Length-weight relationships and length at first maturity for fish species in the upper Miranda River, southern Pantanal wetland, Brazil

Abstract

Length-weight relationships (LWR) were estimated for 17 species and total length at first maturity (L50) for three species of freshwater fishes from the Miranda River, southern Pantanal, Brazil. The b values were compared for some species in the Paraguay River basin with the northern (Cuiaba´River) part of the basin; differences in length-weight relationships were significantly different for Pseudoplatystoma corruscans, P. reticulatum (syn. P. fasciatum). First references on L50 and LWR are presented for two and eight fish species, respectively, as well as the new maximum total length for two species.

Length-weight relationships of four small indigenous fish species from an inland artisanal fishery, Bangladesh

“…The regression parameter b of LWRs for each reported species was found within the expected normal range of 2.5 < b < 3.5, as compared to the Bayesian LWRs predictions approach in FishBase (Froese, 2006). For T. lalius (b = 3.17), N. meni (b = 3.38) and L. annandalei (b = 3.27), b > 3 indicates that these three species grow more in weight than in length; whereas for B. Dario (b = 2.87), b < 3 indicates that this species shared more energy to axial growth than to biomass, and helps them to escape predators and to search for food (Liu, Ye, & Li, 2016;Vicentin, dos S Costa, & Súarez, 2012). However, scientific findings revealed that the b value of the same species may vary by a number of factors, including seasonality, selectivity of the gear, habitat, gonadal maturity, sex, stomach fullness, diet, health and environmental conditions (Chaklader, Siddik, & Nahar, 2015;Froese, 2006;Siddik, Hanif, Chaklader, Nahar, & Fotedar, 2016).…”

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“…The regression constant (b) values lie between the ranges of (2.204 to 3.375). Fish with b value less than 3consumed more of its energy in axial growth rather than weight [5]. Mystus gulio, Lates calcarifer, Acanthopagrus latus, Brachirus orientalis and Mugil cephalus showed negative allometry in Narreri lagoon.…”

Variation over Time of Length–Weight Relationships and Condition Factors for Four Exotic Fish Species from a Restored Shallow Lake in NE Iberian Peninsula

“…The analysis of length-weight relationships (LWRs) and condition factors are common tools in studies of fish biology, ecology, and physiology, and they have been extensively used in fishery research and management [1][2][3][4]. LWRs enable the picturing of a specific population, irrespective of individual variation giving an idea of the condition [5] and fitness of the population [4].…”