  
Mauro Valerio Pastorino ◽  
Aldo Lattes
Keyword(s):  
Spatial Distribution ◽  
Home Range ◽  
Food Item ◽  
Food Abundance ◽  
Main Food ◽  
Juvenile Recruitment ◽  
Microhabitat Heterogeneity ◽  
Nw Italy ◽  
Main Food Item

AbstractA Speleomantes ambrosii population living in an artificial tunnel in NW Italy was studied for two consecutive years. Activity on the walls varied cyclically in relation to seasonal temperatures and food abundance. The main food item was the trogloxenic dipteran Limonia nubeculosa, which accounted for more than 80% of the total ingested prey by volume. Juvenile cave salamanders had a broader trophic nich than adults. Oviposition and juvenile recruitment appeared to be seasonal. The spatial distribution inside the tunnel was related to microhabitat heterogeneity and particularly to the distance from the entrance. Juveniles were observed outside or close to the entrance more often than adults. Movement of adult salamanders were generally low and averaged 7 cm/day; some repeatedly recaptured individuals had a mean home range of 6 m2.

The Diet of Rattus Lutreolus and Five Other Rodents in Southern Victoria.

1978 ◽  
Vol 5 (1) ◽  
pp. 47 ◽  
Author(s):  
CHS Watts ◽  
RW Braithwaite
Keyword(s):  
Mus Musculus ◽  
Plant Material ◽  
Food Item ◽  
Main Food ◽  
Coastal Heath ◽  
Autumn And Winter ◽  
Staple Diet ◽  
Main Food Item

Faeces were studied during 1 to 3 years for rodents live-trapped in 7 areas of Victoria. Diet changed with season for all 6 species studied. In general the staple diet of Rattus lutreolus was basal stem and young rhizome of monocotyledons, probably sedge, and of R. rattus was fungus. Fungus was a main food item for most species and places, especially in winter. Some was basidiomycete but by far the most, especially for R. rattus on coastal heath, was an underground phycomycete tentatively identified as Endogone incrassata. R. fuscipes ate various foods, mainly seeds, insects, fungus and fibrous plant material, whatever was seasonally abundant. Mus musculus ate mostly insects for most of the year, though it is usually considered granivorous and seed was available in summer. Only in June and July were insects less than half the value of food eaten. Pseudomys novaehollandiae ate many foods and almost no insects, but the sample of mice was too small to allow a general conslusion. P. shortridgei ate grass and fungus in autumn and winter but more variety in spring and summer, including flowers, seeds and insects.

scholarly journals The length and weight relationships and feeding ecology of knout goby, Mesogobius batrachocephalus (Pallas, 1814) from Southern Black Sea

2020 ◽  
Vol 37 (4) ◽  
pp. 409-414
Author(s):  
Elizabeth Grace Tunka Bengil ◽  
Mehmet Aydın
Keyword(s):  
Black Sea ◽  
Trophic Level ◽  
Feeding Ecology ◽  
Food Item ◽  
Niche Breadth ◽  
The Black Sea ◽  
Teleost Fishes ◽  
Main Food ◽  
Weight Relationship ◽  
Main Food Item

Among ecologically diverse gobies species, knout goby, Mesogobius batrachocephalus (Pallas, 1814), or previously known as Gobius batrachocephalus, is a Black Sea endemic species. There are studies on this species biological features along the Black Sea but there are only studies on its length and weight relationship along the Turkish coasts of the Black Sea. This study aims to contribute to the lack of knowledge on knout goby length and weight relationship and feeding ecology inhabiting Southern Black Sea. Total of 470 individual of knout goby was collected and it was previously reported that knout goby shows negative (-) allometry though within this study it was found that it only shows negative (-) allometry in spring and positive (+) allometry in other seasons. The diet was composed of crustaceans, teleost fishes and gastropods. According to the relative importance analysis, teleost fishes are the main food item for all and male individuals but for female crustaceans are the main food item. Trophic level results show that for all individuals trophic levels is 4.34, and when sexes are compared females have higher trophic level than males. While both sexes only consume teleost during summer, in other seasons females prefer more crustacean in their diet compared to males. Niche breadth index results indicated that when all individuals diet was compared among seasons in winter the niche breadth was the broader and summer was the narrower, in case of females the broader was fall and for males it was winter. In conclusion, feeding ecology of knout goby changes between seasons and sexes but general prey groups remain the same

ADDITIONS TO THE TAXONOMY, ZOOGEOGRAPHY, AND BIOLOGY OF ANALETRIS EXIMIA (ACANTHAMETROPODINAE: SILPHLONURIDAE: EPHEMEROPTERA)

1976 ◽  
Vol 108 (2) ◽  
pp. 199-207 ◽  
Author(s):  
D. M. Lehmkuhl
Keyword(s):  
Adult Male ◽  
Food Item ◽  
River System ◽  
Habitat Destruction ◽  
Male And Female ◽  
Main Food ◽  
Main River ◽  
River Current ◽  
Main Food Item

AbstractThe previously undescribed adult male and female of Analetris eximia Edmunds are treated. Additional features of nymphs are illustrated. In the Saskatchewan River system the species is found in areas unaffected by reservoirs; nymphs develop in May?, June, and July; adults emerge in late July. Nymphs are carnivorous (chironomids were the main food item in field collected specimens), live in backwaters adjacent to the main river current, and are morphologically adapted to life on an unstable silty substrate. Invasion of the Saskatchewan system was apparently via Missouri tributaries from the Colorado system. It occurred in recent times in the latter but apparently not the former. Because of habitat destruction, the species is considered endangered.

scholarly journals Feeding habits of Stellifer rastrifer (Perciformes, Sciaenidae) at Guaratuba mangrove, Parana, Brazil

1998 ◽  
Vol 41 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Paulo de Tarso C. Chaves ◽  
Ana Lúcia Vendel
Keyword(s):  
Feeding Behaviour ◽  
Food Item ◽  
Feeding Habits ◽  
Fish Populations ◽  
The Individual ◽  
High Level ◽  
Individual Size

Feeding habits of Stellifer rastrifer (Perciformes, Sciaenidae) at Guaratuba mangrove, Parana, Brazil, were studied from February 1996 to February 1997. It was observed that its diet was based on invertebrates, mainly Decapoda non-Brachyura and Polychaeta. In a smaller proportion there were plants, Copepoda, Gammaridea and Mollusca. The level of contribution of each food item changed according to the season and the individual size. Such plasticity in feeding behaviour was similar to that described to some fish populations from other estuaries, and could be an indicator of the high level of instability presented by this kind of ecosystem.

Feeding behaviour of the yellow-bellied glider (Petaurus australis) at the western edge of its range

1999 ◽  
Vol 26 (2) ◽  
pp. 199 ◽  
Author(s):  
Susan M. Carthew ◽  
Ross L. Goldingay ◽  
Darryl L. Funnell
Keyword(s):  
Sap Flow ◽  
Feeding Behaviour ◽  
Food Item ◽  
Food Resource ◽  
Geographic Range ◽  
Important Food ◽  
Ecological Requirements ◽  
South West ◽  
Petaurus Australis ◽  
Important Food Item

This study provides the first assessment of the diet of the yellow-bellied glider (Petaurus australis) in the south-west portion of its range near the Victorian–South Australian border. Examining its diet in this region is viewed as being fundamental to understanding the ecological requirements of the species. Observations were conducted over a five-year period on gliders from five distinct groups. Sap was the most important food item throughout the year and accounted for 83% of 407 feeding observations. Each group of gliders used up to 21 different trees for sap, but during any sample period only 1–8 trees were used. This represents a vastly different pattern of use of sap trees to that described in any earlier study. Some trees were visited more often than others, and these tended to be heavily scarred, indicating use over many years. Other food types were arthropods and honeydew and, to a lesser extent, nectar. This study also revealed that the yellow- bellied glider is not dependent on a diversity of tree species nor on a winter-flowering species. We provide a review of the diet of the yellow-bellied glider throughout its range. This shows that the yellow-bellied glider is reliant on sap as a food resource but particularly so at both ends of its geographic range. The reason for this is unclear, but there is definitely a need for further study of sap-flow patterns in eucalypts.

Diet composition and foraging activity of Pipistrellus pygmaeus in a floodplain forest

Biologia ◽  
2008 ◽  
Vol 63 (2) ◽  
Author(s):  
Tomáš Bartonička ◽  
Zdeněk Řehák ◽  
Michal Andreas
Keyword(s):  
Diet Composition ◽  
Food Item ◽  
Late Pregnancy ◽  
Floodplain Forest ◽  
Foraging Activity ◽  
Forest Sites ◽  
On Line ◽  
Line Transects ◽  
Taxonomic Groups ◽  
Main Food Item

AbstractIn 2000–2002 bat droppings were collected under the emerging crevice of a nursery colony of Pipistrellus pygmaeus. The locality was situated in a floodplain forest at the confluence of the Dyje and Morava rivers (S Moravia, Czech Republic). In total, 27 samples (20 pellets in one sample) of droppings were used to analyze prey remains. In the diet, 40 taxonomic groups of invertebrates were found. As expected, small dipteran insects were the main food item in which Nematocera dominated. Besides Chironomidae and Ceratopogonidae also a high percentage of nematoceran eggs were recorded. Surprisingly, a relatively high percentage of Brachycera was recorded. Further frequent prey items belonged to the orders of Trichoptera, Hymenoptera, Coleoptera and Sternorrhyncha. A heterodyne bat detector was used to follow foraging activity of P. pygmaeus on line transects in forest and water habitats in the vicinity of the colony. A significant decrease in foraging activity over water habitats and in forest sites during the late pregnancy (mid-May — early June) and an increase during the lactation and post-lactation periods (mid-June — early August) were found. Changes in the frequency of occurrence of Chironomidae, Neuroptera, Trichoptera, Aphidinea and Simuliidae were correlated with the bats’ foraging activity.

siphon nipping of the bivalve amiantis purpurata by the electric ray discopyge tschudii in mar del plata, argentina

2005 ◽  
Vol 85 (5) ◽  
pp. 1151-1154 ◽  
Author(s):  
florencia arrighetti ◽  
juan pablo livore ◽  
pablo e. penchaszadeh
Keyword(s):  
Frequency Distribution ◽  
Stomach Content ◽  
Shell Length ◽  
Food Item ◽  
Local Population ◽  
Stomach Contents ◽  
Size Frequency Distribution ◽  
Clam Population ◽  
Discopyge Tschudii ◽  
Main Food Item

a total of 67 discopyge tschudii was captured. individuals were sexed, measured and their stomach content analysed. siphon tips of the bivalve amiantis purpurata from each stomach were individually counted, weighed and their length and width measured. the size–frequency distribution of the local population of a. purpurata was surveyed for two years. siphons of a. purpurata were the main food item in 90% of individuals having stomach contents. the clam population was markedly bimodal, with 24 mm and 46 mm mean shell length for the younger and older size-classes, respectively. grazing by d. tschudii on a. purpurata varied with size and sex of the fish. small rays mainly ingested small siphons and large rays large siphons. nipped siphon tips were longer in male than in female rays.

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.

Diversity of feeding strategies in adult Mecoptera

2010 ◽  
Vol 3 (2) ◽  
pp. 111-128 ◽  
Author(s):  
Christopher Palmer
Keyword(s):  
Feeding Behaviour ◽  
Food Item ◽  
Food Source ◽  
Food Sources ◽  
Feeding Strategies ◽  
Natural Habitats ◽  
Nuptial Feeding ◽  
Plant Feeding ◽  
Laboratory Investigations ◽  
Head Morphology

AbstractIn this article I review the diet and feeding behaviour of adult scorpionflies in the nine extant families. Members of the Apteropanorpidae and Panorpidae are saprophagous on dead and decaying invertebrates, and the only known eomeropid Notiothauma reedi is also saprophagous on animal matter. Bittacids are predacious on a variety of invertebrates, predominantly insects. Both bittacids and panorpids supplement their diet with a variety of food sources such as nectar, and members of the Nannochoristidae most likely utilise nectar as the primary food source. Adult Panorpodidae are phytophagous, and all species of Boreidae are also regarded as phytophagous, although feeding on invertebrate carrion has also been reported for this family. The diets of the Meropeidae and Choristidae in natural habitats are unknown, although choristids may be saprophagous based on laboratory investigations. Nuptial feeding is a feature of the Bittacidae and Panorpidae, whereby the male provides the female with a food item as a prelude to or during courtship, and the female feeds on it during copulation. Relating head morphology to known diets indicates some patterns. The rostrum is more elongate in those taxa known to feed predominantly on animal matter, and shorter and wider in plant-feeding taxa such as the Panorpodidae. An exception is the predominantly phytophagous Boreidae, in which most species have a long rostrum.

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