Length-weight relationships of fishes from three northern Aegean estuarine systems (Greece)

Length–weight relations of selected species of the family Gerreidae (Actinopterygii: Perciformes) from the Mexican coast

“…According to Koutrakis and Tsikliras (2003), the parameter b varies between 2 and 4, but in the present study it ranged from a minimum of 2.58 for the Black axillary mojarra (Eugerres axillaris) to a maximum of 3.79 for the Irish mojarra (Diapterus auratus). These values can be considered within the expected range for fish (Froese 1998).…”

“…Sample size ranged from 17 for the striped mojarra (Eugerres plumieri) to 1956 for the dark-spot mojarra (Eucinostomus entomelas). All sample sizes (n), minimum and maximum length and weight, parameters of LWR (a and b), 95% confidence limits of b, and the coefficient of determination (r 2 ) by species, are presented in Table 1.According to Koutrakis and Tsikliras (2003), the parameter b varies between 2 and 4, but in the present study it ranged from a minimum of 2.58 for the Black axillary mojarra (Eugerres axillaris) to a maximum of 3.79 for the Irish mojarra (Diapterus auratus). These values can be considered within the expected range for fish (Froese 1998).…”

Editorial Note on Weight–Length Relations of Fishes

“…Based on the slope (b) of the relation between weight and length, one can check whether the growth of a fish species is isometric (b = 3, all fish dimensions increase at the same rate), hypoallometric (b < 3, a fish increases less in weight than predicted by its increase in length, i.e., it becomes more elongated as it grows; also termed negative allometric) or hyperallometric (b > 3, a fish increases more in weight than predicted by its increase in length, i.e., it becomes less elongated or more roundish as it grows; also termed positive allometric). Weight-length relations (WLRs) can be used for converting lengths into biomass, determining fish condition, comparing fish growth among areas, and as a complement to species-specific reproduction and feeding studies (Petrakis and Stergiou 1995, Koutrakis and Tsikliras 2003, Froese 2006. Thus, they are an important component of fisheries biology and when properly calculated they can be very useful to fisheries management.…”

Length-weight relationships for 30 fish species caught in coastal waters of Veracruz, western Gulf of Mexico

“…Furthermore, LWR is useful to calculate fish condition and provides information about life history and morphological comparisons between different fish species or between different fish populations from different habitats (Petrakis & Stergiou 1995, Koutrakis & Tsikliras 2003, Froese 2006). This contribution takes importance because the study area, known as Las Barrancas, is neighbor to the south of Veracruz Coral Reef System National Park, which was decreed as a marine protected area in 1992, and it could be impacted in the short-term by human activities related to port expansion in order to increase capabilities for commercial activities.…”