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Breeding and larval-rearing studies on angelfish / Celeste E. Roderno.

By:

Roderno, Celeste E [author]

Material type: Text

TextLanguage: English Publication details: Indang, Cavite, 2000. Cavite State University- Main Campus,Description: 50p. : ill. ; 28 cm. illustrations ; cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

574 R61 2000

Online resources:

View Abstract

Abstract: RODERNO, CELESTE ESPIRITU. March 2000. Cavite State University, Indang, Cavite, "Breeding and Larval-Rearing Studies on Angelfish (Pterophyllum scalare Heckel)". Adviser: Mr. Francisco M. Heralde III Angelfish (Pterophyllum scalareHeckel) were studied to develop suitable breeding and larval-rearing techniques. Fit, angelfishes were randomly paired for the assessment of bond-pairing, spawning and identification of male and female morphological characteristics. Identified pairs were subjected to two treatments: (1) Lighted and (2) Shaded, to assess the effect of shading on success of spawning and hatching performance. Similarly, six larval-rearing procedures were tested for survivability of recovered hatchlings. Results showed that male and female angelfishes were identified according to the appearance of genital organ, spines on the caudal fin and sexual behaviors. Male fishes were observed to have tiny pointed genital papillae, rough and thicker spine on the caudal fin_ aggressive behavior and nudging behavior to female. Female fishes were observed to have bulging rounded genital organ, smooth and thinner spine and exhibited male avoidance behavior. Shading affected breeding and hatching performance of angelfish through spawning suppression and reduction of hatching rate. Shaded fish (Treatment 2) spawned less than half the frequency of lighted fish (Treatment 1). Hatching, rate of eggs recovered from Treatment 1 was tenfold than those of Treatment 2. Mean number of days for eggs to hatch was shorter in Treatment 2 than in Treatment 1. Rearing treatment procedure 4 (RT-4) with sequential diet of newly-hatched Artemia nauplii, addition of algae-containing water and application of prophylactic dose of antifungal agent resulted in 100% survival of recovered hatchlings up to fingerling stages. Factors like water temperature, pH, feed quality and type of algae were also found to be critical for successful breeding and larval rearing.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	574 R61 2000 (Browse shelf(Opens below))		Link to resource	Room use only	T-2014		00002645

Thesis (BS Biology - - General Biology) Cavite State University.

Includes bibliographical references.

RODERNO, CELESTE ESPIRITU. March 2000. Cavite State University, Indang, Cavite, "Breeding and Larval-Rearing Studies on Angelfish (Pterophyllum scalare Heckel)".

Adviser: Mr. Francisco M. Heralde III

Angelfish (Pterophyllum scalareHeckel) were studied to develop suitable breeding and larval-rearing techniques.

Fit, angelfishes were randomly paired for the assessment of bond-pairing, spawning and identification of male and female morphological characteristics. Identified pairs were subjected to two treatments: (1) Lighted and (2) Shaded, to assess the effect of shading on success of spawning and hatching performance. Similarly, six larval-rearing procedures were tested for survivability of recovered hatchlings. Results showed that male and female angelfishes were identified according to the appearance of genital organ, spines on the caudal fin and sexual behaviors. Male fishes were observed to have tiny pointed genital papillae, rough and thicker spine on the caudal fin_ aggressive behavior and nudging behavior to female. Female fishes were observed to have bulging rounded genital organ, smooth and thinner spine and exhibited male avoidance behavior.

Shading affected breeding and hatching performance of angelfish through spawning suppression and reduction of hatching rate. Shaded fish (Treatment 2) spawned less than half the frequency of lighted fish (Treatment 1). Hatching, rate of eggs recovered from Treatment 1 was tenfold than those of Treatment 2. Mean number of days for eggs to hatch was shorter in Treatment 2 than in Treatment 1.

Rearing treatment procedure 4 (RT-4) with sequential diet of newly-hatched Artemia nauplii, addition of algae-containing water and application of prophylactic dose of antifungal agent resulted in 100% survival of recovered hatchlings up to fingerling stages. Factors like water temperature, pH, feed quality and type of algae were also found to be critical for successful breeding and larval rearing.

Submitted to the University Library 03/27/2000 T-2014