MOREEEEEE

MOREEEEEEEEEEEE

Fecundity

genetic material / individual

fertility

births / individuals

Exponential growth

under ideal conditions there can be unlimited growth

H

inflection point of logistic growth

MSY

Kr/4

OY

economic, social, ecological

greatest benifit

birth rate 7

age at sexual maturity

gestation time

sex ratio

number of young / female

mating system

% of breeding females

nutrition

Sex ratio

number of males / 100 females

actual birth rate

sex ratios

age and fecundity

additive

causes immediate reduction in population

mortalities that have equal impact upon a population

• a = m + n

compensatory

• Hunting is considered by wildlife managers to be a compensatory mortality

  • They would have died from something else (disease, starvation, etc.)

• does not change natural mortality, changes mortality from hunting

• a = m + n – mn   

Concerns about population data

sample bias

sample error

external

density independant

density dependant

intrinsic

disperal

hunting vulnerability

habitat selection

self-limiting behavior

genetic variability

birth rates

survival rates

PrOACT

problem

objectives

alternatices

consqeuences

tradeoffs

setting limits for wildlife harvest

reproduction speed

reproductive age

K

Ne

MSY

OY

Adaptive Harvest managment

data input

current conditions

annual updates

wildlife harvest rates: main goals 2

hunting is consistent and sustainable

decision making is transparent and replicable

art or science

aldo leopold thought it was an art

it is an integration of wildlife science with value-based judgment

harvest considerations 2

demographic

• age structure 

• sex ratio

genetic

• high valued attributes

• sex preference

wildlife managment main objective 4

max ecological benefits

minimize cost

public and private benifits

facilitate cultural values

impact of harvest

lower density

lwoer bidy size

lower age

lower fecundity

lower production

kills vuneral species

affects sustainability

proimity of source to protected area

easy outsider acess

proximity to market

sustainable harvest

no decline in pop

density not reduced

ecological role maintained

support human needs

human factors

human pop density

hunting tech

hunting proficency

use of domestic animals

goals of wildlife harvest

no constant decline

no vunerable populations

maination ecological role

species richnedd/density

primary productivity

nutrient cycle

harvest maintained

wood yield maintained

similar to 1890

technology driven extinctions of big game

90% of large fish

80% of large mammal

5 actions

regulations

increased enforcement

political will

consumer action

protected areas

MSC

ID sustainable fisharies

could be shady

alaska

coast guard

smaller fleets

short seasons

mitsubishi

own 60% of world’s catch of blue fin tuna

buying and freezing fish

mediterranean

10k

15k

29k

61k

magnuson act

need to fight against the commies

senegal

alck of social jsutice

half of european catch

illegal!

shrimp

farm

• cheap

• destroys mangroves

• fish meal

wild

• expensive

• regulated