Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang

Asian seabass (Lates calcarifer) is a very important target fish for fisherman because it enjoys very high consumer preference and market price. Presently, the total capture production of this fish is decreasing rapidly in Malaysia due to decreasing wild stock. However, necessary information about A...

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Main Authors:	Rahman, Mohammad Mustafizur, Samad, Amira Farzana, Yunus, Kamaruzzaman
Format:	Conference or Workshop Item
Language:	English
Published:	2014
Subjects:	SH Aquaculture. Fisheries. Angling
Online Access:	http://irep.iium.edu.my/37064/ http://irep.iium.edu.my/37064/1/MM_Rahman_2014-procedings.pdf

id	iium-37064
recordtype	eprints
spelling	iium-370642014-11-27T02:21:44Z http://irep.iium.edu.my/37064/ Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang Rahman, Mohammad Mustafizur Samad, Amira Farzana Yunus, Kamaruzzaman SH Aquaculture. Fisheries. Angling Asian seabass (Lates calcarifer) is a very important target fish for fisherman because it enjoys very high consumer preference and market price. Presently, the total capture production of this fish is decreasing rapidly in Malaysia due to decreasing wild stock. However, necessary information about Asian seabass population in Pahang coastal water is lacking for the proper management of this fish. Therefore, a study was conducted to understand some basic characteristics (growth, condition factor and spawning) of Asian seabass population in Pahang coastal water. Fish samples were collected from different region of Pahang for a period of one year. The growth coefficient was calculated by regression analysis using the logarithmic transformed equation logW = loga + b.logL derived from W = a.Lb (where, W = body weight; L = total length). The condition factor (K) was calculated for each individual fish according to the formula K = (W/L3) * 100. The gonadosomatic index (GSI) was calculated using the formula, GSI (%) = (GW/W) * 100 (where, GW = gonad weight). The results showed that the growth coefficient varied from 1.6034 (end of July) and 3.4264 (November). Negative allometric growth was observed in Asian seabass in all samplings except in November and in the middle of July. An isometric growth of Asian seabass was observed in the middle of July (W = 0.0139L2.9962, R2 = 0.9979, P<0.01) and a positive allometric growth was observed in November (W = 0.002L3.4264, R2 = 0.9974, P<0.05). The condition factor of Asian seabass ranged from 1.195 to 1.505. The significantly lowest mean condition factor was found in the November and the highest was observed in the August. Overall high value of condition factor was observed in smaller fish (less than 46 cm total length) while low value of condition factor was observed in medium size fish (56-70 cm total length). The lowest gonadosomatic index of Asian seabass was observed in October and November. Overall gonadosomatic index of Asian seabass was higher from May to August with a very few exception. Based on this study, the spawning season of Asian seabass in Pahang coastal water might be from May to August but more research is needed to confirm this. The information of this study would be used for both applied and basic use for the management of wild Asian seabass stock in the coastal water of Pahang. 2014 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/37064/1/MM_Rahman_2014-procedings.pdf Rahman, Mohammad Mustafizur and Samad, Amira Farzana and Yunus, Kamaruzzaman (2014) Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang. In: International Conference on Oceanography and Sustainable Marine Production: A Challenge of Managing Marine Resources in a Changing Climate (ICOSMaP), 28-30 October 2013, Kuantan, Malaysia.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	SH Aquaculture. Fisheries. Angling
spellingShingle	SH Aquaculture. Fisheries. Angling Rahman, Mohammad Mustafizur Samad, Amira Farzana Yunus, Kamaruzzaman Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
description	Asian seabass (Lates calcarifer) is a very important target fish for fisherman because it enjoys very high consumer preference and market price. Presently, the total capture production of this fish is decreasing rapidly in Malaysia due to decreasing wild stock. However, necessary information about Asian seabass population in Pahang coastal water is lacking for the proper management of this fish. Therefore, a study was conducted to understand some basic characteristics (growth, condition factor and spawning) of Asian seabass population in Pahang coastal water. Fish samples were collected from different region of Pahang for a period of one year. The growth coefficient was calculated by regression analysis using the logarithmic transformed equation logW = loga + b.logL derived from W = a.Lb (where, W = body weight; L = total length). The condition factor (K) was calculated for each individual fish according to the formula K = (W/L3) * 100. The gonadosomatic index (GSI) was calculated using the formula, GSI (%) = (GW/W) * 100 (where, GW = gonad weight). The results showed that the growth coefficient varied from 1.6034 (end of July) and 3.4264 (November). Negative allometric growth was observed in Asian seabass in all samplings except in November and in the middle of July. An isometric growth of Asian seabass was observed in the middle of July (W = 0.0139L2.9962, R2 = 0.9979, P<0.01) and a positive allometric growth was observed in November (W = 0.002L3.4264, R2 = 0.9974, P<0.05). The condition factor of Asian seabass ranged from 1.195 to 1.505. The significantly lowest mean condition factor was found in the November and the highest was observed in the August. Overall high value of condition factor was observed in smaller fish (less than 46 cm total length) while low value of condition factor was observed in medium size fish (56-70 cm total length). The lowest gonadosomatic index of Asian seabass was observed in October and November. Overall gonadosomatic index of Asian seabass was higher from May to August with a very few exception. Based on this study, the spawning season of Asian seabass in Pahang coastal water might be from May to August but more research is needed to confirm this. The information of this study would be used for both applied and basic use for the management of wild Asian seabass stock in the coastal water of Pahang.
format	Conference or Workshop Item
author	Rahman, Mohammad Mustafizur Samad, Amira Farzana Yunus, Kamaruzzaman
author_facet	Rahman, Mohammad Mustafizur Samad, Amira Farzana Yunus, Kamaruzzaman
author_sort	Rahman, Mohammad Mustafizur
title	Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
title_short	Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
title_full	Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
title_fullStr	Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
title_full_unstemmed	Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang
title_sort	growth, condition factor and gonadosomatic index of asian seabass (lates calcarifer) in the coastal water of pahang
publishDate	2014
url	http://irep.iium.edu.my/37064/ http://irep.iium.edu.my/37064/1/MM_Rahman_2014-procedings.pdf
first_indexed	2018-09-07T05:50:37Z
last_indexed	2018-09-07T05:50:37Z
_version_	1610926719259115520

Growth, condition factor and gonadosomatic index of Asian Seabass (Lates calcarifer) in the coastal water of Pahang

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