Seasonal Distribution of Tunas and Billfishes in the Atlantic PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Seasonal Distribution of Tunas and Billfishes in the Atlantic PDF full book. Access full book title Seasonal Distribution of Tunas and Billfishes in the Atlantic by John P. Wise. Download full books in PDF and EPUB format.
Author: John P. Wise
Publisher:
ISBN:
Category : Albacore
Languages : en
Pages : 32
Get Book Here
Book Description
Charts of the Atlantic Ocean for each quarter of the year--January-March, etc.--show the distribution of 10 species and groups of species fished by the Japanese Atlantic longline fishery in the years 1956-68. These charts are based on detailed catch and fishing effort data published by the Japanese Government. Quarterly average catch per unit of effort was calculated for each 5° x 5° square, and contour lines were drawn through equal levels of catch per unit of effort. The text explains the calculation and contouring processes in detail, and has a section of remarks and explanation for each of the 10 species or groups.
Author: John P. Wise
Publisher:
ISBN:
Category : Albacore
Languages : en
Pages : 32
Get Book Here
Book Description
Charts of the Atlantic Ocean for each quarter of the year--January-March, etc.--show the distribution of 10 species and groups of species fished by the Japanese Atlantic longline fishery in the years 1956-68. These charts are based on detailed catch and fishing effort data published by the Japanese Government. Quarterly average catch per unit of effort was calculated for each 5° x 5° square, and contour lines were drawn through equal levels of catch per unit of effort. The text explains the calculation and contouring processes in detail, and has a section of remarks and explanation for each of the 10 species or groups.
Author: W. G. Smith
Publisher:
ISBN:
Category : Bothidae
Languages : en
Pages : 636
Get Book Here
Book Description
Larval flatfishes, representing 4 families, 17 genera, and 15 species, were identified from collections taken during a 1-yr survey designed to locate spawning grounds and trace dispersion of fish eggs and larvae on the continental shelf. Most flatfishes began spawning in the spring, a time of marked seasonal temperature change. The seasonal distribution of larvae indicated that: 1) bothids had longer spawning seasons than pleuronectids; 2) pleuronectids spawned largely in the northern half of the survey area during the spring; 3) most bothids spawned in the southern half, beginning in spring and continuing through early fall; 4) although cynoglossids spawned incidentally off North Carolina, most of their larvae were transported into the survey area from spawning grounds south of Cape Lookout; 5) the few representatives of the family Soleidae originated south of Cape Lookout; 6) spawning that began in the spring proceeded from south to north as the season progressed, but spawning that began in the fall proceeded from north to south, suggesting that the onset of spawning is triggered by spring warming and fall cooling; 7) most species spawned within a relatively narrow range of temperature; 8) salinity had no apparent influence on spawning.
Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 360
Get Book Here
Book Description
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category :
Languages : en
Pages : 360
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 726
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 176
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 242
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 952
Get Book Here
Book Description
Vols. for contain documents presented at the meeting of the Standing Committee on Research and Statistics.
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
Get Book Here
Book Description
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 438
Get Book Here
Book Description
