Stable isotopes and stomach content analyses indicate omnivorous habits and opportunistic feeding behavior of an invasive fish

2019 ◽  
Vol 53 (3) ◽  
pp. 365-381
Author(s):  
Débora Reis de Carvalho ◽  
Diego Marcel Parreira de Castro ◽  
Marcos Callisto ◽  
Antônio Júlio de Moura Chaves ◽  
Marcelo Zacharias Moreira ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Feeding Behavior ◽  
Stomach Content ◽  
Invasive Fish ◽  
Content Analyses ◽  
Opportunistic Feeding

scholarly journals Spatial diet overlap and food resource in two congeneric mullet species revealed by stable isotopes and stomach content analyses

2018 ◽  
Vol 19 (2) ◽  
pp. 116-124 ◽  
Author(s):  
A.F.S. Garcia ◽  
A.M. Garcia ◽  
S.R. Vollrath ◽  
F. Schneck ◽  
C.F.M. Silva ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stomach Content ◽  
Food Resource ◽  
Diet Overlap ◽  
Content Analyses

Effects of large lake trout (Salvelinus namaycush) on the dietary habits of small lake trout: a comparison of stable isotopes (δ15N and δ13C) and stomach content analyses

Hydrobiologia ◽  
2006 ◽  
Vol 579 (1) ◽  
pp. 175-185 ◽  
Author(s):  
Matthew D. Keyse ◽  
Kenneth Fortino ◽  
Anne E. Hershey ◽  
W. John O’Brien ◽  
Philip W. Lienesch ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stomach Content ◽  
Dietary Habits ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Large Lake ◽  
Small Lake ◽  
Content Analyses ◽  
Δ15n And Δ13c

Opportunistic feeding by desert bats (Myotis spp.)

1976 ◽  
Vol 54 (4) ◽  
pp. 526-530 ◽  
Author(s):  
M. B. Fenton ◽  
G. K. Morris
Keyword(s):  
Feeding Behavior ◽  
Food Resources ◽  
Selective Feeding ◽  
Insectivorous Bats ◽  
Black Light ◽  
Opportunistic Feeding

By using a 'black light' and playback of sounds made by foraging insectivorous bats, we examined opportunistic feeding behavior of bats near Camp Verde, Arizona, between 1 and 10 June 1975. Bats were significantly most active during 15-min periods when the light was on and insects were aggregated over it. Bats feeding over the light selectively pursued and captured larger insects, apparently ignoring the smaller ones. Bats did not respond to sounds simulating feeding buzzes of bats, but showed a slight response to the foraging sounds of other bats. Opportunistic feeding by insectivorous bats allows effective exploitation of patchily distributed food resources and can lead to selective feeding when 'hatches' of insects are involved. Opportunistic feeding is not incompatible with selective feeding, and may eventually be established as a strategy common to most insectivorous bats.

Effects of Cage Culture on Growth, Abundance, and Survival of Resident Largemouth Bass (Micropterus salmoides)

1978 ◽  
Vol 35 (1) ◽  
pp. 157-160 ◽  
Author(s):  
Raj V. Kilambi ◽  
James C. Adams ◽  
William A. Wickizer
Keyword(s):  
Stomach Content ◽  
Ictalurus Punctatus ◽  
Largemouth Bass ◽  
Condition Factor ◽  
Micropterus Salmoides ◽  
Lepomis Macrochirus ◽  
Salmo Gairdneri ◽  
Cage Culture ◽  
Content Analyses ◽  
Culture Growth

Growth, population size, and survival of resident largemouth bass (Micropterus salmoides) were estimated before, during, and after the cage culture of Salmo gairdneri and Ictalurus punctatus. Growth in length, length–weight relationship, and condition factor were similar among the periods; however, abundance and survival of largemouth bass increased through the 3 yr of investigation. Stomach content analyses showed that the bass fed on fishes (mostly Lepomis macrochirus), crayfish, insects, and zooplankton (predominantly entomostracans). Increase in the standing crops of L. macrochirus and entomostracans during the study periods have provided forage to the increased bass population and thus resulted in greater survival of the young and adult bass of the cage culture and postcage culture periods. Key words: largemouth bass, Micropterus salmoides, cage culture, growth, abundance, survival

Feeding ecology and basal food sources that sustain the Paradoxal frog Pseudis minuta: a multiple approach combining stomach content, prey availability, and stable isotopes

Hydrobiologia ◽  
2014 ◽  
Vol 740 (1) ◽  
pp. 253-264 ◽  
Author(s):  
Sonia Huckembeck ◽  
Daniel Loebmann ◽  
Edelti F. Albertoni ◽  
Sonia M. Hefler ◽  
Mauro C. L. M. Oliveira ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stomach Content ◽  
Feeding Ecology ◽  
Prey Availability ◽  
Food Sources ◽  
Multiple Approach ◽  
Pseudis Minuta

scholarly journals Dieta de hemidactylus frenatus (sauria: gekkonidae) en un área urbana de la región Caribe colombiana

2012 ◽  
Vol 28 (3) ◽  
Author(s):  
Jorge A. Díaz Pérez ◽  
Juan A. Davila Suárez ◽  
Deivys M. Alvarez García ◽  
Alcides C. Sampedro Marín
Keyword(s):  
Urban Area ◽  
Stomach Content ◽  
Feeding Pattern ◽  
Caribbean Region ◽  
Importance Value Index ◽  
Importance Value ◽  
Hemidactylus Frenatus ◽  
Opportunistic Feeding

The aim of this work was to study the diet of Hemidactylus frenatus in an urban area of Colombian Caribbean region. Twenty five specimens were captured on human edifications at the Sincelejo municipality (Sucre). After dissection and analysis of the stomach content, we identify 12 prey groups being Hemiptera the item with the highest importance value index (IVI = 152.7). The data shows a generalist and opportunistic feeding pattern, feeding mainly on arthropods.

Aggregation of mummified adult crabeater seals (Pinnipedia: Phocidae) in the eastern Antarctic Peninsula: age and sex structure, taphonomy and cause of death

2014 ◽  
Vol 27 (3) ◽  
pp. 274-280 ◽  
Author(s):  
Javier Negrete ◽  
Leopoldo h. Soibelzon ◽  
Esteban Soibelzon ◽  
María E.I. Márquez ◽  
Cleopatra M. Loza ◽  
...  
Keyword(s):  
Stomach Content ◽  
Age And Gender ◽  
Sex Structure ◽  
Mass Mortality Event ◽  
Content Analyses ◽  
Crabeater Seals ◽  
And Gender ◽  
Natural Trap ◽  
Seymour Island ◽  
Age And Sex

AbstractIn Antarctica, crabeater seals tend to strand as immature animals with disorientation, due to their inexperience, given as the probable cause. In 2012 and 2013, we examined a group of 80 mummified crabeater seals on Seymour Island (Marambio). The age and gender of 28 seals was determined, and virology and stomach content analyses were performed in order to determine the cause of stranding. Around 82% of the seals examined were adults and 79% were females, some of which were pregnant. All of the seals sampled tested negative for Morbillivirus, suggesting that the stranding was not related to the mass mortality event reported in the 1950s in the region. Most seals had empty stomachs and thin blubber suggesting that they died from starvation. The state of the carcasses suggests multiple stranding events. Most of the seals were located along an ice-covered stream, suggesting that this may act as a ‘natural trap’, isolating the seals from the open ocean. This is exceptional as it is the first report of mostly adult female seals to strand in Antarctica and refutes the theory that only young animals are prone to stranding.

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