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Your search keyword '"Blake, Norman J."' showing total 83 results
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83 results on '"Blake, Norman J."'

7. The reproductive cycle of the scallop Pecten sulcicostatus from the Southern Benguela upwelling system

Author

Arendse, Dale C.Z., Andersen, Sissel, Blake, Norman J., and Pitcher, Grant C.

Subjects
Upwelling (Oceanography) -- Influence -- Environmental aspects -- Physiological aspects -- Research, Scallops -- Physiological aspects -- Sexual behavior -- Environmental aspects -- Research, Biological sciences, Zoology and wildlife conservation, Influence, Physiological aspects, Sexual behavior, Research, Environmental aspects
Abstract

ABSTRACT The reproductive cycle of Pecten sulcicostatus is described as part of an investigation into the potential commercial culture of this species in South Africa. Scallops were collected monthly from [...]

Published
2008

9. Restoration of bay scallop (Argopecten irradians (Lamarck)) populations in Florida coastal waters: planting techniques and the growth, mortality and reproductive development of planted scallops

Author

Arnold, William S., Blake, Norman J., Harrison, Melissa M., Marelli, Dan C., Parker, Melanie L., Peters, Sarah C., and Sweat, Don E.

Subjects
Scallops -- Protection and preservation -- Growth -- Research, Biological sciences, Zoology and wildlife conservation, Company growth, Protection and preservation, Growth, Research
Abstract

ABSTRACT Bay scallops (Argopecten irradians [Lamarck]) are a culturally and economically important component of Florida's nearshore marine community. However, many of the local populations that compose the hay scallop metapopulation [...]

Published
2005

10. The reproductive cycle of the flame scallop, Ctenoides scaber (born 1778), from the lower Florida Keys and its relationship with environmental conditions

Author

Dukeman, Angela K., Blake, Norman J., and Arnold, William S.

Subjects
Sex ratio -- Statistics -- Research -- Protection and preservation -- Environmental aspects, Scallops -- Research -- Environmental aspects -- Protection and preservation -- Statistics, Biological sciences, Zoology and wildlife conservation, Statistics, Protection and preservation, Research, Environmental aspects
Abstract

ABSTRACT The reproductive cycle, sex distribution, and gonadal characteristics of the flame scallop, Ctenoides scaber, formerly Lima scabra scabra (Born 1778), collected from Boca Chica Key, FL, were investigated over [...]

Published
2005

20. Aquaculture and marketing of the Florida Bay Scallop in Crystal River, Florida

Author

Blake, Norman J., Adams, Charles, Degner, Robert, Sweat, Don, Moss, Susan D., and Sturmer, Leslie

Subjects
aquaculture, Florida Bay Scallops, marketing, Florida, Crystal River, Argopecten irradians, Biology
Abstract

The overall goal of this study was to develop a new fishery resource product through open-wateraquaculture for the west coast of Florida that would compete as a non-traditional product through marketdevelopment. Specific objectives were as follows:I. To grow a minimum of 50, 000 juvenile scallops to a minimum market size of40 mm in a cageand float system in the off-shore waters of Crystal River, Florida.2. To determine the growth rate, survival, and time to market size for the individuals in this systemand area to other similar projects like Virginia.3. To introduce local fishermen and the aquaculture students at Crystal River High School to thehatchery, nursery, and grow-out techniques.4. To determine the economic and financial characteristics of bay scallop culture in Florida andassess the sensitivity of projected costs and earnings to changes in key technical, managerial, andmarket related parameters.5. To determine the market acceptability and necessary marketing strategy for whole bay scallopproduct in Florida. (PDF has 99 pages.) Final report on Project RlLR·A·20

Published
2000

21. Bioaccumulation and histopathological effects of oil on a stony coral

Author

Department of Atmospheric and Oceanic Science, The University of Michigan, Ann Arbor, MI 48109, USA, Department of Marine Science, University of South Florida, St. Petersburg, FL 33701, USA, Environmental Research Laboratory, United States Environmental Protection Agency, Narragansett, RI 02882, USA, Peters, Esther C., Meyers, Philip A., Yevich, Paul P., Blake, Norman J., Department of Atmospheric and Oceanic Science, The University of Michigan, Ann Arbor, MI 48109, USA, Department of Marine Science, University of South Florida, St. Petersburg, FL 33701, USA, Environmental Research Laboratory, United States Environmental Protection Agency, Narragansett, RI 02882, USA, Peters, Esther C., Meyers, Philip A., Yevich, Paul P., and Blake, Norman J.

Abstract

Colonies of the shallow-water Caribbean coral Manicina areolata incorporated petroleum hydrocarbons into their tissues during exposure to water accommodated fractions of No. 2 fuel oil for three months. This contamination was not removed after depuration periods of up to two weeks. Although these corals remained alive, evidence of pathological responses was found which included impaired development of reproductive tissues, degeneration and loss of symbiotic zooxanthellae, and atrophy of mucous secretory cells and muscle bundles.

Published
2006

23. 17: Bay Scallop and Calico Scallop Fisheries, Culture and Enhancement in Eastern North America: REFERENCES.

Author

Blake, Norman J. and Shumway, Sandra E.

Abstract

Chapter 17 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

24. 17: Bay Scallop and Calico Scallop Fisheries, Culture and Enhancement in Eastern North America: 17.3 AQUAGULTURE AND ENHANCEMENT.

Author

Blake, Norman J. and Shumway, Sandra E.

Abstract

Chapter 17 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

25. 17: Bay Scallop and Calico Scallop Fisheries, Culture and Enhancement in Eastern North America: 17.2 FISHERIES.

Author

Blake, Norman J. and Shumway, Sandra E.

Abstract

Chapter 17 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

26. 6: Reproductive Physiology: REFERENCES.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

27. 6: Reproductive Physiology: 6.5 APPLICATIONS TO AQUACULTURE.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

28. 6: Reproductive Physiology: 6.4 ENERGY METABOLISM.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

29. 6: Reproductive Physiology: 6.3 REGULATION OF GAMETOGENIC CYCLES.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

30. 6: Reproductive Physiology: 6.2 GAMETOGENIC CYCLES.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

31. Paul Peter Yevich

Author

Peters, Esther C., primary, Gardner, George R., additional, Blake, Norman J., additional, and Borsay, Doranne J., additional

Published
1995
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33. 6: Reproductive Physiology: 6.6 SUMMARY.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

34. THE REPRODUCTIVE CYCLE OF THE SCALLOP PECTEN SULCJCOSTA TUS FROM THE SOUTHERN BENGUELA UP WELLING SYSTEM.

Author

Arendse, Dale C. Z., Andersen, Sissel, Blake, Norman J., and Pitcher, Grant C.

Abstract

The reproductive cycle of Pecten sulcicostatus is described as part of an investigation into the potential commercial culture of this species in South Africa. Scallops were collected monthly from False Bay, from August 2004 to October 2005, to determine seasonal variation in the gonadosomatic index (GSI) and to assess associated histological changes within the gonads. The reproductive cycle of P. sulcicostalus demonstrated clear seasonality. The mean GSI was highest from June to September (winter to early spring), and lowest from November to January (late spring to summer). The GSI findings were corroborated by histological analysis of the gonads with the mean oocyte diameter reaching a maximum in August and a minimum in November. Seasonal stratification and corresponding changes in phytoplankton biomass are considered to control the reproductive cycle of P. sulcicostatus in False Bay as winter spawning and the subsequent decline in the GSI coincide with the transition to spring upwelling conditions and a decline in bottom water temperature and food availability. [ABSTRACT FROM AUTHOR]

Published
2008
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35. BIOCHEMICAL UTILIZATION DURING EMBRYOGENESIS AND METAMORPHOSIS IN THE BAY SCALLOP, ARGOPECTEN IRRADIANS CONCENTRICUS (SAY).

Author

Lu, Yantian T., Blake, Norman J., and Torres, Joseph J.

Abstract

Protein, total lipid, and carbohydrate were measured for spawned eggs, D-shaped larvae, premetamorphic, and metamorphic larvae of the bay scallop Argopecten irradians concentricus (Say). Spawned eggs were composed of 64.0% protein, 26.5% lipid, and 9.5% carbohydrate. After 48 hours of embryogenesis, 13.6% of the protein, 46.3% of the lipid, and 20.8% of the carbohydrate mass had been lost, providing 25.5%, 69.8%, and 4.8% of the total energy expenditure of 0.176 mJ per embryo. During 48 hours of metamorphosis, lipid was utilized first, followed by a heavy consumption of protein; protein, lipid and carbohydrate lost 55.6%, 59.4%, and 67.3% of their mass respectively. Protein and lipid supplied a comparable amount of energy for metamorphosis, 47.9% and 43.5%, respectively; whereas, carbohydrate contributed only 8.6%, to the 4.35 mJ per larva metamorphic energy expenditure. [ABSTRACT FROM AUTHOR]

Published
1999

36. OXYGEN CONSUMPTION AND AMMONIA EXCRETION OF LARVAE AND JUVENILES OF THE BAY SCALLOP, ARGOPECTEN IRRADIANS CONCENTRICUS (SAY).

Author

Lu, Yantian T., Blake, Norman J., and Torres, Joseph J.

Abstract

Rates of oxygen consumption and ammonia excretion were determined at 25 °C for larval and juvenile bay scallops Argopecten irradians concentricus. Oxygen consumption rate (Vo2, μIO2 h-1) varied with body size ash-free dry weight (AFDW, mg) according to the relation Vo2 = 7.199 AFDW0.921 for larvae and Vo2 = 2.142 AFDW0.905 for juveniles. Mean weight-specific Vo2 ranged from 14.66 to 15.84 μIO2 mg AFDW-1 h-1 for larvae and from 1.80 to 5.28 μIO2 mg AFDW-1 h-1 for juveniles. Weight-specific Vo2 declined with increasing body size at > 2 mm shell height but became independent of body size at > 2 mm shell height. Swimming was estimated to cause 8 to 29% of the total larval oxygen demand. In juveniles of 3.5 to 5.0 mm shell height, Vo2 increased as temperature increased from 15 to 30 °C, being 1.24 ± 0.35, 1.77 ± 0.70, 2.33 ± 0.85., and 2.74 ± 0.57 μIO2 mg AFDW-1 h-1 at 15, 20, 25 and 30°C, respectively. The Q10 was 2.99 at 15 to 20°C, 1.74 at 20 to 25 °C and 1.37 at 25 to 30°C. Ammonia excretion rate (U, μgNH4-N h-1) increased with body size following the equation U = 0.161 AFDW0.928. Energy loss through ammonia excretion was equal to 1.5 to 3.7% and 13.5 ± 2.8% of the respiratory energy loss in larvae and juveniles, respectively. [ABSTRACT FROM AUTHOR]

Published
1999

37. INTRA-ORGAN BIOCHEMICAL TRANSFORMATIONS ASSOCIATED WITH OOGENESIS IN THE BAY SCALLOP, ARGOPECTEN IRRADIANS CONCENTRICUS(SAY), AS INDICATED BY 14C INCORPORATION

Author

BARBER, BRUCE J. and BLAKE, NORMAN J.

Abstract

Incorporation of 14C into lipid, carbohydrate, and protein fractions of digestive gland, adductor muscle, and ovary body components of the bay scallop, Argopecten irradians concentricus(Say), varied seasonally in conjunction with oogenesis. Resting stage scallops (June-July) were characterized by net radiocarbon losses in ovary fractions. Nutrient storage during this period was indicated by relatively small radiocarbon losses in digestive gland fractions that were equaled by gains in adductor muscle carbohydrate and protein fractions. During the period of oocyte growth (August-October) 14C losses in digestive gland and adductor muscle fractions always exceeded progressive gains in the ovary. Increased carbon turnover (catabolism) of digestive gland lipid and adductor muscle carbohydrate fractions accompanied decreased turnover (anabolism) of ovary lipid, indicating the utilization of these reserves for the production of ova. After spawning (November), 14C was lost from all body component fractions, indicating a state of negative energy balance and generally poor physiological condition. These results directly reinforce the pattern of energy storage and utilization in A. irradians concentricusindicated by previous studies on growth, biochemical composition, and substrate catabolism.

Published
1985
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50. 6: Reproductive Physiology: 6.1 INTRODUCTION.

Author

Barber, Bruce J. and Blake, Norman J.

Abstract

Chapter 6 of the book "Scallops: Biology, Ecology and Aquaculture," Second Edition, edited by Sandra E. Shumway and G. Jay Parsons is presented. It deals with the interest in all aspects of scallop biology and ecology. Moreover, it provides a comprehensive overview of the biology, ecology and aquaculture for scallop species worldwide. It focuses on efforts in presenting discussions regarding the need for a comprehensive treatise and researches on scallops.

Published
2006

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