Dataset: CTD Boothbay to Hague

Name: CTD data from F/V Tenacious, Gulf of Maine, 2001-2003, associated with lobster larvae study from F/V Shearwater NEC-LI2001-1 in the between Cape Small and Lubec Maine from July to August 2001 (NEC-CoopRes project)
Published: 2006-02-01
Keywords: oceans

Cite This Dataset

Spatial Extent: N:44.658 E:-67.0993 S:43.2667 W:-69.9145

Project:

Northeast Consortium: Cooperative Research (NEC-CoopRes)

Program:

NorthEast Consortium (NEC)

Principal Investigator:

Dr Lewis Incze (University of Southern Maine, USM)

Captain:

Mathew Thomson

Proctor Wells

Data Manager:

Mr Nicholas Wolff

Version:

final

Version Date:

2006-02-01

Validated:

Yes

Current State:

Final no updates expected

CTD data from F/V Tenacious, Gulf of Maine, 2001-2003, associated with lobster larvae study from F/V Shearwater NEC-LI2001-1 in the between Cape Small and Lubec Maine from July to August 2001 (NEC-CoopRes project)

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Description

"Inshore/Offshore Patterns of Lobster (Homarus americanus) Larvae and Postlarvae in the Northern Gulf of Maine, with Implications for Spatial Relationships Between Egg Production and Settlement"

Project Leader: Lewis Incze, University of South Maine - Bioscience Research Institute
Additional Participants:
Proctor Wells, F/V Tenacious
Mathew Thomson, Cape Cod Commerical Hook Fisherman's Association
Eric Annis, Rugters University
Nicholas Wolff, University of South Maine - Bioscience Research Institute

This hydrography is from a sampling of the entire coastal current system (Boothbay to the Hague Line) during a two-week cruise in early to middle August 2001. Data is being analyzed using computer models of the flow field (collaborations with Drs. Huijie Xue, University of Maine and Christopher Naimie, Dartmouth College) and will be combined with a number of other, ongoing studies of postlarval abundance and settlement. Our long-term goal is to derive a mechanistic model of spatial and temporal lobster recruitment dynamics, an effort that ultimately will be coordinated with Canadian and other U.S. colleagues.

Note:
This hydrographic data complements the larval lobster data also located on this site.

Questions should to directed to:
Nicholas Wolff
University of Southern Maine
Bioscience Research Institute
Portland, ME 04101

phone: 207 228-809
e-mail: nwolff@maine.edu

last updated February 1, 2006; gfh

Methods & Sampling

Our research has shown that the settled abundance of Young-of-Year lobsters is determined to a significant degree by the abundance and delivery of postlarvae to appropriate settlement habitats (Incze et al. 1997, 2000b). Settlement densities and the productivity of the lobster fishery in Maine are distinctly different east and west of Penobscot Bay (Steneck and Wilson 2000; R. Wahle et al., unpubl. Data, in prep.). We want to understand the mechanisms behind these differences, the connections between lobster populations in the northern and central coastal Gulf (that is, transboundary connections in the stock), and the factors that might cause patterns of recruitment to vary (that is, interannual and decadal patterns of change). The data collected with NEC support and other grants is documenting the postlarval supply patterns between the east and west, and those data are being used in a current synthesis effort that includes egg production, circulation modeling, settlement, growth and fisheries production (under a grant from NOAA's Coastal Ocean Program to L. Incze and ten Co-PIs, 2003-2004). The goal is to understand the spatial and physical relationships between egg production and the patterns (spatial and temporal) of recruitment and production in the lobster population. The current synthesis effort is being carried out by U.S. and Canadian scientists (contact L. Incze for further. A paper on postlarval distributions is in prep by Eric Annis (who just completed his Ph.D. at the Uiversity of Maine), L. Incze and others

Data Processing Description

Data Files

File
ctd_LI.csv (Comma Separated Values (.csv), 775.79 KB) MD5:4645d3c7c421c78355edd37120f69a75 Primary data file for dataset ID 2784

More Information about this dataset

Funding Sources

None available yet

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
NEC-LI2001-1		2001-07-30	F/V Shearwater	Dr Lewis Incze (Chief Scientist) Proctor Wells (Co-Chief Scientist)	data info

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
year	year, four digit year i.e. 2001		year
transect	transect number		no_bcodmo_term
station	station number		station
cast	CTD cast number		cast
month_local	month of year, local time, (1-12)		month_local
day_local	day of month, local time, (1-31)		day_local
yrday_local	year day, local time, (year day 1.5 = Jan 1 at 1200 hrs)	YYY.Y	yrday_local
lat	latitude, negative = South	decimal degrees	lat
lon	longitude, negative = West	decimal degrees	lon
temp_sst	sea surface temperature, vessel intake	degrees C	no_bcodmo_term
depth	depth of observation	meters	depth
sal	salinity, ppt		sal
temp	temperature	decimal degrees C	temp
sigma_t	sigma_t, density	kg/m<sup3</sup>-1000	sigma_t

Database

Contribute Data

Dataset: CTD Boothbay to Hague

"Inshore/Offshore Patterns of Lobster (Homarus americanus) Larvae and Postlarvae in the Northern Gulf of Maine, with Implications for Spatial Relationships Between Egg Production and Settlement"