Results 261 to 270 of about 3,638 (297)

Reproductive biology of the rosylip sculpin, an intertidal spawner

Journal of Fish Biology, 2004
Rosylip sculpin Ascelichthys rhodorus spawned in the intertidal during the winter in the north‐eastern Pacific. Large numbers of males typically congregated at spawning sites, where females deposited clutches. The mating system of this species was external fertilization and group spawning at specific oviposition sites under boulders in the intertidal ...
PETERSEN C. W., ZARRELLA K. A., RUBEN C. A., MAZZOLDI, CARLOTTA   +3 more
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Performance of Spawner Survey Techniques at Low Abundance Levels

North American Journal of Fisheries Management, 2010
Abstract Population monitoring is essential to know whether coastal California's Endangered Species Act–listed Chinook salmon Oncorhynchus tshawytscha, coho salmon O. kisutch, and steelhead O. mykiss stocks are progressing toward recovery.
Sean P. Gallagher, Peter B. Adams, David W. Wright, Barry W. Collins   +3 more
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Fecundity and Spawning Frequency of the Fathead Minnow—A Fractional Spawner

Transactions of the American Fisheries Society, 1982
Abstract Six pairs of fathead minnows Pimephales promelas were isolated in 0.3 × 1.5-m spawning (wading) pools partially submerged in an outdoor swimming pool from May 20 through October 20, 1980. Five pairs of fish that survived the experiment produced from 16 to 26 clutches of eggs each between May 22 and August 22.
William F. Gale, Gerard L. Buynak
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Object Spawner Tool Using EditorTool and ScriptableObject

2021
In this chapter, you are going to create a little object spawner editor tool to learn how editor scripting with IMGUI can be applied in a practical scenario and to explore some advanced editor topics such as EditorTool and ScriptableObject in this context.
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Precision and Accuracy of Estimators of the Proportion of Hatchery‐Origin Spawners

Transactions of the American Fisheries Society, 2012
AbstractFor salmon populations in the Columbia River basin, many of which are listed under the U.S. Endangered Species Act of 1973, reliable estimation of the proportion of hatchery‐origin spawners in spawning areas (p) is needed to make inferences about their status and potential for interbreeding with wild‐origin adults, which may reduce the genetic ...
Richard A. Hinrichsen, Rishi Sharma, Timothy R. Fisher   +2 more
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Hydration of female spawners of carps during hypophysation

Hydrobiologia, 1980
Those female major carps which gained weight after injection of pituitary extract to induce spawning, ovulated more successfully than those which did not. In practice, therefore, fishes which lose weight upto the second of the two injections customarily given, may not be injected further. The gain in weight is caused by induced hydration of the spawner.
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The Evolution of Reproductive Phenology in Broadcast Spawners and the Maintenance of Sexually Antagonistic Polymorphism

The American Naturalist, 2017
Reproductive phenology is a crucial life-history trait that evolves in response to external environmental conditions and frequency- and density-dependent interactions within species. Broadcast spawners-which represent a large fraction of aquatic biodiversity-evolve phenologies that balance strong density-dependent fertilization success against abiotic ...
Colin, Olito, Dustin J, Marshall, Tim, Connallon   +2 more
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Influence of Rainfall on Optimal Spawner Catch for the Shrimp Fishery in Iran

North American Journal of Fisheries Management, 2003
Abstract Penaeid shrimp culture in Iran depends on a supply of spawners from the sea for seed production. The inadequate stock of wild Indian white shrimp Penaeus indicus spawners for hatcheries is a bottleneck to the development of Iran's shrimp culture.
Abdoulkarim Esmaeili, Ishak Omar
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Precise Timing of Upstream Migrations by Repeat Steelhead Spawners

Transactions of the American Fisheries Society, 1985
Abstract Summer and winter races of steelhead Salmo gairdneri were tagged in the Kalama River, Washington, during spawning migrations of 1976–1982. Some marked fish returned to the tagging site during spawning runs 1–2 years later. Using 2-week sampling strata, the date of subsequent return was significantly related to the prior time of tagging for ...
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Reproductive cycles in a reared strain of the mummichog, a daily spawner

Journal of Fish Biology, 1997
Annual, lunar, and diel samplings were taken from a strain of mummichog (Arasaki strain) reared in outdoor tanks under natural conditions, to examine gonadal maturity. Gonads of yearling fish were quite immature in September. During late autumn and winter, a gradual increase in the GSI of both sexes was observed, and the growth of cortical alveolus ...
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