Thermal and dietary optimization in the hatchery culture of juvenile Pacific geoduck clams (Panopea generosa, Gould 1850)
department or school: Land and Food Systems, Faculty of
data provider: DSpace
degree campus: UBCV
creator: Arney, Bianca Danielle
issued: 2013-10-01T14:44:30Z
issued: 2013
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: This research is the first to examine thermal and dietary optimization in the hatchery culture of juvenile Pacific geoduck (Panopea generosa). Chapter 2 investigated temperature and feed ration optimization; chapter 3 examined live algae substitution with the spray-dried species, Schizochytrium spp. or Spirulina (Arthrospira platensis). Geoduck growth and survival were measured to quantify treatment success. The temperature trial tested four temperatures (7, 11, 15, 19 °C) in juvenile and post-larval culture. Temperature promoted a significant growth effect in both sizes. The 19 °C culture elicited a delayed growth benefit in juveniles, and suppressed ash-free dry weight (AFDW), which recommends utilization of 15 °C. In contrast, geoduck post-larvae displayed immediate (post 7 d) shell growth acceleration at 19 °C. The 19 °C temperature shortened the rearing period by 2.9 d, suggesting its application in post-larval culture. The ration experiment examined the feed ration requirements of four geoduck juvenile size classes. Ration quantities between 0.0 - 128.0x10⁶ equivalent Isochrysis cells individual⁻¹ day⁻¹ were tested. All treatments received Chaetoceros muelleri and Isochrysis sp. mixed by AFDW. Following shell length/wet weight optimization, the following rations (10⁶ equivalent Isochrysis cells individual⁻¹ day⁻¹) should be applied between week 1 and 4 of the tested geoduck culture: 4.0 (1); 8.0 (2); 16.0 or 32.0 (shell length or wet weight optimum, respectively; 3); and 32.0 (4). The algae substitution trial replaced the above bi-algae diet with variant levels (0, 25, 50, 75, 100%) of Schizochytrium or Spirulina in two size classes. Between spray-dried diets, Spirulina treatments enhanced geoduck growth. However, overall growth displayed a general decline with elevated spray-dried inclusion and maximal growth occurred between 0 – 25% substitution. The superior bi-algae diet contained a polyunsaturated fatty acid Σn – 3/n – 6 ratio of 2.9, a value conserved in…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/45170
note: THERMAL AND DIETARY OPTIMIZATION IN THE HATCHERY CULTURE OF JUVENILE PACIFIC GEODUCK CLAMS (PANOPEA GENEROSA, GOULD 1850) by Bianca Danielle Arney B.Sc. (Hons.), Hawaii Pacific University, 2009 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in The Faculty of Graduate and Postdoctoral Studies (Applied Animal Biology) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) September 2013 ? Bianca Danielle Arney, 2013 ii Abstract This research is the first to examine thermal and dietary optimization in the hatchery culture of juvenile Pacific geoduck (Panopea generosa). Chapter 2 investigated temperature and feed ration optimization; chapter 3 examined live algae substitution with the spray-dried species, Schizochytrium spp. or Spirulina (Arthrospira platensis). Geoduck growth and survival were measured to quantify treatment success. The temperature trial tested four temperatures (7, 11, 15, 19 ?C) in juvenile and post-larval culture. Temperature promoted a significant growth effect in both sizes. The 19 ?C culture elicited a delayed growth benefit in juveniles, and suppressed ash-free dry weight (AFDW), which recommends utilization of 15 ?C. In contrast, geoduck post-larvae displayed immediate (post 7 d) shell growth acceleration at 19 ?C. The 19 ?C temperature shortened the rearing period by 2.9 d, suggesting its application in post-larval culture. The ration experiment examined the feed ration requirements of four geoduck juvenile size classes. Ration quantities between 0.0 - 128.0x10? equivalent Isochrysis cells individual?? day?? were tested. All treatments received Chaetoceros muelleri and Isochrysis sp. mixed by AFDW. Following shell length/wet weight optimization, the following rations (10? equivalent Isochrysis cells individual?? day??) should be applied between week 1 and 4 of the tested geoduck culture: 4.0 (1); 8.0 (2); 16.0 or 32.0 (shell length or wet weight optimum, respectively; 3); and 32.0 (4). The algae subst…
has type: Thesis/Dissertation
date issued: 2013-11
is shown at: 10.14288/1.0165532
language: eng
degree discipline: Applied Animal Biology
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/45170