Indoor and Deep Sub-Tidal Intermediate Culture ofTrochus niloticusfor Restocking

Autor:	Arlene L. Avillanosa, Benjamin J. Gonzales, Jennifer A. Gill, Roger G. Dolorosa, Alastair Grant
Rok vydání:	2013
Předmět:	education.field_of_study biology Population Trochus Captivity Economic shortage Management Monitoring Policy and Law Aquatic Science biology.organism_classification Substrate (marine biology) Fishery Stocking Trochus niloticus Juvenile education Ecology Evolution Behavior and Systematics
Zdroj:	Reviews in Fisheries Science. 21:414-423
ISSN:	1547-6553 1064-1262
DOI:	10.1080/10641262.2013.800775
Popis:	The high demand for shells of the large reef-associated gastropod Trochus niloticus in the manufacture of mother-of-pearl buttons has resulted in a widespread decline of its population. As a consequence, juvenile mass production and restocking has been practiced as one of the many conservation measures. Trochus has long been successfully bred in captivity, but culturing of juveniles until ready for release is faced with many problems, including the shortage of natural food. Terrestrial plants have traditionally been used by fishermen as food in keeping wild trochus juveniles, but their potential use in intermediate culture of trochus has not been evaluated. We conducted four growth trials for 60–120 days, rearing hatchery-produced juveniles (10–28-mm shell diameter) at different stocking densities in indoor tanks and sea cages, with coconut leaves as the main or an additional substrate. An average growth rate of 4.4 mm mo−1 (95% CL 4.0–4.7 mm mo−1) for all stocking densities was achieved in growth trials ...
Databáze:	OpenAIRE
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