Oyster spat recruitment methods12/23/2023 ![]() ![]() PLoS ONE 8:e65314īeukers JS, Jones GP (1997) Habitat complexity modifies the impact of piscivores on a coral reef fish population. Bioscience 61:107–116īeseres Pollack J, Yoskowitz D, Kim HC, Montagna PA (2013) Role and value of nitrogen regulation provided by oysters ( Crassostrea virginica) in the Mission-Aransas Estuary, Texas, USA. Corpus Christi Bay National Estuary Program, CCBNEP-17īeck MW, Brumbaugh RD, Airoldi L, Carranza A, Coen LD, Crawford C, Defeo O, Edgar GJ, Hancock B, Kay MC, Lenihan HS, Luckenbach MW, Toropova CL, Zhang GF, Guo XM (2011) Oyster reefs at risk and recommendations for conservation, restoration, and management. J Exp Mar Biol Ecol 366:8–15Īsquith WH, Mosier JG, Bush PW (1997) Status, trends, and changes in freshwater inflows to bay systems in the CCBNEP study area. Alternative substrates can provide important structural materials to support the development of oyster populations and nekton assemblages, and may be used to promote sustainable management of oyster reef resources via restoration.Īiroldi L, Balata D, Beck MW (2008) The gray zone: relationships between habitat loss and marine diversity and their applications in conservation. Prey mortality was similar across substrate types for both predators, and was significantly lower than no substrate and bare sand controls. To determine refuge value of the alternative substrates, we tested mud crab (Panopeidae) prey mortality with and pinfish ( Lagodon rhomboides) or blue crab ( Callinectes sapidus) predators. After 4 months, oyster spat recruitment density, nekton density and community structure were similar across substrate types-and analogous to those on natural reefs-but differed from samples collected on bare sediment. We used field experiments to quantify the effects of substrate type (concrete, porcelain, limestone, river rock, and oyster shell) on oyster recruitment, growth, and nekton habitat use in St. Oyster shell is the preferred substrate for oyster reef restoration, but as a consequence of its limited supply, a variety of alternative substrates are being used. Oyster reefs have suffered historic losses due to overharvest, disease, and degraded water quality, and recent efforts have focused on restoring reefs to benefit nekton populations. The national spat collection program will generate significant livelihood benefits across Fiji and support continued expansion of the Fijian cultured pearl industry.Eastern oysters ( Crassostrea virginica) in Gulf of Mexico estuaries create complex reefs and provide important habitat for fish and crustaceans. Results identified sites supporting high levels of pearl oyster recruitment as a basis for an ongoing national spat collection program, and support better targeting of spat collection activities that maximise oyster supply to the Fijian pearl industry. margaritifera based on greater levels of recruitment at these sites. penguin have greater tolerance of more turbid inshore sites than P. penguin ranged from 7.53 cm to 13.62 cm across sites. penguin were collected from all sites, with the highest number of recruits (495) recorded from Namarai (Viti Levu). margaritifera recruitment during the study and these were generally sites with relatively turbid water. margaritifera at any site was 8.61 ± 0.30 cm while the smallest was 4.26 ± 0.13 cm. The largest mean dorso-ventral measurement (DVM) of P. margaritifera juveniles were collected from all sites with the highest number of recruits (693) and the highest number of recruits per collector (2.10 ± 0.17) occurring at Nacobau (Vanua Levu). Spat collectors were deployed for a period of 10–15 months when the number of pearl oyster ( Pinctada margaritifera and Pteria penguin) spat attached to each collector was counted and shell size recorded. Spat collectors consisted of a 100 m longline from which 310 individual spat collectors were suspended. Twenty-nine sites across Fiji were used in this study. This supply can be inconsistent and a research program was implemented to determine recruitment of pearl oysters to spat collectors at sites throughout Fiji as a basis for developing a national spat collection program to improve reliability of oyster supply to the industry. Cultured pearl farming in Fiji relies on wild spat collection to supply the oysters used for pearl production.
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