Stomach content analyses ofGilchristella aestuariusandHepsetia brevicepsfrom the Swartvlei system and Groenvlei, southern Cape

1982 ◽  
Vol 17 (2) ◽  
pp. 59-66 ◽  
Author(s):  
D.J. Coetzee
Keyword(s):  
Stomach Content ◽  
Content Analyses

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

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

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.

Stomach Contents of New Zealand Inland Shags

1951 ◽  
Vol 2 (2) ◽  
pp. 245 ◽  
Author(s):  
P Dickinson
Keyword(s):  
New Zealand ◽  
Stomach Content ◽  
Stomach Contents ◽  
The State ◽  
Salmonid Fish ◽  
Freshwater Crayfish ◽  
Important Food ◽  
Phalacrocorax Carbo ◽  
Content Analyses ◽  
Food Fish

Twenty-nine stomachs of the large black shag (Phalacrocorax carbo (Linn.)) and 61 of the white-throated or little pied shag (P. brevirostris (Gould)) from the Rotorua-Taupo area were examined. Techniques used to determine the state of digestion and the identification of otoliths are discussed. Stomach content analyses showed that the food of lake-feeding shags in July consisted almost entirely of fish and freshwater crayfish. Bullies (Gobiomorphus sp.) were the most important food fish. Salmonid fish were found in one stomach (P. carbo).

Cannibalism in smooth snakes, Coronella austriaca

2020 ◽  
pp. 168-172
Author(s):  
Gabriela M. Jofré
Keyword(s):  
Body Condition ◽  
Stomach Content ◽  
Faecal Sample ◽  
Animal Species ◽  
Forest Plantations ◽  
Southern England ◽  
Early Autumn ◽  
Faecal Samples ◽  
Content Analyses ◽  
Coronella Austriaca

Cannibalism is a widespread behavioural trait in nature and snakes are no exception. In smooth snakes (Coronella austriaca) it has only been visibly observed in captive individuals or known from faecal/stomach content analyses. Between 2009 and 2018 one incidence of cannibalism, determined from a faecal sample, and one sighting, were recorded in wild smooth snakes in Wareham Forest plantations, UK. Analysis of faecal samples and visual encounter surveys were used to estimate its frequency. Both records occurred in early autumn and our results suggest that its incidence in wild smooth snakes in southern England is low (0.1-0.3 %) and may be the result of low body condition. The circumstances resulting in cannibalism in the smooth snake may also be relevant to other animal species where cannibalism has been reported.

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

A note on the stomach contents of adult Atlantic salmon (Salmo salar, Linnaeus) from Port Burwell, Northwest Territories

1979 ◽  
Vol 57 (7) ◽  
pp. 1502-1503 ◽  
Author(s):  
John D. Neilson ◽  
David J. Gillis
Keyword(s):  
Atlantic Salmon ◽  
Northwest Territories ◽  
Salmo Salar ◽  
Stomach Content ◽  
Stomach Contents ◽  
Range Extension ◽  
Invertebrate Prey ◽  
Content Analyses ◽  
Important Fish ◽  
Prey Items

Stomach content analyses on 28 Atlantic salmon captured at Port Burwell, Northwest Territories, in late August, 1977, indicate that invertebrate prey items were the most important by volume. Parathemisto libellula dominated the invertebrate prey group, and Ammodytes sp. was the most important fish in the diet of the salmon analyzed. A range extension for Notoscopelus elongtus kroeyeri was recorded.

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