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380 results on '"Grant, Alastair"'

134. Book reviews

Author

Richardson, Mervyn, primary, Grant, Alastair, additional, Rakel, Horst, additional, Voisey, Heather, additional, Knowler, Duncan, additional, Krueger, Jonathan, additional, Brown, K., additional, Brown, Katrina, additional, Edwards, Harry, additional, Henderson, Norman, additional, Rensburg, Thomas van, additional, Rowe, S. K., additional, Acharya, Gayatri, additional, Tansey, James, additional, Sutton, T. E., additional, Lewis, D. C., additional, Crowards, Tom, additional, O'Riordan, Timothy, additional, Whitton, Brian, additional, Lorenzoni, Irene, additional, Maher, Barbara, additional, Charlier, Roger H., additional, Jordan, Andrew, additional, Lotte, T. S., additional, Fitzgerald, M., additional, Barton, Jonathan R., additional, Griffiths, J.F., additional, Peres, Carlos, additional, Donoghue, Daniel N.M., additional, Haapasalo, Esa, additional, Yates, R. R., additional, and Ledoux, Laure, additional

Published
1998
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144. Indoor and Deep Sub-Tidal Intermediate Culture of Trochus niloticus for Restocking.

Author

Dolorosa, RogerG., Grant, Alastair, Gill, JenniferA., Avillanosa, ArleneL., and Gonzales, BenjaminJ.

Subjects
*TROCHUS niloticus, *FISH stocking, *FISH farming, *FISH populations, *SEASHELLS, *FISH growth, *MASS production
Abstract

The high demand for shells of the large reef-associated gastropodTrochus niloticusin the manufacture of mother-of-pearl buttons has resulted in a widespread decline of its population. As a consequence, juvenile mass production and restocking has been practiced as one of the many conservation measures. Trochus has long been successfully bred in captivity, but culturing of juveniles until ready for release is faced with many problems, including the shortage of natural food. Terrestrial plants have traditionally been used by fishermen as food in keeping wild trochus juveniles, but their potential use in intermediate culture of trochus has not been evaluated. We conducted four growth trials for 60–120 days, rearing hatchery-produced juveniles (10–28-mm shell diameter) at different stocking densities in indoor tanks and sea cages, with coconut leaves as the main or an additional substrate. An average growth rate of 4.4 mm mo−1(95% CL 4.0–4.7 mm mo−1) for all stocking densities was achieved in growth trials using small cages deployed at 5–6 m on the reef slope, which was comparable to growth rates in the wild. This growth rate was three times higher than in trials using large metal cages on the reef slope, and 2 to 23 times higher than indoor trials using wooden tanks or small cages in concrete tanks. Survival rates were as high as 99%. Incidence of escape in sub-tidal cages was low except when some cages were damaged by strong waves. The results indicate that trochus juveniles can be successfully cultured at high density in sub-tidal cages with coconut leaves as substrate. [ABSTRACT FROM PUBLISHER]

Published
2013
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145. Translocation of Wild Trochus niloticus : Prospects for Enhancing Depleted Philippine Reefs.

Author

Dolorosa, RogerG., Grant, Alastair, and Gill, JenniferA.

Subjects
*CHROMOSOMAL translocation, *TROCHUS niloticus, *FISH populations, *MARINE invertebrates, *HABITATS, *REEFS
Abstract

Intentional release of wild-caught individuals has been widely used to establish new populations of the commercially valuable but threatened reef gastropodTrochus niloticusin oceanic islands. Is this also a viable strategy to enhance depleted populations of this species and other marine invertebrates? We monitored growth and survival of 765 translocated individuals and 486 in their original habitat for 5–9 months. Individuals translocated to a severely overexploited reef (mainland Palawan) grew 2–3 times faster than those at Tubbataha Reefs Natural Park, Phillipines. Despite variations in growth between the three sites, survival probabilities were consistently high, ranging between 0.77 and 0.92. So translocation is feasible, and sites at which a species has previously been found are likely to be suitable for their growth and survival. If site management can control over-fishing, this approach is likely to be a valuable tool for enhancing field populations of a large invertebrates likeTrochusthat have a short lived planktonic larva. [ABSTRACT FROM PUBLISHER]

Published
2013
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146. Book reviews

Author

Dorling, Stephen, primary, Frost, S., additional, Walton, A. S., additional, MacGuire, Frances, additional, Sutton, Trevor A., additional, and Grant, Alastair, additional

Published
1992
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147. Book reviews

Author

Grant, Alastair, primary, Frost, S., additional, Simmons, I. G., additional, Rowan, P. R., additional, Norman, J. Nelson, additional, Edwards, Harry, additional, Johnson, James H., additional, and Esrom, P. J., additional

Published
1992
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149. Book reviews

Author

Jones, P., primary, Frost, S., additional, Walton, A. S., additional, Norman, J. Nelson, additional, Atkins, P. J., additional, Johnson, James H., additional, Lambert, Robert A., additional, Clayton, K. M., additional, Edwards, Harry, additional, McCallum, R. I., additional, Whitton, B. A., additional, Esrom, P. J., additional, Grant, Alastair, additional, Esrom, J. P., additional, and Jackson, C., additional

Published
1992
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150. Constraints on Salt Marsh Development Following Managed Coastal Realignment: Dispersal Limitation or Environmental Tolerance?

Author

Mossman, Hannah L., Brown, Michael J. H., Davy, Anthony J., and Grant, Alastair

Subjects
SALT marsh ecology, COASTAL zone management, ECOLOGY, RESTORATION ecology, PLANT species, COLONIZATION (Ecology)
Abstract

Salt marshes restored through managed coastal realignment (MR) often develop slowly and show persistent differences in vegetation from natural marshes. Development might be constrained by the availability of propagules or poor suitability of the abiotic environment for their establishment. To distinguish between these factors, we compared vegetation colonization and environmental conditions at a salt marsh created by MR at Brancaster, Norfolk, UK, with five reference marshes, varying in age from 30 to circa 6,000 years. After 5 years, plant communities of the MR site remained different from those in mature reference marshes. In contrast, the communities of the youngest reference marsh were not significantly different from mature reference marshes. At the MR site, abundance of perennial and later-successional species was low and large areas remained unvegetated. These differences are unlikely to be due to dispersal limitation, because 76% of the species from the local species pool colonized the site within 5 years. Although the annuals Salicornia europaea and Suaeda maritima were abundant by year 2, they were not ubiquitous until the end of the study. Tidal elevations of the MR site were suitable for vegetation development, but soil redox potentials were lower than that at the reference sites. Reducing conditions in the MR site appear to be the major cause of vegetation differences from the reference marshes, as they are associated with an abundance of bare ground and a small range of vegetation clusters. Measures to avoid low sediment redox potentials may have a great benefit in some salt marsh restoration projects. [ABSTRACT FROM AUTHOR]

Published
2012
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