Age, Growth and Mortality of Liza carinata Valenciennes, 1836 (Pisces: Mugilidae) in Bitter Lakes, Suez Canal, Egypt

Abstract

The longevity, growth and mortality parameters of keeled mullet Liza carinata population in the Bitter Lakes, Suez Canal, Egypt were estimated during the period from December 2016 to November 2017. The estimated length-weight relationship for combined sexes (♂♀) was W= 0.0177 L 2.8115. The longevity of this species was estimated to be 4 years. The highest growth rate in length was recorded in the first year of life (66.35 %). Growth for both sexes was described by the von Bertalanffy equation as: L t = 23.5 (1-e-0.42 (t+1.07)) for growth in length; W t = 128 (1-e-0.42 (t+1.07)) 2.8 for growth in weight. Based on these growth parameters, the total mortality (Z) was estimated to be 2.56 y-1. The estimated values for natural mortality (M) and fishing mortality (F) were 0.51 y-1 and 2.05 y-1 respectively. The estimated value of the exploitation rate (E) was 0.8 y-1. All the results refers to that the L. carinata stock in the Bitter Lakes, Suez Canal suffer from high rates of fishing effort exceeding that gives maximum sustainable yield and consequently a depleted stock.

Effect of Age on Growth of Keeled Mullet Fish Liza Carinata (Valenciennes, 1836) in Different Environmental Conditions (Wild And Lab.)

“…mullets to fishery resources in the Suez Bay, no managing rules have been established to protect this valuable resource in the Bay L. carinata represented about 18% of the total catch of the Suez Bay during the last ten years )GAFRD, 2012( recorded by El-Ganainy and El-Boray (1999). The keeled mullet Liza carinata nearby named "Sehlia" is a mugilid species of commercial value for fisheries and aquaculture in Gulf of Suez and Suez Canal sector (Mehanna, 2004 andMehanna et al, 2019). Liza carinata inhabit tropical and warm-temperate bays (Pombo et al, 2005) and well-thought-out as respected food sources and very representative species for rearing in fish farms.…”