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Full-Text Articles in Animal Sciences
Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson
Spatial And Temporal Variation In The Diet Composition Of Zooplankton In Mission Bay, Bryanna Paulson
Theses
Analyses of quantitative data on zooplankton diets are vital for understanding the drivers of zooplankton abundance within an ecosystem. Such analyses also provide insight into trophic pathways within the lower planktonic food web, which support populations of higher trophic level species. This study used carbon and nitrogen stable isotope ratios of size-fractionated plankton in Mission Bay, San Diego, CA to examine the spatial and temporal variation in zooplankton trophic ecology and determine potential environmental drivers of zooplankton community structure. Carbon stable isotopes reflect primary production sources in an organism’s diet, and nitrogen stable isotope ratios can be used to estimate …
Quantitative Heterodonty In Crocodylia: Assessing Size And Shape Across Modern And Extinct Taxa, Domenic D'Amore, Megan Harmon, Stephanie Drumheller, Jason Testin
Quantitative Heterodonty In Crocodylia: Assessing Size And Shape Across Modern And Extinct Taxa, Domenic D'Amore, Megan Harmon, Stephanie Drumheller, Jason Testin
Articles & Book Chapters
Heterodonty in Crocodylia and closely related taxa has not been defined quantitatively, as the teeth rarely have been measured. This has resulted in a range of qualitative descriptors, with little consensus on the condition of dental morphology in the clade. The purpose of this study is to present a method for the quantification of both size- and shape-heterodonty in members of Crocodylia. Data were collected from dry skeletal and fossil specimens of 34 crown crocodylians and one crocodyliform, resulting in 21 species total. Digital photographs were taken of each tooth and the skull, and the margins of both were converted …
Population And Ecological Characteristics Of The Dice Snake, Natrix Tessellata(Laurenti, 1768), In Lower Portions Of The Vrbanja River(Republic Of Srpska, Bosnia And Herzegovina), Goran Sukalo, Sonja Nikolic, Dejan Dmitrovic, Ljiljana Tomovic
Population And Ecological Characteristics Of The Dice Snake, Natrix Tessellata(Laurenti, 1768), In Lower Portions Of The Vrbanja River(Republic Of Srpska, Bosnia And Herzegovina), Goran Sukalo, Sonja Nikolic, Dejan Dmitrovic, Ljiljana Tomovic
Turkish Journal of Zoology
Despite their comparative richness and accessibility in the Republic of Srpska and in Bosnia and Herzegovina in general, population studies of reptiles have not been performed in Srpska until recently. For example, one of the most common snake species in this area is the dice snake; nevertheless, previous studies have only reported its distribution. The aim of the present study was to analyze characteristics of the dice snake population along the Vrbanja River. Animals were processed during 2011 throughout their activity period. In total, 199 individuals of all ages were collected. We observed substantial differences in numbers of animals captured …
Trophic Analysis And Parasitological Aspects Of Liolaemus Parvus (Iguania: Liolaemidae) In The Central Andes Of Argentina, Gabriel Natalio Castillo, Juan Carlos Acosta, Graciela Mirta Blanco
Trophic Analysis And Parasitological Aspects Of Liolaemus Parvus (Iguania: Liolaemidae) In The Central Andes Of Argentina, Gabriel Natalio Castillo, Juan Carlos Acosta, Graciela Mirta Blanco
Turkish Journal of Zoology
The objective of this study was to describe temporal variations in the diet and parasitological aspects in Liolaemus parvus. In order to examine the diet, we determined the volume, numerousness, and frequency of occurrence for each prey item and calculated the relative importance index. We removed nematodes from the stomach and estimated parasitic indicators. Liolaemus parvus presents an active searching mode. It is a predominantly insectivorous species with low intake of plant material and a specialist in feeding on prey items of the family Formicidae, although it also feeds on other arthropods like coleopterans, hemipterans, and spiders. We found temporal …