Weight-length relationships for 46 fish species of the Portuguese west coast

Abstract

Summary Weight–length (W–L) relationships were estimated for 46 species of fish captured off the western Portuguese coast between April 1994 and September 1995. The best‐represented family was Scyliorhinidae (2677 fishes), followed by Gadidae (1871), Sparidae (1682) and Merlucciidae (1108). The estimates for the parameter b of the W–L relationship (W = aLb) ranged between 2.171 and 3.873, with a median of 3.124. Significant variations in b were found at seasonal level for striped red mullet (Mullus surmuletus), axillary seabream (Pagellus acarne), greater weever (Trachinus draco) and the sardine (Sardina pilchardus), at the regional level for Atlantic mackerel (Scomber scombrus), and between sexes for the small‐spotted dogfish (Scyliorhinus canicula).

Assessment of length-weight relationship and condition factor of periwinkle (Tympanotonus fuscatus, Linnaeus 1758) from okrika estuary, niger-delta area of nigeria.

“…Length-Weight relationship and Condition Factor are important tools in fisheries biology, management and stock assessment to support data about standing stock biomass, their well-being, compare ontogeny of fish population and growth pattern studies of fish from different regions, understand their life cycles and span, construct ecosystem modelling and can be used as index to assess the status of the aquatic environment where the fish live [17,[19][20][21][22][23][24][25][26][27].…”

Penaeus notialis (Pink Shrimps): Length-Weight Relationships and Condition Factor in Lagos Lagoon, South West, Nigeria

“…Length-weight regressions have been used frequently to estimate weight from length because direct weight measurements can be time-consuming in the field (Sinovcic et al, 2004). One of the most commonly used analyses of fisheries data is length-weight relationship (Mendes et al, 2004). Although various studies have been carried out regarding Pink shrimps, there is a dearth and paucity of information on Length-weight relationships of this shellfish from this part of the Country.…”

Use of Factor Scores for Predicting Body Weight from Some Morphometric Measurements of Two Fish Species in Nigeria

“…Experiments related to animal science are often conducted to develop a model to represent and explain the relationships between variables. Published reports on the relationship between body weight and morphometric measurements of fish are important for the studies on biology, population dynamics and management of species (Ismen, 2002;Mendes et al, 2004;Fafioye & Oluajo, 2005).…”