A5026976143- Avian ecology and behavior
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Identification and Quantification in Food
- Bird parasitology and diseases
- Animal Ecology and Behavior Studies
- Plant and animal studies
- Aquatic life and conservation
- Livestock and Poultry Management
- Wildlife Ecology and Conservation
- Bat Biology and Ecology Studies
- Environmental and Biological Research in Conflict Zones
- Animal Behavior and Reproduction
- Rangeland and Wildlife Management
- Species Distribution and Climate Change
- Comparative Animal Anatomy Studies
- Ecology and biodiversity studies
- Spider Taxonomy and Behavior Studies
- Wildlife Conservation and Criminology Analyses
- Amphibian and Reptile Biology
- Animal Vocal Communication and Behavior
- Marine animal studies overview
- Marine and fisheries research
- Forensic and Genetic Research
- Turtle Biology and Conservation
United States Fish and Wildlife Service
2004-2022
Ashland (United States)
2004-2022
California Academy of Sciences
1986-1998
American Samoa Government
1994-1997
Golden Gate University
1992-1993
Occidental College
1993
University of California, Santa Barbara
1993
Cornell University
1985-1987
University of California, San Francisco
1986
University of California, Davis
1980
The aggregation of displaying males in lek-breeding birds is often associated with disruption courtship and mating but effects this on mate choice have not been shown. In a 4-year study Rupicola rupicola Suriname, interference among territorial adult disrupted 31 percent all female visits terminated 32 matings at lek where there were an average 55 males. Disruption rain forest species caused females to modify their patterns, that used intense persistent received disproportionate share...
Approximately one-quarter of all lek-breeding bird species are sexually monomorphic. Understanding the significance, if any, this exception to usual correlation between sexual selection and dimorphism requires detailed data on mating systems both monomorphic dimorphic species. The capuchinbird (Perissocephalus tricolor) is a monomorphic, member cotinga family. I studied social behavior species, compared it with Guianan cock-of-the-rock (Rupicola rupicola), dimorphic, lekking same Male-male...
Abstract: Recent population expansion of Barred Owls ( Strix varia ) into western North America has led to concern that they may compete with and further harm the Northern Spotted Owl S. occidentalis caurina ), which is already listed as threatened under U.S. Endangered Species Act (ESA). Because hybridize, there a legal need ESA for forensic identification both species their hybrids. We used mitochondrial control‐region DNA amplified fragment‐length polymorphism (AFLP) analyses assess...
The Role of Song in the Evolution Passerine Diversity Get access Luis F. Baptista, Baptista Department Ornithology and Mammalogy, California Academy SciencesSan Francisco, 94118, USA Search for other works by this author on: Oxford Academic PubMed Google Scholar Pepper W. Trail Systematic Biology, Volume 41, Issue 2, June 1992, Pages 242–247, https://doi.org/10.1093/sysbio/41.2.242 Published: 01 1992 Article history Received: 03 July 1991 Accepted: 18 March
I documented predator attacks and antipredator behavior at four display sites of Guianan Cock-of-the-Rock (Rupicola rupicola) in Suriname from 1980 to 1985. Most observations were made a large lek that averaged 55 territorial males, with supplemental data on groups 1, 2, 6 males. Males the main attacked by species raptors, 1 mammal species, snake species. A total 56 2 kills raptors observed (0.22 attacks/day). Two displaying males Boa constrictor also observed. Male very wary. 832 spooks...
Infanticide, the killing of eggs or nestlings, has been observed eight times during studies communally breeding Mexican jay from 1969-1980. In five six cases in which robber was identified, both and owner victimized nest were same communal unit. remaining case a trespasser neighboring Evidence jays anis suggests that infanticide among birds may be frequent plural-breeding species, more than one pair per unit lay eggs. Infanticide appears to restricted certain social units. Affected units are...
Abstract Africa is home to 23 of the world's 54 hornbill species, including largest members family, ground hornbills. None Africa's hornbills are currently considered be at significant risk extinction by IUCN, and none listed under Convention on International Trade in Endangered Species (CITES). However, there evidence for serious declines African forest due habitat loss fragmentation, unsustainable exploitation bushmeat. In addition, this paper documents a previously unreported...
ABSTRACT Tropical cyclones pass over or near American Samoa on average about once every 3 years. Because many trees may be stripped of leaves, flowers, and fruit, exert a major impact the feeding ecology nectivorous frugivorous flying foxes. We examined search time in‐tree immediately postcyclone (3–6 weeks) during recovery period (15–16 months after last cyclone). Both Pteropus tonganus P. samoensis increased decreased tree (an indication less food available per tree) passage cyclone Ofa.
Abstract During 4 seasons of study at a large (55 male) lek Guianan cock‐of‐the‐rock ( Rupicola rupicola ) in Suriname, we observed 3906 female courtship visits. Of these, 1171 (30.0%) were disrupted by adult males, 430 (11.0%) yearling and 289 (7.4%) females. This is one the highest levels disruption reported among lek‐breeding birds. Disruption was performed approximately half territorial males each year, spanning full range mating success territory location. Courtship occurs two contexts...
Brown‐headed Cowbirds, Molothrus ater , are brood parasites on many species of North American Passerines. Cowbird parasitism is frequently cited as a contributing factor in the decline United States passerine populations, based three lines evidence. First, range expansion and population increases by Cowbirds this century dramatic well documented. Second, increasing rates have been discovered variety host populations. Finally, direct negative effects certain vulnerable notably Kirtland’s...
Although vocal learning is widespread among birds, sexual imprinting appears to occur in more avian orders. The four features which LORENZ (1935) considered essentials of have parallels the song literature: these are 1. an early sensitive phase, 2. irreversibility, 3. completion long before manifestation, 4. supraindividuality. These principles still sound under certain experimental conditions, but LORENZ'S ideas require modification light recent data derived from experiments and field...
Abstract We critically reviewed recent attempts to identify the ancestor of Darwin's finches (Emberizidae, "Geospizinae"), and summarized new information on taxa that have been suggested as sister groups geospizines, specifically emberizines Tiaris, Melanospiza, Volatinia. Reproductive behaviors displays are conservative among finches, neglected in discussions ancestry group. concentrate these characters. found Tiaris Melanospiza share a large number apparently derived epigamic with none...