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wild birds; population size; population distribution; forest inventory; data analysis; tropics; monitoring; data collection; national parks; Caribbean
Abstract:
... We conducted double-observer point counts of birds from December 3 to December 31, 2005, on preestablished permanent Forest Inventory and Analysis (FIA) plots and National Park Service System trails within the Virgin Islands National Park, St. John, U.S. Virgin Islands. We had three objectives: (1) to collect abundance and distribution data for wintering land birds, particularly neotropical migran ...
taxonomic revisions; animal morphology; new species; new combination; animal taxonomy; new genus; Diplopoda; Cuba; Caribbean
Abstract:
... Amphelictogon rex; SCHIZODIRA (Chytodesmidae), based on Stenonia maculata Bollman. Drawings are presented of 7 species not before illustrated. ABSTRACT AUTHORS: //. F. Loomis ...
... A conspicuous band of bare sand averaging about 30 ft in width often separates reefs and beds of sea grasses (Thalassia and Cymodocea) in the Virgin Islands and other islands of the West Indies. This zone of sand appears to be the result of heavy grazing by parrotfishes (Scarus and Sparisoma) and surgeonfishes (Acanthurus) that stay close to reefs for shelter from predaceous fishes. Floating sea g ...
Linepithema humile; Pheidole megacephala; fauna; habitat preferences; indigenous species; microhabitats; surveys; Africa; Australia; Bermuda; Caribbean; Florida; Japan; South America
Abstract:
... Ants which actively extent their ranges and displace long—established populations of indigenous species on a world scale are limited to relatively few species. Two of the most striking are Pheidole megacephala and Iridomyrmex humilis. The former expanded its range from its original supposed home in middle Africa during the last century, displacing native species on a vast scale from Australia and ...
... The tiny island of South Bimini contains 4 species of lizards of he genus Anolis, a number surpassed only on the 4 largest islands of the Greater Antilles and on 2 very large and nearby satellite islands. These species are syntopic with respect to a two—dimensional area of the ground but divide the habitat according to perch height and perch diameter: sagrei is partly terrestrial but occurs more o ...
... This paper documents interspecific and intraspecific differences in certain niche parameters among 3 species of lizards of the genus Anolis occurring in the southern Lesser Antilles. The 2 species whose ranges broadly overlap in Grenada show significant differences in body temperatures and food size distributions. Although there is considerable difference in the maximum size attained by the 2 spec ...
analysis of variance; chi-square distribution; lizards; methodology; models; Caribbean
Abstract:
... Ecological data often come in the form of multidimensional tables of counts, referred to as contingency tables. During the last decade several new methods of analyzing such tables have been proposed. Here, a class of models analogous to those used in the analysis of variance is discussed, and a method for computing the expected cell counts for the different models is presented. Two differenet test ...
Vertisols; chloroform; chromatography; color; crystallization; ethanol; liquids; mass spectrometry; melting point; nuclear magnetic resonance spectroscopy; quinones; solubility; tropical soils; Caribbean
Abstract:
... An orange colored pigment identified as 2-methoxy-1,4-naphthoquinone was separated and identified from the dark colored 0 to 15-cm layer of Caribbean Vertisols. Extraction of the pigment was carried out by shaking the soil (> 2 mm) in CHCl₃ (1:2) and decanting the supernatant liquid from which the pigment was purified by column chromatography and crystallization from ethanol. Eight kilograms of so ...
... A study of the reproductive cycle of three species of lizards, a forest form, Anolis limifrons, a forest edge species, A. tropidogaster, and a grassland species, A. auratus, was carried out in the Isthmus of Panama from November 1965 until September 1969. The collecting sites were: Pacific side for all three species, mid—Isthmus for A. limifrons and A. auratus and Caribbean side for A. limifrons. ...
... The species that constitute a tropical bat fauna partition the food available in an environment in an orderly manner, the two most important parameters of partitioning being the type of food and food particle size. On small Caribbean islands there seems to be a fundamental partitioning of food that includes one fruit bat, two nectar bats, two insect bats, and one fishing bat; other food habits, su ...
biological control; coasts; coral reefs; corals; species diversity; Caribbean; Panama
Abstract:
... A method of counting chain links covering living coral is described and discussed as a means of calculating species diversity on coral reefs. Species diversity on San Blas coral reefs, Atlantic coast, Panama, shows two trends: diversity (H') increase from the surface to a peak of 3.2 at 5 m, remains between 1.5 and 3.5 down to 25 m, and then falls off to 0.0. Superimposed on this trend is an incre ...
... Although tagged green turtles that return to Tortuguero Beach to nest show definite site fixity, their site discrimination is not absolute. The modal distance between successive returns, whether after the 2—week internesting period of a given season or after the 2— or 3—year remigration interval between nesting seasons, is .2 km; average separation of return points is 1.2 km. In view of the steady ...
Scarus; coasts; fish; foraging; males; migratory behavior; reefs; sex reversal; Caribbean; Panama
Abstract:
... A total of 374 striped parrotfish (Scarus croicensis) were tagged from the reefs surroundihg Isla Pico Feo on the Caribbean coast of Panama. Many of these fish were followed individually in the field for up to 3 months. Three different behavioral categories were recognized: stationary, territorial, and foraging. Fish tend to aggregate in foraging groups in a particular pattern relative to reef str ...
Araneae; arthropod communities; arthropods; dry season; imagos; insects; islands; leaves; predators; second growth; temperate zones; woodlands; Caribbean; Central America; Kansas; Puerto Rico
Abstract:
... Foliage arthropod collections from Puerto Rico second growth vegetation are analyzed at five sites from sweep samples taken in the dry season (February 1972). Data on taxonomic composition, diversity, evenness, and trophic structure are presented for these sites and compared with published data for other tropical and temperate areas. We conclude that the second growth vegetation of Puerto Rico sup ...
... Detailed data (numbers of species, numbers of individuals, measures of species diversity, evenness, dry weight) are presented on the adult beetles, adult bugs, or all arthropods, in sweep samples from Costa Rican secondary vegetation and primary forest understory during night and day, over a 3,340—m elevational transect, during the wet and dry seasons, and from Caribbean Island secondary vegetatio ...
Scarus; coasts; females; fins; fish; males; reefs; sex reversal; spawning; territoriality; Caribbean; Panama
Abstract:
... A detailed study of a territorial form of the striped parrotfish (Scarus croicensis) was done on the reefs surrounding Isla Pico Feo on the Caribbean coast of Panama. Territories were located in shallow water (less than 3 m), averaged 12 m² in size, and appeared to serve as feeding and occasionally spawning grounds. The dominant territorial fish was female. A terminal—phase male, which may be pair ...
case studies; environmental factors; funding; humans; monitoring; soil; tourism; vegetation; water yield; Caribbean
Abstract:
... Ecologists are increasingly in demand to provide both background information to development and to conduct validatory studies prior to funding. This paper describes an advisory study conducted on the Caribbean island of Mustique prior to development for tourism. It is argued that the ecologist uses biological as well as physical indicators to assess suitability of different areas for development a ...
allophane; drying; liquids; plasticity; rehydration; shrinkage; soil; Caribbean; Japan
Abstract:
... Allophane imparts unusual physical properties to soils. Some of these properties change markedly when the soil is dried. Samples of moist soils were obtained from two different areas. Plasticity and shrinkage were measured, as indicators of other physical properties, on both moist and dried samples. Several chemical measurements commonly used to characterize allophane were also made on the samples ...
aggression; baiting; covariance; foraging; forests; nesting sites; niches; species diversity; tuna; Caribbean; Michigan; Puerto Rico; Virgin Islands of the United States; West Virginia
Abstract:
... Short—term competition was examined in ant communities in West Virginia, Michigan, Puerto Rico, and St. John (U.S. Virgin Islands), by baiting with tuna fish. Species in Puerto Rico, where resource accrual was more rapid, had broader niches than in West Virginia. Niche breadths were not related to colony size, worker size, or aggressiveness. In forest areas, there was good agreement between observ ...