Fieldwork Progress Report

8/10/2019 Fieldwork Progress Report

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Over-exploitation of Reef Fish Stocks in

Bintan Waters

Overfishing or over exploited fishin general define as harvesting

the fish resources faster than it

natural replenish.

In 2007, the statistics shows that

the estimation of reef fish stocks

in Bintan waters which is 3390.80

MT/year has been exceeded.

The increasing of live reef fish

trade and the good price has put

pressure on these species. Dompak

Penyengat

Senggarang

Kelong Island

Mantang

Kijang

Kawal

Beralas Islands

Sakerah

Berakit

0 10 205 Miles

Is it due to the aquatic

environment parameters

decreased, sea surface

temperature and sea surface

chlorophyll, or has been over

exploited?


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5/12

Timeline

PERIOD

ACTIVITY 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4

Proposal writing

Proposal defense

Proposal update

MODIS data

collection

Proposal revision

Image Processing

In situ

measurement

Laboratory

calibation

Assessment and

analysis

Thesis writing

Mid term

presentation

Final test

Revision

August September October November December March April MayJanuary February


6/12

Research Phases

Image Processing and Analysis

Download Aqua MODIS Chlorophyllconcentration and sea surface

temperature (monthly) 2005-2012

Prepared image of study area to clip the

location

Identify the distribution of chlorophyllconcentration

Identify the and sea surface temperature

distribution

Analyze the correlation of chlorophyll

concentration and surface temperature(in progress)

January 2006

March 2012


7/12

Research Phases

Field Measurement

(in situ) Collecting in situ data for

sea surface temperature

Calculate the chlorophyll

concentration from water

sampling from ten

station.

No StationReplicat

e

Temp

(oC)

Wave length Extract

Volume

Cuvvet

widhtValue

Average

Value750 665 645 630

1 Penyengat I 24 0.007 0.014 0.007 0.01 10 1 0.139 0.806II 24 0.003 0.014 0.01 0.014 10 1 0.130

III 25 0.199 0.246 0.254 0.266 10 1 2.148

2 Dompak I 24 0.003 0.014 0.01 0.014 10 1 0.130 0.891

II 24 0.028 0.093 0.116 0.138 10 1 0.734

III 25 0.137 0.212 0.227 0.251 10 1 1.810

3 Tembeling I 24 0.041 0.088 0.109 0.125 10 1 0.703 1.232

II 24 0.024 0.039 0.107 0.115 10 1 0.151

III 23 0.196 0.33 0.35 0.377 10 1 2.842

4 Kelong I 24 0.014 0.037 0.039 0.051 10 1 0.307 0.510

II 25 0.036 0.08 0.094 0.113 10 1 0.647

III 25 0.032 0.066 0.019 0.117 10 1 0.577

5 Mantang I 24 0.009 0.023 0.028 0.038 10 1 0.177 0.132

II 24.5 0.002 0.01 0.008 0.01 10 1 0.092

III 24.5 0.003 0.018 0.023 0.036 10 1 0.128

6 Kijang Coastal I 24 0.447 0.666 0.673 0.672 10 1 5.903 2.667

II 24 0.029 0.066 0.094 0.123 10 1 0.470

III 24 0.099 0.193 0.209 0.242 10 1 1.626

7 Kawal I 24.5 0.294 0.512 0.585 0.631 10 1 4.289 2.776

II 24 0.259 0.437 0.517 0.554 10 1 3.616

III 24.5 0.035 0.076 0.139 0.198 10 1 0.422

8 Beralas I 24.5 0.457 0.502 0.489 0.501 10 1 4.481 1.651

II 24 0.013 0.033 0.045 0.075 10 1 0.219

III 24.5 0.029 0.041 0.062 0.1 10 1 0.254

9 Berakit I 24 0.093 0.212 0.242 0.266 10 1 1.770 2.009II 24 0.221 0.333 0.364 0.41 10 1 2.812

III 24 0.098 0.194 0.27 0.322 10 1 1.446

10 Sakerah I 23.5 0.058 0.104 0.128 0.143 10 1 0.839 1.891

II 24 0.014 0.025 0.032 0.04 10 1 0.192

III 24 0.413 0.537 0.572 0.598 10 1 4.643


8/12

Research Phases

Description of Study Area

(Literature review) Collecting data related to land use

and spatial planning in study area

Collecting data of coral reef

distribution and status in study area

Map of land use planning and future

development

Several information from local

government has been obtained


9/12

Research Phases

Validation of Image Based

Data with in situ data Validation check: RMSE test by

comparing the image based data and

field measurement data (progress).

Calculate Ocean Primary

Productivity (NPP) Can be done by two way:

1. Using VGPM equation

2. Using Ocean Productivity Data

from Oregon State University (has

been communicate with OSU research

assistant).

2

1 )(1

insituimage

n

i aChlaChln

RMSE

irreua

B

opt xDxZxChl

E

ExxPPP

1.4

66125.0

0

0


10/12

Research Phases

Status of Reef Fish Stock

Exploitation Marine fish statistic from 2005-2012

(production, illegal fishing and

destructive fishing practices)

Data of potential and total allowable

catch for reef fish species.

Data of status of coral reef habitat for

reef fish in study area.


11/12

Research Phases

Hazard Assessment and Risk Analysis

Literature review on threat information for reef

fish species to identified potential hazard (in

progress).

Descriptive analysis based on status of reef fishhabitat, existing data reef fish catch data and

spatial planning on study area to formulate

recommendation plan for sustainable fish

management (in progress).


12/12

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Fieldwork Progress Report