Dataset: Tioga Reeve logs
Deployment: TI725

Log sheets (pdf) of Reeve nets from the Tioga

Principal Investigator:

Amy Maas (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

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)

Current State:

Final no updates expected

Version:

2014-02-13

Version Date:

2014-02-13

Data URL:

https://www.bco-dmo.org/dataset-deployment/516451/data

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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

Dataset acquisition description

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

Dataset 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.)

More information about this dataset deployment

Funding

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

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

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

Database

Contribute Data

Dataset: Tioga Reeve logs
Deployment: TI725

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Tioga Reeve logsDeployment: TI725

Dataset acquisition description

Dataset Processing Description

Dataset: Tioga Reeve logs
Deployment: TI725