Short Communication: Growth and mortality rate of Black Pomfret Parastromateus niger (Bloch, 1795) and Silver Pomfret Pampus argenteus (Euphrasen, 1788) in Paloh Waters, West Kalimantan, Indonesia

Abstract

Damora A, Ariyogagautama D, Wahju RI, Susanto H, Wang J. 2018. Short Communication: Growth and mortality rate of Black Pomfret Parastromateus niger (Bloch, 1795) and Silver Pomfret Pampus argenteus (Euphrasen, 1788) in Paloh Waters, West Kalimantan, Indonesia. Biodiversitas 19: 2247-2251. Three species of pomfret fish were caught in Paloh waters including Parastromateus niger, Pampus argenteus, and Pampus chinensis. P. niger and P. argenteus which were more dominant than P. Chinensis. Pomfret fishing in the Paloh waters is not carried out throughout the year, but generally only in August to October every year. The main fishing gear used was drift gill net. Data on the growth parameter and mortality of the pomfret fish is required as an effort for the management of this fish. This study was aimed to estimate the growth and mortality rate of P. niger and P. argenteus in Paloh waters, located in West Kalimantan. This study was conducted from April 2014 to June 2017. The fish samples were collected by catching the fish using drift gill net used by the fishing vessels. The data were analyzed using an analytic model and run using ELEFAN 1 software and Length-converted Catch Curve on FISAT II software. The result showed that von Bertalanffy growth parameters covering growth curvature (k), asymptotic length (L∞), and the age of fish in length zero (t0) was 0.26 year-1, 46.2 cm TL and -1.85 years for P. niger and 0.53 year-1, 46.2 cm TL and -0.88 years for P. argenteus. The von Bertalanffy growth function for P. niger as Lt = 46.2[1-e-0.26 (t+1.85)] and for P. argenteus as Lt = 46.2[1-e-0.53 (t+0.88)]. These functions described the expected or average length at a time (age). Total mortality rate (Z), natural mortality rate (M) and fishing mortality (F) were 0.93 year-1, 0.29 year-1 and 0.64 year-1 for P. niger and 1.68 year-1, 0.47 year-1 and 1.21 year-1 for P. argenteus. Exploitation rate (E) was 0.68 year-1 for P. niger and 0.72 year-1 for P. argenteus. The growth of P. niger is slower than the growth of P. argenteus and the fishing mortality of P. argenteus is higher than P. niger’s. Both of the exploitation rates indicated that the fish resources are over-exploited.

Estimation of population structure, growth and condition of Parastromateus niger in the Bay of Bengal

“…Another study found the value of TL as 30.9 cm from the Bay of Bengal (Cox's Bazar) which was lower than our finding (Akhter et al 2020). This maximum length (38 cm) was also smaller than the fish of 56.2 cm caught from the Persian Gulf (Sahraei et al 2018) and 45 cm from the Indonesian coast (Damora et al 2018). The information on maximum length can be used to estimate the population parameters of fish species (Hossain 2010).…”

Reducing sea turtle bycatch with net illumination in an Indonesian small-scale coastal gillnet fishery

“…The number of net panels set each night varied slightly for each gillnet with the total net length ranging from 1.17 km to 1.38 km. Following the standard practice of this fishery, nets were deployed during late afternoon, soaked overnight, and retrieved by hand during early morning (Damora et al, 2018).…”

“…vessel size, location, time of setting and hauling, net length), and catch information). The primary target species in this fishery included the pomfret species Pampus chinensis, Pampus argenteus, and Parastromateus niger (Damora et al, 2018). The fishery also captured several commercially valuable non-target species, which included Lutjanus griseus, Caranx sexfasciatus, Arius thalassinus, Chinocentrus dorab, Myliobatis tobijei, Himantura gerrardi Gymnura poecilura, Eletheronema tetradactylum, Chorinemus tala, and Scomberomorus commersonii, that were retained and sold (Damora et al, 2018).…”

“…The primary target species in this fishery included the pomfret species Pampus chinensis, Pampus argenteus, and Parastromateus niger (Damora et al, 2018). The fishery also captured several commercially valuable non-target species, which included Lutjanus griseus, Caranx sexfasciatus, Arius thalassinus, Chinocentrus dorab, Myliobatis tobijei, Himantura gerrardi Gymnura poecilura, Eletheronema tetradactylum, Chorinemus tala, and Scomberomorus commersonii, that were retained and sold (Damora et al, 2018). When possible, observers followed the catch to the fish buyers and noted the market value of the total catch, the target catch, and the commercially valuable, non-target catch.…”