of the watercourses ln the OCP area was held tn Bauako fron 6 to 9 January, 1987.

(1)

WORLD HEALTH ORGANIZATION ORGAI.IISATION MONDIALE DE LA ^SAT{TE

ONCHOCERCIASIS CONTROL PROGRAMME IN I{EST AFRICA

PROGRAUME DE LUTTE CoNTRE LTONCHOCERCOSE EN AFRIQUE DE LToUEST

EXPERT N)VISORY COMMITTEE

Eighth oeet,lng

Ouasadounpu. 15-19 June 1987

Infornaclon

docunent EAC8/ VCU/3

AQUATIC MONITORING ACTIVITIES 1986/1987

The annual oeeLlng

of the

Hydrobtologlsts

ln

charge

of the aquatlc

monltorlng

of the

watercourses

ln the

^OCParea was

held tn

Bauako

fron 6 to 9

January, 1987.

The

collecclon of

entomologtcal and

lchthyologlcal

data was belng contlnued by Ehe naclonal teans

at

t,he

establlshed

rhychm

as ln the past,.

Because

of the late recelpt of

che equlpment ordered

by the

Programne,

the

naclonal teans

of

^Gulneaand

Mall

were noc

operatlonal ln 1986.

However,

ln

che t{eecern OperaLlonal Area daEa oo

the flsh

and entomfauna wae

collected

by

the

oRsroM Eeam

ln

Bamako.

Partlcular attentlon

hae been

pald to rlvere

treaced

wlth pernethrln

and

carbosulfan

ln

C6te

drlvolre

and Ghana. Regardlng

the

lmpact

of the

operaclonal uee

of the

two products

on

t,he

non-target

fauna, carboeulfan aeem6 uo be

leee

to:d.c to

the lnvertebrates

than

perneEhrln.

Carboeulfan _ueed

ln

1985 on

the

WhlEe Bandaoa

durlng

11

larvlc(dlng

cyclee and 1n 1986

on the

lower Bandana

durlng

2O seeks dld

not

show any

lrreveretble lopact.

The entomofauna had recovered

to lte lnltlal

denslEy and

diverstEy

cwo rnonEhs

afcer the

cessatlon

of the

use

of carbosulfan.

Even t,he nacrocrustacea whlch

are very seneltlve to

chat product were nt,111

present.

The

effecc of a Erlal carrled out ln

1986 proved

to

be

rcre

drasE,ic

ln

t,he short, ceru when

the

dlscharge was

very

low.

As regards

flshes,

carboeulfan appears Eo be

mre toxlc ln the

short, t,eru Ehan

per.'methrln. TesEs

are

belng contlnued by

the

Progranmers

hydroblologlcal

Eeam

in order

Eo

reflne the

concluslon.

The development

of

lnsecE

rearlng ln

an apparatuo

for

tesElng

of

IGR6 was

conttnued

ln Banako. After several nodtflcatlone, _the

eyetem that. has been developed appears

to offer

^gpod

eurvlval condlElons.

So

far

cwo IGRa lrere

tested in thls

apParatus.

The Unlverslcy

of Salford carrled

ouE an lndependant,

analysts of

aquatlc

rcnltorlng

daEa

shlch

were revtewed

durlng

Ehe

Hydroblologlstsr

annual meeElng and by Ehe

Ecolo8lcal

Group

durlng lts

annual oeetlng

held ln

Bouake from 23 co 27 Ma-rch, 1987.

A

longterm

consultant. attached Eo che Programners IRU

ln

^Bouakecontlnued Eo

lnvesElgate

the

lopacE

of

any new conpound

or fornulatlon (lncludln g B.E.

H-14) on

the

lnvertebraEe fauna.

Four

short-term

coneultanEs

vlslced the

^OCParea

ln order

co sEudy Ehe Eechnlcal monltor(ng

of

che

fleh

and

lnvertebrate

fauna

ln

Ghana and

ln

Togo and

to

eetabllsh an lnvencory

of flsh

populatlons

tn

waEercoursea

of the watercourses ln the OCP area was held tn Bauako fron 6 to 9 January, 1987.

Infornaclon

of the

ln

of the aquatlc

of the

ln the

held tn

fron 6 to 9

collecclon of

lchthyologlcal

at

establlshed

as ln the past,.

of the late recelpt of

by the

the

of

Mall

operatlonal ln 1986.

ln

the flsh

collected

the

ln

Partlcular attentlon

pald to rlvere

wlth pernethrln

ln

drlvolre

the

of the

of the

on

non-target

leee

the lnvertebrates

perneEhrln.

ln

the

durlng

larvlc(dlng

on the

durlng

not

lrreveretble lopact.

to lte lnltlal

diverstEy

afcer the

of the

of carbosulfan.

are very seneltlve to

present.

effecc of a Erlal carrled out ln

to

rcre

ln

the

very

flshes,

mre toxlc ln the

are

the

hydroblologlcal

in order

reflne the

of

rearlng ln

for

of

ln Banako. After several nodtflcatlone, the

to offer

eurvlval condlElons.

far

tested in thls

of Salford carrled

analysts of

rcnltorlng

shlch

durlng

ln Banako. After several nodtflcatlone, _the