international seminar experience and initiatives to reduce ... · pond aquaculture is traditional...

DAUGAVPILS UNIVERSITY Institute of Life Sciences and Technologies

Department of Ecology

Threats or opportunities? The role of pond

aquaculture in biodiversity conservation in

Latvia

Arturs Skute1, Mihails Pupins1 1 Institute of Life Sciences and

Technologies, Daugavpils

University. Parades street 1A.

[email protected]

International Seminar

Experience and initiatives to reduce environmental impacts and

NGO cooperation possibilities on Daugava/Dvina river basin

22-23 November 2017, Daugavpils, Latvia



Daugava



Latvian rivers’ basins



Daugava’s basin



Aquaculture – targeted cultivation of hydrobionts in

regulated environment

Pond aquaculture – targeted cultivation of hydrobionts in

the pond regulated environment



Pond aquaculture in the Daugava’s basin in

Latvia

• Aquaculture

ponds

complexes



Da

uga

va

Natural water flow



Da

uga

va

Pond water flow



Artificial

food

Clean

water

Pond

hydrobionts Chemical wastes

Hydro-chemical pollution



Invasions



Genetic contamination



Ecological contamination

Native

pond

ecosystem

Aquaculture

pond

ecosystem



Evolutional contamination

Native local evolution

before

Changed local evolution

after



Contamination of future ?

Native future before Changed future after???



Pond aquaculture is traditional type of aquaculture in Latvia. The studies carried

out by us over the last 10 years have shown that all the ponds used for aquaculture

in Latvia can be divided into two groups:

Traditional Ponds (TP) Farming Ponds (FP).

Pond aquaculture in Latvia



Parameters Traditional pond

Farming pond

Area area of 0.1 – 1 ha 5 ha and more

Purpose provision of additional food for

owners

production of hydrobionts for

sale

Use for

recreation

recreation of owners recreation as a product for sale

Methods of

cultivation

extensive intensive

Function homestead pond fishery

Method of

creating

digging damming and diversion of

waters from rivers and streams

Filling precipitation and groundwater streams and rivers

Possibility of

drainage

no yes




Farming pond

Type of

aquaculture

polyculture monoculture

Productivity of

the pond

the owner does not care is the main result of work for the

owner

Motto a hobby a business




Farming pond

Genetic contamination of the local

population by the productive lines of

hydrobionts

no highly possible

Increases biodiversity in itself on the

surrounding

territory

contamination with invasive species no yes

Eutrophication of the environment no yes

Mosaic habitats increases reduces

Typical cultivated hydrobionts Carassius

carassius

Cyprinus carpio,

Tinca tinca,

Carassius auratus

The TP and FP in Latvia differ in principle according to the

described below impacts of the aquaculture on the

biodiversity conservation.



0

20

40

60

80

100

120Zīdītāju izplatība dīķsaimniecībās

% no dīķu saimniecībām

Mammals distribution and density in FP and

TP in Latvia

0

0,5

1

1,5

2

2,5

3Zīdītāju vidējais blīvums

0-Nekad; 1-Reti; 2- Bieži; 3-Ļoti bieži



0

0,5

1

1,5

2

2,5

3Putnu vidējais blīvums

0-Nekad; 1-Reti; 2- Bieži; 3-Ļoti bieži

0

20

40

60

80

100

120Putnu izplatība dīķsaimniecībās

% no dīķu saimniecībām

Birds

distribution and

density in FP

and TP in Latvia



CONCLUSIONS

• The results of the research showed that if the

role of TP for preserving and increasing the

biodiversity in Latvia is predominantly

positive, then the role of FP depends to a large

extent on the strategy and priorities of FP

managing.

• The dynamics of the ratio of the number and

area of ponds in Latvia over the past ten years

shows that the number of TP in Latvia

increases, while the number of FP remains

practically at the same level.

• This allows us to hope for a sustainable

conservation of biodiversity on the

background of the development of pond

aquaculture in Latvia.



• We thank all the scientists, organizations,

photographers, authors for the possibility

of using of their work results.

• Many photos for this lecture were found in

WEB, most of them hadn’t names of

authors or references.

• If you are the author, send please your

info and we will add the reference to you.

• If you are the author and you don’t agree

that your materials are used in this lecture,

contact me please at [email protected] .

We will remove your materials as soon as

possible.

mailto:[email protected]



Thank you for

your attention!

international seminar experience and initiatives to reduce ... · pond aquaculture is traditional...

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