Dataset: Tioga Reeve logs

Name: Log sheets (pdf) of Reeve nets from the Tioga from R/V Tioga cruises in the Wilkinson Basin, Gulf of Maine from 2013-2014 (Gulf of Maine Pteropods project, GoME OA Pteropods project)
Published: 2013-12-02
Keywords: oceans

Cite This Dataset

Project:

Acidification of the Coastal Ocean: Are deep waters of the Gulf of Maine already corrosive to pteropods? (GoME OA Pteropods)

Seasonal and Ontogenetic Effects of Ocean Acidification on Pteropods in the Gulf of Maine (Gulf of Maine Pteropods)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Principal Investigator:

Amy Maas (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

final

Version Date:

2013-12-02

Validated:

Yes

Current State:

Final with updates expected

Log sheets (pdf) of Reeve nets from the Tioga from R/V Tioga cruises in the Wilkinson Basin, Gulf of Maine from 2013-2014 (Gulf of Maine Pteropods project, GoME OA Pteropods project)

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Description

Hand-written Reeve net logs of wire speed and angle, flow counts, cast comments, taxonomic notes, lists of specimens removed, and plots of temperature and salinity vs. depth when available (pdf)

The objective of Reeve net sampling was to gently collect live specimens to be sampled for physiological and genetic analyses. These trawls were short in duration and aimed to maximize pteropod catch.

Methods & Sampling

A 1-m diameter Reeve net with a 150-um mesh net was deployed via the A-frame. The book-clamp to attach the net was borrowed from the rigging shop. Ship speed during tows was ~1-1.5 knots. The downcast was done at ca. 5 m/min and the upcast at 5 m/min with a tow-yo pattern.

Data Processing Description

In the wet lab, the cod end was promptly divided among a number of buckets. These buckets were individually poured into a white plastic tray for sorting. Since pteropods tend to sink, the bottom buckets were examined first.

See cruise reports for preliminary results of the tows. (Click on Deployment links, below, then Deployment Report URL.)

Data Files

File
Reeve_logs.csv (Comma Separated Values (.csv), 906 bytes) MD5:f82a8b096dc44873eebbff0748a3e3fd Primary data file for dataset ID 472512

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1316040
WHOI	COI-2012: Wang,Lawson,Maas

Deployments

Deployment	Start Date	Platform	Investigator
TI668	2013-05-21	R/V Tioga	Zhaohui Aleck Wang (Chief Scientist) Gareth Lawson (Co-Chief Scientist) Amy Maas (Co-Chief Scientist) Amy Maas (Contact)	data info
TI700	2013-08-27	R/V Tioga	Zhaohui Aleck Wang (Chief Scientist) Amy Maas (Co-Chief Scientist) Amy Maas (Contact)	data info
TI715	2013-10-21	R/V Tioga	Amy Maas (Chief Scientist) Zhaohui Aleck Wang (Co-Principal Investigator) Amy Maas (Contact)	data info
TI725	2014-01-10	R/V Tioga	Amy Maas (Chief Scientist)	data info
TI729	2014-01-29	R/V Tioga	Amy Maas (Chief Scientist)	data info
TI746	2014-04-25	R/V Tioga	Amy Maas (Chief Scientist)	data info
TI777	2014-08-19	R/V Tioga	Amy Maas (Chief Scientist)	data info
TI787	2014-11-04	R/V Tioga	Amy Maas (Chief Scientist)	data info

Instruments

Reeve Net

Supplied Description:

A 1-m diameter Reeve net with a 150-um mesh net was deployed via the A-frame. A bookclamp was used attach the net to the wire.

Instrument Type

Generic Name: Reeve Net

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0147/

Generic Description:

A Reeve Net is a conventional ring net with a very large acrylic cylindrical cod-end (30 liters) designed to collect fragile gelatinous animals. The net is lowered to a particular depth and then hauled slowly back to the surface (5-10 m/min). Reeve (1981) also described a double net system with no bridle and flotation at the net mouth that is attached to a roller mechanism that rides on a tow wire.
The roller system is locked in place by a pressure release device. Once below a set pressure, the roller
and nets are released and they float slowly up the wire, gently collecting the zooplankton, without being
influenced by the motion of the vessel and associated vertical wire movements. (from Wiebe and Benfield, 2003)

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identification	unitless	cruise_id

Status message

Database

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Dataset: Tioga Reeve logs