Growth Rates of Neocalanus Species in the Northern Gulf of Alaska Russell R. Hopcroft Alexei Pinchuk Cheryl Clarke.

Slides:

Advertisements

Similar presentations

Topic 5: Ecology & Evolution Miss Friedman

Advertisements

Population Growth and Regulation

Chapter 6: Economic Growth Estimate economic growth and implications of sustained growth for standard of living. Trends in economic growth in U.S. and.

Population Ecology. Population Demographics Demographics are the various characteristics of a population including, Population Size, Age Structure, Density,

Growth rates of Neocalnaus flemingerii in the northern Gulf of Alaska in 2001 and 2002 H. Liu,C. Clarke & R.R.Hopcroft Institute of Marine Science, University.

Artemia culture in Southeast Asia: Special emphasis to Vietnam By: Nguyen Thi Hong Van and Nguyen Van Hoa Aquaculture and Fisheries Sciences Institute.

9 Population Growth and Regulation. 9 Population Growth and Regulation Case Study: Human Population Growth Life Tables Age Structure Exponential Growth.

Testing the r' method of estimating per capita growth rate in Aedes albopictus Matthew Chmielewski, Camilo Khatchikian and Todd Livdahl Department of Biology,

Measures of Central Tendency MARE 250 Dr. Jason Turner.

Timed. Transects Statistics indicate that overall species Richness varies only as a function of method and that there is no difference between sites.

Reproductive Potential. Warm up What is a population? All the individuals of a species that are living in an area at one time.

Chapter 9: Leslie Matrix Models & Eigenvalues

POPULATION DENSITY, DISTRIBUTION & GROWTH.  Density is a measure of how closely packed organisms are in a population  Calculated by … DENSITY # of individuals.

A Multiple Linear Regression of pCO2 against Sea Surface Temperature, Salinity, and Chlorophyll a at Station BATS and its Potential for Estimate pCO2 from.

11 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. BIOL 3240 Plant and Animal Ecology – Population Dynamics.

Population Growth and Regulation

Organisms at different life stages can have vastly different reproduction and mortality rates: Juveniles: often high mortality risk and no reproduction.

Somatic Growth of Juvenile Strongylocentrotus droebachiensis Fed Artificial Feeds of Varying Nutritional Composition INTRODUCTION Background Three decades.

What is a population? Within a given area where the scale of the area is study-dependent Localised group of individuals of the same species e.g. population.

Introduction Oithona similis is the most abundant copepod in the Gulf of Alaska, and is a dominant in many ecosystems from the poles to the sub-tropics.

Chapter 5 Population Ecology. Counting individuals What constitutes an individual organism?

Development of the Lipid Accumulation Window hypothesis to explain Calanus finmarchicus dormancy Jeffrey Runge School of Marine Sciences, University of.

Development, growth, and egg production of Neocalanus flemingeri in the eastern subaractic pacific: a synthesis of laboratory and field approcaches Hui.

Stage Based Population Projection Matrices and the Power of Linear Algebra Michael Bruce and Emily Shernock.

An adjoint data assimilation approach Physical and Biological Controls on Calanus finmarchicus in the Georges Bank Region GlOBEC broad-scale surveysAcadia.

Lecture 6 Forestry 3218 Forest Mensuration II Lecture 6 Double Sampling Cluster Sampling Sampling for Discrete Variables Avery and Burkhart, Chapter 3.

CHAPTER 3: COMMUNITIES + BIOMES 3-1: COMMUNITIES P

Population Growth – Chapter 11

Vertical distribution of ontogenetically migrating copepods in the Western Subarctic Gyre T. Kobari 1, D. K. Steinberg 2, S. Wilson 2, K. Buesseler 3,

Growth rates of Neocalanus species in the Gulf of Alaska R. R. Hopcroft, A.I. Pinchuk, & C. Clarke Institute of Marine Science, University of Alaska Fairbanks.

Summary Euphausiids (krill) are important food items of fish, seabirds and whales: consequently, it is important to understand their seasonal cycles. The.

55.2 How Do Ecologists Study Population Dynamics? To understand population growth, ecologists must measure population processes as well as population traits.

OS36B-03 Growth and development of Metridia pacifica (Copepoda: Calanoida) in the northern Gulf of Alaska Hui Liu & Russell R. Hopcroft

Preliminary Data on Euphausiid Distribution and Growth in the Northern Gulf of Alaska. A.I. Pinchuk, R.R. Hopcroft, K.O. Coyle Institute of Marine Science,

1 Population Dynamics Chapter Outline Estimating Patterns of Survival Survivorship Curves Age Distribution Rates of Population Change  Overlapping.

Population Growth Models and Methods. Mr. and Mrs. Rabbit … +

Seasonal variations in mean water column temperatures in the northern GOA (obtained from IMS GLOBEC website ). The temperature.

USING INDICATORS OF STOCK STATUS WHEN TRADITIONAL REFERENCE POINTS ARE NOT AVAILABLE: EVALUATION AND APPLICATION TO SKIPJACK TUNA IN THE EASTERN PACIFIC.

1 Population Ecology. 2 Environmental Variation Key elements of an organism’s environment include: – temperature – water – sunlight – Soil – Classical.

Jo King: Mechanisms relating the ocean-scale distribution of Calanus finmarchicus to environmental heterogeneity Douglas Speirs Acknowledgments: Bill Gurney.

Outline Intro to Population Ecology Estimating Patterns of Survival Survivorship Curves Age Distribution Rates of Population Change –Overlapping Generations.

Biodiversity of Fishes: Life-History Allometries and Invariants Rainer Froese

"The Gulf of Alaska Seward Line & 2006 Russell R. Hopcroft, Kenneth O. Coyle, Tomas J. Weigngartner, Terry E. Whitledge Institute.

1 Module One: Measurements and Uncertainties No measurement can perfectly determine the value of the quantity being measured. The uncertainty of a measurement.

Readings Table 10.1, p. 246 Table 10.2, p. 248

Egg production rates of the larger copepods in the Gulf of Alaska: Calanus marshallae, Calanus pacificus, Eucalanus bungii and Neocalanus flemingeri Russell.

Ocean-scale modelling of Calanus finmarchicus

Introduction Egg production in copepod species may be the largest component of copepod production and is a parameter routinely monitored in ecosystem studies.

Growth rates of Neocalanus flemingeri in the northern Gulf of Alaska in 2001 and 2002 H. Liu,C. Clarke & R.R.Hopcroft Institute of Marine Science, University.

Properties of populations Growth patterns Mortality patterns Age structure Density dispersion A population is a group of organisms of the same species.

SpeciesBackwards stepwise regression Multiple linear regressionn Molt Increment βTβT β Chl β CL r2r2 P(T, Chl, CL) T. inermis T. spinifera E. pacifica.

AB Egg release of T. inermis and E. pacifica in the northern GOA. Most of T. inermis females started to release eggs within first 2 days of incubation.

Acknowledgments Awesome research technicians: Carla Maria Delfino and Kayt Chambers Funding: This research is supported by the U.S. GLOBEC Northeast Pacific.

A comparison of copepod egg production rates in the Gulf of Alaska Russell R. Hopcroft.

Egg production rates of Pseudocalanus mimus and Pseudocalanus newmani in the Gulf of Alaska R.R. Hopcroft, C. Clarke, & A.I. Pinchuk Institute of Marine.

Growth Rates of Euphausiids in the Northern Gulf of Alaska in A.I. Pinchuk *, R.R. Hopcroft, K.O. Coyle Institute of Marine Science, University.

Presented by: Khiem Phan. OUTLINE I. Introduction II. Materials and Methods III. Results IV. Conclusions

Tracking life history of each particle Particles could be divided into three groups (Fig. 7) The red group’s period of copepodite stage shortened when.

1 Population Ecology. 2 Environmental Variation Key elements of an organism’s environment include: Key elements of an organism’s environment include:

Mallard (Anas platyrhynchos L

Dynamics of Ecosystems: Population Ecology

STEM Fair: Statistical Analysis

Russell R. Hopcroft & Kenneth O. Coyle

Flies and a Rolled Up Carpet: the Sylvia Hunt Murder Case

Russell R. Hopcroft Cheryl Clarke Alexei Pinchuk Amanda Byrd

Climate change research in the Gulf of Alaska

Ken Coyle, Russ Hopcroft & Alexei Pinchuk

Institute of Marine Science, University of Alaska Fairbanks

Relationship Between NO3 and Salinity:

Flies and a Rolled Up Carpet: the Sylvia Hunt Murder Case

Presentation transcript:

Growth Rates of Neocalanus Species in the Northern Gulf of Alaska Russell R. Hopcroft Alexei Pinchuk Cheryl Clarke

Neocalanuscristatus Neocalanus plumchrus plumchrus (& flemingeri) 3 species:

Typical Life cycle

Information Gap Although we know overall life cycle, we lack precise or direct measurements of: development times growth rate Reproductive output

Approach 1.Determine direct rates from freshly collected animals at in situ temperatures throughout the annual cycle Single stage incubationsSingle stage incubations Artificial cohortsArtificial cohorts 2.Determine maximal food satiated rates in the lab at multiple temperatures 3.Determine reproductive output 4.Compare these measured rates to those inferred from field observations

Gulf of Alaska GLOBEC

Artificial Cohorts (4-5 days) Multi-stage/size distribution is cut into distinct stages/sizesMulti-stage/size distribution is cut into distinct stages/sizes Incubated Neocalanus in LIncubated Neocalanus in L Change in stage and size noted Development time and growth rate calculated

Single stage incubation (4-5 days)

Stage durations

Growth Rate

Generation time Average faster than previous estimates [i.e days estimated (Miller, 1993), days for C3 & C4 determined (Miller and Nielsen, 1988)] First 4 copepodite stages would be completed in days … populations poorly synchronized Assuming N. femingeri/plumchrus naupliar development of days (Saito & Tsuda, 2000); it would appear that days from hatching are required to reach C5. The duration of the longer-lived stage C5 in the upper water column (prior to diapause) remains to be established

Influence of environment Temperature relatively constant during all three cruises (4.5-6°C)Temperature relatively constant during all three cruises (4.5-6°C) Chlorophyll and degree of stratification increased on subsequent cruisesChlorophyll and degree of stratification increased on subsequent cruises Current task: to explore the relationship between measured rates and these variables….Current task: to explore the relationship between measured rates and these variables….

…move on to egg production