WorldCat Identities

White, Robert G. (Robert George) 1940-

Overview
Works: 13 works in 20 publications in 1 language and 146 library holdings
Genres: Conference papers and proceedings  Classification  Bibliography 
Roles: Author
Classifications: TK1425.S8, 333.956
Publication Timeline
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Most widely held works by Robert G White
Proceedings of the Symposium on Small Hydropower and Fisheries : May 1-3, 1985, Aurora, Colorado by Symposium on Small Hydropower and Fisheries( Book )

3 editions published in 1985 in English and held by 114 WorldCat member libraries worldwide

Endemic whitefishes of Bear Lake, Utah-Idaho : a problem in systematics by Robert G White( )

5 editions published between 1974 and 1985 in English and held by 7 WorldCat member libraries worldwide

The systematic status of whitefishes endemic to Bear lake, Utah-Idaho, has remained tenuous since their original description. Clarification of this problem was the major objective of the present study. The general approach was an integrated one, including examination of morphological, biochemical and ecological parameters; artificial hybrids were produced and compared with questionable groups from the natural population. Morphological analysis revealed five forms of Bear Lake whitefishes Prosopium gemmiferum (Bonneville cisco) and P. abyssicola (Bear lake whitefish) were well differentiated from other forms and were treated as originally described. The P. spilonotus (Bonneville whitefish) group, however, was found to be made up of two morphologically distinct populations, referred to as P. spilonotus (small form) and P. spilonotus (large form). The fifth group referred to as P. gemmiferum-like (represented by only five specimens) was intermediate between P. gemmiferum and either P. spilonotus (small form) or P. abyssicola and was hypothesized to be of hybrid origin. Multiple discriminant function analysis of the four major groups and P. williamsoni (mountain whitefish) (Logan River) confirmed morphological differentiation between forms. Hybridization studies among Bear Lake Prosopium and P. williamsoni involved 50 homo - and heterospecific crosses (17 combinations). Of 12 experimental hybrid combinations attempted, all those involving simultaneously ripe specimens of two groups (five crosses) showed maximum fertilization success equalling that of pure crosses. no evidence that interspecific crosses are less successful than conspecific crosses, with the possible exception of P. williamsoni ₉́⁰ x P. gemmiferum ₉́² (W x G), was obtained. Culture methods were developed and morphological comparisons made. Origin of P. gemmiferum-like hybrids in the lake population was not consistently explained by morphological comparison of known P. spilonotus (small form) ₉́⁰ x P. gemmiferum ₉́² (S x G) hybrids or P abyssicola ₉́⁰ x P. gemmiferum ₉́² (A x G) hybrids; morphometric characters were more like S x G hybrids while meristic characters were more closely associated with A x G hybrids. Based on evidence available, no definitive statement could be made concerning the origin of P. gemmiferum-like hybrids except that they are hybrids among combinations of P. gemmiferum and either P. spilonotus (small form) or P. abyssicola. no known hybrid explained the origin of either group of P. spilonotus. Electrophoretic analysis of general proteins and several enzyme systems of various tissues showed much similarity among Bear Lake Prosopium; only P. williamsoni was totally unique. Biochemical evidence did not support or refute separate consideration of the two forms of P. spilonotus but did establish that neither were phenotypic variants of P. williamsoni. Ecological characteristics of Bear Lake Prosopium revealed important distinctions between forms. Growth histories of P. abyssicola, P. spilonotus (small form) and P. spilonotus (large form) showed pronounced differences. Distinct differences in growth and in age and size at maturity of forms of P.. spilonotus provided further evidence supporting their separate consideration. Spatial overlap of spawning activities was marked between forms of P. spilonotus and P. gemmiferum; P. abyssicola was well separated spatially. Temporally, slight overlap was observed between ripe females of one group and ripe males of the succeeding group to spawn. the only observation of the simultaneous occurrence of ripe females of two forms was between P. spilonotus (large form) and P. spilonotus (small form); in this instance, the number of ripe females of each form was extremely small. No evidence of mass hybridization among forms was observed. A combination of temporal, spatial and ethological premating isolating mechanisms are thought to be important in reproductive isolation of Bear lake whitefishes while postmating mechanisms are nonfunctional with the possible exception of hybrid sterility. Morphological and ecological analyses, combined with results of experimental hybridization, provided abundant evidence supporting separate recognition of the two forms of P,. spilonotus. Karyotypes of P. gemmiferum, P abyssicola and P. spilonotus (small form) have been determined (Booke, 1974) and are unique for each species. If the karyotype of P. spilonotus (large form) is found to also be unique, there should be no question that the two forms of P. spilonotus represent distinct species. Final clarification of the taxanomic status of these forms will not come until karyotype data is available; however, based upon present evidence, tentative recognition of a new species is recommended
Evaluation of mitten crab exclusion technology during 1999 at the Tracy Fish Collection Facility, California by Robert G White( Book )

2 editions published in 2000 in English and held by 5 WorldCat member libraries worldwide

The Effects of supersaturation of dissolved gases on the fishery of the Bighorn River downstream of the Yellowtail Afterbay Dam : completion report( Book )

1 edition published in 1991 in English and held by 4 WorldCat member libraries worldwide

A study of fish and aquatic macroinvertebrate fauna in the South Fork Boise River below Anderson Ranch Dam with emphasis on effects of fluctuating flows by Robert G White( Book )

1 edition published in 1980 in English and held by 4 WorldCat member libraries worldwide

Evaluation of mitten crab exclusion technology during 2000 at the Tracy Fish Collection Facility, California( Book )

1 edition published in 2005 in English and held by 2 WorldCat member libraries worldwide

A survey of existing literature on Franklin D. Roosevelt Lake by David H Bennett( Book )

1 edition published in 1977 in English and held by 2 WorldCat member libraries worldwide

People, Science, Caribou Conference tapes by Carl M Hild( Recording )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

A study of fish and aquatic macroinvertebrate fauna in the South Fork Boise River below Anderson Ranch Dam by Daniel Thomas Wade( Book )

1 edition published in 1977 in English and held by 1 WorldCat member library worldwide

Environmental review of the Snake River (Jackson Lake to river mouth) and selected tributaries (Henrys Fork, Lower Boise River and upper Salmon River) by David H Bennett( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Instream flow requirements of Soda Butte Creek, Yellowstone National Park by Janet Decker-Hess( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

Environmental effects of hydroelectric operations on water quality, fish, aquatic macroinvertebrates, and other natural resources, an annotated bibliography by Denise Elaine Knight( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

 
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Alternative Names
White, Robert George 1940-

Languages
English (20)