Analysis Model of Giant Prawns Population (Macrobrachium rosenbergii) in Estuary Edge of Sembakung Waters, Nunukan, Indonesia

Abstract

HighlightThe sex ratio of giant prawns in the waters of fe- male groceries is 3 times higher than that of males.The growth characteristic of male and female giant prawns is negative allometry, but the male and female body shapes are fat.Total mortality, capture mortality, catch rate, male prawns are higher than females.The male infinitive growth is longer than the female,but the female’s growth rate is faster than male.AbstractGiant prawns (Macrobrachium rosenbergii) is a crustacean class that has the larg- est size and its habitat in Sembakung waters included brackish water (estuarine) with a salinity variable of 6.5+0.5 ppt and a temperature variable of 28.5+0.5OC and a variable pH of 6 (acidic). The objective of this research was to analyze the growth and mortality model of giant prawns (M. rosenbergii) that was taken from the catch of fisherman in the estuary, Sembakung sub-district, Nunukan Regency, Indonesia. The study was conducted for 3 months from November 2019 to Janu- ary 2020. The sampling was by using a survey method with purposive judgment sampling based on a catch of 14 fishermen who used the bottom fish pot from Sembakung waters, Nunukan Regency (Indonesia). The data collection included data of sex, total length, and the total weight of giant prawns. While analysis was employed for growth pattern, condition index, Von Bertalanffy growth, and mor- tality. The results obtain the sex ratio of male and female giant prawns 1:3.67. The growth pattern of male and female giant prawns were allometric negative. The growth of the von Bertalanffy model for infinitive growth of male giant prawns were 21.219 cm and female were 18.42 cm, respectively the mortality from giant prawns obtain total male mortality is 2,257, catch mortality is 1.92 and natural mortality is 33.75% with an exploitation rate of 0.85 (85%). The total female mor- tality is 1.528, catch mortality is 120.1% and natural mortality is 32.69% with an exploitation rate of 0.786 (78.6%).

Growth and mortality model of Chacunda gizzard shad Anodontostoma chacunda (Bleeker, 1852) in Tarakan waters, North Kalimantan, Indonesia

“…According to Salim et al (2022) and (Indarjo et al 2021;2023a), in determining the growth model parameters using total length data, total weight, and sex with a total of 789 individuals, consisting of 463 males and 326 females. Variable mortality model in A. chacunda fish using natural mortality model variables, fishing mortality model, total mortality model, and exploitation rate model according to Salim et al (2022) and Indarjo et al (2020b;. The mortality model used is a continuation of Von Bertalanffy model with the addition of water environmental temperature measurement from A. chacunda which is 28.6°C.…”

Length-weight relationship, sex ratio, mortality and growth condition of natural stock of Macrobrachium rosenbergii from the estuarine systems of North Kalimantan, Indonesia

“…This is not surprising observation as New Kutty ( 2010) had reported that the proportion of female M. rosenbergii is commonly higher than male. The published proportion of female to male of M. rosenbergii in Indonesia ranged from 1.88 times (Sofian and Sari 2018) to 3.67 times (Indarjo et al 2020e).…”

“…Estuarine ecosystems of Indonesia are rich in biodiversity (Suwartiningsih et al 2017). Many of these biodiversities are exploited for economic development including giant prawns (Indarjo et al 2020e). The giant prawns (Macrobrachium rosenbergii) are commercially important species and are highly exploited due to their large size (Khasani 2008) and high nutrition contents (Nandlal and Pickering 2005).…”

“…Sofian dan Sari (2018) suggested that the abundance of giant prawns can be affected by excessive exploitation of the resource. Indarjo et al (2020e) also explained that high market demand of the giant prawn has increased fishing intensity using different gears. Such activity could alter size distribution, condition factor, and the overall population health of the species.…”

The Effectiveness of selective breeding on the productivity of giant freshwater prawns (Macrobrachium rosenbergii) population

“…This is evidenced by the existence of centres for the cultivation of giant freshwater prawns, among others, in the district of Sleman, the Special Region of Yogyakarta, the provinces of West of Java, East of Java, Centre Java, South of Kalimantan, West Kalimantan, Banten, Aceh, island of Bali [1]. Giant freshwater prawns have a comparative advantage as a centre for geographic distribution and potential ecosystem diversity in cultivation [2,3]. Potential lands for the cultivation of giant freshwater prawns include ponds, rice fields, ponds field, and freshwater ponds.…”