Open Ocean Analysis Of A Sink Gillnet

Ware, Jonathan; Fuller, Allan; Stepenuck, Katie

i

Open Ocean Analysis Of A Sink Gillnet

Public Domain

1993
By Ware, Jonathan ; Fuller, Allan ; Stepenuck, Katie
Series: UNHMP-AR-SG 93-10

File Language:

Details

Personal Author:

Ware, Jonathan ; Fuller, Allan ; Stepenuck, Katie
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; Sea Grant
Sea Grant Program:

NHU (New Hampshire Sea Grant)
Description:

Current evidence indicates that the Harbor porpoise (Phoceana phoceana) population may be declining because of incidental take caused by sink-gillnet fishing in the Gulf of Maine. The acoustical signature of an open ocean sink-gillnet was compared to the hearing threshold of the harbor porpoise in this student project. Results suggest that the gillnet functions as an ambient noise modifier, increasing the intensity by 5-10 dB at low frequencies and decreasing the intensity at high frequencies. Since there were no obvious differences between the ambient and net noise trends, the harbor porpoise may be unable to distinguish the net from the regular ambient noise. More data are needed to determine the effects of a net holding fish.
Series:

UNHMP-AR-SG ; 93-10
Sea Grant Document Number:

NHU-T-93-003
Document Type:

Technical Report
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

urn:sha256:c7360907632ca44af56398ca031393b64fc544456e9c212d8ea77801ebcba05c
Download URL:

https://repository.library.noaa.gov/view/noaa/42145/noaa_42145_DS1.pdf
File Type:

[PDF - 3.17 MB ]

File Language:

ON THIS PAGE

Details

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.