scholarly journals Diet of Crotalus enyo (Serpentes: viperidae) from the Baja California Cape Region, Mexico

2016 ◽  
Vol 32 (1) ◽  
Author(s):  
Rubén A. Carbajal-Márquez, ◽  
Gustavo Arnaud ◽  
Marcio Martins ◽  
Gustavo E. Quintero-Díaz
Keyword(s):  
Natural History ◽  
Diet Composition ◽  
Baja California ◽  
Stomach Contents ◽  
Baja California Peninsula ◽  
Specialist Predator ◽  
History Of ◽  
Prey Items

Crotalus enyo is a rattlesnake endemic to Baja California peninsula, Mexico. The natural history of this species is poorly known, so the goal of this study was to determine the diet of C. enyo in the Cape Region, an area with different conditions than the rest of the peninsula. We analyzed the stomach contents of 24 specimens obtained during 2010-2013, and identified the ingested prey. The diet of C. enyo consists of rodents (83.34%) and lizards (16.66%), although presents a diverse diet, the data suggest C. enyo is a specialist predator at Cape Region. We didn’t find differences in diet composition between sexes, site of capture, or season. This study documents three new prey items in the diet of C. enyo: the Orange-Throated Whiptail (Aspidocelis hyperythra), the Cape Spiny-Tailed Iguana (Ctenosaura hemilopha) and Hunsaker’s Spiny Lizard (Sceloporus hunsakerii).

scholarly journals Evidence of Predation on Nestling Birds by Eastern Gartersnakes (Thamnophis sirtalis sirtalis)

2016 ◽  
Vol 130 (2) ◽  
pp. 146 ◽  
Author(s):  
William D. Halliday
Keyword(s):  
Natural History ◽  
Food Choice ◽  
Prey Availability ◽  
Prey Preference ◽  
Thamnophis Sirtalis ◽  
Space And Time ◽  
History Of ◽  
The Common ◽  
Prey Items

Diet is an important aspect of the natural history of all animals, but diet can vary through space and time because of variations in prey availability. The diet of the Common Gartersnake (Thamnophis sirtalis) consists mainly of earthworms and frogs, but other prey items might be important when they are locally abundant. I report an observation of a female Eastern Gartersnake (Thamnophis sirtalis sirtalis) regurgitating 2 nestling birds in Ottawa, Ontario, Canada. Birds are seldom present in the diet of the Common Gartersnake. This rare food choice highlights the opportunistic nature of foraging by adult Common Gartersnakes and, further, demonstrates that diet depends not only on prey preference, but also on prey availability.

scholarly journals Diet of Odorrana chapaensis (Bourret, 1937) from Son La Province, Vietnam

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Pham Van Anh ◽  
Nguyen Quang Truong ◽  
Nguyen Van Hoang
Keyword(s):  
Natural History ◽  
Feeding Ecology ◽  
Stomach Contents ◽  
Field Work ◽  
Iucn Red List ◽  
Red List ◽  
Insect Larvae ◽  
Amphibian Species ◽  
Importance Index ◽  
Prey Items

Since there is currently a lack of data on the natural history and feeding ecology of Odorrana chapaensis, which was listed in the IUCN Red List (2019), we herein provided the feeding ecology of this amphibian species is virtually lacking. We herein provide data about the diet of O. chapaensis based on the results of our field work in Ngoc Chien Commune, Muong La District and Xim Vang Commune, Bac Yen District, Son La Province, Vietnam. We used the stomach-flushing method to obtain the stomach contents of 85 individuals at two survey sites. A total of 20 prey categories with 334 items, comprising 299 items of invertebrates and 35 unidentified items, were found in the stomachs of O. chapaensis. The dominant prey items of O. chapaensis were Araneae, Polydesmida, insect larvae, Blattodea, Coleoptera, Dermaptera, Lepidoptera, Hymenoptera, and Orthoptera. The importance index for these categories ranged from 3.5% to 32.5%. Coleoptera was the category with the highest frequency of prey items; its representatives were found in 45 stomaches. 

scholarly journals Diet and trophic niche overlap of Boana bischoffi and Boana marginata (Anura: Hylidae) in southern Brazil

2018 ◽  
Vol 19 (1) ◽  
Author(s):  
Camila F. Moser ◽  
Mateus de Oliveira ◽  
Fernanda R. de Avila ◽  
Diogo Dutra-Araújo ◽  
Renata K. Farina ◽  
...  
Keyword(s):  
Natural History ◽  
Atlantic Forest ◽  
Diet Composition ◽  
Niche Breadth ◽  
Niche Overlap ◽  
Food Composition ◽  
Trophic Niche ◽  
Southern Brazil ◽  
Important Prey ◽  
History Of

Abstract: The species Boana bischoffi and Boana marginata are endemic to the Atlantic Forest, where they often occur in sympatry. There is a large gap in the knowledge of natural history of both species. In this study, we aimed to describe and compare the diet composition of B. bischoffi and B. marginata in the southern domain of the Brazilian Atlantic Forest. We analyzed the gastrointestinal contents of 43 individuals of B. bischoffi and 30 individuals of B. marginata. Both showed a high trophic niche overlap (0.90 Ojk). The most important prey categories for both species belonged to the orders Araneae and Coleoptera. The species niche breadth (Bsta) varied from 0.35 to 0.42, suggesting a generalist feeding behavior for both species. Our data provide unprecedented information on these species' food composition, contributing to a better knowledge of the natural history of neotropical anurans.

scholarly journals Evidence of cannibalism in a population of western Galápagos racers Pseudalsophis occidentalis (Serpentes: Colubridae)

2021 ◽  
pp. 6-11
Author(s):  
LUIS ORTIZ-CATEDRAL
Keyword(s):  
Natural History ◽  
Trophic Interactions ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Galapagos Archipelago ◽  
Faecal Samples ◽  
History Of ◽  
Common Behaviour ◽  
Prey Items

Cannibalism is a common behaviour among snakes, but it has not yet been verified for any of the nine species of Galápagos racer (Pseudalsophis spp.), a group endemic to the Galápagos archipelago, Ecuador. Galápagos racers are opportunistic generalists feeding on a variety of vertebrate prey. There are a few anecdotal and suspected attempts of cannibalism among Galápagos racers, but it is unclear whether this behaviour occurs and if so, how frequent it is. We analysed 61 faecal samples from western Galápagos racers (Pseudalsophis occidentalis). In addition to the remains of well known prey items such as lizards, we found snake teeth and skin fragments in 11 samples. Combined with previous observations of attempted cannibalism between western Galápagos racers, our results represent evidence that this species consumes other racers as prey. Our study contributes to a growing knowledge of the natural history of Galápagos racers and highlights the role of these reptiles in complex trophic interactions in the Galápagos islands.

scholarly journals THE THE FIRST DOCUMENTED PREY ITEMS FOR Bothrops medusa (STERNFELD, 1920)

2019 ◽  
Vol 2 (1) ◽  
pp. 48
Author(s):  
Tristan David Schramer
Keyword(s):  
Endangered Species ◽  
Natural History ◽  
Stomach Contents ◽  
Museum Specimens ◽  
University Of Illinois ◽  
Natural History Collections ◽  
The University ◽  
Prey Items

The Venezuelan forest pitviper (Bothrops medusa) is an endangered viperid endemic to the central range of the Cordillera de la Costa in Venezuela. Little is known regarding its natural history. We examined the stomach contents of museum specimens housed in the University of Illinois Museum of Natural History Herpetology Collection and report the first prey items for the species. The arboreal habits of both prey items support the notion that B. medusa may be semi-arboreal. This exposes the need for further studies on this rare viperid and showcases the value of natural history collections for studying endangered species.

scholarly journals Historia natural de la anidación de ammophila aberti haldeman (hymenoptera: sphecidae) en Baja California Sur. México

2008 ◽  
Vol 24 (2) ◽  
Author(s):  
María Luisa Jiménez-Jiménez ◽  
Carlos Palacios-Cardiel
Keyword(s):  
North America ◽  
Natural History ◽  
Baja California ◽  
Arid Zone ◽  
First Record ◽  
Baja California Sur ◽  
History Of ◽  
Historia Natural

Natural history of nesting of the wasp Ammophila aberti Haldeman during autumn 2006-2007 in Baja California Sur, Mexico is described. While this wasp has been found in Mexico, this is the first record of thisbehavior in the subtropical, arid zone of North America. A comparison with nesting observations in other places was made. Two species of ants are predators of these wasp larvae.

Year-round niche segregation of three sympatric Hydrobates storm-petrels from Baja California Peninsula, Mexico, Eastern Pacific

2021 ◽  
Vol 664 ◽  
pp. 207-225
Author(s):  
Y Bedolla-Guzmán ◽  
JF Masello ◽  
A Aguirre-Muñoz ◽  
BE Lavaniegos ◽  
CC Voigt ◽  
...  
Keyword(s):  
Baja California ◽  
Trophic Position ◽  
Sympatric Species ◽  
Baja California Peninsula ◽  
Feeding Strategies ◽  
Breeding Period ◽  
Similar Species ◽  
Niche Segregation ◽  
Use Of Resources ◽  
Prey Items

Ecologically similar species partition their use of resources and habitats and thus coexist due to ecological segregation in space, time, or diet. In seabirds, this segregation may differ over the annual cycle or vary inter-annually. We evaluated niche segregation in 3 sympatric storm-petrel species (Hydrobates melania, H. leucorhous, and H. microsoma) from the San Benito Islands, Mexico, during 2012 and 2013. We used diet samples and carbon (δ13C) and nitrogen (δ15N) isotopic values obtained from egg membranes, blood, feathers, and prey. We used krill samples to delineate marine δ13C and δ15N isoscapes for the Baja California Peninsula. During the breeding season, storm-petrels segregated regarding diet composition, stable isotope values, and isotopic niches. H. melania consumed higher trophic-position prey from neritic waters, while H. leucorhous and H. microsoma foraged on lower-trophic position prey from oceanic waters. Isotopic niches among species did not overlap in 2013, whereas those of H. microsoma and H. leucorhous overlapped in 2012. The feeding strategies of H. melania varied among breeding phases, and adults consumed different prey items from different areas compared to those of their offspring. H. microsoma adults and their chicks consumed the same prey items but from different habitats. During the non-breeding period, niche segregation between species persisted, except for H. microsoma and H. leucorhous during the molt of primary (P1) and undertail cover feathers. These 3 sympatric species coexist through niche segregation based on prey items and foraging areas that vary seasonally and year-round, probably due to changes in oceanographic conditions and the distribution and availability of prey.

scholarly journals Natural history of the rare and endangered snake Atractus ronnie (Serpentes: Colubridae) in northeastern Brazil

2019 ◽  
Vol 18 (1) ◽  
pp. 77-87
Author(s):  
Cristiana Ferreira-Silva ◽  
Samuel Cardozo Ribeiro ◽  
Edna Paulino de Alcantara ◽  
Robson Waldemar Ávila
Keyword(s):  
Sexual Dimorphism ◽  
Natural History ◽  
Diet Composition ◽  
Northeastern Brazil ◽  
Activity Period ◽  
Pitfall Traps ◽  
Insect Larvae ◽  
Rare And Endangered ◽  
History Of ◽  
Visual Searches

Natural history of the rare and endangered snake Atractus ronnie (Serpentes: Colubridae) in northeastern Brazil. The habitat use, activity period, sexual dimorphism, morphological variation, reproduction and diet composition of this fossorial and nocturnal snake are reported. The snakes were captured between 2008–2014 in the Chapada do Araripe in northeastern Brazil, and were collected by active visual searches, as well as in pitfall traps with drift fences. Although females are larger than males, the males have longer tails, and scale counts differ between the sexes. Reproduction is seasonal, occurring during the rainy season. Brood sizes rang from one to four eggs. Atractus ronnie preys on earthworms, in addition to ants (Crematogaster sp.) and insect larvae.

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