MARINE-DERIVED NUTRIENTS, COMMERCIAL FISHERIES, AND PRODUCTION OF SALMON AND LAKE ALGAE IN ALASKA

Ecology ◽  
2005 ◽  
Vol 86 (12) ◽  
pp. 3225-3231 ◽  
Author(s):  
Daniel E. Schindler ◽  
Peter R. Leavitt ◽  
Curtis S. Brock ◽  
Susan P. Johnson ◽  
Paul D. Quay
Keyword(s):  
Commercial Fisheries ◽  
Marine Derived Nutrients

Predicting changes in distribution of a large coastal shark in the face of the strengthening East Australian Current

2020 ◽  
Vol 642 ◽  
pp. 163-177 ◽  
Author(s):  
Y Niella ◽  
AF Smoothey ◽  
V Peddemors ◽  
R Harcourt
Keyword(s):  
Austral Summer ◽  
Conservation Strategies ◽  
Limiting Factor ◽  
Commercial Fisheries ◽  
East Australian Current ◽  
Spatial And Temporal Patterns ◽  
Marine Animals ◽  
Factors Affecting ◽  
Southeastern Australia ◽  
The Face

In the face of accelerating climate change, conservation strategies will need to consider how marine animals deal with forecast environmental change as well as ongoing threats. We used 10 yr (2009-2018) of data from commercial fisheries and a bather protection program along the coast of New South Wales (NSW), southeastern Australia, to investigate (1) spatial and temporal patterns of occurrence in bull sharks and (2) environmental factors affecting bull shark occurrence along the coast of NSW. Predicted future distribution for this species was modelled for the forecast strengthening East Australian Current. Bull sharks were mostly harvested in small to larger estuaries, with average depth and rainfall responsible for contrasting patterns for each of the fisheries. There was an increase in the occurrence of bull sharks over the last decade, particularly among coastal setline fisheries, associated with seasonal availability of thermal gradients >22°C and both westward and southward coastal currents stronger than 0.15 and 0.60 m s-1, respectively, during the austral summer. Our model predicts a 3 mo increase in the availability of favourable water temperatures along the entire coast of NSW for bull sharks by 2030. This coastline provides a uniquely favourable topography for range expansion in the face of a southerly shift of warmer waters, and habitat is unlikely to be a limiting factor for bull sharks in the future. Such a southerly shift in distribution has implications for the management of bull sharks both in commercial fisheries and for mitigation of shark-human interactions.

Status of Commercial Fisheries in the Kingdom of Bahrain

2013 ◽  
Vol 26 (1 (special Issue)) ◽  
pp. 220-238 ◽  
Author(s):  
Thamer S. Ali ◽  
Asma A. Abahussain
Keyword(s):  
Commercial Fisheries

Who's onboard? A predictive analysis of cooperative formation in commercial fisheries

2021 ◽  
Vol 279 ◽  
pp. 111715
Author(s):  
Michael De Alessi ◽  
Michael C. Melnychuk ◽  
Edward Wort ◽  
Ray Hilborn
Keyword(s):  
Predictive Analysis ◽  
Commercial Fisheries

Book Reviews

2014 ◽  
Vol 52 (2) ◽  
pp. 565-567
Keyword(s):  
Oil And Gas ◽  
Arctic Region ◽  
Economic Benefits ◽  
Infrastructure Investment ◽  
Commercial Fisheries ◽  
International Studies ◽  
Oil And Gas Development ◽  
Resource Exploration ◽  
Benefits And Costs

Michael A. Goldstein, Professor of Finance, Babson College reviews “Arctic Economics in the 21st Century: The Benefits and Costs of Cold” by Heather A. Conley. The Econlit abstract of this book begins: “Explores the economic benefits of an increasingly open Arctic region and the costs of exploring the riches of the American Arctic. Discusses Arctic frontiers; U.S. Arctic oil and gas development; Arctic mineral resource exploration; Arctic destination and trans-shipping; Arctic commercial fisheries; Arctic ecotourism; and Arctic infrastructure investment. Conley is Director and Senior Fellow of the Europe Program at the Center for Strategic and International Studies.”

Fish Attraction with Pulsed Low-Frequency Sound

1968 ◽  
Vol 25 (7) ◽  
pp. 1441-1452 ◽  
Author(s):  
Joseph D. Richard
Keyword(s):  
Acoustic Stimulus ◽  
Low Frequency ◽  
Reef Fishes ◽  
Test Site ◽  
Acoustic Signals ◽  
Commercial Fisheries ◽  
Test Results ◽  
Potential Applications ◽  
Predatory Fishes ◽  
Underwater Television

A series of tests were conducted to determine the effectiveness of pulsed low-frequency acoustic signals for attracting fishes. The acoustic signals were contrived to simulate the hydrodynamically generated disturbances normally associated with active predation. Underwater television was used to observe fish arrivals during both control and test periods. Demersal predatory fishes were successfully attracted although they habituated rapidly to the acoustic stimulus. Members of the families Serranidae, Lutjanidae, and Pomadasyidae were particularly well represented among the fishes attracted. Sharks were also attracted in considerable numbers. Herbivorous reef fishes, although common around the test site, were not attracted. Possible relationships between the test results and the hearing capabilities of fishes are discussed. It is concluded that acoustic attraction techniques have potential applications in certain existing commercial fisheries.

Nitrogen transfer from sea to land via commercial fisheries

2008 ◽  
Vol 1 (2) ◽  
pp. 111-112 ◽  
Author(s):  
R. Maranger ◽  
N. Caraco ◽  
J. Duhamel ◽  
M. Amyot
Keyword(s):  
Nitrogen Transfer ◽  
Commercial Fisheries

Supplementary Checks on the Scales of Pink Salmon (Oncorhynchus gorbuscha) and Chum Salmon (O. keta)

1965 ◽  
Vol 22 (6) ◽  
pp. 1477-1489 ◽  
Author(s):  
H. T. Bilton ◽  
W. E. Ricker
Keyword(s):  
British Columbia ◽  
Chum Salmon ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Commercial Fisheries ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Clear Cut ◽  
Second Year Of Life ◽  
Second Year ◽  
Similar Incidence

Among 159 central British Columbia pink salmon that had been marked by removal of two fins as fry and had been recovered in commercial fisheries after one winter in the sea, the scales of about one-third showed a supplementary or "false" check near the centre of the scale, in addition to the single clear-cut annulus. This evidence from fish of known age confirms the prevailing opinion that such extra checks do not represent annuli, hence that the fish bearing them are in their second year of life rather than their third. Unmarked pink salmon from the same area, and some from southern British Columbia, had a generally similar incidence of supplementary checks. In both marked and unmarked fish the supplementary checks varied in distinctness from faint to quite clear. In a sample of scales of 14 double-fin marked chum salmon which were known to be in their 4th year, all fish had the expected 3 annuli, and 12 fish had a supplementary check inside the first annulus.

Fisheries Development and Management in Indonesia

1973 ◽  
Vol 30 (12) ◽  
pp. 2335-2340
Author(s):  
N. Zachman
Keyword(s):  
Large Scale ◽  
Training System ◽  
Fish Distribution ◽  
Cold Chain ◽  
Artisanal Fisheries ◽  
Commercial Fisheries ◽  
Fresh Fish ◽  
System Establishment ◽  
Fishery Products ◽  
Quality Of Products

Before 1968, fishery development in Indonesia concentrated on the artisanal fisheries. No significant progress was made until the emphasis changed to the commercial fisheries, as part of the first 5-year development plan of 1969–74. The new approach was on economics and marketing instead of on production. A long-term plan over 25 years has been prepared, divided into 5-year operational plans.Indonesia has important fishery resources, especially pelagic stocks. Large extents of continental shelves also provide the possibility of increased trawl fishing, especially for shrimp. Conditions are also favorable for aquaculture. The position of the country between two oceans and two continents locates it favorably to exploit the tunas of both the Indian Ocean and the Pacific Ocean, and to maintain a flow of fishery products to international markets. Manpower is abundant and relatively cheap.The program to develop artisanal fisheries concentrates on increasing the income per capita of fishermen through developing fish marketing and production. Commercial fisheries are concentrating on production of export products, especially shrimp, skipjack, and tuna, to earn foreign exchange. Effective and efficient administration is being formed to carry out fisheries development, involving the reorganization of the Central and Regional Fisheries agencies. Staff are being upgraded, training and education are being reviewed, and research is being intensified.New laws have resulted in the establishment of eight domestic companies with a total investment of $27 million (US). Exports of fishery products have significantly increased, especially shrimp. Marketing is improved through the establishment of a cold chain, which is expected to lead to improved quality of products and increased earnings for fishermen.The goals of the first 5-year plan include: establishment of large-scale fishing industries, to export products valued at $30–40 million (US) per year; establishment of marketing facilities for fresh fish distribution in the most populated areas; raising artisanal fisheries to a level where they can independently sustain growth; establishment of an effective research system; establishment of an effective education and training system; establishment of fisheries cooperatives; improvement of the administration of fisheries.

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