Zooplankton CommunityMr. Don Ingles’ Pond

Zooplankton CommunityMr. Don Ingles’ Pond

Final Lab Report

Fish 415 Limnology

Jordan Nielson

KC Deife

Eric Johnson

Final Lab Report

Fish 415 Limnology

Jordan Nielson

KC Deife

Eric Johnson

OutlineOutline

• Introduction /Objectives

• Methods

• Results/Analysis

• Discussion

• Recommendations

• Introduction /Objectives

• Methods

• Results/Analysis

• Discussion

• Recommendations

IntroductionIntroduction

• Location

• Age of the Pond • Stocking History

• Problems with the pond – Mr. Ingles

• Location

• Age of the Pond • Stocking History

• Problems with the pond – Mr. Ingles

ObjectivesObjectives

• Determine the zooplankton types and abundance– Littoral and Pelagic Areas

• Determine the zooplankton types and abundance– Littoral and Pelagic Areas

Methods – Schindler trapMethods – Schindler trap

• Schindler Trap– At surface and every meter in three spots on

the north side of the pond

• Schindler Trap– At surface and every meter in three spots on

the north side of the pond

                 

 

Methods – Kick netMethods – Kick net

• Kick net at shoreline from the three sites– 3 meters from

shoreline– 3 – 1 meter sweeps

at each site– % visual analysis

of large macros

• Kick net at shoreline from the three sites– 3 meters from

shoreline– 3 – 1 meter sweeps

at each site– % visual analysis

of large macros

Methods – Beach seiningMethods – Beach seining

• Seine at each shore location for presence/absence of species

• Seine at each shore location for presence/absence of species

Methods – Analysis of Pelagic Zooplankton Counts

Methods – Analysis of Pelagic Zooplankton Counts

• MANOVA– Data examined for site, depth, and

zooplankton type effects on count

• Kruskal-Wallis and Jonckheere-Terpstra on depth in deep and mid sites

• 2-Way ANOVA – Data from entire pond– Site and Zooplankton weighted by count– Tukey classification on zooplankton

• MANOVA– Data examined for site, depth, and

zooplankton type effects on count

• Kruskal-Wallis and Jonckheere-Terpstra on depth in deep and mid sites

• 2-Way ANOVA – Data from entire pond– Site and Zooplankton weighted by count– Tukey classification on zooplankton

Results – Schindler trapResults – Schindler trap• MANOVA

– No site or depth effect

– Zooplankton type effect*

• KW and JT showed difference in depth at mid site*• 2-way ANOVA

– Copepods more abundant than all other types counted*

• Only Asplanchna were counted in the rotifer category– Too many small rotifers to count – the most abundant

zooplankton

• MANOVA– No site or depth effect

– Zooplankton type effect*

• KW and JT showed difference in depth at mid site*• 2-way ANOVA

– Copepods more abundant than all other types counted*

• Only Asplanchna were counted in the rotifer category– Too many small rotifers to count – the most abundant

zooplankton

*All significant differences have P<0.05

Average Zooplankton by Depth and Type at Mid-Site

Average Zooplankton by Depth and Type at Mid-Site

00101020203030404050506060707080809090100100

CladoceraCladocera CopepodaCopepoda ChaoborusChaoborus RotiferaRotifera

SurfaceSurface

1-Meter1-Meter

# pe

r li

ter

# pe

r li

ter

Results – Schindler trapResults – Schindler trap• MANOVA

– No site or depth effect

– Zooplankton type effect*

• KW and JT showed difference in depth at mid site*• 2-way ANOVA

– Copepods more abundant than all other types counted*

• Only Asplanchna were counted in the rotifer category– Too many small rotifers to count – the most abundant

zooplankton

• MANOVA– No site or depth effect

– Zooplankton type effect*

• KW and JT showed difference in depth at mid site*• 2-way ANOVA

– Copepods more abundant than all other types counted*

• Only Asplanchna were counted in the rotifer category– Too many small rotifers to count – the most abundant

zooplankton

*All significant differences have P<0.05

Average Zooplankton per Liter for Pelagic Area

Average Zooplankton per Liter for Pelagic Area

00

1010

2020

3030

4040

5050

6060

7070

8080

9090

Cladocera Copepoda Chaoborus RotiferaCladocera Copepoda Chaoborus Rotifera

# p

er l

iter

# p

er l

iter

AA

BB

AA

AA

Different letters indicate levels of significance P<0.05

Different letters indicate levels of significance P<0.05

Results – Kick NetResults – Kick Net• Several large macroinvertebrates found

at each site • Several large macroinvertebrates found

at each site

Odonata/Hemiptera

Diptera

Mollusca

75%

15%

10%

60%40%

10%

90%

ShallowShallow MidMid DeepDeep

Results – Beach SeiningResults – Beach Seining

• Beach Seining– Approximately 15 larval bluegill were

caught at each site

• Beach Seining– Approximately 15 larval bluegill were

caught at each site

DiscussionDiscussion• Lack of habitat/cover –

only a few rocks• Fish structure – only

small bluegill found• No lack of food for

larval fish• High number of rotifers

– Non – Asplanchna– Too many to count in all

of the samples

• Lack of habitat/cover – only a few rocks

• Fish structure – only small bluegill found

• No lack of food for larval fish

• High number of rotifers – Non – Asplanchna– Too many to count in all

of the samples

DiscussionDiscussion• Possible large fish eating all of the smaller fish

– stocking frequency of fish– IDFG Spring Valley Stocking Records

• Trout fishing might be bad because there is no cover and they are getting eaten by large fish

• Heating/ O2 in the pond – Summer months

• Possible large fish eating all of the smaller fish – stocking frequency of fish– IDFG Spring Valley Stocking Records

• Trout fishing might be bad because there is no cover and they are getting eaten by large fish

• Heating/ O2 in the pond – Summer months

RecommendationsRecommendations

• Add vegetation on a large portion of banks and in littoral area to provide cover for smaller fish that are stocked.

• Add vegetation on a large portion of banks and in littoral area to provide cover for smaller fish that are stocked.

RecommendationsRecommendations

• Man made structure throughout pond

• Horizontal at shore, Vertical in pond

• Man made structure throughout pond

• Horizontal at shore, Vertical in pond

RecommendationsRecommendations

• Don’t overstock fish – Cause disease/parasitism die offs

– Plot stock recruitment curves

• Trophic Cascading

• Don’t overstock fish – Cause disease/parasitism die offs

– Plot stock recruitment curves

• Trophic Cascading

RecommendationsRecommendations• Ray Scott’s video• "Complete Guide to

Creating GREAT SMALL WATERS"

• (1) "Build World Class Fishing Ponds & Lakes," (2) "How-To Stock & Manage Small Waters for Trophy Bass," and (3) "Rehabilitate Old or Unproductive Waters."

• Ray Scott’s video• "Complete Guide to

Creating GREAT SMALL WATERS"

• (1) "Build World Class Fishing Ponds & Lakes," (2) "How-To Stock & Manage Small Waters for Trophy Bass," and (3) "Rehabilitate Old or Unproductive Waters."

Questions?Questions?