Spawning, Egg Incubation, and Larval Culture of Two Marine Fish, Pinfish, Lagodon Rhomboides, and Pigfish, Orthopristis...

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Material Information

Title:
Spawning, Egg Incubation, and Larval Culture of Two Marine Fish, Pinfish, Lagodon Rhomboides, and Pigfish, Orthopristis Chrysoptera
Physical Description:
1 online resource (143 p.)
Language:
english
Creator:
Broach, Jason S
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Fisheries and Aquatic Sciences, Forest Resources and Conservation
Committee Chair:
OHS,CORTNEY L
Committee Co-Chair:
PETTY,BARBARA D
Committee Members:
HILL,JEFFREY EUGENE
STAPLES,CHARLES R
CRESWELL,ROGER LEROY

Subjects

Subjects / Keywords:
aquaculture -- baitfish -- pigfish -- pinfish
Forest Resources and Conservation -- Dissertations, Academic -- UF
Genre:
Fisheries and Aquatic Sciences thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Marine baitfish aquaculture is still in its infancy, but has the potential to provide a consistent supply of bait to recreational anglers even during seasonal shortages in the wild fishery. The pigfish, Orthopristis chrysoptera,and pinfish, Lagodon rhomboides, are two popular baitfishes used in the southeastern United States. Both have desirable culture attributes including the ability to growout at high density, however, their larval survival to complete metamorphosis is low, typical of other marine fishes. Experiments were conducted to elucidate efficient egg stocking densities and spawning protocols that could help compensate for the inherent low larval survival. Larval experiments with pigfish were also conducted to examine critical variables that could potentially improve larval growth and survival.   Pigfish eggs exhibited high hatching success during static egg incubation at densities up to 1,000 eggs/L. Pinfish eggs were less tolerant to higher densities during static egg incubation, and hatching success declined significantly at densities above 250 eggs/L. Flow-through seawater during egg incubation allowed densities to be increased at least to 1,000and 4,000 eggs/L for pinfish and pigfish, respectively.   Spawning activity of pinfish was not induced at any dosage of channel catfish pituitary extract (CCPE) administered. In contrast, CCPE induced spawning of pigfish at all dosages tested, although 10 or 20 mg/kg yielded higher spawning frequency and egg production. Egg and larval quality of pigfish spawns obtained from CCPE 10 or20 mg/kg doses were only slightly less than that of the control treatment (0.5mL/kg of Ovaprim®). Natural seasonal spawning observed in pigfish revealed that broodfish had the capacity to spawn consistently over a period of 88 days and yielded an absolute fecundity over 560,000 eggs/female. Multiple fatty acids of floating eggs were correlated with hatch success and larval survival.   Results from multiple pigfish larval experiments indicated rotifer enrichment with DHA Protein Selco and green water application using live T-ISO at 500,000 cells/mL were effective for high survival of pigfish during early stages of larval culture. A once daily rotifer feeding regime at a high concentration of 20 rotifers/mL and a stocking density of 50 larvae/L were also beneficial to improve survival.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Jason S Broach.
Thesis:
Thesis (Ph.D.)--University of Florida, 2014.
Local:
Adviser: OHS,CORTNEY L.
Local:
Co-adviser: PETTY,BARBARA D.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2015-05-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2014
System ID:
UFE0046211:00001