A study of Texas shrimp populations, 1975

Simple item page
dc.acquisition-srcen_US
dc.call-noSH 11 .T4 A313 1975 c.1-2 GBAYen_US
dc.call-noSH 11 .T4 A313 1975en_US
dc.contract-noen_US
dc.contributor.authorJohnson, Roy B., Jr.en_US
dc.contributor.otherCoastal Fisheries project reportsen_US
dc.date.accessioned2010-02-15T16:57:18Z
dc.date.available2010-02-15T16:57:18Z
dc.date.issued1975en_US
dc.degreeen_US
dc.descriptionpgs. 1-35en_US
dc.description-otheren_US
dc.description.abstractDuring April-May 1975 brown shrimp (Penaeus aztecus) were sampled with bar seines and otter trawls at designated stations in Galveston, Matagorda, Aransas and Lower Laguna Madre Bays to determine shrimp growth rates and time of bay-to-Gulf migration. Although small groups of brown shrimp emigrated from Aransas Bay to Lower Laguna Madre in April and May, the mass migration of shrimp was late. The 1 June starting date of the closed Gulf season was retained. Estimated growth rates were 1.5 mm per day in Galveston and Matagorda Bays and 0.9-1.1 mm per day in Laguna Madre. During June-October 1975 white shrimp (P. setiferus) and brown shrimp were sampled with otter trawls to determine percentages of legal size shrimp on commercial shrimping grounds of Galveston, Matagorda and Aransas Bays. These percentages were fairly high (16-67%) near the 15 August opening of the bay season, and more than 10% were legal size through October. In Galveston Bay samples collected in late November and December contained less than 1% legal size shrimp. During 1973-75 less than 22.7 million kg of brown and white shrimp (heads-off) were landed annually at Texas ports, compared with the record 28.1 million kg in 1967. In 1975 financial problems with the shrimp industry and low shrimp densities contributed to low landings. Floods lowered the salinity to less than 5 o/oo in parts of Matagorda and Galveston Bays during April-May, reducing the amount of nursery area available to brown shrimp on the upper coast.en_US
dc.description.urien_US
dc.geo-codeTexas coasten_US
dc.geo-codeGalveston Bayen_US
dc.history7/31/06 eas; 2/16/06 easen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20380
dc.latitudeen_US
dc.locationGBIC Circulating Collection; TAMUG Circulating Collectionen_US
dc.longitudeen_US
dc.notesSource cited as Acc#2585. Other chapters are cited as Acc#2586, 2665, and 2666.en_US
dc.placeAustin, TXen_US
dc.publisherTexas Parks and Wildlife Departmenten_US
dc.relation.ispartofseries2585.10en_US
dc.relation.urihttp://coastal.tamug.edu/CoastalFisheries/fisheries.html#1975en_US
dc.scaleen_US
dc.seriesen_US
dc.subjectshrimp fisheriesen_US
dc.subjectpenaeid shrimpen_US
dc.subjectbrown shrimpen_US
dc.subjectPenaeus aztecusen_US
dc.subjectwhite shrimpen_US
dc.subjectPenaeus setiferusen_US
dc.subjecttrawl netsen_US
dc.subjectmigrationsen_US
dc.subjectcatch statisticsen_US
dc.titleA study of Texas shrimp populations, 1975en_US
dc.typeChapteren_US
dc.universityen_US
dc.vol-issue1975en_US

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