Effects of different salinity on survival rate of Marble goby (Oxyeleotris marmoratus) larvae

Ooi, Pei Theng (2004) Effects of different salinity on survival rate of Marble goby (Oxyeleotris marmoratus) larvae. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Natural spawning of brood fish marble goby (Oxyeleotris marmoralus) was carried out in 960-liter square glass aquarium and 48 - 72 hours after spawning larvae were then collected. Survivals of ten larvae in different salinities were determined at salinities from 0 to 10 (in 2 ppt increments) for 11 days in preliminary trial. Indication obtained when larvae in 10 ppt achieve greatest survival and health. Two experiments with higher salinity were then done; from 0 to 28 ppt (0,10,20 and 28 ppt); and 0 to 25 ppt (0,10,20 and 25 ppt) in 40 days. One hundred larvae were used in 9-liter plastic aquarium with aeration supplied. Desired salinities were increased 5 ppt within 1 hour. Water renewal, survival rate and larval observation were conducted daily. Analysis of data revealed that only survival in 10 ppt treatment was significant different between salinities (P<0.6 in experiment 1 and P<0.3 in experiment II). No larvae could survive more than 12 days after spawning in freshwater (0 ppt). Highest survival was achieved in 10 ppt. In 10 ppt treatment, the greatest survival was obtained in one of the triplication with 33% of survival rate (11% in mean) in experiment 1; and 48% of survival rate (22.67% in mean) in experiment 2. O.marmoratus larvae were able to survive and grow at salinities ranging from 10 to 25 ppt. Analysis found no significant different (P>0.05) in the growth rate for all treatments. The mortality occurred in the early larval stages 3-7 days after spawning were much higher than those in the larval stages.

Item Type: Academic Exercise
Uncontrolled Keywords: Fish, Marble goby, Oxyeleotris marmoratus, Spawning larvae
Subjects: ?? SH151-179 ??
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 19 Jan 2012 05:20
Last Modified: 23 Oct 2017 00:55
URI: http://eprints.ums.edu.my/id/eprint/3362

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