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Biometric Relationships of the Pool Barb Puntius sophore (Hamilton 1822) (Cyprinidae) from Three Major Rivers of Bangladesh (Hubungan Biometrik Pool Barb Puntius sophore (Hamilton 1822) (Cyprinidae) daripada Tiga Sungai Utama di Bangladesh)
MD. YEAMIN HOSSAIN1*, MD. MOSADDEQUR RAHMAN2, ELGORBAN M. ABDALLAH3 1Laboratory
of Fisheries Biology, Faculty of Fisheries, Kagoshima University 2Department
of Fisheries, Faculty of Agriculture, University of Rajshahi 3Center
of Excellence of Biotechnology Research, King Saud University
Diserahkan: 8 Februari 2012/Diterima: 29 April 2013
ABSTRACT
The present study describes population structure (length-frequency
distribution-LFD) and biometric relationships including length-weight
relationship (LWR), length-length relationship (LLR),
Fulton’s condition factor (K), relative weight (Wr) and
form factor (a3.0) of Puntius sophore wild
populations from three major rivers of different geographical locations of
Bangladesh. A total of 784 specimens were caught by traditional fishing gear
from March 2010 to February 2011. For each individual, the total length (TL),
fork length (FL) and standard length (SL)
were measured by digital slide calipers. Individual body weight (BW)
was also taken by a digital balance. The results showed significant differences
in TL-frequency distributions among populations (p<0.05),
with larger mean TL size (6.92 ± 1.21 cm) was recorded
from the Rupsha River. The coefficient b of the LWR was
close to the isometric value (b≈3.000) in these rivers of Bangladesh,
although it suggested negative allometric growth in the Padma River (b≈2.900).
The results also indicated that the LWRs were highly correlated (r2>0.921).
Fulton’s condition factor (K) showed significant
variations (p<0.001) among the populations, with best performance by
the Padma River, followed by the Jamuna and Rupsha River; whereas, relative
weight (Wr) was close to 100 for all the
populations, indicating the balance habitat with food availability relative to
the presence of predators. The estimated values of a3.0 were
as 0.0158, 0.0142 and 0.0152 for P. sophore in the Jamuna, Padma and
Rupsha River. These results will be useful for fishery biologists and
conservationists to suggest adequate regulations for sustainable fishery
management and conservation its numerous stocks in the region.
Keywords: Biometric; condition factor; length-weight
relationships; Puntius sophore
ABSTRAK
Kajian ini menerangkan struktur populasi (pengagihan
kekerapan-panjang-LFD) dan hubungan biometrik termasuk
hubungan panjang berat (LWR), hubungan panjang-panjang (LLR),
faktor keadaan Fulton (K), berat relatif (Wr) dan
faktor pembentukan (a3.0) populasi liar Puntius
sophore daripada tiga sungai utama dengan keadaan geografi berbeza di Bangladesh.
Sebanyak 784 spesimen telah ditangkap menggunakan penangkap ikan tradisional
dari bulan Mac 2010 hingga Februari 2011. Untuk setiap individu, panjang total
ikan (TL), panjang cabang (FL)
dan panjang piawai (SL) telah diukur menggunakan angkup
slaid digital. Berat badan (BW) individu telah diukur
dengan menggunakan penimbang digital. Hasil kajian menunjukkan perbezaan yang
bererti (p<0.05) dalam kepelbagaian TL-kekerapan
antara populasi, dengan purata saiz TL (6.92 ± 1.21 cm) direkodkan
dari Sungai Rupsha. Pekali b daripada LWR adalah
hampir kepada nilai isometrik (b≈3.000) di sungai-sungai Bangladesh,
walaupun ianya mencadangkan pertumbuhan negatif ‘allometric’ di Sungai Padma (b≈2.900).
Hasil kajian juga menunjukkan bahawa LWR berbeza mempunyai korelasi
yang amat tinggi (r2>0.921). Faktor keadaan
Fulton’s (K) menunjukkan variasi yang bererti (p<0.001)
antara populasi, dengan prestasi terbaik ditunjukkan oleh Sungai Padma, diikuti
oleh Sungai Jamuna dan Sungai Rupsha; manakala, berat relatif (Wr) didapati menghampiri 100 untuk semua
populasi, menunjukkan kesetaraan habitat dengan kebolehdapatan makanan
berbanding dengan kehadiran pemangsa. Nilai jangkaan a3.0 didapati
adalah 0.0158, 0.0142 dan 0.0152 untuk P. sophore di Sungai Jamuna,
Padma dan Rupsha. Hasil kajian ini amat berguna bagi ahli biologi ikan dan ahli
pemuliharaan untuk mencadangkan peraturan-peraturan yang sesuai bagi tujuan
pengurusan perikanan mapan dan pemuliharaan stok yang pelbagai di rantau ini.
Kata kunci: Biometrik; faktor keadaan; hubungan
panjang berat; Puntius sophore
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*Pengarang untuk surat-menyurat; email: yeamin2222@yahoo.com
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