LENGTH- WEIGHT RELATIONSHIP (LWR) AND CONDITION FACTOR OF Amblyceps apangi NATH & DEY FROM ARUNACHAL PRADESH, INDIA

Abstract

Abstract:Length-weight relationship of Amblyceps apangi had been carried out from streams of Dikrong River Arunachal Pradesh, during January 2014 to December 2015. The co-efficient of regression (b) was recorded as 2.213 (males); 2.376 (females); 2.312 in pooled (both sexes). The result reveals that females have better growth than males and both sexes signify a negative allometric growth pattern. The highest Condition factor 'K' value (0.82 ±0.24) for male was found in November and minimum (0.45 ± 0.12) was observed in July. In case of female, the highest value (0.95 ± 0.11) was recorded in November and lowest (0.50 ± 0.09) was noticed in June. Again, the highest K values (0.83 ± 0.16) of male was found in 61-70 mm while in females the highest (0.86 ± 0.13) was in 51-60 mm. The lowest values for both male (0.38 ± 0.07) and female (0.36 ± 0.03) were observed in 141-150 mm. The Relative Condition factor (Kn) value did not show any variation with respect to monthly and size grouping. The result indicates that both the sex was found in a good condition. Moreover, the K values were encountered with GSI values during the quiescent and degenerative phases of the reproductive cycle but minimum K values coincides with the increased GSI during the recrudescent phases both the sexes. Coefficient of correlation (r) shows more or less similar trend in all male, female and pooled. The correlation coefficient 'r' was found to be 0.906 (males); 0.949 (females) and 0.934 (pooled). This result indicates that there was a good correlation between length and weight of the fish.

Growth, Mortality and Exploitation Levels of Sphyraena sphyraena (Pisces: Sphyraenidae) and Apsilus fuscus (Pisces: Lutjanidae) in Ghanaian Waters

“…The results of the present study affirms the general rule that, the highest values of the condition factor occur in the smallest size groups [45]. Again, report by [46] indicates that K values are higher in small fishes and lower in fish having large size due to voracious feeding nature of juvenile fishes. The results of condition factor can be used to deduce the wellbeing of the fish species studied and it is based on the theory that heavier fish of a given length are in better condition [43] and therefore, used as an index of growth and feeding intensity [47].…”

HUBUNGAN PANJANG-BOBOT DAN FAKTOR KONDISI IKAN NILEM (Osteochilus vittatus VALENCIENNES, 1842) DI PERAIRAN WADUK BENANGA, KALIMANTAN TIMUR

“…Nilai faktor kondisi ikan dapat berbeda terkait dengan spesies, ketersedian sumber makanan, jenis kelamin, usia dan tingkat kematangan gonad (Anibeze, 2000). Faktor kondisi biasanya dinyatakan sebagai "koefisien kondisi" dilambangkan dengan 'K', berguna sebagai alat untuk mendiagnosis kondisi fisiologis ikan dalam interaksinya dengan faktor biotik dan abiotik, selain itu juga dapat digunakan untuk memantau intensitas pakan, usia, dan tingkat pertumbuhan ikan (Ujjania et al, 2012;Kachari, 2017).…”

New Localities and Length-Weight Relationship for Alburnus caeruleus in the Euphrates and Tigris River Basins (Turkey)

“…417-3.908). Although the growth of a fish is species-specific, it can vary depending on factors such as size range (more small or large specimens) and environment in which they live (Bagenal & Tesch, 1978;Froese, 2006;Kachari, Abujam, & Das, 2017). Valikhani et al (2020) studied the length-weight relationship of A. caeruleus living in the shallow littoral waters of the Shadegan Wetland (Iran) and reported a negative allometric growth (b=2.84±0.15).…”