Conservation of animal resources
Transcript of Conservation of animal resources
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Conservation of Animal Resources for
Sustainable Productivity
R. C. SihagDepartment of Zoology & Aquaculture
CCS Haryana Agricultural University
Hisar-125004
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Productivity
Rate of weight produced by a population
orMaximum yield
that can be harvested from a population repeatedly
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Important1. Ecosystem stability depends upon the
complexity of ‘Food webs’ which in turn depend upon the number of ‘Food chains’ in that system.
2. Animal productivity is secondary productivity
3. Productivity along the food chain follows the second law of thermodynamics
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American Bison
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Keribou
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Wilder beast
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Zebra
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Deer
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Giraffe
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Blue whale
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School fishes
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Sea Lion
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Fur Seal
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Otter
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Catla
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Sepia
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Turtle
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Python
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Production Efficiency of Earth vs Support to Human population
∞ IE (Incident solar energy/unit area/yr)
∞ ALW (crop area, land and water)
∞ % RE (Radian energy that is transformed in to chemical energy
∞ _____________1__________________ EM (Energy required by average man)
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Energy Requirement of Human beings
70 kg man = 1700 kcal/d
Asian man = 2070 kcal/d
Generous International estimate
= 3000 kcal/d
or 106 kcal/yr
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Conversion Efficiency of Various Crops and the Capacity of Earth to Support Human beings
Crop Area required to support one man / yr (sq m)
World population that can be supported by earth
Algae 12,5 5 9.1x1012 (910 B)
Potatoes 0.10 600 7.6x1010 (760 B)
Grain 0.05 1200 3.8x1010 (380 B)
Prunes 0.04 1500 3.0x 1010 (300B)
Milk 0.04 1500 3.0x 1010 (300B)
Pork 0.015 4000 1.1x 1010 (110 B)
Eggs 0.002 30000 1.5x 109 (15B)
Current world population =6.5 B
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World Production of Major Foods
Commodity Production
(metric tons)*
Wheat 500
Rice 400
Milk 650
Meat 130
Eggs 20
Sea food________
*Total arable land
____46_________
= 4.56 x 109 ha
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Relative Importance of Animal and Vegetable Proteins in Different Parts of the World
(per person)
Sr.
No.
Region Total protein (g/d)
Animal protein (g/d)
1. North America 93 66
2. Western Europe 25 39
3. Mexico 68 20
4. South Asia 52 7*
5. For East including China
61 8*
*Mainly vegetarian and suffer from malnutrition
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Conversion Efficiency of Marine Foods
Sr.No. Source Energy/100 g
1. Cod 70 kcal
2. Salmon 92 kcal
3. Sardines
(canned oil)
266 kcal
4. Shrimps
(dry canned)
120 kcal
5. Tuna (canned) 255 kcal
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World Potential of Animal Resources
a) Safe estimate of CE = 100 kcal/100 g
b) World catch of marine food = 46X109 kg = 46X1012 kcals
c)This will support = 4.6x107 persons/yr = 46 million persons/yr
d)Total marine potential = 1 billion persons/yr (20 times)e) Total terrestrial potential = 1 billion persons/yr
f) Total potential for = 2 billion persons/yr
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Exploitation of Animal Bioresource
What is Important ?
Knowledge of Knowledge ofPopulation Resource
Ecology Exploitation Theory
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Causal Pathways to Regulate Animal Productivity
- Natality
- Mortality
- Individual growth rate
- Population dispersal
These are different in
different animals
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Population Growth in an Unlimited Environment
dn --------- = r n dt
This is a case of Exponential Growth Form
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Population Growth in a Limited Environment
dn ---- = r N (K-N) with a limit at K dt This is a case of Sigmoid Growth Form
When N = K
dn ---- = o dt
Human population does not follow these patterns
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Effect of Age on Reproductive Rate of Bison
Age (yrs) N % pregnant
2 160 36
3 92 52
4 120 37
Young adult 95 40
Adult 192 28
Aged 74 8
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Effect of Age on Reproductive Rate of Herring
Age
(yrs)
Mean
Fecundity
3 14620
4 17679
5 20482
6 23102
7 25580
8 27931
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Effect of Age on Growth Rate of PlaiceAge (yr) Annual increase in wt (%)
2 15.4
3 22.1
5 13.6
7 12.7
9 11.4
11 2.7
13
8.1
15 5.5
17
-3.0
19 -4.2
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Effect of Age on Dispersal of South Bay Small Mouth Bass
Age
________
Av. Distance Traveled /
day (miles)
________________________
2 0.014
3 0.050
4 0.075
5 0.088
6 0.105
7 0.142
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Effect of Population Density on Survival of Swiss Starling
Clutch size No. of young ringed
% recovered after
3 months of flying
2 328 1.8
3 1278 2.0
4 3956 2.1
5 6175 2.1
6 3156 1.7
7 651 1.5
8 120 0.8
9 28 0.0
10 28 0.0
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Catastrophic Over- harvesting ofPelagic Fur Seal
Year No. of vessels
Catch Catch/ship
1994 37 55686 1.53x103
1995 59 56291 0.93x103
1996 87 43917 0.51x103
1997 38 24321 0.64x103
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Effect of Over- exploitation on Adult Ratio of Guppy
Period
(weeks)
Exploitation
rate (%)
Populations
A B
Control
40-76 25 0.46 0.49 0.84
79-118 10 0.54 0.56 0.85
121-148 50 0.20 0.27 0.84
151-172 75 0.19 0.24 0.86
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No. of Bisons killed in America*
Year No. of bison
1868 1,500,000
1869 2,500,000
1870 5,000,000
1871 6,000,000
1872 7,000,000
1873 6,000,000
1874 3,000,000
*In 1883 Yellowstone park was established
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No. of whales caught by different countries (1960-61)*
Country Whales caught
Japan 19891
Norway 12829
USSR 11184
UK 4551
Peru 3602
South Africa 3352
Netherlands 2212
Australia 1937
Falk land Islands 1262
Brazil 1083
Portugal 515
USA 442
*Total world quota 16000
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Effect of Diseases on Abundance of Herron Larvae in the Western Gulf of
St.Lawrence
Year Catch/sampling
1982 1897.8
1983 855.9
1984 127.4
1985 407.8
1986 31.6
1987 32.5
1988 9.1
1989 1.5
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Animal Bioresource A Renewable Crop
Scientific Non-scientific
Exploitation Exploitation
Sustainable Not sustainable
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Scientific Exploitation
Breeding stock Surplus stock
To conserve To exploit
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Surplus Stock
Depends on 3 factors
1.Protection of 2.Proper 3. Provide Breeding Regulation of Biological Stock Animal Harvest Needs
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Breeding Stock
3 Enemies
Man Natural predators Diseases
Entertainment Take good amount , All types, have Food Physical control on variable
effects, Fiber biological basis sometimes very Enemies of severe, keep agriculture watch & remedy
Put restrictions through legislations
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Annual Harvest
Unregulated Regulated
Uneconomical on Profitable and
long term basis sustainable
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Sustainable Harvest
3 Factors
Exploitation Exploitation Exploitation Time Duration Extent
(out of ( short ) (Based on breeding population season ) build up characteristics)
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Biological Needs
Food Shelter/Habitat Mate
For migratory Don’t disturb habitat Guarantee a population animals e.g. Bovine-Gregarious- e.g. over critical level birds, mammals Open habitat 5 pairs of Antilop
Don’t disturb Feline- solitary- 40 acres for Ruffed food chain Close habitat Grouse
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Illogical introduction of exotic species
1. Lamprey in Great lakes
2. Rabbits in Australia / France
3. Tilapia in Udaipur lake
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Equilibrium Harvest and Sustainable Productivity
i) Follow ecological principles
ii) Aquatic ecosystem
Ce = KF - F2
r
iii) Terrestrial ecosystem
dn ---- = r N (K-N) with a limit at K dt
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Climate Change
Long term significant change in expected pattern of
average weather of
a specific region
over a specified
period of time
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The diminishing Glaciers
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Polar Bear
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Mama! Is this our last laugh?
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Is this my food?
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Are you sure, this is the last snow fall?Japanees Macaque
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Is any place on earth left for new inhabitation?
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For how long Water will fall?
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The diminishing picturesque of Mountain terrains
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Will you stop destroying my bamboo forests ?
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Mama! Ground is not safe?
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Where are my salmons?
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Will the dawn bring some hope?
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Is there any deer left?
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Will mama bring food, don’t know?
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You don’t allow me even to dwell in water. Wait, I will teach you a lesson
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Can Termites alone fill my belly?
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Papa! How safe is our habitat?
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Do you hear my claps?Don’t spoil my habitat
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No coral reef, where to feed and breed?
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Man is coming, I need shelter
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Mr.! I had warned you that this is my food
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Chick proposes, Man disposes
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Hurray! This time I could save my life
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Still you are stronger
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Reasons of Climate Change
- Deforestation- Burning fossil fuels- Coal mines- Methane production
- NO2 production
- SO2 production
All these lead directly or indirectly to “Green House Effect”
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Effects on Terrestrial Ecosystems
- Increase in temperature 2.5 - 10o F by 2100
- Erratic rains
- Increase of temperature by 3oC will increase sea level by 1 m
- Terrestrial area will decrease.
- Ramifications many
- Erratic rains ---- more floods and more draughts--- less agricultural production.
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Consequences
- Decrease in Agricultural and natural plant production
- Temperature 3oC increase means 15% decline in wheat and rice production alone
- More defoliation of forests
- Less quantity and quality of feed available to the animals
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Effect on Animal Health
- Poor nutrition- Decreased immunity- Effect on ecological distribution of
vectors and diseases - Appearance of new heat related
diseases e.g. Anthrax, cholera, blue tongue virus, Tests fly, helminthes, snails, other foot and moth diseases etc.
- Their movement towards polar region.
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Effect on Animal Productivity
High temperature/high humidity
- Hyper- thermia in animals/heat stroke especially in bovids and aquatic animals
- Altered hormonal levels- Low sperm production in males and low
spawn motility- Reduced conceptions- High embryonic deaths- Less feed intake- Decreased milk production- Decreased egg production
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Effects on Aquatic Ecosystems
- Increase in aquatic temperature
- Increase in aquatic pH
- Increase in aquatic eurtrophication
- Decrease in aquatic dissolved oxygen
- Decrease in aquatic faunal productivity
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Consequences
- Decreased Zooplankton survival
- Increased coral weathering
- Increased loss of land
- Decreased animal productivity
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Corrective Measures Against Climate Change
1. Lower down CO2 production
2. Lower down methane production
3. Lower down NO2 / SO2 production
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Lord Shiva will leave the mountains and cobra snake will be left alone?
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Barbeque doll will stand in the wilderness
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Man will plough the deserts with the help of dogs
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Dogs will force you to mend your ways
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Thank You