Impact of Peatland Clearing on Fish Species and ... - SPLU.nl

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Impact of Peatland Clearing on Fish Species and ... - SPLU.nl

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Fish Species and Population in

Surrounding Water System

By

Mohamad Hanif M. J. 1 , A. Mohammad 2 ,

S. Mariam 1 and P. Bolhassan 2

1

MARDI, Serdang, Selangor, P.S. 12301, 50774 Kuala Lumpur, Malaysia;

2

MARDI Research Station, Sessang, Sarawak, Malaysia

4/7/2007 1


PP75 BACKGROUND

• To gather basic information on the progressive

development ong>ofong> peat land from total forested

areas to cleared and cultivated with crops

• To conduct research on water table situations,

microbiological populations, plant populations,

aquatic species populations, insect populations,

solid wood rot studies among others

• To collate and link data in relation to

environmental effects ong>ofong> development on peat

land forest areas

4/7/2007 2


PURPOSE OF

STUDY

• To determine the

effects ong>ofong> land

clearing ong>ofong> peat

forest on the fish

population in

waterways at

MARDI Sessang ,

Sarawak

4/7/2007 3


• Forty location points

(forested, semi-forested

and open areas) for

sampling

• Traps placed fortnightly

in the morning and

collected in the afternoon

(six hours duration)

• For catfish species, cages

were left overnight and

collected the following

morning

Fish recorded based on

location, number

collected, species, weight

and length

• Sacrificed and stored

frozen for analysis

(chemical and

biochemical)

Methodology

4/7/2007 4


Trapping

4/7/2007 5


Collection

4/7/2007 6


ANALYSIS

• Carcass analysis (flesh

and bones)

• Nutrient contents -

moisture, protein, ash,

carbohydrate and fibre.

• Points temperature,

D.O., turbidity and pH

• DNA prong>ofong>ile analysis ong>ofong>

fish.

• Organic and non-organic

contaminants in water.

Note : All information to be correlated

with weather, environment and

development ong>ofong> field operation

areas.

4/7/2007 7


Sepat (Trichogaster spp.)

Species

Number

Length (cm)

Weight (g)

Sepat

239

5.5 – 13.5

4.0 – 33.5

4/7/2007 8


Keli (Clarias spp.)

Species

Number

Length (cm)

Weight (g)

Keli

115

9.5 – 26.5

6.4 – 197.9

4/7/2007 9


Haruan (Channa striatus)

Species

Number

Length (cm)

Weight (g)

Haruan

71

10.0 – 24.0

7.7 – 100.5

4/7/2007 10


Toman (Channa micropeltes)

Species

Number

Length (cm)

Weight (g)

Toman

72

10.0 – 31.0

14.5 – 235.0

4/7/2007 11


Puyu (Anabas testudineus)

Species

Number

Length (cm)

Weight (g)

Puyu

71

3.2 – 15.0

4.7 – 90.0

4/7/2007 12


Kejungau: Pikehead (Luciocephalus pulcher )

4/7/2007 13


Emplasik: Laga (Betta splendens)

4/7/2007 14


FISH COLLECTED

Species Number Length (cm) Weight

(g)

Sepat 239 5.5 – 13.5 4.0 – 33.5

Keli 115 9.5 – 26.5 6.4 – 197.9

Haruan 71 10.0 – 24.0 7.7 – 100.5

Toman 72 10.0 – 31.0 14.5 – 235.0

Emplasik (Laga) 51 5.5 – 10.5 3.0 – 12.5

Puyu 71 3.2 – 15.0 4.7 – 90.0

Kejungau (Pike) 25 10.0 – 13.5 7.0 – 19.0

4/7/2007 15


CHALLENGES

• Pilferage ong>ofong> fish traps.

• Traps not hardy and

easily damaged.

• Number ong>ofong> sampling

points physically

unfeasible.

• Shortage ong>ofong> support

staff.

• Shortage ong>ofong> amenities.

• Sampling time too

short.

• Dry water beds.

• Hidden dangers.

4/7/2007 16


OBSERVATIONS

• Aquatic species collected generally augurs

with the common fish species available in peat

land waterways.

• The varying sizes ong>ofong> each species cannot

currently be conclusively attributed to

environment factors.

Fish species trapped were ong>ofong> different sizes

according to different sampling locations with

open and exposed water areas yielding less or

no fish.

4/7/2007 17


OBSERVATIONS

• During dry periods, less fish were caught since

traps could not be submerged in water.

• Digging pools in the waterways resulted in fish

trapped but in much smaller numbers and

sizes.

Fish from open areas were smaller and lighter

as compared to fish having canopies or tree

covered areas where the fishes obtained were

bigger and heavier.

4/7/2007 18


FURTHER WORK

Fish sampling – finished (to continue??)

• Points Water Data – undone (proceed?)

• Chemical / biochemical analysis – unfinished

(to continue + training ong>ofong> Sessang staff)

• DNA extraction - to proceed

• Collation ong>ofong> weather information – data from

Sessang station

• Linkage ong>ofong> information with other projects in

research program - ok

• Information dissemination – Seminars,

publications, etc. - ok

4/7/2007 19


RESOURCES

• Laboratory: Excellent space available

• Equipment: Excellent – purchased & shared

• Personnel: Full time (one); Part time(one);

Daily paid (two – sampling days)

• Administration: Excellent backup

• Other resources: Excellent support on ICT,

transport, back up staff

(when needed), researchers

4/7/2007 20


TERIMA KASIH

4/7/2007 21

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