Erratum to: Effects of Dietary Selenomethionine on Cutthroat Trout (Oncorhynchus clarki bouvieri) Growth and Reproductive Performance Over a Life Cycle

Life-history organization of the cutthroat trout (Oncorhynchus clarki) may be viewed at various levels, including species, subspecies, metapopulation, population, or individual. Each level varies in spatial scale and temporal persistence, and components at each level continually change with changes in environment. Cutthroat trout are widely distributed throughout the western United States, occurring in such diverse environments as coastal rivers of the Pacific Northwest and interior streams of the Great Basin. During its evolution the species has organized into 14 subspecies with many different life-history characteristics and habitat requirements. Within subspecies, organization is equally complex. For example, life-history traits, such as average size and age, migration strategy, and migration timing, vary among individual spawning populations of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in tributary streams of Yellowstone Lake. Understanding the effects of human perturbations on life-history organization is critical for management of the cutthroat trout and other polytypic salmonid species. Loss of diversity at any hierarchical level jeopardizes the long-term ability of the species to adapt to changing environments, and it may also lead to increased fluctuations in abundance and yield and increase the risk of extinction.

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Range-wide status of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri): 2001.

10.5962/bhl.title.45714 ◽

2003 ◽

Author(s):

Bruce E. May ◽

Bradley B. Shepard ◽

Wendi. Urie ◽

◽

...

Keyword(s):

Cutthroat Trout ◽

Oncorhynchus Clarki ◽

Oncorhynchus Clarki Bouvieri ◽

Yellowstone Cutthroat Trout

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Genetic Investigation of Snake River and Yellowstone Cutthroat Trout

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.2003.3547 ◽

2003 ◽

Vol 27 ◽

pp. 81-86

Author(s):

Jeffery Mitton

Keyword(s):

Mitochondrial Dna ◽

Natural Populations ◽

Cutthroat Trout ◽

Snake River ◽

Oncorhynchus Clarki ◽

Genetic Investigation ◽

Fish Hatchery ◽

Oncorhynchus Clarki Bouvieri ◽

Yellowstone Cutthroat Trout ◽

The Relationship

The relationship between Yellowstone cutthroat trout, Oncorhynchus clarki bouvieri, and Snake River finespotted cutthroat trout, 0. clarki behnkei, was examined with two mitochondrial DNA fragments, COl and ND5. No variation was found within either subspecies, and just one (out of 1069) nucleotide differed between subspecies. Thus, these subspecies are very closely related. Samples for this study were obtained from hatcheries, and may not be representative of the subspecies. 0. c. bouveri were sampled from the Clark Fork Hatchery, in Powell, WY, and 0. c. behnkei were sampled from the National Fish Hatchery in Jackson, WY. Further sampling, preferably from natural populations, is needed to more thoroughly survey the variation within subspecies, and to measure the differences between subspecies.

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Estimates of Predator Consumption of Yellowstone Cutthroat Trout (Oncorhynchus clarki bouvieri) in Yellowstone Lake

Journal of Freshwater Ecology ◽

10.1080/02705060.2002.9663900 ◽

2002 ◽

Vol 17 (2) ◽

pp. 319-329 ◽

Cited By ~ 18

Author(s):

Paul Stapp ◽

Gregory D. Hayward

Keyword(s):

Cutthroat Trout ◽

Oncorhynchus Clarki ◽

Yellowstone Lake ◽

Oncorhynchus Clarki Bouvieri ◽

Yellowstone Cutthroat Trout

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Epoxidation of juvenile hormone was a key innovation improving insect reproductive fitness

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.2109381118 ◽

2021 ◽

Vol 118 (45) ◽

pp. e2109381118

Author(s):

Marcela Nouzova ◽

Marten J. Edwards ◽

Veronika Michalkova ◽

Cesar E. Ramirez ◽

Marnie Ruiz ◽

...

Keyword(s):

Life Cycle ◽

Juvenile Hormone ◽

Reproductive Performance ◽

Reproductive Fitness ◽

Fitness Cost ◽

Evolutionary Significance ◽

Methyl Farnesoate ◽

Entire Life ◽

Entire Life Cycle ◽

Key Innovation

Methyl farnesoate (MF) plays hormonal regulatory roles in crustaceans. An epoxidated form of MF, known as juvenile hormone (JH), controls metamorphosis and stimulates reproduction in insects. To address the evolutionary significance of MF epoxidation, we generated mosquitoes completely lacking either of the two enzymes that catalyze the last steps of MF/JH biosynthesis and epoxidation, respectively: the JH acid methyltransferase (JHAMT) and the P450 epoxidase CYP15 (EPOX). jhamt−/− larvae lacking both MF and JH died at the onset of metamorphosis. Strikingly, epox−/− mutants, which synthesized MF but no JH, completed the entire life cycle. While epox−/− adults were fertile, the reproductive performance of both sexes was dramatically reduced. Our results suggest that although MF can substitute for the absence of JH in mosquitoes, it is with a significant fitness cost. We propose that MF can fulfill most roles of JH, but its epoxidation to JH was a key innovation providing insects with a reproductive advantage.

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The density of females of Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) affects their reproductive performance on pupae of Bombyx mori L. (Lepidoptera: Bombycidae)

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652010000200008 ◽

2010 ◽

Vol 82 (2) ◽

pp. 323-331 ◽

Cited By ~ 12

Author(s):

Fabricio F. Pereira ◽

José C. Zanuncio ◽

José E. Serrão ◽

Teresinha V. Zanuncio ◽

Dirceu Pratissoli ◽

...

Keyword(s):

Life Cycle ◽

Relative Humidity ◽

Sex Ratio ◽

Bombyx Mori ◽

Reproductive Performance ◽

Climatic Chamber ◽

Glass Tubes ◽

Bombyx Mori L

Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) is a gregarious and polyphagous parasitoid mainly of Lepidoptera pupae. The objective of this paper as to study the developent of parasitoid on Bombyx mori L. (Lepidoptera: Bombycidae) pupae exposed to one, nine, 18, 27, 36, 45 or 54 female P. elaeisis, respectively. The females of the parasitoid remained in contact with pupae for 24 hours in glass tubes (14.0 x 2.2 cm), packed in a climatic chamber regulated at 25 ± 2°C, 70 ± 10% relative humidity and photo phase of 12 hours. With the exception of density 1:1 (72.72%), in other densities parasitism was 100%. Adults of P. elaeisis did not emerge from pupae at densities of 1:1 and 9:1, but 100.0% of parasitoid emergence was observed at the density of 45:1 and 54.54% at 54:1. The duration of the life cycle of this parasitoid ranged from 20 to 28 days. P. elaeisis produced 49 to 589 descendants per pupa of B. mori. The sex ratio of P. elaeisis ranged from 0.93 ± 0.01 to 0.97 ± 0.01 without differences with 18, 27, 36, 45 and 54 females/host. This parasitoid should be reared with the density of 45 females per pupa of B. mori.

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Hybridization of Snake River Cutthroat in the Lower Gros Ventre River

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.2006.3665 ◽

2006 ◽

Vol 30 ◽

pp. 110-113

Author(s):

Ryan Kovach ◽

Lisa Eby

Keyword(s):

Exotic Species ◽

National Park ◽

Cutthroat Trout ◽

Snake River ◽

Oncorhynchus Clarki ◽

Oncorhynchus Clarkii ◽

Grand Teton National Park ◽

Water Diversions ◽

Yellowstone Cutthroat Trout ◽

Special Concern

The cutthroat trout Oncorhynchus clarki is Wyoming's only native trout. The Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) is designated as a "species of special concern" by a number of agencies and conservation groups. Although the Yellowstone cutthroat trout has recently avoided federal listing because of robust headwater populations (USFWS 2006), they face continued threats across their range. The fine-spotted Snake River native trout is a morphologically divergent ecotype of the Yellowstone subspecies, although it is not genetically distinguishable (Allendorf and Leary 1988, Novak et al. 2005). The Gros Ventre, an important tributary of the Snake River located partially in Grand Teton National Park, historically supported robust populations of fineÂ spotted Snake River cutthroat trout. Principal threats to Gros Ventre native trout, especially in the lower end of the drainage within the park boundaries, include both water diversions (loss of water and fish into irrigation ditches) and presence of exotic species.

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