Conservation reserve program: source or sink habitat for grassland birds in Missouri?

Article Abstract:

The Conservation Reserve Program (CRP) has benefitted many declining populations of grassland birds, but few studies have proved that CRP plantings aid population growth. A new study investigates the theory that CRP fields are source habitats for seven species of grassland birds in Missouri. Fecundity is estimated and compared to fecundity rates thought to be required to maintain stable populations. The study finds little evidence that CRP contributes to populations of species, such as the dicksissel or the red-winged blackbird, but has probably contributed to the conservation of grasshopper sparrows, eastern meadowlarks and field sparrows.

Environmental aspects, Natural history, Protection and preservation, Habitats, Missouri, Grassland ecology, Wildlife habitat improvement, Conservation Reserve Program

---

Reproductive strategies, success, and mating systems of northern bobwhite in Missouri

Article Abstract:

A study has been conducted to describe the reproductive behavior of the northern bobwhite, Colinus virginianus, by measuring the reproductive success, clutches and male-incubated nests of 321 radio-marked birds. Female bobwhites exhibited monogamy during 60% of the mating period and were polygamous during the remaining 40%. Females that were successful in their first nesting attempt attempted second nests. Nest survival was high for all nests located. These results confirmed that bobwhites exhibit multiclutch and ambisexual polygamous mating systems.

Sexual behavior, Sexual behavior in animals, Animal sexual behavior, Animal reproduction

---

Survival and cause-specific mortality of northern bobwhite in Missouri

Article Abstract:

The seasonal survival, annual survival and cause-specific mortality of bobwhites were investigated. Some 1,001 bobwhites in northern Missouri were radio-monitored to evaluate the influence of incubation, brood-rearing, age and sex on their survival. The results, which indicated a lower survival rate for females during spring and fall, revealed avian and mammalian predators to be the primary natural threat to the survival.

Animal populations

Similar abstracts:

• Abstracts: Variability in vegetation effects on density and nesting success of grassland birds. Patch size and landscape effects on density and nesting success of grassland birds
• Abstracts: Resource selection by translocated three-toed box turtles in Missouri. Nomograms aid interpretation of complex regression models
• Abstracts: Depredation rates and predators at artificial bird nests in an unfragmented northern hardwoods forest. Predation rates and predators at artificial bird nests in an unfragmented northern hardwoods forest
• Abstracts: Characteristics of wolverine reproductive den sites. Seasonal habitat associations of the wolverine in central Idaho
• Abstracts: Visual projection map specified by topographic expression of transcription factors in the retina. A synaptic laminin-calcium channel interaction organizes active zones in motor nerve terminals

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.