Author: James H. Selgeby
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 24

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Author: James H. Selgeby
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 14

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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The bathymetric distributions of fishes in Lake Superior has not been studied on a lakewide scale. Knowledge about the bathymetric distributions will aid in designing fish sampling programs, estimating absolute abundances, and modeling energy flow in the lake. Seasonal bathymetric distributions were determined, by 10m depth intervals, for 16 fishes collected with bottom trawls and bottom-set gill nets within the upper 150m of Lake Superior during 1958-75. Bathymetric distributions in spring gill nets were similar to those in trawls, with some exceptions. Lake herring and kiyi were rarely caught in trawls. In summer, pygmy whitefish, shortjaw cisco, lake herring, kiyi, longnose sucker, burbot, ninespine stickleback, trout-perch, slimy sculpin, and spoonhead sculpin were at shallower depths than in spring, whereas rainbow smelt were found in deeper water; there was no change for the other species. In fall, shortjaw cisco was at shallower depths than in summer, whereas the remaining species were found deeper, except for lake whitefish and lake trout whose modal depths did not change. Distributions of lake trout and lake whitefish were also analyzed by age group. The shallow-water species exhibited little seasonal changes in bathymetric distributions, whereas the species that inhabited the middepths and deeper water generally moved shallower as the seasons progressed. Most of the more pronounced seasonal changes in bathymetric distribution were associated with spawning movements.

Author:
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ISBN:
Category : Biology
Languages : en
Pages : 24

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Author: Richard A. Goyer
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ISBN:
Category : Baldcypress
Languages : en
Pages : 40

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Author:
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ISBN:
Category : Ecology
Languages : en
Pages : 578

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Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Author: Christopher James Harvey
Publisher:
ISBN:
Category : Food chains (Ecology)
Languages : en
Pages : 160

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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1076

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Author: Thomas N Todd
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ISBN:
Category : Coregonus
Languages : en
Pages : 716

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Author:
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ISBN:
Category : Fish communities
Languages : en
Pages : 130

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