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Number of projects found: 1092

Response of birds to broken eggs in their nests

2000

We tested the responses of two bird species which nest on unmovable substrates (e.g., cavities and walls) to simulated and actual egg damage in their nest. Tree Swallows (Tachycineta bicolor) and Barn Swallows (Hirundo rustica) removed...

Sexual dimorphism in malodorousness of musk secretions of snakes

2000

Sexual dimorphism is a widespread phenomenon among animals (Darwin, 1871; Andersson, 1994). Differences between the sexes come in many forms, in- cluding both morphology (e.g., size, shape, coloration) and behavior (e.g., risk-taking or defensive behavior). Sexual differences in physiology also...

Use of inhalant anesthetics in three snake species

2000

Different snake species respond differently to various anesthetic agents. Hence, an anesthetic procedure developed for one species cannot necessarily be safely transferred to another species. The goal of this paper is to summarize our experience using inhalant anesthetics on three...

Effects of a mite, Limnochares americana (Hydrachnida: Limnocharidae), on the life-history traits and grooming behaviour of its damselfly host, Enallagma ebrium (Odonata: Coenagrionidae)

1999

We examined whether experimental parasitism by a mite Limnochares americana (Lundblad) affected survivorship and maturation of adult damselflies Enallagma ebrium (Hagen). We then tested whether differences in grooming activity between control and exposed individuals (within different age or sex categories...

Microsatellite evolution in sunfish (Centrarchidae)

1999

We describe 10 microsatellite loci from bluegill (Lepomis macrochirus) and discuss their evolution within the Centrarchidae. All of the loci exhibit Mendelian inheritance and are unlinked. While six loci are conserved within the Centrarchidae (found also in pumpkinseed...

Why do diurnal moths have ears?

1999

Ears exist in moths primarily for the purpose of detecting hunting bats at night to avoid predation. The ears of four species of day-flying Nearctic moths are as sensitive as those of a common, night-flying genus to the frequencies emitted...

Homing ability of breeding male tree swallows

1998

We inadvertently examined homing ability in Tree Swallows when we removed twelve males from their nestboxes in 1993 as part of another study. These males were removed just prior to their mate's fertile period and released either 125 or 250...

Cryptic self-incompatibility in tristylous Decodon verticillatus (Lythraceae)

1997

There is growing evidence that many self‐compatible plants control the level of self‐fertilization with postpollination processes that give a siring advantage to cross pollen over self pollen through “cryptic self‐incompatibility” (CSI). Previous marker‐gene experiments with self‐compatible, tristylous Decodon verticillatus (Lythraceae)...