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116 Cards in this Set
- Front
- Back
census
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complete count of individuals in a population
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estimate
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made on the basis of a statistical sample
done by: 1. counting inanimate objects (droppings, dens, etc.) 2. counting animals |
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index
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quantitative measure of a population that compares the relative abundance between areas or changes in abundance from one time to another
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model: conceptual value
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forces the researcher to think about population dynamics in new ways
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model: developmental value
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forces the researcher to become aware of the usefulness of various types of information necessary to construct an accurate model
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model: output value
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model may be useful in predicting future courses of the modeled population or the effects of manipulation of the population by altering the environment or rates of harvesting
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stable population response
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respond to the carrying capacity of the habitat BEFORE food becomes limiting (typically K-selected species0
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irruptive populations
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seem to be largely unpredictable
population changes are usually attributed to weather and climate and resultant vegetational changes |
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3-4 year cycle
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cycle found in simple ecosystems
fewer species to give the system stability associated with tundra species include lemmings, voles, snow owl (other terms in syllabus) |
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9-10 year cycle
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cycle usually found in Boreal Forest
best evidence from North America species such as snowshoe rabbit, muskrat, and grouse |
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interaction principle
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the genotype (inherited genetic material) and environment (complex of climatic, edaphic, and biotic factors) both impact the phenotype (summation of observable structural and functional properties)
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genotype
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genetic material (inherited) and expression in an individual (innate)
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phenotype
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summation of observable structural and functional properties
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inclusive fitness
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the sum of an animal's fitness as measured by personal reproductive success and that of relatives with those relatives devalued in proportion to their genetic distance
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habitat selection
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where animals feed, breed, and carry on other important activities depends on intra-specific and inter-specific relationships + environmental factors
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cognitive map
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innate map or matrix of suitable habitat
choice made according to degree of fit |
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direct assessment of food supply
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assess the population level of the food supply and adjust habitat and breeding selection accordingly
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negative feedback mechanisms
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lack of negative cues (and presence of positive cues) work to cause avoidance or selection
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monogamy
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one male with one female
may last one season or many years |
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polygyny
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two or more females per male
dominant system in mammals |
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polyandry
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two or males per female
not common in vertebrates common in insects successful for some birds |
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promiscuity
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indiscriminate mating
no pair-bond or the pairing lasts only as long as copulation very common system Lek breeders follow this system |
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Lek breeding
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"playground" breeding
specific breeding ground defended by the males most desirable males in center |
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ultimate factors
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food, water, cover, disease, predation, etc.
factors that stop the "J" curve growth and push the population to an "S" curve distribution |
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proximate factors
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psychological and behavioral population limiting factors that often come into operation before starvation and other ultimate factors limit the population
*behavioral hierarchies *territories *active regulation |
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crop
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collection chamber of ingested food
(fowls) |
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glandular stomach
proventriculus |
true stomach that secretes enzymes to initiate digestion
(fowls) |
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gizzard
ventriculus |
muscular stomach capable of strong contractions
storage of ingested grit that aids in the physical breakdown of food |
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cecum
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plural- ceca
microbial digestion and bacterial decomposition of fibrous food produces darker droppings (fowls, enlarged in herbivore monogastric mammals) |
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stomach
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area of digestion of ingested food
(monogastric mammal) |
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small intestine
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absorption of water and digested protein
(monogastric mammal) |
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large intestine
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aids in further digestion and absorption
(monogastric mammal) |
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rumen and reticulum
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80% of the capacity of the stomach
main fermentation vat where billions of microorganisms break down the relatively indigestible food components (ruminants) |
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omasum
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acts as the filter pump to sort liquid and fine food particles
water, minerals, and nitrogen absorbed here (ruminants) |
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abomasum
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true stomach
only location in the digestive system that produces gastric juices (ruminants) |
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foregut digestion (FG)
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rate limited
rumen fills and they have to stop and chew cud |
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hindgut digestion (HG)
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spend more time foraging
not as rate limited cecum and colon involvement |
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cecaphagy
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the eating of cecal droppings
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copraphagy
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the eating of feces
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guzzler
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man made rain trap
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macro-nutrients
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Inorganic materials required in relatively large quantities (3.5-4%)
1.structural elements 2. enzyme activators or components 3. regulators 4. produce and regulate energy |
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micro-nutrients
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Inorganic materials required in VERY small quantities
1.structural elements 2. enzyme activators or components 3. regulators 4. produce and regulate energy |
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Volatile Fatty Acids (VFA)
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products of microbial breakdown of sugars and non-sugar carbohydrates in the stomach and cecum of herbivores
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crude protein
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the measure of total protein percentage
^ (want to MAXIMIZE) |
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crude fats
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the mixture of fat-soluble material
v (want to MINIMIZE) |
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Nitrogen-free Extract (NFE)
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carbohydrates, sugars, and starches
^ (want to MAXIMIZE) |
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Feeding Efficiency (FE)
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(Net energy (Kcal) spent securing food)/ (Net energy (Kcal) obtained in food gathered)
*the closer to 0, the better |
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Preference Index (PI)
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(Relative % dry-weight of forage in diet)/(Relative % dry-weight of forage in habitat)
a behavioral characteristic |
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palatability
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a characteristic of the food (e.g. bitter or sweet)
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euphagia
nutritional wisdom |
instinctive tendency to select foods for their specific nutrient content
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hedyphagia
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select foods to minimized unpleasant and maximize pleasant taste, olfactory, and/or other attractions
the "popcorn effect" |
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learned aversions
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based on a learning based model with foods placed into 4 basic categories according to experience:
1. familiar-aversive (illness) 2. novel (new) 3. familiar-safe (well-being) 4. familiar-positive (getting well & feeling better) |
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rate limited feeding
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foregut (FG) and ruminant digestion
rumen fills and they have to stop and chew cud |
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Energy use- feces
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25%
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Energy use- urine
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5%
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Energy use- methane
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5%
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Energy use- heat increment (digestion, metabolism)
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48%
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Energy use- maintenance (heat for constant temperature)
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12%
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Energy use- overall heat production (heat increment + maintenance)
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60%
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Energy use- tissue + reproduction
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5%
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Energy use- net energy for production
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5%
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Energy use- net energy
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17%
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hydroseral wildlife
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adapted to wetlands
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mesoseral wildlife
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adapted to moderate moisture
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xeroseral wildlife
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adapted to deserts
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low-successional wildlife
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species dependent on annual grasses and forbs as well as annual agricultural crops
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mid-successional wildlife
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species associated with succession induced by disturbances such as fire, logging, livestock grazing as well as other factors
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climax-successional wildlife
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many threatened and endangered species
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habitat unit size
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minimum unit area required by each wildlife species
includes daily and seasonal ranges of the individual and population |
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interspersion
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mixture of habitats in a patchwork of food, cover, water, etc.
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edge
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boundary where one kind of biotic community (or land use) ends and another kind starts
increases and interspersion increases |
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ecotone
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the area were adjacent communities blend (usually gradually)
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covert
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protective cover area where two or more vegetative types come together or a corner of less than 120 degrees occurs
unusually good habitat for wildlife |
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Objectives of Wildlife Management
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1. retain existent beneficial habitat factors
2.add or replace missing but essential habitat factors 3. remove existent harmful factors within the habitat 4. provide for population regulation of wildlife featured in the management plan by natural means or induced factors |
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disease
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a lack of health
a disturbance to the normal function or structure of an animal |
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etiology
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the science dealing with causes of disease
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causative agents
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usually infectious, parasitic, toxic, physiological, nutritional, congenital, and degenerative factors
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pathogens
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etiological agents that include bacteria (microscopic), viruses (sub-microscopic infectious agents), rickettsias, parasites, fungi, etc.
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enzootic
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low but chronic level of disease occurrence in a single population
normal |
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epizootic
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acute outbreak or expression of a disease
cause for concern |
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zoonosis
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diseases that may be shared by man and animals
(e.g. rabies, tularemia, influenza, brucellosis, plague, hantavirus, mad cow disease, etc.) |
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Epizootiology Effect
H |
host
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Epizootiology Effect
P |
pathogen
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Epizootiology Effect
E |
environment
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Epizootiology Effect
I |
interaction
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Epizootiology Effect
V |
vector
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Epizootiology Effect
D |
dispersal
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Epizootiology Effect
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H+P+E+I+V+D
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General Adaptation Syndrome (GAS)
Adrenal Pituitary Stress Syndrome Selye Stress Syndrone |
set of nonspecific physiological adjustments made by the body in order to maintain homeostasis when confronted by stressors
(look at graph on syllabus p.69) |
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stress
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adrenal-pituitary imbalance
1. alarm 2. resistance 3. exhaustion |
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shock disease
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exhaustion phase of stress
mortality |
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predation
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the action of an organism that depends in total or in part on killing another animal for its food
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threshold of security
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that low level of population density of the prey species at which predators no longer find it profitable to hunt the prey
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pinch period
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that period of the annual cycle (seasonal) when the factors necessary for life are least favorable
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functional response (predators to prey)
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EATING
more prey eaten as the density of prey increases little if any functional response below threshold of security |
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numerical response (predators to prey)
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DENSITY
as density increases, the density of the predator(s) may also increase no numerical response below threshold of security generally a "lag" in response to prey density inverse response when prey is 1. unavailable 2. distracts the predator |
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sport hunting
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view that hunting is a sport
often associated with sportsmen organizations |
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maximum sustained yield
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the largest average harvest that can be taken continuously from a population under existing conditions (1/2 of carrying capacity)
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optimum sustained yield
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a management concept since a segment of the population objects to having animals managed for maximum harvest
1. greatest overall benefit to the nation (food + recreation) 2. prescribed as much on the basis of maximum sustained yield as modified by economic, social, or ecological factors |
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Adaptive Harvest Management (AHM)
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new approach that applies the flow of new data to continually update two or more competing hypotheses or models on population control
weight increases for model that consistently performs best |
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zone of surplus
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the number of prey species that can be removed by predators without having a negative impact on habitat sustainable numbers (unless occurance of extreme event) and may even be beneficial to keep prey population viable
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Reproduction Inversity Principle
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if efforts to remove are intensive, the number of viable embryos actually increases
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conspicuousness
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attracting lots of attention
good- may demonstrate particular characteristics (e.g. high jumper) that cause predators to avoid them bad- may attract undue attention due to a disadvantageous characteristic, attract predator |
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buffer species
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second choice of prey that a predator moves on to when prey of predilection isn't as available
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generalist
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a predator with diverse taste in prey
many different options |
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specialist
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a predator that focuses on specific prey
few options |
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market hunting
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harvest (with a gun, bow, or trap) of wildlife in order to sell the animal or its parts (pelts, gall bladder, etc.) for money
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subsistence hunting
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hunting or otherwise harvesting of wildlife for personal use or sale
matter of life or death |
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Dr. Albert Schweitzer
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anti-hunting activist
"reverence for life" |
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Cleveland Amory
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president of the Fund for Animals
believed hunters don't pursue wounded game like they should |
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PETA
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People for the Ethical Treatment of Animals
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ALF
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Animal Liberation Front
violent, illegal group |
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HSUS
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Humane Society
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proxy hunting
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"hunting" through our use of meat and other animal products obtained by other people's harvesting of animals
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secondary compounds
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plant chemicals used as defenses
called secondary because it's not their primary metabolic function direct effect- toxic indirect effect- alter efficiency |
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hedging effect
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physical defense for plants
grow thickly with new growth on the inside of the plant |