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عنوان فارسی مقاله:
ارزیابی سهام برای تولید صدف خوراکی شرقی و مزارع پرورشی در لوئیزیانا
عنوان انگلیسی مقاله:
Stock assessment for eastern oyster seed production and field grow-out in Louisiana
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Louisiana leads the nation in the production of oysters, typically accounting for about 34% of the nation's landings and over 55% of the landings along the Gulf of Mexico in 2012 (Louisiana Department of Wildlife and Fisheries, LDWF, 2014). The success of the Louisiana eastern oyster industry is due in large part to an effective public/private partnership in which the LDWF manages the public grounds for the production of seed oysters (25–75 mm) for transplant to private leases where they are cultivated on-bottom and subsequently harvested. While eastern oysters continue to support a viable industry, increased harvest of seed and market oysters from public grounds in recent years has resulted in a net deficit of shell negatively impacting the availability of seed oysters for private leases (Soniat et al., 2012). Moreover, the variability in seed availability from year to year due to natural fluctuations in reproduction and recruitment of wild oysters along with unpredictable mortalities due to predation and disease during on-bottom grow-out on leases that can reach 50 to 85%, continue to be problematic for oyster farmers (Owen, 1953; Powell et al., 1996; La Peyre et al., 2016). Intensive oyster aquaculture, which combines hatchery production of seeds and improved grow-out methods, could play an important role in increasing production and sales of oysters from Louisiana and other Gulf States (Maxwell et al. 2008; Walton et al., 2013). Hatchery production can also serve to augment production of public oyster beds as previously attempted in Chesapeake Bay and recently implemented in Louisiana estuaries by LDWF, or in restoration activities (Carlsson et al., 2008; La Peyre et al., 2014). A major advantage with using hatchery produced seed is that it enables selection of broodstocks best adapted to local environmental conditions (Frank-Lawale et al., 2014). Previous studies have shown that optimal temperature and salinity combinations for oyster health and reproduction are population-dependent (Barber et al., 1991 Dittman et al., 1998; Brown et al., 2005; Burford et al., 2014). Moreover, oysters can also be selected on the basis of their increased survival after challenge with Perkinsus marinus, the protistan parasite causing dermo disease that is prevalent in Gulf of Mexico estuaries. The need to develop stocks of locally adapted oysters that are resistantto disease has long been recognized (Haskin & Ford, 1979; Matthiessen et al., 1990; Ragone Calvo et al., 2003a). To date, little information has been gathered on the performance of Louisiana oyster populations from various Louisiana estuaries limiting the ability to choose stocks for hatchery seed production and predict their performance in varying environmental conditions. Given Louisiana estuaries wide range of salinity and the increasing interest in oyster aquaculture and restoration efforts, there is a need to determine the performance of oysters from various Louisiana estuaries. This is especially critical as LDWF policy is to avoid the introduction of out of state oysters into Louisiana waters. The objectives of this study were therefore to compare the mortality, growth, condition index and dermo infection intensity of the progeny of wild oysters collected from public oyster grounds of three Louisiana estuaries differing in salinity regime. In addition, a fourth group of Louisiana oysters consisting of the progeny of a stock selected for increased dermo resistance was included for comparison. The hatchery produced progenies of the four oyster broodstocks were deployed at three sites along a salinity gradient in Breton Sound estuary, LA and at a high salinity site off Grand Isle in Barataria Bay estuary, LA to represent different grow-out environmental conditions. Breton sound is a key public oyster ground that has experienced a significant decline in harvest in recent years and has been targeted for seeding with hatchery propagated oysters by LDWF (Soniat et al., 2012; La Peyre et al., 2013; LDWF, 2014).
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کلمات کلیدی:
Analysis of Environmental Factors Influencing Salinity Patterns, Oyster ... www.jcronline.org › Journal of Coastal Research › Volume 32, Issue 3 by MK La Peyre - 2016 - Cited by 7 - Related articles Megan K. La Peyre, James Geaghan, Gary Decossas, and Jerome F. La Peyre (2016) ... for eastern oyster seed production and field grow-out in Louisiana. Increased Temperatures Combined with Lowered Salinities ... - BioOne www.bioone.org › All Titles › Journal of Shellfish Research › Apr 2016 by M Rybovich - 2016 - Cited by 4 - Related articles Regardless of temperature, seed and market oysters held in low salinity tanks (salinity 1) ..... for eastern oyster seed production and field grow-out in Louisiana. Performance of Sweetpotato Foundation Seed after Incorporation into ... horttech.ashspublications.org/content/20/6/977.full by CA Clark - 2010 - Cited by 11 - Related articles A survey was conducted in Louisiana from 2007 to 2009 to examine the ... G1 seed [grown 1 year after virus therapy in the foundation seed production field at the .... Yuma, AZ) at 2.25 lb/1000 ft2 onto the roots laid out in the beds, covering the ... [PDF]Crop Profile for Sugarcane in Louisiana - National IPM Database https://ipmdata.ipmcenters.org/documents/cropprofiles/LAsugarcane2014.pdf 400,000 harvested for sugar and 28,000 acres harvested for seed. ... Sugarcane is grown in at least 22 parishes in the south central part of the state, ... Irrigation is not common in Louisiana but is sometimes carried out on a few farms .... sugarcane production cycle, prior to placing a production field into one year of fallow. [PDF]Louisiana Rice - LSU AgCenter www.lsuagcenter.com/NR/rdonlyres/...346A.../pub2321RiceProdHdbkJune09.pdf In the United States, rice is grown on approximately 3 million acres in two distinct ... In 1987, the first “Louisiana Rice Production Handbook” was published .... ability to flood and drain rice fields in a timely man- ner. .... 125 pounds of seed per acre for water-seeding rice ..... a vacuum pump that vacuums the anther out of the. [PDF]pdf (a recent annual report). - Nicholls State University https://www.nicholls.edu/biol-jc/Nicholls_Farm.../LNPI-Nicholls-Farm-201011.pdf (Field C; Table 3). Seed production resulting from the foundation block is second filial generation ... growing throughout south Louisiana was established to block A7 (Field A) in. 2007. .... transplanted to containers for grow out. The container ...
