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  • 1
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    Analysis of Populations of Sports and Commercial Fin-fish in the Coastal Bays of Texas (2021)
    Texas Parks and Wildlife Department | Austin, TX
    In:  http://aquaticcommons.org/id/eprint/14242 | 9596 | 2020-08-31 20:19:45 | 14242 | Galveston Bay Information Collection
    Details
    Publication Date: 2021-06-24
    Description: Juvenile game fish were sampled in 1968 in all Texas bay areas with 60 ft. bag seines; adult fish were sampled in Galveston Bay by drag seine and in Aransas Bay and the Upper and Lower Laguna Madre with trammel nets. A general and significant increase in the relative abundance of juvenile redfish, Sciaenops ocellata, was noted. In the case of trout, Cynoscion nebulosus, flounder, Paralichthys lethostigma, black drum, Pogonias cromis, and sheepshead, Archosargus probatocephalus, there was either a decline in general abundance or no significant change from the previous year. While variations in abundance of adult fish occurred within bays, no coastwide patterns could be discerned. These samples were obtained in order to determine relative abundance, seasonal fluctuations in abundance and success of spawning. Captured fish of sufficient size and in good condition were tagged and released to study movements, migrations and rate of fishing harvest.
    Keywords: Ecology ; Fisheries ; marine fish ; game fish ; finfish fisheries ; juveniles ; commercial species ; population dynamics ; seine nets ; entangling nets ; abundance ; seasonal variations ; spawning ; GBIC
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
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  • 2
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    Coordination of Coastwide Fin-Fish Investigations Project (2021)
    Texas Parks and Wildlife Department | Austin, TX
    In:  http://aquaticcommons.org/id/eprint/14189 | 9596 | 2020-08-31 20:29:00 | 14189 | Galveston Bay Information Collection
    Details
    Publication Date: 2021-06-24
    Description: This report is based upon a total of 975 collections made during 1963. Two hundred and twelve of these were trammel net of drag seine collections for sampling adult game fish. Two hundred and fifty-four were seine collections for sampling juvenile game fish. Five hundred and nine samples were made with trawls to sample forage species.
    Keywords: Ecology ; Fisheries ; marine fish ; seine nets ; trawl nets ; entangling nets ; juveniles ; game fish ; finfish fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 49
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  • 3
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    The Mergers in Abell 2256: Displaced Gas and its Connection to the Radio-emitting Plasma (2020)
    Oxford University Press
    Details
    Publication Date: 2020-06-01
    Description: We present the results of deep Chandra and XMM-Newton X-ray imaging and spatially-resolved spectroscopy of Abell 2256, a nearby (z = 0.058) galaxy cluster experiencing multiple mergers and displaying a rich radio morphology dominated by a large relic. The X-ray data reveals three subclusters: (i) the ‘main cluster’; (ii) the remnant of an older merger in the east of the cluster with a ∼600 kpc long tail; (iii) a bright, bullet-like, low-entropy infalling system, with a large line-of-sight velocity component. The low-entropy system displays a 250 kpc long cold front with a break and an intriguing surface brightness decrement. Interestingly, the infalling gas is not co-spatial with bright galaxies and the radio loud brightest cluster galaxy of the infalling group appears dissociated from the low entropy plasma by ∼50 kpc in projection, to the south of the eastern edge of the cold front. Assuming that the dark matter follows the galaxy distribution, we predict that it is also significantly offset from the low-entropy gas. Part of the low frequency radio emission near the cold front might be revived by magnetic field amplification due to differential gas motions. Using analytical models and numerical simulations, we investigate the possibility that the supersonic infall of the subcluster generates a large scale shock along our line-of-sight, which can be detected in the X-ray temperature map but is not associated with any clear features in the surface brightness distribution.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press on behalf of The Royal Astronomical Society.
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