The Tuna-Porpoise Problem: Dedicated Vessel Research Program. Summary of Research Results from the Second Leg of the Third Cruise of the Dedicated Vessel. 20 July to 18 August 1978. III2
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

The Tuna-Porpoise Problem: Dedicated Vessel Research Program. Summary of Research Results from the Second Leg of the Third Cruise of the Dedicated Vessel. 20 July to 18 August 1978. III2

Filetype[PDF-5.10 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
Details You May Also Like

Details:

  • Personal Author:
  • Corporate Authors:
    Southwest Fisheries Center (U.S.)
  • NOAA Program & Office:
    NMFS (National Marine Fisheries Service)
  • Description:
    The National Marine Fisheries Service, the Marine r-1amnial Commission, and the United States Tuna Foundation sponsored the tuna seiner M/V Queen Mary during 1978 as a 1 1dedicated vessel11 to study the tuna/ porpoise problem. Between 20 July and 18 August the focus of the research was two-fold: porpoise behavior and tuna olfactory attractants. Seventeen porpoise sets were made, more than 5600 were captured, 49 tons of tuna were captured and three porpoise were killed. The behavioral investigators, using the focal animal sampling method, made most of their observations while swimming among the porpoise. With the focal animal sampling method, single animals were observed for 5 minutes, and all of their overt behavior was recorded on slates. A total of 135 5-minute case observations was made. A 1 1 dictionary" of behavioral events occurring in the purse seine was developed so the patterns can be recognized by others. The composition and sizes of various porpoise subgroups were identified. A number of behavioral responses thought to be learned were observed and noted. A composite behavioral sequence for a typical set on this cruise is described. The tuna olfactory attractant was tested on 10 sets. A response from the tuna was observed on only two sets. On one set, a few individuals reacted briefly, however, no response was seen from the whole school. On the other set, 2 tons of tuna responded to the attractant for short periods of time; however, the school did not stay near the attractant for long periods.
  • Keywords:
  • Series:
    Administrative Report ; No. LJ-79-13
  • Document Type:
    Administrative Report
  • Rights Information:
    Public Domain
  • Compliance:
    Library
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files

More +

You May Also Like

Checkout today's featured content at repository.library.noaa.gov

Version 3.26