Reproductive Biology of the Sulu Shrimp Metapenaeus suluensis Racek and Dall 1965 (Crustacea, Malacostraca: Penaeidae) in Iloilo River, West Central Philippines

DATO-ON-SUBONG, KATHLEEN; Norte-Campos, A.G.C. Del

doi:10.33997/j.afs.2015.28.3.001

Cited by 1 publication

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“…In our study, the spawning season of M. lamarrei significantly coincided with rainfall, indicating a growing trend in the occurrence of ovigerous females with heavy rainfall. High rainfall leads to nutrient enrichment of the habitat by providing increased organic matter from direct surface flow and creating favorable conditions for growth and development of early larval stages (Dato-On-Subong and del Norte-Campos, 2015;Paschoal et al, 2016).…”

Section: Growth Patternmentioning

confidence: 99%

Spawning season, recruitment, and growth of the freshwater prawn Macrobrachium lamarrei (H. Milne-Edwards, 1837) in a perennial wetland, northeastern Bangladesh

et al. 2021

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Spawning season, recruitment, and growth of the freshwater prawn Macrobrachium lamarrei were studied in a perennial wetland, northeastern Bangladesh during October 2016 to September 2017. Spawning season was estimated based on the monthly variations of percent ovigerous females. Recruitment and growth were estimated using the time series of the lengthfrequency distributions. We compared the von Bertalanffy growth function (VBGF) and the Pauly and Gaschütz growth function (PGGF) to identify any seasonal oscillation in growth rate. Ovigerous females occurred almost throughout the year, indicating a prolonged spawning season with two peaks between March-April (minor peak) and June-September (major peak). Both males and females with modal size ~ 8.0 mm carapace length first recruited in October, which synchronized with the major peak spawning season. There was seasonality in growth rate; hence, PGGF was adopted as the best-fitting model to describe the growth of both sexes. The estimated equations were L t = 17.86 (1-exp [-2.432 (t/ 12 -0.072) -(1.766/2π) sin {2π (t/ 12 -0.982)}] for males and L t = 23.18 (1-exp [-1.342 (t/ 12 + 0.106) -(0.388/2π) sin {2π (t/ 12 -0.209)}] for females. Sexual dimorphism was found with larger size in females than males. Longevity was estimated to be ~ 14 months for both sexes. These findings can be useful to formulate management measures for this prawn.

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Section: Growth Patternmentioning

confidence: 99%