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Minimizing the Use of Live Feeds Dur...

Murray, Casey.

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Minimizing the Use of Live Feeds During the Larviculture of Five Ornamental Fish Species.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Minimizing the Use of Live Feeds During the Larviculture of Five Ornamental Fish Species./
Author:	Murray, Casey.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	215 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Aquatic sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30633906
ISBN:	9798380609159

Minimizing the Use of Live Feeds During the Larviculture of Five Ornamental Fish Species.
Murray, Casey.

Minimizing the Use of Live Feeds During the Larviculture of Five Ornamental Fish Species. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 215 p.

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--University of Florida, 2023.

This item must not be sold to any third party vendors.

Larviculture is often the most laborious and sensitive stage within aquaculture due to the specific nutritional and environmental parameters required by larval fish. The complexity of this stage is further increased by the reliance on live feeds, such as copepods, rotifers, and Artemia spp., which induce larval feeding responses via natural movement patterns and are highly digestible for immature larval digestive tracts. However, live feeds are costly due to their own culture requirements, potential as disease vectors, and unreliability of supply. In this dissertation, larval digestive ontogeny was used to transition five species of freshwater and marine ornamental larvae from live feeds to inert microparticulate diets (MD) as early as possible.Histology, histochemistry, and digestive enzyme assays were used to characterize the ontogeny of digestive tract development in blackbanded sunfish (Enneacanthus chaetodon), x-ray tetra (Pristella maxillaris), Siamese fighting fish (Betta splendens), hogfish (Lachnolaimus maximus), and clownfish (Amphiprion ocellaris). The timing of digestive tract maturation for each species was used to design and conduct subsequent dietetics and weaning trials to determine the earliest point at which each species can transition from live feeds to MDs without affecting larval growth, survival, or quality.Of the three freshwater species studied, B. splendens were the most capable of utilizing MDs early in the larval period and were the only species to exhibit survival and growth when fed MD from first feeding. Both E. chaetodon and P. maxillaris exhibited prolonged agastric stages (40 days and 22-24 days, respectively) and were not able to utilize MDs efficiently before digestive tract maturation. Clownfish had the shortest larval period of all species studied (9-11 days) and were able to ingest and digest MDs at 5 days post hatch (DPH), two days prior to digestive tract maturation. Hogfish exhibited a permanent agastric stage but were able to accept MDs as early as 24 DPH without affecting growth, survival, or quality. They also exhibited an oesogaster, a unique organ posterior to the esophagus that potentially functions as a neutral stomach. Together, these results provide more economically feasible larval culture protocols for five commercially relevant ornamental fish species.

ISBN: 9798380609159Subjects--Topical Terms:

3174300
Aquatic sciences.
Subjects--Index Terms:

Aquaculture

Minimizing the Use of Live Feeds During the Larviculture of Five Ornamental Fish Species.
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300 $a 215 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
500 $a Advisor: DiMaggio, Matthew.
502 $a Thesis (Ph.D.)--University of Florida, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Larviculture is often the most laborious and sensitive stage within aquaculture due to the specific nutritional and environmental parameters required by larval fish. The complexity of this stage is further increased by the reliance on live feeds, such as copepods, rotifers, and Artemia spp., which induce larval feeding responses via natural movement patterns and are highly digestible for immature larval digestive tracts. However, live feeds are costly due to their own culture requirements, potential as disease vectors, and unreliability of supply. In this dissertation, larval digestive ontogeny was used to transition five species of freshwater and marine ornamental larvae from live feeds to inert microparticulate diets (MD) as early as possible.Histology, histochemistry, and digestive enzyme assays were used to characterize the ontogeny of digestive tract development in blackbanded sunfish (Enneacanthus chaetodon), x-ray tetra (Pristella maxillaris), Siamese fighting fish (Betta splendens), hogfish (Lachnolaimus maximus), and clownfish (Amphiprion ocellaris). The timing of digestive tract maturation for each species was used to design and conduct subsequent dietetics and weaning trials to determine the earliest point at which each species can transition from live feeds to MDs without affecting larval growth, survival, or quality.Of the three freshwater species studied, B. splendens were the most capable of utilizing MDs early in the larval period and were the only species to exhibit survival and growth when fed MD from first feeding. Both E. chaetodon and P. maxillaris exhibited prolonged agastric stages (40 days and 22-24 days, respectively) and were not able to utilize MDs efficiently before digestive tract maturation. Clownfish had the shortest larval period of all species studied (9-11 days) and were able to ingest and digest MDs at 5 days post hatch (DPH), two days prior to digestive tract maturation. Hogfish exhibited a permanent agastric stage but were able to accept MDs as early as 24 DPH without affecting growth, survival, or quality. They also exhibited an oesogaster, a unique organ posterior to the esophagus that potentially functions as a neutral stomach. Together, these results provide more economically feasible larval culture protocols for five commercially relevant ornamental fish species.
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650 4 $a Aquatic sciences. $3 3174300
650 4 $a Physiology. $3 518431
650 4 $a Limnology. $3 545788
650 4 $a Biochemistry. $3 518028
653 $a Aquaculture
653 $a Digestive enzyme
653 $a Ornamental larvae
653 $a Ornamental fish species
653 $a Freshwater
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690 $a 0719
690 $a 0487
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710 2 $a University of Florida. $b Fisheries and Aquatic Sciences. $3 3175800
773 0 $t Dissertations Abstracts International $g 85-04B.
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793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30633906