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Book Distribution of Forage of Skipjack Tuna Euthynnus Pelamis in the Eastern Tropical Pacific

Download or read book Distribution of Forage of Skipjack Tuna Euthynnus Pelamis in the Eastern Tropical Pacific written by Maurice Blackburn and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fishery for skipjack tuna (Euthynnus pelamis) in the eastern Pacific Ocean might be extended if offshore areas of high skipjack abundance were known. One would expect the numbers of skipjack in these offshore areas to be related to the distribution of known skipjack forage organisms in the micronekton. The EASTROPAC oceanographic cruises yielded net-caught micronekton samples over large parts of the eastern tropical Pacific during seven successive 2-month periods. From these samples, the occurrence of organisms known to be prey of skipjack was expressed at ml/1000 m3. Charts of night and day concentrations in the upper 200 m were produced for each of the seven periods. In the region from long 92° to 119° W the major areas of maximum concentration of potential skipjack forage remained essentially constant during most periods. Two of these areas lie parallel to the equatorial upwelling zone--one just to the north, the other just to the south. Another zonal area of abundant forage generally occurs between lat 6° and 14° N. Forage is also frequently abundant between lat 14° and 20° N and long 107° and 119° W. The concentrations of skipjack forage in these areas are comparable with those in nearshore parts of the eastern tropical Pacific, where the present skipjack fishery occurs. The abundance of skipjack in the forage-rich offshore areas might therefore be sufficient to support commercial fishing operations. Sea-surface temperatures are generally suitable for skipjack in those areas. On three recent crossings of the equatorial region at about long 119° W, skipjack appeared to be abundant in the first three areas of high forage concentration mentioned above.

Book NOAA Technical Report NMFS SSRF

Download or read book NOAA Technical Report NMFS SSRF written by and published by . This book was released on 1971 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NOAA Technical Report NMFS CIRC

Download or read book NOAA Technical Report NMFS CIRC written by and published by . This book was released on 1973 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Tunas Oceanography and Meteorology of the Pacific

Download or read book Tunas Oceanography and Meteorology of the Pacific written by Paul N. Sund and published by . This book was released on 1981 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fishery Bulletin

Download or read book Fishery Bulletin written by and published by . This book was released on 1972 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Special Scientific Report

Download or read book Special Scientific Report written by and published by . This book was released on 1971 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A List of the Marine Mammals of the World

Download or read book A List of the Marine Mammals of the World written by Dale W. Rice and published by . This book was released on 1977 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NOAA Technical Report NMFS SSRF

Download or read book NOAA Technical Report NMFS SSRF written by United States. National Marine Fisheries Service and published by . This book was released on 1971 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wind Stress and Wind Stress Curl Over the California Current

Download or read book Wind Stress and Wind Stress Curl Over the California Current written by Craig S. Nelson and published by . This book was released on 1977 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book References for the Identification of Marine Invertebrates on the Southern Atlantic Coast of the United States

Download or read book References for the Identification of Marine Invertebrates on the Southern Atlantic Coast of the United States written by Richard E. Dowds and published by . This book was released on 1979 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Gulf of Maine Georges Bank Ichthyoplankton Collected on ICNAF Larval Herring Surveys September 1971 February 1975

Download or read book Gulf of Maine Georges Bank Ichthyoplankton Collected on ICNAF Larval Herring Surveys September 1971 February 1975 written by John B. Colton (Jr.) and published by . This book was released on 1977 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: The families, genera, and species of all larval fishes are tabulated and the abundance, length frequencies, and distribution of 12 species and 2 families are summarized utilizing data collected on 8 ichthyoplankton surveys of the Gulf of Maine-Georges Bank area. The segregation of coastal and oceanic species north and south of the coastal/slope water boundary during December is evidence in a comparison of the distribution of upper 100-m integrated temperature and Atlantic herring. Myctophidae, and Paralepididae larvae. All larval barracudinas and laternfishes occurred in areas where the integrated temperature was above 11° and 13°C, respectively. Ninety-one percent of positive larval herring tows were in areas where the integrated temperature was below 13°C.

Book Escape of King Crab Paralithodes Camtschatica from Derelict Pots

Download or read book Escape of King Crab Paralithodes Camtschatica from Derelict Pots written by William L. High and published by . This book was released on 1979 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: