<abstract xmlns="http://www.w3.org/1999/xhtml">
The near-threatened <italic>Ailia coila</italic>, commonly referred to as Gangetic ailia, is a catfish species in the Ailiidae family that is indigenous to Bangladesh, Pakistan, Nepal, and India. This study describes the comprehensive explanation of life-history traits of <italic>Ailia coila</italic>, including length-frequency distribution (<italic>LFD</italic>), growth pattern (length-weight relationships, <italic>LWRs</italic> and length-length relationship, <italic>LLR</italic>), form factor (<italic>a</italic><italic>3.0</italic>), condition factors (allometric, <italic>K</italic><italic>A</italic>; Fulton’s, <italic>K</italic><italic>F</italic>; relative, <italic>K</italic><italic>R</italic> and relative weight, <italic>W</italic><italic>R</italic>), size at first sexual maturity (<italic>L</italic><italic>m</italic>), optimum catchable length (<italic>L</italic><italic>opt</italic>) and natural mortality (<italic>M</italic><italic>w</italic>) from the Tetulia River in southern Bangladesh. Additionally, <italic>L</italic><italic>α</italic>, <italic>a</italic><italic>3.0</italic>, <italic>L</italic><italic>m</italic>, <italic>M</italic><italic>w</italic> and <italic>L</italic><italic>opt</italic> from various water bodies worldwide using the existing literature were calculated in this study. A total of 316 samples were randomly collected occasionally using traditional gear for a year from July 2021 to June 2022. With an accuracy of 0.01 cm and 0.01 g, each fish’s total length (TL), standard length (SL), and body weight (BW) were measured. The group from 10.00 to 10.99 cm TL was numerically leading and the <italic>b</italic> values of <italic>LWRs</italic> indicate positive allometric growth. The <italic>a</italic><italic>3.0</italic> was 0.005 and <italic>K</italic><italic>F</italic> was the best for assessing the well-being of <italic>A. coila</italic>. Additionally, <italic>W</italic><italic>R</italic> indicates that the habitat was imbalanced with higher predators. The calculated <italic>L</italic><italic>m</italic>, <italic>L</italic><italic>opt</italic> and <italic>M</italic><italic>w</italic> were 9.19 (~ 9.2 cm TL), 10.7 cm TL and 1.37 year−1 for <italic>A. coila</italic> in the Tetulia River, respectively. These insights are vital for future research and recommending suitable management strategies for <italic>A. coila</italic> in the Tetulia River and neighboring basins.
</abstract>

The near-threatened Ailia coila, commonly referred to as Gangetic ailia, is a catfish species in the Ailiidae family that is indigenous to Bangladesh, Pakistan, Nepal, and India. This study describes the comprehensive explanation of life-history traits of Ailia coila, including length-frequency distribution (LFD), growth pattern (length-weight relationships, LWRs and length-length relationship, LLR), form factor (a3.0), condition factors (allometric, KA; Fulton’s, KF; relative, KR and relative weight, WR), size at first sexual maturity (Lm), optimum catchable length (Lopt) and natural mortality (Mw) from the Tetulia River in southern Bangladesh. Additionally, Lα, a3.0, Lm, Mw and Lopt from various water bodies worldwide using the existing literature were calculated in this study. A total of 316 samples were randomly collected occasionally using traditional gear for a year from July 2021 to June 2022. With an accuracy of 0.01 cm and 0.01 g, each fish’s total length (TL), standard length (SL), and body weight (BW) were measured. The group from 10.00 to 10.99 cm TL was numerically leading and the b values of LWRs indicate positive allometric growth. The a3.0 was 0.005 and KF was the best for assessing the well-being of A. coila. Additionally, WR indicates that the habitat was imbalanced with higher predators. The calculated Lm, Lopt and Mw were 9.19 (~ 9.2 cm TL), 10.7 cm TL and 1.37 year−1 for A. coila in the Tetulia River, respectively. These insights are vital for future research and recommending suitable management strategies for A. coila in the Tetulia River and neighboring basins.

Life History Traits of Gangetic Ailia <italic>Ailia coila</italic> (Hamilton 1822) in the Tetulia River, Southern Bangladesh

Patuakhali Science and Technology University

Department of Big Data Fishery Resource Management, College of Fisheries and Ocean Sciences

Department of Aquaculture, Faculty of Fisheries

Department of Zoology, Rangapara College Sontipur

Croatian Journal of Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Life History Traits of Gangetic Ailia  (Hamilton 1822) in the Tetulia River, Southern Bangladesh

The near-threatened Ailia coila, commonly referred to as Gangetic ailia, is a catfish species in the Ailiidae family that is indigenous to Bangladesh,...

Life History Traits of Gangetic Ailia Ailia coila (Hamilton 1822) in the Tetulia River, Southern Bangladesh

Published Online: Sep 06, 2023

Page range: 115 - 126

Received: Feb 16, 2023

Accepted: Mar 15, 2023

DOI: https://doi.org/10.2478/cjf-2023-0013

Keywords
Growth pattern, Population biology, Natural mortality, Sexual maturity

© 2023 Newton Saha et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Life History Traits of Gangetic Ailia Ailia coila (Hamilton 1822) in the Tetulia River, Southern Bangladesh

Published Online: Sep 06, 2023

Page range: 115 - 126

Received: Feb 16, 2023

Accepted: Mar 15, 2023

DOI: https://doi.org/10.2478/cjf-2023-0013

KeywordsGrowth pattern, Population biology, Natural mortality, Sexual maturity

© 2023 Newton Saha et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Growth pattern, Population biology, Natural mortality, Sexual maturity