7277

• UCREFRP Catalog Number: 7277
• Author: Papoulias, D.
• Title: Survival and Growth of Larval Razorback Sucker,
• USFW Year: 1988.
• Copyright Material: NO

0.5 m depth at the center of ponds. sa=?.- -a--e filters: using GA-4,
0.8 pM Mi.lliporeg filters, extracted in 9.= gone, and aralyzed
spectrcphotaxtrically (Hac? spe - , at 665 na.
Quantitative estimates of chlorophyll a w- = obtained (no
correction for turbidity and phaeophytin z died); moults were
used only as an index of relative .
Surface water temperatures, aquatic mates, and fish were
sampled weekly between 1000 and 1400 and =nd 2400 hr. As alrec-&
noted, ponds were separated into three ha:_- =nes: "s,.allows" fro=
water's edge to the level bottoms; %Ott=e m=ined by height of a
device develcPed to sample between 8 to 3:-- = above bottans; and
"open water" from surface to 30.5 cm above ---ates. Plankton tows
were by a sled mounted (Pennak 1978) or plankton net (80 u
mesh) towed at constant speed the length -- mr-- pond. The shallow
zone was sampled by touring the sled a stw=?--: stance near shore at
cMparable speed. Samples were preserved ` k buffered formalin.
Invertebrate samples were agitated are :.Zm: aliquots removed by
Hensen-Stempel pipette to a Sedgewick-Rafe =ELI. Field or strip
ccxmts were made (APHA 1981) and data were -rsed as mmbers/L.
Organisms were identified to various tauo:== categories, but
combined to major groups (e.g., families s ^?*- categories) for
analysis• lengths and widths of inverteh.= ire measured by ocular
micr meter at appropriate magnification or- _ =qamd microscope, and
assigned geometric shapes to reconstruct v-;,=m (Edmondson and
WinbeYg 1971). Widths of invertebrates we- ----ad for estimating size-