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9. Population Counts

Hernández, Fidel Texas A&M University Press ePub

Figure 9.1. Counts are an important component of management programs. Counts may be used to regulate quail harvest or evaluate the efficacy of habitat management. (Photograph by Fidel Hernández)

THE ECOLOGY OF BOBWHITES comprises 2 main pillars: habitat and population. Biologists and managers often gather information on these components to evaluate quail status. They may spend hours measuring habitat variables such as percent cover of bare ground, forbs, and brush and number of nesting clumps/acre. They also may collect data on the population such as the number of whistling males/stop, coveys flushed/hour, or age ratios. The need for habitat information is clear; it helps guide habitat management. Likewise, population information helps guide population management.

In this and the subsequent chapter we discuss 2 types of population measures—counts and age ratios—that may be used to evaluate bobwhite populations. We also discuss how this information may be used in management.

Why count bobwhites? They existed long before managers started tallying numbers. They also will persist in cattle country without score cards on population size. In fact, counting bobwhites often may not be needed on ranches or leases, especially where harvest is light and habitat is good. The same is not true for states. Game-management agencies must have data on population sizes or trends to evaluate the effects of hunting regulations and to satisfy the concerns of sportsmen and sportswomen.

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7: Use of Saccharothrix algeriensis NRRL B-24137 to Control Botrytis cinerea?

Compant, S.; Mathieu, F. CABI PDF


Use of Saccharothrix algeriensis

NRRL B-24137 to Control

Botrytis cinerea?

S. Muzammil,1* R. Saria,1* Z. Yu,1* C. Graillon,1*

F. Mathieu,1 A. Lebrihi1 and S. Compant1,2†

LGC UMR 5503 (CNRS/INPT/UPS), Département Bioprocédés et

Systèmes Microbiens, Université de Toulouse, Castanet-Tolosan France;


AIT Austrian Institute of Technology GmbH, Health and Environment

Department, Bioresources Unit, Tulln an der Donau, Austria



Beneficial bacteria are known to help their hosts by increasing plant growth and/or protecting them from several pathogenic diseases (Bakker et al., 2007; Lugtenberg and

Kamilova, 2009; Zamioudis and Pieterse, 2011). Some of these bacteria can be isolated from the phyllosphere. Others can be isolated from the anthosphere and the carposphere, as well as from the caulosphere. The majority of these bacterial microsymbionts are however known to colonize the rhizosphere, which is a rich zone of microbial interactions with their hosts (Lugtenberg and Kamilova, 2009). Some of the rhizosphere microflora can also enter into plants and establish subpopulations in various plant parts (Rosenblueth and Martínez-Romero, 2006; Hallmann and Berg,

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3. Orange, Texas

George Lambert Bristol Texas A&M University Press ePub


Orange, Texas

Orange, Texas, was a brief one-year stopover for us. The town is located near the Gulf of Mexico in Deep East Texas on the Sabine River. My snapshot memory says our time there was about crawdads, Brooks and Nellie Conover, a near hurricane, Korea, and “the bomb.”

I am not sure why we left Denton in August 1949. I think it was because Mother, who was still working on her master’s in library science, needed library work to complete her degree, and her dear friends, the Conovers, helped her get a position at Orange High School where Brooks was the head football coach.

We moved into a duplex with the Conovers on St. John Street. For a Texas plains kid, the street was strange: crushed oyster shells with ditches on both sides, brimming after rain (which was often) with crawdads. Being so close to the Gulf, Orange was always wet it seemed. When it wasn’t raining, it dripped, or steam rose from the saturated ground.

Early on, Brooks and Nellie took us to see the mothballed fleet at the naval yard on the river. For what seemed like miles, ships of every sort, World War I and World War II vintage, lay at anchor. Hopes that these would never go to war again changed on August 29, 1949, with the explosion of the first Soviet atomic bomb—followed by the takeover of China by communists. Those two events saturated the newspapers and radio broadcasts. People talked at the grocery store and at Friday night football games. Even my fourth-grade classmates talked about these events, perhaps not intelligently but constantly. We had photos of the bomb and worried about the possibility of an attack. We practiced climbing under our school desks as quickly as possible. Anchors were weighed, and the mothballed ships sailed off.

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12. Landscape, Land Use, and Management in the Coastal Zone of Yucatan Peninsula

John W Day Texas A&M University Press ePub

Jorge A. Herrera-Silveira, Francisco A. Comin, and Luis Capurro Filograsso

To reach the sustainable use of aquatic ecosystems, we must first understand the interrelationship between different physical and biological components controlling the functioning and dynamics that regulate the systems. This ecosystem approach is especially applicable in coastal environments because they are the final destination of all drainage basins regardless of whether the basins are superficial or underground; the hydrological connectivity between inland and coastal marine ecosystems is strong. This connectivity must be acknowledged in all coastal environments analyzed using the ecosystem approach.

In contrast, coastal environments, in addition to the human problem of drinking water supply, have other problems such as rapid urbanization, destruction of wetlands (including salt marshes, sandy beaches, and mangroves), and health issues caused by pollution, collapsing artisanal and industrial fisheries, salinization and pollution of aquifers, siltation and hindrance navigation, increasing muddiness of waters, and decreased biological productivity. All these problems result in coasts that are inhospitable and where sustainable activities are impossible, especially tourism and enjoyment of life.

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21 Tragedy at Lava Falls, 1984-1987

Richard Westwood Utah State University Press ePub

By 1984 Georgie, now at age seventy-three, had made some concessions to age. She seldom led hikes in the side canyons but remained with her boats, and she avoided most of the nighttime partying enjoyed by the boatmen and passengers. Soon after supper, while others sipped the traditional blackberry brandy and coffee, Georgie would slip away to her raft to unroll her pad and sleeping bag. By 8:30 P.M. she would be asleep. But her love of the rapids was as strong as ever.

In August 1984 Ray and Norine “Nori” Abrams embarked with Georgie for a trip through the Grand Canyon. This was Ray’s sixth trip with Georgie and Nori’s second. Ray was almost like a boatman—he enjoyed helping in every way he could. They were a fun couple, both heavy set, but Nori more so.

On the night of August 24 the party camped at Fern Glen Canyon. The next morning they had “egg break” at about 10 A.M. Some of the passengers went on a hike, but Ray and Nori stayed with the boats.1

The trip had gone well up to that point. Their crew was very safety conscious. They made sure everyone wore their life jackets and told them to hang onto the safety lines through the rapids. Georgie always took precautions with passengers who she thought might have difficulty. This included having them switch to a seat on the center pontoon rather than ride on the outside sections of the raft. For added safety she would have the boatmen lash them to their spot with a so-called sling Georgie had devised many years before. The sling was made of rope tied in such a way as to hold the passenger in place in case he or she lost their hand grip on the rope. At the same time, it could be quickly released if necessary. Lud Fromme said, “Georgie, myself, and Jose Couce, the other boatman, practically insisted that Nori switch to the inside section and allow us to put her in a sling.”2

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