159 lines
5.1 KiB
Plaintext
159 lines
5.1 KiB
Plaintext
estuaaane land deseal at alalll ampaundanene Silmlly
|
||
is tantaolled by lined byrpass eanals and sea wens eaa
|
||
locks sash aae gaaded to suat pmud eonda anas, ea a
|
||
salanaty mos: as established In mlx speeles as diverse
|
||
as ealp and mullet, Wheae lade and sneaens antelaet, as
|
||
an some Hawaiian lash pundS, bath taeshwatea and
|
||
mannespeeles eahbesultavaled lnone pond senes
|
||
|
||
bnel ammeesalan ln sail wales as an old aemedv lur
|
||
aeduealag hangal disease an lteshwalee lash
|
||
|
||
|
||
|
||
FLOW
|
||
Even very anodesl new shmulates gaseous eaehnnge,
|
||
phlnbsynlhesls, and theaeloae gaaawlh an plants up tea a
|
||
level wheae melhanleal damage by tuabulenee ean
|
||
lteeaae How an hmdrnch waleas aneaeases yaelds tat
|
||
beyand ltlat possible an stall ponds, but meal staeams dta
|
||
anal have heavy namrll load yields unless lhey are
|
||
leatallsed lat mamated, and lhen a ymblem ul slaeam
|
||
eloggang walh aquane weeds ean aeetae, neeessitatang
|
||
(anl by nulala, glass carp lWhile Amur ealpi ot
|
||
mathea ellielent herblvom nae ulhee gteal advannge
|
||
0! flow as In the aaygenatian al walee, eathea via a
|
||
"Flawfunn , aelalen iripuae ml, or series ol llppled
|
||
lalls at wens ln the slaeana bed
|
||
|
||
the balanee we would hide in aehaeve ln llow as in
|
||
maintain sullaelenl llllw lea amnan and vagaaeus plant
|
||
gmwtta, but to aestalel Haw to a level where we do nlal
|
||
sullel lapld leaehllag ol soluble numenls and ealeaaam
|
||
rot this aeasan we nflm pape at ehannel new tn hsh
|
||
and aeaeaee aaeas aaahea than walkane an the stteam
|
||
llsell, whele noods an alleet us an sevetal obvlollsly
|
||
deleteaauus ways aaaagmg lmm lash losses is physaeal
|
||
damage in stauetuaes. and a wlpernul at balaneed
|
||
lenillsew an waters. In pends we may hold bath now
|
||
let a lew days to allaw rem sea upDke, lhen aesume
|
||
lilaw tat nelataon
|
||
|
||
13.4
|
||
|
||
CHOICE OF FISH SPECIES
|
||
(VARIETXES, FOOD, HEALTH} AND
|
||
FACTORS IN YIELD
|
||
|
||
SELECTION FOR EFFICIENT FOOD CONVERSION
|
||
Fish llaw on lhe laephle seale, these ealang planlltoel
|
||
algae, ot vegetation, aae padduled al haghea yaelds For
|
||
example lal ponds used aae lealalasedl we ean
|
||
teasenataly eapeea a maaamuan plodueladn/ha/yeaaol
|
||
|
||
saga la paedatenl ,
|
||
|
||
Catfish lannlnaa aaaet
|
||
|
||
bluegall lan lnsedxvmz}
|
||
|
||
lava nlapu (a plankton leedetl
|
||
|
||
l9wlllgk, most
|
||
|
||
obviously, at out shuaee was let one species, it would
|
||
be let Tllapila However, aeal-lale lesls must be earned
|
||
(“H as some al lhese neal sndees or yaeld ean be
|
||
aeveased xl Image as supplied aa pelleted lood paevided
|
||
Farh and must be made undel the Food management
|
||
sehedule palaplased beeause lash ean harvest dalleaent
|
||
|
||
|
||
|
||
|
||
|
||
A70
|
||
|
||
leads male aa less eliaelenlly that example, al we add
|
||
m-lleieal mad the yields ale
|
||
|
||
clttalh
|
||
|
||
bluegill g
|
||
|
||
{Rlvrrsmg lhe nadea lound an letlllased pmlds aniyt
|
||
Yields In this ease depend un the teed type
|
||
|
||
tlavang selected a sel al names an this way, what ean
|
||
wedn abeua t'inllllun wllhan specles’
|
||
|
||
ll we sloele a high densaty at hngeallngs at one size
|
||
imilllm/hal, and leed lhtse lash. then we ean net
|
||
laut lhe pond shes a lens weeks tn months and seleel
|
||
only the laagea hsh as blood ulxk, be as an "ellaeienr
|
||
vanety Allea only (me yeatol seleea-len. bass langeslmgs
|
||
lmm sueh laskgmwing sleams elanvelted lood al an
|
||
ellaeleaaey at 1.“, wheleas unseleeted nsh mayeeled at
|
||
beam 73:! average, and the waasl eases at 2‘ 2.l—a
|
||
range ot metabalae ellk‘lzncy gee-let than the
|
||
dlllelenees tealeeaa speeiesl ls gle, I966)
|
||
|
||
in ponds. and paslaeulaely whele we eaase lash in
|
||
hateheeaes, ot whele the wales supply as hu- ol llsh and
|
||
then daseases, we (in both seled and ensuae stoeh hee
|
||
ol exlemal paaasates and antenatal paltaogens, by dose
|
||
attention loeleansang eggs and lay
|
||
|
||
lhe aesulls m ponds (in be ta double lhe number ol
|
||
lash gaowang la anahleaty ot marketable 51:: Thus, the
|
||
film laealaas above gm‘ guidelines la la. ng lash yields
|
||
by seueaal dadels ol anagnalude eels aae usually eaughl
|
||
at sea laselvelsl lea this mason
|
||
|
||
llaeld meaease lat ltom 404mm ale aehaeved in a
|
||
pond lay the iudlealaals adanaalaale at speeles Sumc
|
||
eaaa-nples 1mm Swangle llabsl ale glvell hele, and male
|
||
wall he gaven as mmplvs at lmdfllmul syslems latea
|
||
Huweven it i. a sensable llantal appntaeh to lay to walk
|
||
nut whal son ol lunenphs any species an a pelyeallluae
|
||
shlauld setye slam» at these are-
|
||
|
||
|
||
|
||
|
||
|
||
RAPID usz omlmumls
|
||
'naas selves lwa purposes the llast tla laa any lenallseas
|
||
we may add, and the second (0 eanveaa wasles
|
||
paaadueed by dense slpellang at alhel lash ideal species
|
||
ale [hm lhat bleed an panda, gnaw last, and eonyeaa
|
||
dwmposus an laod aellet slall al lhey form a ganup
|
||
whleh doesn‘t llv oll las lnseels deal at migrate out pl
|
||
the pond lhls- leeagsl They lheea aemaan as hsh lood let
|
||
the young pan lash whaeh aee slewly gnawing up
|
||
|
||
ideal selestaahs ale.
|
||
|
||
- SHRIMP, especially at paeyided with vtgeaaaaem at
|
||
blush bundles lat eavet, also small eaabs. sends
|
||
lamphapodsl, and mollnses
|
||
|
||
- MlNNows ur small lxzrbucding lash; again,
|
||
pmvtdlsl walh eevea and saeens as the laage lash glow,
|
||
of wath shallew walel Nfllgess
|
||
|
||
Eaamples lhe/ha/yeatl I'mlds leaulased
|
||
|
||
e Bluegill on lheatown lal saw/ha s 136A llg
|
||
|
||
. Bluegill wllh Gllllblbm lash 3,449; lg
|
||
lyaeld aneaease er ls llenesl
|
||
|
||
OR
|
||
|
||
- Bluogl“ and has. la polyeullaaae. at 3750 and m
|
||
lash/ha tespeenvelyl , zlz la kg
|
||
|
||
|
||
|