In:
Acta Ichthyologica et Piscatoria, Pensoft Publishers, Vol. 51, No. 1 ( 2021-03-31), p. 29-36
Abstract:
Effective fisheries management depend on having an exact assessment of biological parameters, including growth parameters, reproduction, size at sexual maturity ( L m ), and stock assessment. The purpose of this research was to estimate the size at sexual maturity ( L m ) for 20 fish species belongs to 14 families from a wetland (Gajner Beel ) ecosystem in the north-western (NW) Bangladesh through multi-models such as length ( L max ) based empirical model, gonadosomatic index (GSI)-based model, and logistic model using commercial catches from January to December 2018. Also, we assessed the L m in other water-bodies worldwide. Specimens’ total length (TL) was noted up to 0.1 cm using measuring board body weight (BW) and gonad weight (GW) weighed by digital electronic balance with 0.01 g accuracy. To assess the L m , maximum body length ( L max ) based empirical model; the relation between TL (total length in cm) vs. GSI (gonadosomatic index in %); and a logistic model were considered. The minimum L m was 4.64, 3.90, and 4.15 cm for Chanda nama Hamilton, 1822 and the maximum was 25.33, 24.50, and 24.70 cm for Channa striata (Bloch, 1793) through L max , GSI, and logistic-based models, respectively. From these three models, the minimum mean L m was 4.23 cm for C. nama and the maximum was 24.84 cm for C. striata . The L m with 50.0% species was in 8.80 cm TL. We also calculated the L m from different bodies of water based on L max . This study was generated data of 17 new L m among 20 species, which are globally absent. Therefore, the study will help develop sustainable management strategies, conservation through the implementation of mesh size based on the size at sexual maturity ( L m ).
Type of Medium:
Online Resource
ISSN:
1734-1515
,
0137-1592
DOI:
10.3897/aiep.51.63339
DOI:
10.3897/aiep.51.63339.figure1
DOI:
10.3897/aiep.51.63339.figure2
DOI:
10.3897/aiep.51.63339.figure3
Language:
Unknown
Publisher:
Pensoft Publishers
Publication Date:
2021
detail.hit.zdb_id:
441372-6
detail.hit.zdb_id:
2177242-3
SSG:
21,3
SSG:
12
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