Food Partitioning in Three Sympatric Species of Map Turtle, Genus Graptemys (Testudinata, Emydidae)

  title={Food Partitioning in Three Sympatric Species of Map Turtle, Genus Graptemys (Testudinata, Emydidae)},
  author={R. Vogt},
  journal={American Midland Naturalist},
  • R. Vogt
  • Published 1981
  • Biology
  • American Midland Naturalist
Three species of map turtle, Graptemys geographica, G. ouachitensis and G. pseudo geo graphic a, inhabit the Mississippi River near Stoddard, Vernon Co., Wiscon- sin. Adult females of all three species are of similar size and are distinctly larger than males. One species, G. geographica, has a notably wider head than the other two. Quan- titative analysis of fresh stomach contents of 113 adult females, qualitative analysis of 74 others and feeding observations confirm that the three species use… Expand
Diets of Syntopic Black-knobbed Sawbacks (Graptemys nigrinoda) and Alabama Map Turtles (Graptemys pulchra) in the Alabama River
Analysis of feces from black-knobbed sawbacks and Alabama map turtles suggests dietary differentiation of sympatric Graptemys species may extend beyond differentiation in adult females more often than is generally thought. Expand
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Results are similar to earlier reports concerning the effect of invasive Asian Clams on decreasing dietary diversity in females of many populations of the four species of Graptemys that have mollusk-adapted mesocephalic females. Expand
Diet of Northern Map Turtles (Graptemys geographica): Sexual Differences and Potential Impacts of an Altered River System
There was virtually no overlap in the diets of the two sexes of G. geographica, and two different groups of prey are needed in order to support this population of Northern Map Turtles, and many North American pleurocerid gastropod species are highly endangered and also threatened by hydroelectric activity. Expand
The Diets of the Pearl and Pascagoula Map Turtles (Graptemys pearlensis and Graptemys gibbonsi)
Abstract Patterns of interspecific differences in the diets of nonavian reptiles may be complicated by intraspecific dietary diversity that is related to variation in body size and trophicExpand
Diet of the Texas Map Turtle (Graptemys versa): Relationship to Sexually Dimorphic Trophic Morphology and Changes Over Five Decades as Influenced by an Invasive Mollusk
It appears that 1 result of the invasion of rivers in North America by Corbicula is greatly decreased diversity of diet in adult female Graptemys of moderate head width (mesocephaly). Expand
Feeding ecology of the Sicilian pond turtle Emys trinacris (Testudines, Emydidae) influenced by seasons and invasive aliens species
A very clear difference was found between a site with allochthonous fishes and a site fish-free, with a more abundant and wide diet spectrum in the last one, as a result of the increased availability of prey. Expand
Resource use of five sympatric turtle species: effects of competition, phylogeny, and morphology
Phylogeny was shown to be of greater importance in structuring resource use in Kentucky Lake than interspecific competition, and the similarity in clustering phenograms was not consistent with the hypothesis of niche complementarity, suggesting that inter specific competition was of little importance. Expand
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Ecology of Riverine Turtle Communities in the Southern United States: Food Resource Use and Trophic Niche Dimensions
Abstract. As part of an integrated study of the ecology of freshwater riverine turtle communities in the southern United States, we analyzed food resource partitioning in the turtle communities ofExpand
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The first quantitative dietary study of Peruvian freshwater turtles, and the first diet analysis of wild M. gibba in the Amazon basin, shows a generalist feeding habit, ingesting animal and plant matter, but tending to be herbivorous. Expand


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It was determined that the two species compete for food resources where they are sympatric since they overlap considerably in resource utilization, and do not spatially or temporally partition food resources. Expand
The Anolis Lizards of Bimini: Resource Partitioning in a Complex Fauna
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Graptemys pseudogeographica in the Upper Missouri River of the Northcentral United States
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Utilization of Crawfishes by Cold-Blooded Vertebrates in the Eastern United States
Quantitatively crawfishes have been little studied. A few species, however, have been shown to exist in enormous numbers in their optimum habitats. Davis and Weibe (1930) reported the removal of overExpand
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The purpose of the present study is to learn which turtles, if any, retard the production of fish, to experiment with methods of control, to establish "a clean bill of health" for deserving species, and to determine other economic relations of these reptiles. Expand
Dietary Shift in the Turtle Pseudemys scripta (Schoepff) From Youth to Maturity
from a carnivorous to a herbivorous diet occurred over the course of one summer. A positive correlation between the calcium content of the shell and size of the turtle is demonstrated. The food ofExpand
An Unusual Chelonian Feeding Niche
The feeding mechanisms of the pelomedusid turtle Podocnemis unifilis include a surface—skimming behavior, termed neustophagia, which permits utilization of fine particulate food associated with theExpand
Measurement of "Overlap" in Comparative Ecological Studies
  • H. Horn
  • Biology
  • The American Naturalist
  • 1966
Objective, empirical measures of overlap between samples of items distributed proportionally into various qualitative categories derived from either probability or information theory should prove useful to the ecologist in comparative studies of diet, habitat preference, seasonal patterns of abundance, faunal lists, or similar data. Expand
Turtles of the United States
Turtles of the United State , Turtles of the United State , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی