Influence of algal exudates and bacteria on growth and survival of white shrimp larvae fed entirely on microencapsulated diets

A. O. Alabi, Zaidi Che Cob, D. A. Jones, J. W. Latchford

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Intact microencapsulated protozoeal diets (MED), added to 5 μm filtered hatchery water at the recommended concentration of 4 mg L-1 gave no significant difference in bacterial numbers after 6 h, over a 48 h period compared to control groups in autoclaved hatchery water. Disruption of the MED resulted in a significant increase in bacterial numbers up to 12 h compared to controls with intact microcapsules. Protein leach rates were similar in sterile water and 5 μm filtered water, indicating that leaching was independent of microbial activity. MED leached significantly less dietary solubles compared to a microparticulate diet (MPD). There was no evidence to suggest significant attachment of bacteria to diet particles for at least 48 h. In low-quality water after algal blooms, survival of white shrimp (Penaeus indicus) larvae was poor when reared in both sterile and 5 μm filtered water. The addition of bacteria filtered from xenic algal cultures together with the algal exudates to such water gave significant improvements in survival to larvae fed MED in 5 μm filtered water but not in autoclaved culture water. Live algal diets promote high larval survival and growth irrespective of the inclusion of bacteria. It is suggested that algal exudates act as selective bacteriocides and total replacement of algae with MED requires a balanced bacterial community which can be attained at times from natural sea water, or when the natural bacterial community balance is disturbed, corrected by the use of algal exudates.

Original languageEnglish
Pages (from-to)137-158
Number of pages22
JournalAquaculture International
Volume7
Issue number3
DOIs
Publication statusPublished - 1999

Fingerprint

shrimp
diet
larva
bacterium
larvae
bacteria
water
bacterial communities
hatchery
algae
hatcheries
Fenneropenaeus indicus
algal culture
algal blooms
microbial activity
leaching
algal bloom
water quality
seawater
replacement

Keywords

  • Algal exudates
  • Bacterial balance
  • Larval culture
  • Microencapsulated diets
  • White shrimp (Penaeus indicus)

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Influence of algal exudates and bacteria on growth and survival of white shrimp larvae fed entirely on microencapsulated diets. / Alabi, A. O.; Che Cob, Zaidi; Jones, D. A.; Latchford, J. W.

In: Aquaculture International, Vol. 7, No. 3, 1999, p. 137-158.

Research output: Contribution to journalArticle

@article{21d7752214c24a19989e6de78a6429e7,
title = "Influence of algal exudates and bacteria on growth and survival of white shrimp larvae fed entirely on microencapsulated diets",
abstract = "Intact microencapsulated protozoeal diets (MED), added to 5 μm filtered hatchery water at the recommended concentration of 4 mg L-1 gave no significant difference in bacterial numbers after 6 h, over a 48 h period compared to control groups in autoclaved hatchery water. Disruption of the MED resulted in a significant increase in bacterial numbers up to 12 h compared to controls with intact microcapsules. Protein leach rates were similar in sterile water and 5 μm filtered water, indicating that leaching was independent of microbial activity. MED leached significantly less dietary solubles compared to a microparticulate diet (MPD). There was no evidence to suggest significant attachment of bacteria to diet particles for at least 48 h. In low-quality water after algal blooms, survival of white shrimp (Penaeus indicus) larvae was poor when reared in both sterile and 5 μm filtered water. The addition of bacteria filtered from xenic algal cultures together with the algal exudates to such water gave significant improvements in survival to larvae fed MED in 5 μm filtered water but not in autoclaved culture water. Live algal diets promote high larval survival and growth irrespective of the inclusion of bacteria. It is suggested that algal exudates act as selective bacteriocides and total replacement of algae with MED requires a balanced bacterial community which can be attained at times from natural sea water, or when the natural bacterial community balance is disturbed, corrected by the use of algal exudates.",
keywords = "Algal exudates, Bacterial balance, Larval culture, Microencapsulated diets, White shrimp (Penaeus indicus)",
author = "Alabi, {A. O.} and {Che Cob}, Zaidi and Jones, {D. A.} and Latchford, {J. W.}",
year = "1999",
doi = "10.1023/A:1009257902630",
language = "English",
volume = "7",
pages = "137--158",
journal = "Aquaculture International",
issn = "0967-6120",
publisher = "Springer Netherlands",
number = "3",

}

TY - JOUR

T1 - Influence of algal exudates and bacteria on growth and survival of white shrimp larvae fed entirely on microencapsulated diets

AU - Alabi, A. O.

AU - Che Cob, Zaidi

AU - Jones, D. A.

AU - Latchford, J. W.

PY - 1999

Y1 - 1999

N2 - Intact microencapsulated protozoeal diets (MED), added to 5 μm filtered hatchery water at the recommended concentration of 4 mg L-1 gave no significant difference in bacterial numbers after 6 h, over a 48 h period compared to control groups in autoclaved hatchery water. Disruption of the MED resulted in a significant increase in bacterial numbers up to 12 h compared to controls with intact microcapsules. Protein leach rates were similar in sterile water and 5 μm filtered water, indicating that leaching was independent of microbial activity. MED leached significantly less dietary solubles compared to a microparticulate diet (MPD). There was no evidence to suggest significant attachment of bacteria to diet particles for at least 48 h. In low-quality water after algal blooms, survival of white shrimp (Penaeus indicus) larvae was poor when reared in both sterile and 5 μm filtered water. The addition of bacteria filtered from xenic algal cultures together with the algal exudates to such water gave significant improvements in survival to larvae fed MED in 5 μm filtered water but not in autoclaved culture water. Live algal diets promote high larval survival and growth irrespective of the inclusion of bacteria. It is suggested that algal exudates act as selective bacteriocides and total replacement of algae with MED requires a balanced bacterial community which can be attained at times from natural sea water, or when the natural bacterial community balance is disturbed, corrected by the use of algal exudates.

AB - Intact microencapsulated protozoeal diets (MED), added to 5 μm filtered hatchery water at the recommended concentration of 4 mg L-1 gave no significant difference in bacterial numbers after 6 h, over a 48 h period compared to control groups in autoclaved hatchery water. Disruption of the MED resulted in a significant increase in bacterial numbers up to 12 h compared to controls with intact microcapsules. Protein leach rates were similar in sterile water and 5 μm filtered water, indicating that leaching was independent of microbial activity. MED leached significantly less dietary solubles compared to a microparticulate diet (MPD). There was no evidence to suggest significant attachment of bacteria to diet particles for at least 48 h. In low-quality water after algal blooms, survival of white shrimp (Penaeus indicus) larvae was poor when reared in both sterile and 5 μm filtered water. The addition of bacteria filtered from xenic algal cultures together with the algal exudates to such water gave significant improvements in survival to larvae fed MED in 5 μm filtered water but not in autoclaved culture water. Live algal diets promote high larval survival and growth irrespective of the inclusion of bacteria. It is suggested that algal exudates act as selective bacteriocides and total replacement of algae with MED requires a balanced bacterial community which can be attained at times from natural sea water, or when the natural bacterial community balance is disturbed, corrected by the use of algal exudates.

KW - Algal exudates

KW - Bacterial balance

KW - Larval culture

KW - Microencapsulated diets

KW - White shrimp (Penaeus indicus)

UR - http://www.scopus.com/inward/record.url?scp=0032777179&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032777179&partnerID=8YFLogxK

U2 - 10.1023/A:1009257902630

DO - 10.1023/A:1009257902630

M3 - Article

VL - 7

SP - 137

EP - 158

JO - Aquaculture International

JF - Aquaculture International

SN - 0967-6120

IS - 3

ER -