The Reproductive Aspect of Tropical Abalone (Haliotis asinina L.) in the Waters of Tanakeke Islands at South Sulawesi

Abstract

The objective of research was to analyze the reproductive aspect of abalone (Haliotis asinina L.) which included the beginning of gonad maturity, the peak of spawning season, the comparison of male and female abalone caught in the nature, the reproductive potential, and abalone fecundity. Research was located at the waters of Tanakeke Islands, Takalar District, South Sulawesi. Method of research was field survey. Sampling stations were determined Aquatic Science and Technology ISSN 2168-9148 2013 www.macrothink.org/ast 31 based on the distribution of coral reef in the islands. Result of research indicated that male abalone reached the beginning of gonad maturity at shell length of 64.50 mm, while female abalone reached it at shell length of 64.09 mm. Abalone had spawned throughout year with two peaks of spawning season, precisely at the beginning of dry season and rainy season. The comparison of male and female abalone primes was 1:1. Abalone group with shell length of 60-70 mm contributed more than 70 % to the total reproductive potential of the population. Total fecundity of the tropical abalone at research was ranging from 255,900 to 756,200 eggs.

Histological Validation of Morphochromatically-Defined Gonadal Maturation Stages of Green Abalone (Haliotis fulgens) Philippi,1845 and Pink Abalone (Haliotis corrugata) Wood, 1828

“…The position of the gonad within the hepatogonadal complex allows its color to be distinguished from outside, thus making it possible to determine the sex of the specimen examined (beige or cream in males, green in females) (Boolootian et al, 1962;Cox;Martin et al;Sobhon et al, 1999;Singhakaew et al, 2003;Garcia-Esquivel 2007;Roux et al, 2013;Hadijah et al, 2013) without dissecting it; sometimes it is also possible to infer its maturity stage based on gonad firmness and size.…”

The Influence of Substrate to Larval Settlement of the Tropical Abalone (Haliotis asinina)

“…Environmental factor (Hadijah, et al, 2013), feed type and feed size (Gullardo andBuen, 2003: Setyono, 2007) are determinant factors for abalone seeding success rate.…”

“…Environmental factor (Baldwin et al, 2007 andHadijah et al, 2013), feed type and size diversity (Chen and Chen, 2000) belong to determinant factors of abalone survival rate. At larval stage, substrate difference will affect growth rate (Bautista, 2003).…”