GENETIC DIVERSITY OF MACKEREL SCADS, Decapterus macarellus  (Cuvier, 1833) IN THE INDIAN OCEAN

Zamroni, Achmad; Suwarso, Suwarso

doi:10.15578/ifrj.23.2.2017.89-96

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…Comparison of size ranges of mackerel scad caught in Dorery Bay based on the present research with several previous studies in variousl regions is presented in Table 1. It showed that the average length interval of D. macerellus was smaller than that taken in the Celebes Sea and also smaller than the size at first maturity (Lm), namely 26.89 cm [15].…”

Section: Fish Size Distributionmentioning

confidence: 89%

“…Other aspects related to the level of fish utilization have also been widely reported, with various approaches such as production models based on the fish catch [10,11] and based on the length of fish life [12,13]. Further, studies on stock identification are especially about morphometry, otolith measurements [14], and stock potential estimation [15].…”

Section: Introductionmentioning

confidence: 99%

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Size Distribution and Growth Pattern of Mackerel Scad (Decapterus Sp.) Caught by Boat Lift Nets in Doreri Bay Waters, Manokwari Regency, West Papua, Indonesia and Its Management Implications

Patty,

Bawole,

Sala

et al. 2023

AJARR

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Aims: The present study aims to explore some of biological characteristics of mackerel scad, such as size structures and length and weight relationship in which that information is important for the management of the fish resources. Place and Duration of Study: The data collection was conducted from April to June 2019 in the waters of Doreri Bay, Manokwari Regency. Methodology: The data were collected from 6 boat lift nets during their fishing operation, 7 days every month for 3 months of research. The data collected was the catch of mackerel scad fish and the size of total length and weight the individual fish samples. The data were then descriptively analyzed to explore the fish size structures. Simple regression analyses was used to estimate the length weight relationship (LWR) of fish. Results: The production of mackerel scad caught in the waters of Doreri Bay from April to June was around 68.5 tonnes which was dominated by the species Decapterus macerellus. The individual size structure of each species varies. D. macerellus has a size range of 17.8 cm to 25.7 cm, Decapterus macrosoma measures 10.5 cm to 12.7 cm, Decapterus akaadsi measures 7.9 cm to 19.0 cm, Decapterus kuroides measures 9.4 cm to 14.9 cm, and Decapterus scrombinus measures 10.3 cm to 18.0 cm. On average, the size of the individuals caught is smaller than the size at first smaturity (Lm). The growth pattern of mackerel scad fish varies between species. Fore example species D. macrosoma tend to follow a positive allometric growth pattern, while D akaadsi and D. macerellus tend to follow a negative allometric growth pattern. Conclusion: Mackerel scad caught on average were dominated by individuals with a size less than the size of the first maturity (Lm); Growth pattern of Mackerel scad varied among different species and among different months; and Mackerel scad fish caught using boat lift nets in Doreri Bay, Manokwari Regency need to be managed properly by considering the minimum legal sizes and the aspect of carrying capacity.

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Section: Fish Size Distributionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Size Distribution and Growth Pattern of Mackerel Scad (Decapterus Sp.) Caught by Boat Lift Nets in Doreri Bay Waters, Manokwari Regency, West Papua, Indonesia and Its Management Implications

Patty,

Bawole,

Sala

et al. 2023

AJARR

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Length-weight relationship, body condition, and fishing gear selectivity of shortfin scad (Decapterus macrosoma) landed in Banjarmasin fishing port, Indonesia

Ahmadi

2020

Fisheries &Amp; Aquatic Life

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The present study provides scientific information on the growth pattern and relative condition of shortfin scad, Decapterus macrosoma Bleeker landed in Banjarmasin fishing port, Indonesia. A total of 313 individual scad comprising 178 males and 135 females ranging from 152 to 225 mm total length and from 37 to 110 g weight were investigated. The body shape of both males and females showed isometric growth patterns indicating that all body dimensions grew at the same rate. The regression coefficient was significantly different between the sexes. The total length (TL), body weight (W), body depth (BD), W/TL, and BD/TL ratios and condition factors of the females were comparatively higher than those of males. The highest percentage of the catch was between 180 and 189 mm TL (32.59–40.45%) and 50 and 59 g W (20.65-21.79%). The relative condition factor values ranged from 0.799 to 1.433, which reflected the good condition of the fish samples. The estimated length at first capture (Lc50) and selection factor values were 180 mm and 3.54 for males and 185 mm and 3.64 for females. In the present work, the purse seine was considered to be a male-biased gear, with a sex ratio of 1.3 : 1. The outcomes of this research could be useful for sustainable pelagic fisheries management and for developing precautionary measures to prevent the overexploitation of this species.

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GENETIC DIVERSITY OF MACKEREL SCADS, Decapterus macarellus (Cuvier, 1833) IN THE INDIAN OCEAN

Cited by 2 publications

References 10 publications

Size Distribution and Growth Pattern of Mackerel Scad (Decapterus Sp.) Caught by Boat Lift Nets in Doreri Bay Waters, Manokwari Regency, West Papua, Indonesia and Its Management Implications

Size Distribution and Growth Pattern of Mackerel Scad (Decapterus Sp.) Caught by Boat Lift Nets in Doreri Bay Waters, Manokwari Regency, West Papua, Indonesia and Its Management Implications

Length-weight relationship, body condition, and fishing gear selectivity of shortfin scad (Decapterus macrosoma) landed in Banjarmasin fishing port, Indonesia

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