scholarly journals Food Habits of the Endemic Long Legged Wood Frog, Rana Pseudodalmatina (Amphibia, Ranidae), in Northern Iran

2016 ◽  
Vol 50 (4) ◽  
pp. 363-368
Author(s):  
M. Najibzadeh ◽  
A. Gharzi ◽  
N. Rastegar-Pouyani ◽  
E. Rastegar-Pouyani ◽  
A. Pesarakloo
Keyword(s):  
Stomach Content ◽  
Food Habits ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Food Habit ◽  
Wood Frog ◽  
Hyrcanian Forest ◽  
Northern Iran ◽  
Frog Species ◽  
Prey Items

Abstract Iranian long legged wood frog, Rana pseudodalmatina Eiselt & Schmidtler, 1971 is a brown frog species endemic to the Hyrcanian forest. The objective of the present study is to collect detailed information on the feeding habits of 44 specimens of this species (24 ♂, 20 ♀) by analyzing the stomach contents of individuals from 10 populations inhabiting range. The food habit of R. pseudodalmatina generally varies by the availability of surrounding prey items, and it is a foraging predator, the food of which consists largely of Coleoptera (mainly Carabidae, Dytiscidae and Haliplidae), Diptera (Muscidae) and Hymenoptera (Formicidae), and no difference was found between females and males in the stomach content.

Feeding habits of the short-finned squidIllex coindetiiin the western Mediterranean Sea using combined stomach content and isotopic analysis

2015 ◽  
Vol 96 (6) ◽  
pp. 1235-1242 ◽  
Author(s):  
Francisco Martínez-Baena ◽  
Joan Navarro ◽  
Marta Albo-Puigserver ◽  
Isabel Palomera ◽  
Rigoberto Rosas-Luis
Keyword(s):  
Mediterranean Sea ◽  
Stomach Content ◽  
Feeding Habits ◽  
Western Mediterranean ◽  
Trophic Levels ◽  
Mesopelagic Fish ◽  
Western Mediterranean Sea ◽  
Isotopic Analyses ◽  
Stable Isotopic ◽  
Prey Items

The ommastrephid squid,Illex coindetii, is one of the most abundant cephalopods in the Mediterranean Sea and an important predator in the ecosystem. In the present study, we examined the diet habits ofI. coindetiiin the north-western Mediterranean Sea by combining two complementary approaches: stomach content and stable isotopic analyses. Specifically, we examined whether the diet differed between sizes and seasons. Stomach content results indicated that the diet ofI. coindetiiwas composed of 35 prey items including four major groups; namely the crustaceansPasiphaea sivado, Amphipods, squid of the Order Teuthida, and pelagic and mesopelagic fish. Differences were found among different ontogenetic sizes: juvenile individuals fed mainly on crustaceans (%IRI = 77.59), whereas adult individuals fed on a wider range of prey items, including the shrimpP. sivado(%IRI = 33.21), the amphipodAnchylomera blossevillei(%IRI = 0.91), the decapodPlesionikasp. (%IRI = 0.19), the carangidTrachurus trachurus(%IRI = 0.34) and some Myctophids species (%IRI = 0.21). Differences were also found between seasons in the year. In winter, crustaceans were the main prey items, whereas in summer the diversity of prey was higher, including fish, crustaceans and molluscs. Similar to the stomach contents, stable isotopic results indicated differences among sizes. δ15N values were higher in adult squids than in juveniles because they fed on prey at higher trophic levels. In conclusion, this study indicates that feeding habits ofI. coindetiivary seasonally and ontogenetically. These feeding variations may be associated with trophic competence scenarios based on size, and also with the availability and abundance of prey throughout the year.

scholarly journals Gluttonous predators: how to estimate prey size when there are too many prey

2008 ◽  
Vol 68 (2) ◽  
pp. 315-320 ◽  
Author(s):  
MS. Araújo ◽  
A. Pinheiro ◽  
SF. Reis
Keyword(s):  
Prey Size ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Sampling Effort ◽  
High Intake ◽  
Precision Error ◽  
Bootstrap Procedure ◽  
Future Studies ◽  
Large Numbers ◽  
Prey Items

Prey size is an important factor in food consumption. In studies of feeding ecology, prey items are usually measured individually using calipers or ocular micrometers. Among amphibians and reptiles, there are species that feed on large numbers of small prey items (e.g. ants, termites). This high intake makes it difficult to estimate prey size consumed by these animals. We addressed this problem by developing and evaluating a procedure for subsampling the stomach contents of such predators in order to estimate prey size. Specifically, we developed a protocol based on a bootstrap procedure to obtain a subsample with a precision error of at the most 5%, with a confidence level of at least 95%. This guideline should reduce the sampling effort and facilitate future studies on the feeding habits of amphibians and reptiles, and also provide a means of obtaining precise estimates of prey size.

scholarly journals Food habits of endemic opudi fish (Telmatherina prognatha, Kottelat 1991) in Matano Lake, South Sulawesi, Indonesia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Chadijah Andi ◽  
Sulistiono ◽  
Ridwan Affandi ◽  
Gadis Sri Haryani ◽  
Ali Mashar
Keyword(s):  
Stomach Content ◽  
Food Habits ◽  
Stomach Contents ◽  
Mesh Size ◽  
Fish Analysis ◽  
South Sulawesi ◽  
Endemic Fish

Abstract. Chadijah A, Sulistiono, Affandi R, Haryani GS, Mashar A. 2020. Food habits of endemic opudi fish (Telmatherina prognatha, Kottelat 1991) in Matano Lake, South Sulawesi, Indonesia. Biodiversitas 21: 1373-1378. The opudi fish (Telmatherina prognatha) is endemic fish in Matano Lake, South Sulawesi. This study aims to analyze food habits of the opudi fish. This study was conducted from March 2018 to February 2019 in the Matano Lake at six sampling sites in Lawa River, Wotu pali, Salonsa Beach, Utuno, Petea River, and Tanah Merah. The sampling was taken using bag nets with 0.5 inches of mesh size. Food observation was carried out by examining the stomach of the fish. Analysis of the diet includes index stomach content (ISC), occurrent frequency and index of preponderance (IP). The fish was consisted of 687 males and 478 females. Stomach contents of the fish consisted of three kinds of foods such part of insect, debris and plankton. IP for male consisted of part of insect (58%), debris (13%), and plankton (Nitzschia sp. Eunotia sp. 11%). IP for female consisted of part of insect (33%), Navicula sp. and debris (17%), followed by Nitzschia sp. (13%).

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.

scholarly journals Feeding habits of the american crocodile, crocodylus acutus (cuvier, 1807) (reptilia: crocodylidae) in the Southern Coast of Quintana Roo, México

2008 ◽  
Vol 24 (3) ◽  
Author(s):  
Alejandro Villegas ◽  
Juan Jacobo Schmitter-Soto
Keyword(s):  
Body Size ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Quintana Roo ◽  
Southern Coast ◽  
Crocodylus Acutus ◽  
American Crocodile ◽  
Volume Method ◽  
Prey Items

Between January and September 2006, 21 crocodiles (Crocodylus acutus) were captured and six were recaptured in four lagoons located in the southern coast of Quintana Roo. Stomach contents were obtained in order to identify prey items, which were analyzed by the frequency and volume method. In decreasing order of importance, prey items were fish, crustaceans, birds, mammals and insects. Diet of crocodiles changed considerably according to their body size. Adult crocodiles added larger preys (birds and mammals) to their diet; fish and crustaceans were present in the diet at all sizes, thus showing theimportance of these prey in the diet of American crocodiles.

Diel Feeding Chronology and Diet Selection of Rainbow Trout (Oncorhynchus mykiss) in the Henry's Fork of the Snake River, Idaho

1990 ◽  
Vol 47 (1) ◽  
pp. 199-209 ◽  
Author(s):  
T. R. Angradi ◽  
J. S. Griffith
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Stomach Content ◽  
Decision Rules ◽  
Stomach Contents ◽  
Live Weight ◽  
Invertebrate Drift ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Terrestrial Insects ◽  
Prey Items

Concurrent rainbow trout (Oncorhynchus mykiss) stomach contents and invertebrate drift samples were collected during three 24-h periods in summer 1987. Feeding was discontinuous through the day on all dates. Mean stomach content weight was minimal after 0400 MST and sharply increased between 1000 and 1200 MST on all three dates. Feeding apparently did not occur after twilight. Mean stomach content weight was correlated with water temperature on two dates and was never correlated with invertebrate drift density for non-age-0 trout. Daily ration (wet weight) was 7% of live weight for non-age-0 trout and 21% for age-0 trout. Trichoptera, Ephemeroptera, and Diptera were most important in the diet; terrestrial insects and aquatic vertebrates were rare. The degree of selectivity varied through 24 h and the interpretation depended on the method of analysis used. Occurrence of low-drift cased Trichoptera larvae in stomachs was correlated with amount of filamentous algae ingested, indicating a degree of epibenthic foraging, although no diel pattern could be reliably discerned. Mean length of prey items in stomachs was larger that the drift in 83% of the samples. Our findings support experimentally derived decision rules-of-thumb for foraging trout: select larger prey items, select vulnerable prey, and relax selectivity when hungry.

L'alimentation estivale du campagnol des champs, Microtus pennsylvanicus, Ord.

1979 ◽  
Vol 57 (10) ◽  
pp. 2028-2032 ◽  
Author(s):  
Jean-Marie Bergeron ◽  
Jacques Juillet
Keyword(s):  
Stomach Content ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Microtus Pennsylvanicus ◽  
Meadow Voles ◽  
Animal Feeds ◽  
Content Analyses ◽  
Common Plant

Stomach content analyses performed on 272 meadow voles (Microtus pennsylvanicus) revealed that the animal feeds on 35 of the 45 species of plant present in its habitat. Timothy is the most abundant and the most common plant in the vole's diet. The abundance of the plants sampled in the habitat is positively correlated with the abundance of the plants found in the stomach contents. However, some species, like meadow grass (Poa spp.), aredefinitely preferred by the voles since they appear more frequently in the stomach contents than in the habitat. Some feeding habits are also sex dependent.[Translated by the journal]

scholarly journals THE SNAKES COLLECTION FROM PAPUA, INDONESIA WITH NOTES ON ANALYSIS OF STOMACH CONTENT

2020 ◽  
Vol 2 (1) ◽  
pp. 36-45
Author(s):  
Keliopas Krey ◽  
Denisa Taran ◽  
Hendrik Burwos ◽  
Irvan Sidik
Keyword(s):  
Alien Species ◽  
Stomach Content ◽  
Stomach Contents ◽  
Whole Body ◽  
Body Parts ◽  
Protected Species ◽  
West Papua ◽  
Voucher Specimens ◽  
Conservation And Management ◽  
Prey Items

A complete list of snake species found in Papua is essential for the conservation and management of these species in the future. This study provides a basic overview of the snake’s specimens deposited in the Laboratorium Zoology UNIPA (LZU) at Manokwari, West Papua Province during at last 15 years. In addition, these data are compared with specimens from the Muzeum Zoologicum Bogoriense (MZB) at Cibinong, West Java. We recorded 30 species of snakes from LZU (36.1%), and 43 species from MZB (51.8%), of the 83 species reported by Allison (2007). Clearly much more collecting effort needs to be focused on Papua, as less than 50% of the known species have voucher specimens in a museum. Of the species on collection, Morelia viridis is the only protected species on Papua, while Lycodon aulicus is the only alien species. We also conducted a through investigation of prey content for each species using preserved stomach contents. We dissected a total of 93 specimens. Twenty-nine percent of the specimens contained prey items. We discovered four categories of prey items, whole body, body parts, shell, and hair.  The prey items belonged to the following four classes of animals: Reptiles (56%), Amphibians (16%), Mammals (19%), and Osteichtyes (9%).

Stomach contents of the marine tucuxi dolphin (Sotalia guianensis) from Rio de Janeiro, south-eastern Brazil

2007 ◽  
Vol 87 (1) ◽  
pp. 253-254 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Salvatore Siciliano
Keyword(s):  
Rio De Janeiro ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Additional Information ◽  
Sotalia Guianensis ◽  
South Eastern ◽  
Eastern Brazil ◽  
Trichiurus Lepturus ◽  
Cynoscion Guatucupa ◽  
Janeiro State

Along the central coast of Rio de Janeiro State (22°25′S–23°00′S), south-eastern Brazil, the marine tucuxi dolphin (Sotalia guianensis) feeds on neritic prey that are distributed through the water column and are abundant all year round. The most frequently found species were the teleost fish Trichiurus lepturus, Cynoscion guatucupa, Isopisthus parvipinnis and Porichthys porossisimus. Fish species were more important than cephalopod species in the diet of the marine tucuxi. Back calculations of prey sizes indicated that they feed mainly on young specimens. The present study provided additional information on the feeding habits of the marine tucuxi dolphin.

scholarly journals Food habits of snakes from the RPPN Feliciano Miguel Abdala, an Atlantic Forest fragment of southeastern Brazil

2009 ◽  
Vol 9 (1) ◽  
pp. 263-269 ◽  
Author(s):  
Cesar Felipe de Souza Palmuti ◽  
José Cassimiro ◽  
Jaime Bertoluci
Keyword(s):  
Cluster Analysis ◽  
Atlantic Forest ◽  
Food Habits ◽  
Stomach Contents ◽  
Southeastern Brazil ◽  
Forest Fragment ◽  
Diet Preferences

We present data on the diet of 15 species of snakes belonging to a community from Reserva Particular do Patrimônio Natural Feliciano Miguel Abdala, an Atlantic Forest fragment of Southeastern Brazil, based on their stomach contents. For 12 items we were able to determine the direction of the ingestion. Most snakes ingested the prey head-first. A cluster analysis was conducted with items grouped as chilopods, mollusks, adult anurans, anuran tadpoles, lizards, amphisbaenians, snakes, and rodents. The phylogenetic influence on diet preferences is discussed.

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