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Articles 1 - 6 of 6
Full-Text Articles in Behavior and Ethology
Occurrence And Genetic Diversity Of Lemon Sharks (Negaprion Brevirostris) At A Nursery Ground At The Chandeleur Islands, Louisiana., Jonathan F. Mckenzie
Occurrence And Genetic Diversity Of Lemon Sharks (Negaprion Brevirostris) At A Nursery Ground At The Chandeleur Islands, Louisiana., Jonathan F. Mckenzie
University of New Orleans Theses and Dissertations
Anecdotal evidence suggested that immature lemon sharks (Negaprion brevirostris) occur at the Chandeleur Islands in southeastern Louisiana. From May 2009 to August 2011, the Nekton Research Laboratory at the University of New Orleans regularly sampled habitats at the Chandeleur Islands to confirm the presence of immature individuals of this species. During these efforts, 147 immature lemon sharks (neonates, young-of-the-year, and juveniles) were collected. Each shark was PIT tagged and a tissue sample was taken for genetic analyses. Sizes ranged from 56 – 177 cm total length. Sharks showed a preference for sandy substrate and smaller individuals showed significant preference …
Ecology And Flock-Following Behavior Of The Wedge-Billed Woodcreeper In Eastern Ecuador, Abigail Darrah
Ecology And Flock-Following Behavior Of The Wedge-Billed Woodcreeper In Eastern Ecuador, Abigail Darrah
Graduate Theses and Dissertations
The wedge-billed woodcreeper (Glyphorynchus spirurus) is a common understory suboscine passerine of lowland Neotropical rainforests. It frequently joins mixed-species understory flocks but also regularly forages alone, and thus is an excellent model species on which to conduct comparative behavioral observations to examine the hypothesized costs and benefits of flock-following. Individuals exhibit variable flocking propensities (proportion of time spent with flocks), and thus observing the correlations between flocking propensity and physical and environmental factors can provide further insight into the importance of flock-following to the ecology of this species. Despite its abundance at many sites and its wide geographic range, surprisingly …
Unexpected Phylogenetic Positions Of The Genera Rupirana And Crossodactylodes Reveal Insights Into The Biogeography And Reproductive Evolution Of Leptodactylid Frogs, Antoine Foquet, Boris Leonardo Blotto, Maximiliano Manuel Maronna, Vanessa Kruth Verdade, Flora Acuña Juncá, Rafael O. De Sá, Miguel Trefaut Rodrigues
Unexpected Phylogenetic Positions Of The Genera Rupirana And Crossodactylodes Reveal Insights Into The Biogeography And Reproductive Evolution Of Leptodactylid Frogs, Antoine Foquet, Boris Leonardo Blotto, Maximiliano Manuel Maronna, Vanessa Kruth Verdade, Flora Acuña Juncá, Rafael O. De Sá, Miguel Trefaut Rodrigues
Biology Faculty Publications
Despite major progress in deciphering the amphibian tree of life by molecular phylogenetics, we identified two questions remaining to be answered regarding relationships within Hyloidea, the clade of South American origin that comprises most extant anuran diversity. A few genera like Rupirana and Crossodactylodes have enigmatic phylogenetic positions, and relationships among major lineages within some families like Leptodactylidae remain ambiguous. To resolve these specific questions we used two approaches (1) a complete matrix approach representing >6.6 kb, including most major Hyloidea lineages (61 terminals) combining different methods of phylogenetic reconstruction and measures of node support; and (2) a supermatrix approach …
The Advertisement Calls And Distribution Of Two Sympatric Species Of Chiasmocleis (Méhely 1904) (Anura, Microhylidae, Gastrophryninae) From The Atlantic Forest, Mauricio C. Florani, Caio Vinicus De Mira Mendes, Iuri Ribeiro Dias, Danilo Silva Ruas, João Fillipe Riva Tonini, Rafael O. De Sá
The Advertisement Calls And Distribution Of Two Sympatric Species Of Chiasmocleis (Méhely 1904) (Anura, Microhylidae, Gastrophryninae) From The Atlantic Forest, Mauricio C. Florani, Caio Vinicus De Mira Mendes, Iuri Ribeiro Dias, Danilo Silva Ruas, João Fillipe Riva Tonini, Rafael O. De Sá
Biology Faculty Publications
The advertisement calls of Chiasmocleis cordeiroi and C. crucis are described for populations from the municipalities of Igrapiúna and Camacan, respectively, state of Bahia, Brazil. Both calls consist of multipulsed notes produced in series. Differences between the two calls are: dominant frequency, higher in C. cordeiroi (range 4500–4898 Hz; C. crucis range 4069–4435 Hz); note rate, higher in C. cordeiroi (range 6.20–7.46 s/note; C. crucis range 5.17–5.59 s/note); pulse rate, higher in C. cordeiroi (151.82–194.83 s/note; C. crucis range 125.30– 142.12 s/note); and the structure of the modulation patterns of the notes. Moreover, the advertisement calls of C. crucis and …
Age Structure Of Moose (Alces Alces) Killed By Gray Wolves (Canis Lupus) In Northeastern Minnesota, 1967–2011, L. David Mech, Michael E. Nelson
Age Structure Of Moose (Alces Alces) Killed By Gray Wolves (Canis Lupus) In Northeastern Minnesota, 1967–2011, L. David Mech, Michael E. Nelson
USGS Northern Prairie Wildlife Research Center
The ages of 77 adult Moose (Alces alces) killed by gray Wolves (Canis lupus) during the period 1967–2011 in northeastern Minnesota were significantly older than those of a sample of 17 585 Moose killed by hunters in nearby Ontario. Our findings support those of earlier studies of protected Moose populations in national parks that found that gray Wolves tend to kill disproportionately more older Moose.
Antelope Mating Strategies Facilitate Invasion Of Grasslands By A Woody Weed, Shivani Jadeja, Soumya Prasad, Suhel Quader, Kavita Isvaran
Antelope Mating Strategies Facilitate Invasion Of Grasslands By A Woody Weed, Shivani Jadeja, Soumya Prasad, Suhel Quader, Kavita Isvaran
School of Biological Sciences: Faculty Publications
Intra and interspecific variation in frugivore behaviour can have important consequences for seed dispersal outcomes. However, most information comes from among-species comparisons, and within-species variation is relatively poorly understood. We examined how large intraspecific differences in the behaviour of a native disperser, blackbuck antelope Antilope cervicapra, influence dispersal of a woody invasive, Prosopis juliflora, in a grassland ecosystem. Blackbuck disperse P. juliflora seeds through their dung. In lekking blackbuck populations, males defend clustered or dispersed mating territories. Territorial male movement is restricted, and within their territories males defecate on dung-piles. In contrast, mixed-sex herds range over large areas …