Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal
Nutritional qualities of fish processing by‐products can further be improved through enzymatic hydrolysis. The objective of this study was to elucidate the efficacy of hydrolysed milkfish offal at different inclusion levels when fed to juvenile grouper, Epinephelus fuscoguttatus, with an initial bod...
Saved in:
Main Authors: | , |
---|---|
Format: | text |
Published: |
Archīum Ateneo
2016
|
Subjects: | |
Online Access: | https://archium.ateneo.edu/biology-faculty-pubs/48 https://onlinelibrary.wiley.com/doi/full/10.1111/are.12999 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Ateneo De Manila University |
id |
ph-ateneo-arc.biology-faculty-pubs-1050 |
---|---|
record_format |
eprints |
spelling |
ph-ateneo-arc.biology-faculty-pubs-10502020-05-05T08:17:28Z Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal Ragaza, Janice A Mamauag, Roger Edward P Nutritional qualities of fish processing by‐products can further be improved through enzymatic hydrolysis. The objective of this study was to elucidate the efficacy of hydrolysed milkfish offal at different inclusion levels when fed to juvenile grouper, Epinephelus fuscoguttatus, with an initial body weight of 2.88 ± 0.06 g. The animals were fed for 56 days with seven diets supplemented with 0 (control), 5%, 15% and 25% of milkfish offal (MO) and milkfish offal hydrolysate (MOH). The diets were formulated to be isonitrogenous (45%) and isolipidic (11%). The diets were assigned to 21 tanks (15 fish per tank) with each diet having three replicates. Results from the experimental trials indicated that feed conversion efficiency, feed intake and weight gain of fish significantly (P < 0.05) improved when fed diets with MOH. No significant differences within the rest of the dietary treatments were observed. Survival rate (>90%) did not differ in all the dietary treatments. Proximate composition (crude protein, crude fat and ash) indicated no significant difference among fish fed from all the dietary treatments. Apparent digestibility of MOH indicated a 95% and 66% digestibility for protein and dry matter respectively. Plasma stress parameters (cortisol and glucose) were not influenced by the dietary treatment when fish were subjected to an acute stressor (5‐min chasing). Liver morphology indicated normal hepatocyte shape and the presence of lipid droplets in fish fed from all the dietary treatments. The results indicated that milkfish offal processed as hydrolysate can be utilized in grouper diets and can promote growth and feed efficiency when supplied at 10–15%. 2016-02-01T08:00:00Z text https://archium.ateneo.edu/biology-faculty-pubs/48 https://onlinelibrary.wiley.com/doi/full/10.1111/are.12999 Biology Faculty Publications Archīum Ateneo hydrolysate milkfish offal Epinephelus fuscoguttatus digestibility stress response Aquaculture and Fisheries Biology |
institution |
Ateneo De Manila University |
building |
Ateneo De Manila University Library |
continent |
Asia |
country |
Philippines Philippines |
content_provider |
Ateneo De Manila University Library |
collection |
archium.Ateneo Institutional Repository |
topic |
hydrolysate milkfish offal Epinephelus fuscoguttatus digestibility stress response Aquaculture and Fisheries Biology |
spellingShingle |
hydrolysate milkfish offal Epinephelus fuscoguttatus digestibility stress response Aquaculture and Fisheries Biology Ragaza, Janice A Mamauag, Roger Edward P Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
description |
Nutritional qualities of fish processing by‐products can further be improved through enzymatic hydrolysis. The objective of this study was to elucidate the efficacy of hydrolysed milkfish offal at different inclusion levels when fed to juvenile grouper, Epinephelus fuscoguttatus, with an initial body weight of 2.88 ± 0.06 g. The animals were fed for 56 days with seven diets supplemented with 0 (control), 5%, 15% and 25% of milkfish offal (MO) and milkfish offal hydrolysate (MOH). The diets were formulated to be isonitrogenous (45%) and isolipidic (11%). The diets were assigned to 21 tanks (15 fish per tank) with each diet having three replicates. Results from the experimental trials indicated that feed conversion efficiency, feed intake and weight gain of fish significantly (P < 0.05) improved when fed diets with MOH. No significant differences within the rest of the dietary treatments were observed. Survival rate (>90%) did not differ in all the dietary treatments. Proximate composition (crude protein, crude fat and ash) indicated no significant difference among fish fed from all the dietary treatments. Apparent digestibility of MOH indicated a 95% and 66% digestibility for protein and dry matter respectively. Plasma stress parameters (cortisol and glucose) were not influenced by the dietary treatment when fish were subjected to an acute stressor (5‐min chasing). Liver morphology indicated normal hepatocyte shape and the presence of lipid droplets in fish fed from all the dietary treatments. The results indicated that milkfish offal processed as hydrolysate can be utilized in grouper diets and can promote growth and feed efficiency when supplied at 10–15%. |
format |
text |
author |
Ragaza, Janice A Mamauag, Roger Edward P |
author_facet |
Ragaza, Janice A Mamauag, Roger Edward P |
author_sort |
Ragaza, Janice A |
title |
Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
title_short |
Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
title_full |
Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
title_fullStr |
Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
title_full_unstemmed |
Growth and feed performance, digestibility and acute stress response of juvenile grouper (Epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
title_sort |
growth and feed performance, digestibility and acute stress response of juvenile grouper (epinephelus fuscoguttatus) fed diets with hydrolysate from milkfish offal |
publisher |
Archīum Ateneo |
publishDate |
2016 |
url |
https://archium.ateneo.edu/biology-faculty-pubs/48 https://onlinelibrary.wiley.com/doi/full/10.1111/are.12999 |
_version_ |
1722366418685526016 |