Diet composition and prey selection of Telmatobius macrostomus, the Junín giant frog

Diet composition and prey selection of vendace Coregonus albula in the mesotrophic, temperate Lake Ostrowite (Northern Poland)

Oceanological and Hydrobiological Studies ◽

10.2478/v10009-007-0036-z ◽

2008 ◽

Vol 37 (1) ◽

Author(s):

Tomasz Kakareko ◽

Paweł Napiórkowski ◽

Jacek Kozłowski

Keyword(s):

Diet Composition ◽

Prey Selection ◽

Temperate Lake ◽

Coregonus Albula ◽

Northern Poland ◽

Mesotrophic Lake ◽

Selection Of

Diet composition and prey selection of vendaceLake Ostrowite is a mesotrophic lake in Northern Poland 280.7 ha in area and 43 m deep at its deepest point. To study vendace (

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Benefits of being a generalist carnivore when threatened by climate change: the comparative dietary ecology of two sympatric semelparous marsupials, including a new endangered species (Antechinus arktos)

Australian Journal of Zoology ◽

10.1071/zo16044 ◽

2016 ◽

Vol 64 (4) ◽

pp. 249 ◽

Cited By ~ 8

Author(s):

Emma L. Gray ◽

Chris J. Burwell ◽

Andrew M. Baker

Keyword(s):

Climate Change ◽

National Park ◽

Diet Composition ◽

Prey Selection ◽

Pitfall Traps ◽

Dietary Ecology ◽

Late 21St Century ◽

Dietary Components ◽

Abundance And Diversity ◽

Selection Of

The endangered black-tailed dusky antechinus (Antechinus arktos) was described in 2014, so most aspects of its ecology are unknown. We examined diet composition and prey selection of A. arktos and a sympatric congener, the northern form of A. stuartii, at two sites in Springbrook National Park. Overall, taxa from 25 invertebrate orders were identified in the diets from 252 scat samples. Dietary components were similar for each species, but A. arktos consumed a higher frequency and volume of dipteran larvae and Diplopoda, while A. stuartii consumed more Coleoptera, Lepidoptera, Orthoptera and Isopoda. Both species of Antechinus had a higher percentage of ‘empty’ scats (devoid of any identifiable invertebrate material) in 2014 compared with 2015. The former was a drier year overall. Lower rainfall may have reduced abundance and diversity of arthropod prey, causing both species to supplement their diet with soft-bodied prey items such as earthworms, which are rarely detected in scats. Comparison of prey in scats with invertebrate captures from pitfall traps showed both species to be dietary generalists, despite exhibiting distinct preference and avoidance of certain prey categories. The ability of an endangered generalist marsupial to switch prey may be particularly advantageous considering the anticipated effects of climate change on Gondwanan rainforests during the mid-late 21st century.

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Seasonal changes in the diet composition and prey selection of walleye pollock (Theragra chalcogramma) in the northern Gulf of Alaska

Fisheries Research ◽

10.1016/j.fishres.2006.11.032 ◽

2007 ◽

Vol 84 (3) ◽

pp. 378-389 ◽

Cited By ~ 20

Author(s):

Charles F. Adams ◽

Alexei I. Pinchuk ◽

Kenneth O. Coyle

Keyword(s):

Seasonal Changes ◽

Diet Composition ◽

Prey Selection ◽

Gulf Of Alaska ◽

Walleye Pollock ◽

Theragra Chalcogramma ◽

Walleye Pollock Theragra Chalcogramma ◽

Selection Of

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Foraging Decisions of Sandwich Terns in the Presence of Kleptoparasitising Gulls

The Auk ◽

10.1093/auk/119.2.473 ◽

2002 ◽

Vol 119 (2) ◽

pp. 473-486

Author(s):

Eric W. M. Stienen ◽

Alex Brenninkmeijer

Keyword(s):

Diet Composition ◽

Prey Selection ◽

Food Shortage ◽

Larus Ridibundus ◽

Foraging Decisions ◽

Food Losses ◽

Sterna Sandvicensis ◽

The 1960S ◽

Potential Food ◽

Selection Of

AbstractWe studied prey selection of Sandwich Terns (Sterna sandvicensis) in the presence of kleptoparasitising Black-headed Gulls (Larus ridibundus) on Griend, Dutch Wadden Sea, from 1992 to 1998. Most often, gulls robbed larger sandeels rather than herring from terns. Provided that one parent attends the chick, energy intake would be too low for the chicks' survival if exclusively fed on sandeel. By provisioning an increasing proportion of herring, parent terns could theoretically overcome a potential food shortage when the chicks grow older. However, the proportion of herring did not increase with age of chicks in most years. Instead, parents increased their foraging effort with the growth of their offspring. In years with high proportions of food loss, parents left their chicks unattended at the nest more often. In that way, parents were largely able to counterbalance food shortage of offspring. In 1992 and 1996, when diet composition was unfavorable and food losses to gulls were high, parents left their chicks unattended at the nest for ∼80% of the daylight period. It is argued that the present working level of parents might be higher than in the 1960s.

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Diet composition and prey selection of the pike,Esox lucius, in Çivril Lake, Turkey

Journal of Applied Ichthyology ◽

10.1111/j.1439-0426.2008.01119.x ◽

2008 ◽

Cited By ~ 2

Author(s):

A. Alp ◽

V. Yeğen ◽

M. Apaydin Yağci ◽

R. Uysal ◽

E. Biçen ◽

...

Keyword(s):

Diet Composition ◽

Prey Selection ◽

Esox Lucius ◽

Pike Esox Lucius ◽

Selection Of

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Prey species and prey selection of dholes at three different sites in Thailand

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d211128 ◽

2020 ◽

Vol 21 (11) ◽

Author(s):

KHWANRUTAI CHARASPET ◽

Ronglarp - Sukmasuang ◽

NORASET KHOEWSREE ◽

MANANYA PLA-ARD ◽

YUWALUK CHANACHAI

Keyword(s):

National Park ◽

Prey Species ◽

Dietary Diversity ◽

Prey Selection ◽

Selection Index ◽

Camera Traps ◽

Total Biomass ◽

Wildlife Sanctuary ◽

Khao Yai National Park ◽

Selection Of

Abstract. Charaspet K, Sukmasuang R, Khoewsree N, Pla-ard M, Chanachai Y. 2020. Prey species and prey selection of dholes at three different sites in Thailand. Biodiversitas 21: 5248-5262. The study of prey species and prey selection of Dholes at 3 different sites was conducted at Khao Yai National Park, Salak Pra, and Huai Kha Khaeng Wildlife Sanctuaries from 2013 to 2020. Information on Dhole prey at the sites was collected from the residues of dhole scats, from which the selection index, the relative biomass of the prey, and the relative amounts of the consumed prey were calculated. The data were collected simultaneously with the use of camera traps at each site. The study revealed that there were 13 species of Dhole prey with body weight over 5 kg. The result indicated that there were 7 species of even-toed ungulates. The relative biomass of even-toed ungulates ranged between 76.78 - 90.50% of the total biomass of all the Dholes’ consumed prey for all study sites. The dietary diversity index unveiled a similar index in all areas, which proved the adequacy of the analyzed scats. However, the Niche breadth index, which indicates the relevance of prey selection and prey species to the appearances of the prey at each site, was found to be high at Huai Kha Khaeng Wildlife Sanctuary, Khao Yai National Park, while the index was found to be low at Salak Pra Wildlife Sanctuary. The results revealed that Dholes consumed viverrid species and Malayan porcupine more often at the site where there were large carnivores. The recommendation from this study was the conservation and restoration of the ungulate populations, the main prey, as it greatly affects the conservation of the Dhole populations in Thailand. Grassland and salt lick sites, water sources improvements are also important to promote prey population. The conservation of wildlife prey by releasing them to nature, as currently conducted, has an effect on the increase of Dholes’ prey species.

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Intrinsic Prey Preference and Selection of the Giant Gartersnake: A Threatened Predator in a Nonnative Prey-Dominated Community

Journal of Fish and Wildlife Management ◽

10.3996/062019-jfwm-051 ◽

2020 ◽

Vol 11 (1) ◽

pp. 164-173

Author(s):

Julia S.M. Ersan ◽

Brian J. Halstead ◽

Erica L. Wildy ◽

Michael L. Casazza ◽

Glenn D. Wylie

Keyword(s):

Exotic Species ◽

Native Species ◽

Prey Selection ◽

Central Valley ◽

Prey Preference ◽

Live Prey ◽

Species Of Conservation Concern ◽

Conservation Concern ◽

Behavioral Trials ◽

Selection Of

Abstract The introduction of exotic species into an environment can introduce great change in the trophic dynamics of native species. This is of even greater concern if the native species is of conservation concern. The giant gartersnake, Thamnophis gigas, an endemic predator of the Central Valley of California and a species of conservation concern at the state and federal levels, has declined as a result of conversion of its once vast wetland habitat to agriculture. Another anthropogenic factor contributing to this snake's changing ecology is the introduction of nonnative prey into the species' habitats. These introductions have resulted in a prey community that is almost completely composed of exotic species and have potential for considerable effects. In order to assess prey preference and selection we performed three sets of behavioral trials on naïve neonates. We examined 1) neonate prey preference in response to olfactory cues of prepared prey extracts, 2) neonate consumption of different live prey items presented simultaneously; and 3) terrestrial feeding behavior and/or latency to successful attack. Results from the olfactory study suggest that native Sierran treefrogs, Pseudacris sierra, are preferred by neonates. Results from consumption trials suggest that neonates are more likely to select frog species than fish species. This is the first study that we are aware of that examines prey selection of this threatened species and serves to inform its conservation and management.

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Feeding Ecology of Short-Toed Snake-Eagle (Circaetus gallicus [Gmelin, 1788]) in the Montados of Iberian Peninsula

Silva Lusitana ◽

10.1051/silu/20202802139 ◽

2020 ◽

Vol 28 (2) ◽

pp. 155-179

Author(s):

Nuno Onofre ◽

Luís Sampaio

Keyword(s):

Relative Abundance ◽

Diet Composition ◽

Prey Species ◽

Prey Selection ◽

Prey Type ◽

Generalist Predator ◽

Important Prey ◽

Psammodromus Algirus ◽

Circaetus Gallicus ◽

Water Snakes

The diet of Short-toed Snake-eagle (Circaetus gallicus) during the breeding season in an area dominated by cork and holm oak parkland forests (Montados) was analyzed in this study. As expected, results showed that snakes are the dominant prey in the diet of this eagle, comprising up to 92.5% of the identified items, if potential secondary prey species were excluded. The Montpellier Snake (Malpolon monspessulanus) was the most consumed one (42.2%), followed by the Ladder Snake (Zamenis scalaris) (28.0%), and the water snakes (Natrix spp.) (14.2%). According to the same criteria, lizards (mainly Psammodromus algirus) and mammals represent between 4.8 and 2.2%, respectively. Other animals such as pond turtle and amphibians are irregular prey (<1%), and no bird remains were found at all. Short-toed Snake-eagle is usually referred as a stenophagic predator where snakes are by far its most important prey type, and where within this taxonomic group it behaves as a generalist predator. In this study this premise was then tested comparing the relative abundance of the snake species with their proportion in the diet composition of the eagle in order to know whether or not prey selection exists with regard to the species of snakes in this region. Results point to a quite plausible "preference" for the Ladder Snake and an "avoidance" for the smooth snakes group (Macroprotodon brevis/Coronella girondica), and possibly for the Horseshoe Whip (Hemorrhois hippocrepis). The avoidance to the Horseshoe Whip must be indirect and habitat related, while in relation to the two smooth snakes it may be due in large extend to its small size, in particular.

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