My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
7895
CWCB
>
UCREFRP
>
Public
>
7895
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:31 PM
Creation date
5/20/2009 11:01:46 AM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
7895
Author
Langhorst, D. R. and P. C. Marsh.
Title
Early Life History Of Razorback Sucker In Lake Mohave.
USFW Year
1986.
USFW - Doc Type
Order Number 5-PG-30-06440,
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
36
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
13 <br />larval foods generally reflected the most numerous animals in the <br />plankton, they also appear to forage among beds of vegetation. <br />Smaller larvae (<12 mm) from the Arizona Bay backwater ate foods <br />similar to those of larvae from the lake (Table 3), but most stomachs <br />were again empty. Larger larvae (>12 mm) had significantly fewer empty <br />stomachs. Although their diet was considerably more diverse than that <br />of smaller individuals, either there or in -the lake, primary foods were <br />the same (Table 3). <br />Sizes of food taken by larval razorback were highly variable, both <br />in the lake and in the backwater. Smallest items were rotifers and <br />largest zooplankters were Daphnia (Table 4). Chironomidae larvae in <br />stomachs of the largest sucker larvae from the backwater were the <br />largest items overall. Among predominant foods, sucker larvae took <br />individual items which were significantly smaller than in the plankton <br />population at large (t-test for comparison of means, p = 0.95). This is <br />especially notable for Daphnia which averaged 0.66 to 0.86 mm in length <br />in sucker stomachs, about half the average size (1.42 to 1.60 mm) in <br />plankton samples (Tables 2, 4). <br />Benthic invertebrates (chironomids, ostracods, trichopterans), <br />because of their generally large sizes, may contribute more to larval <br />nutrition than indicated by data on occurrence and numbers (Table 3). <br />Use of these foods, plus Macrothrix, indicates that larval suckers <br />utilize varied food resources and forage among essentially all available <br />habitats (limnetic, benthic, and macrophytic).
The URL can be used to link to this page
Your browser does not support the video tag.