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Seasonal Variations of Growth Pattern and Condition of Paradise threadfin <i>Polynemus paradiseus </i> (Polynemidae) from Tetulia River in Southern Bangladesh

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Title Seasonal Variations of Growth Pattern and Condition of Paradise threadfin Polynemus paradiseus (Polynemidae) from Tetulia River in Southern Bangladesh
 
Creator Hossen, Md. Alomgir
Hossain, Md. Yeamin
Ali, Mir Mohammad
Pramanik, Md. Nasir Uddin
Nawer, Fairuz
Islam, Md. Ariful
Hossain, Md. Akhtar
Bahkali, Ali H.
Elgorban, Abdallah M.
 
Subject Polynemus paradiseus
Growth
Condition
Relative weight
Tetulia River
Bangladesh
 
Description 582-590
A total of 900 individuals (pre-monsoon = 250, monsoon = 350, post-monsoon = 300) of P. paradiseus were collected from the fishers catches during January to December 2014. For each individual, TL (total length) and BW (body weight) were measured with 0.1 cm and 0.1 g accuracy, respectively. Length weight relationship (LWR) was estimated by the equation, W = a × Lb. Length-frequency distributions (LFD) were significantly different between the seasons (P < 0.001). Allometric coefficient (b values) of LWRs (TL vs. BW) indicated isometric growth in pre-monsoon and post-monsoon (b ≈ 3), but negative allometric growth was found in monsoon (b < 3). All LWRs were highly significant (P < 0.001) with all r2 values ≥ 0.984. The LWRs were significantly difference between the seasons (ANCOVA, P < 0.001). The KF is highly correlated with TL (Spearman rank test, P < 0.001) in all the seasons, thus suggesting the best condition factor for assessing the wellbeing of this fish in our study area. Additionally, the WR was significantly different from 100 (Wilcoxon rank test, P = 0.003) in pre-monsoon, which indicates the habitat was in poor condition for P. paradiseus, nevertheless it was not significantly differed in monsoon (P = 0.0186) and post-monsoon (P = 0.423). The calculated Lm was 12.1 cm in TL and form factor was 0.0061 for P. paradiseus in the Tetulia River.
 
Date 2017-03-17T05:35:40Z
2017-03-17T05:35:40Z
2017-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/40800
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.46(03) [March 2017]