Size Distribution and Length-Weight Relationship of Red Snapper (<i>Lutjanus malabaricus</i>) in Pinrang Waters Regency of Pinrang

Abstract

Fisheries activities red snapper in Pinrang waters is considered to be a small scale and caught with that variety of types instrument catch fish (multi gears) one of them is bubu fishing gear. Now, the level of the utilization of red snapper is believed to have been experience symptoms of over fishing due to the high pressure in the area. The study aims to analyze the size structure and length-weight correlation of red snapper (Lutjanus sp). The study was conducted during 5 months of period, starting from March to July 2019 in Pinrang waters, Pinrang District. The sample of the fish obtained by fishermen using ‘Bubu’ fishing gear. The results showed that the total length structure of males and females of the red snapper was ranging from 32 - 57 cm, while the weight structure of males and females of the red snapper had a wide range from 500 to 2500 grams. The total sample of the red snapper is 163 divided into 68 males and 95 females. The growth pattern of red snapper can be categorized in a negative allometric type with a value of b = 2.3328 which means that the length increased faster than the weight gain.

Life-history traits variation of Lutjanus malabaricus (Bloch & Schneider, 1801) in the waters off Northern Vietnam

“…It was found that the stock of Malabar blood snapper in Nghe An and Ha Tinh provinces is in a sex-balanced condition (i.e. the amount of males is equal to the amount of females) during the whole year, which is in agreement with observations performed in Pinrang waters (Rapi et al ., 2020). Even though a statistically significant prevalence of males was observed in June, we tend to assume that it was an artefact of sampling.…”

“…Such a sex ratio is not typical for snapper stocks; usually, they are characterized by a clear predomination of one sex (Shimose and Tachihara, 2005; Fry et al ., 2009). Although these findings also could be due to sampling artefacts, because in cases when the sample size exceeded 100 individuals and specialized fishing gear was used, the sex ratio of L. malabaricus was close to 1:1 (Fry et al ., 2009; Rapi et al ., 2020).…”

“…It is an important market species throughout a significant part of its range and a major recreational and commercial species in northern Australia and parts of Asia and the Pacific (Allen, 1985; Phấn et al ., 1999; Anderson and Allen, 2001; Newman, 2002; Andamari et al ., 2004; Fry et al ., 2009; Wibisono et al ., 2019; Rapi et al ., 2020). Total annual catches of Malabar blood snapper alone increased from 445 tons in 2000 to 1742 tons in 2019, according to the Food and Agriculture Organization of the United Nations (FAO, 2021).…”

“…Several studies have addressed basic life-history traits, age, growth, maturation and spawning of the Malabar blood snapper across southern, central and western parts of its range (Edwards, 1985; Newman et al ., 2000, 2002; Andamari et al ., 2004; Fry et al ., 2009; Fry and Milton, 2009; Masood and Farooq, 2011; Raeisi et al ., 2011; Mazumder et al ., 2016; Ernawati and Budiarti, 2019; Nurulludin et al ., 2019; Rapi et al ., 2019, 2020; Wibisono et al ., 2019; Ben-Hasan et al ., 2021). According to these studies, the life-history parameters of L. malabaricus may vary significantly, depending on the region.…”

Reproductive characteristics of malabar blood snapper \(\textit{Lutjanus malabaricus}\) (Bloch &Schneider, 1801) in coastal marine zone of Nghe An and Ha Tinh provinces, Vietnam

“…Some researchers claimed that "at geographically dispersed at latitudes of more than five degrees, there will be differences in size and age when fish reaches first gonad maturity level. In addition, the difference in size also occurs due to differences in ecological conditions of the waters" (Rapi et al, 2020).…”