Life-History Traits of the Climbing perch Anabas testudineus (Bloch, 1792) in a Wetland Ecosystem

[摘要] The freshwater climbing perch, Anabas testudineus (Bloch, 1792), is an economically important, and nutritionally valuable food fish in south Asia. The present study provides the first complete description of life-history traits, i.e., length-frequency distributions (LFDs), length-weight relationships (LWRs), length-length relationship (LLR), condition factors (allometric, KA; Fulton's, KF; relative, KR; relative weight, WR), form factor (a3.0), size at sexual maturity (Lm), and natural mortality (Mw) of A. testudineus in a wetland known as Gajner Beel, Pabna, in northwestern Bangladesh. Sampling was done using different traditional fishing gears during July to December, 2017. Total length (TL) and whole body weight (BW) were measured by the digital slide calipers and an electronic balance with 0.01cm and 0.01 g accuracy, respectively. A total of 239 specimens were measured ranging from 7.40-14.50 cm TL and 7.89- 63.78 g BW during this study. The estimated b values indicated an isometric growth pattern (b=3.00) in A. testudineus. The LWRs were highly significant (p0.956. KF best indicated the well-being of A. testudineus among the four types of condition factors in the Gajner Beel. A Wilcoxon sign-ranked test for WR showed no significant dissimilarity from 100, signifying the balanced habitat for A. testudineus. The estimated a3.0 was 0.021, and Lm was calculated as 8.41 (~8.40) cm TL in the Gajner Beel. The Mw of A. testudineus was 1.05 year-1. The results should benefit the sustainable management of A. testudineus species in Bangladesh and its neighboring countries.

[学科分类] 生物科学（综合）

[关键词] Anabas testudineus;Growth pattern;Conditions;Size at sexual maturity;Natural mortality