Sobreposição de nicho e partilha de recursos entre cinco espécies simpátricas de bufonídeos (Anura, Bufonidae) do nordeste da Argentina

Duré, Marta Inés; Kehr, Arturo Ignacio; Schaefer, Eduardo Federico

doi:10.11606/issn.2316-9079.v8i1p27-39

Cited by 17 publications

(2 citation statements)

References 24 publications

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“…Stomach contents were removed and placed in Petri dishes, and the length, width, and height of each prey item were recorded using Mitutoyo digital calipers (±0.01 mm; (Leyte-Manrique & Ramírez-Bautista, 2010). The volume (mm 3 ) of all stomach contents (the total volume of all prey items in the stomach), volume of each category of prey found in a stomach (total volume of all grouped prey of the same order or category found in a single stomach), and the volume of each individual intact prey item found in each lizard stomach were obtained using the formula of an ellipsoid (Duré, Kehr & Schefer, 2009): . We used dichotomous keys to identify most types of prey to the taxonomic level of order (Triplehorn & Johnson, 2005), with the exception of Hymenoptera, which were further classified as formicids (ants) and non-formicids (bees and wasps).…”

Section: Methodsmentioning

confidence: 99%

Comparative morphology and trophic ecology in a population of the polymorphic lizard Sceloporus minor (Squamata: Phrynosomatidae) from central Mexico

García-Rosales

Ramírez‐Bautista

Stephenson

2019

PeerJ

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Polymorphism among individuals of the same population has generally been linked to alternative reproductive tactics, where different morphs can exhibit differences in their morphological, ecological, and behavioral attributes. These differences may result in a divergence in diet between morphs due to differential exploitation of habitat, morphological differences that influence prey selection, or differential energy expenditure that results in different nutritional needs. The present study analyzes the morphology (morphometry and body mass) and diet of red and yellow male morphs in a population (El Enzuelado) of the lizard Sceloporus minor from central Mexico. No differences between morphs were found for any of the morphometric variables analyzed (snout-vent length, tail length, jaw length, jaw width, head length, head width, head height, tibia length, femur length, forearm length and ventral patch length). In both morphs, allometric growth was observed in all body features analyzed, as well as in morphometric features of the head across seasons. Analysis of stomach contents showed that the diet of red males was composed of 12 categories of prey, while that of yellow males was composed of 10 categories; those categories of diet not shared between morphs (e.g., Isoptera, Psocoptera) were consumed by their respective morph in very low proportions. Categories of diet with the highest values of food importance for both groups were Coleoptera, Orthoptera, and leaves; a similar pattern was seen across seasons. This, in turn, is reflected in low niche breadth values for each morph and a very high niche overlap. There were no significant differences between morphs overall, or between morphs per season, in the weight and volume of stomach contents or in the number of prey items found in stomachs; however, differences in these variables across all males (independent of morph) were recorded between seasons. Likewise, no significant correlations were found between body size (snout-vent length) and the volume of stomach contents for either morph or between lizard mandibular dimensions and the volume of stomach contents for red morph males. For the yellow morph, prey volume unexpectedly decreased significantly with jaw size rather than increasing as expected. Overall, this study adds new information about the morphology and feeding of males in this species, and suggests that in this population, color morphs lack the morphological and ecological differences found in some other species of polymorphic lizard.

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Section: Methodsmentioning

confidence: 99%

Comparative morphology and trophic ecology in a population of the polymorphic lizard Sceloporus minor (Squamata: Phrynosomatidae) from central Mexico

García-Rosales

Ramírez‐Bautista

Stephenson

2019

PeerJ

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“…The diet of the amphibians of the American Chaco has been studied mainly for the HC anurans [89,[95][96][97]99,102,[106][107][108]112]. They have mostly a generalist diet, consuming different groups of invertebrates, including those related to the cycles described above.…”

Section: Life Cyclesmentioning

confidence: 99%

Nematodes of Amphibians from the South American Chaco: Distribution, Host Specificity and Ecological Aspects

2021

Self Cite

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This is the first review of the nematode parasites of amphibians from Dry Chaco (DC) and Humid Chaco (HC) ecoregions of South America, covering aspects related to their systematics, distribution, host range and ecology, including their life cycles. Of approximately 100 species of amphibians that inhabit these ecoregions, the nematode parasites of 32 species are known. The parasite species consisted of 51 taxa: 27 in HC and 18 in DC. The family Cosmocercidae alone included 18 species. Aplectana hylambatis and Cosmocerca podicipinus showed the widest geographical and host distribution. Leptodactylus bufonius and Rhinella major presented a high number of nematode parasites. The species richness of nematodes was related to the host body sizes and to the strategy to obtain prey. The mean species richness was higher in terrestrial amphibians with intermediate characteristics in the generalist–specialist spectrum in terms of diet, and in amphibians with intermediate characteristics between actively foraging and the “sit-and-wait” approach in terms of searching for prey. The patterns of similarity among amphibian species showed groups linking with their habitats. Nematodes usually have direct life cycles with the infectious form entering the host passively or actively. However, many amphibians are also involved in heteroxenous cycles that develop in the aquatic environment.

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Parasite-host relations and new reports of helminths for Rhinella dorbignyi (Duméril & Bibron, 1841) (Anura: Bufonidae) from Neotropical region

Coimbra

Mascarenhas

Henzel

et al. 2023

Parasitology International

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Sobreposição de nicho e partilha de recursos entre cinco espécies simpátricas de bufonídeos (Anura, Bufonidae) do nordeste da Argentina

Cited by 17 publications

References 24 publications

Comparative morphology and trophic ecology in a population of the polymorphic lizard Sceloporus minor (Squamata: Phrynosomatidae) from central Mexico

Comparative morphology and trophic ecology in a population of the polymorphic lizard Sceloporus minor (Squamata: Phrynosomatidae) from central Mexico

Nematodes of Amphibians from the South American Chaco: Distribution, Host Specificity and Ecological Aspects

Parasite-host relations and new reports of helminths for Rhinella dorbignyi (Duméril & Bibron, 1841) (Anura: Bufonidae) from Neotropical region

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