Catch and Relative Abundance of Some Sharks Landing in Tanjung in Luar, Lombok

Sentosa, Agus Arifin; Dharmadi, Dharmadi

doi:10.14203/widyariset.3.2.2017.131-142

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…The ichthyo-fauna in Batur Lake is classified into five native species and seven alien species. According to the research in 2011, there were 12 introduced fish species found in Batur Lake [2]. Compared with this research, there has been a decrease in the number of alien species in Batur Lake.…”

Section: Ichthyofaunamentioning

confidence: 57%

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Ichthyo-diversity of Batur Lake, Bali: A preliminary study

Syah,

Pertami,

Perwira

et al. 2023

E3S Web Conf.

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Batur Lake is the largest lake on Bali Island. Batur Lake has various potential fish resources. This study aims to determine the diversity of fish in Batur Lake waters. The research was conducted from November to December 2021. The method used in this research is the purposive sampling method. Using experimental gill nets, the samples were collected at the three stations covering Toya Bungkah, Seked, and Kedisan waters. The results showed that 516 individual fish comprised native and alien species. Native species were Osteochilus vittatus, Barbodes binotatus, Barbonymus gonionotus, Barbonymus balleroides, and Rasbora lateristriata; the others were alien species (7 species). Furthermore, based on the literature study, one of the native species that was collected is included in the IUCN red list with a vulnerable (VU) status, namely Rasbora lateristriata. Ichthyofauna in Batur Lake consisted of four orders, four families, and 12 species from native and alien species. The dominant species collected was alien species (Amphilophus citrinellus and Xiphophorus hellerii), while the one native species was Barbonymus balleroides. The highest values of diversity and uniformity indexes were found in Seked and Kedisan waters; meanwhile, the highest dominance index was found in Toya Bungkah waters.

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Section: Ichthyofaunamentioning

confidence: 57%

“…), Spotted barb (Pontius binotatus), Red Tilapia (Oreochromis sp. ), Milkfish (Chanos chanos), Asian swamp eel (Monopterus albus), Three spot cichlid (Amphilophus sp.1), and Midas cichlid (Amphilophus sp.2) [2]. Only one native fish species was collected, i.e., Rasbora lateristriata.…”

Section: Introductionmentioning

confidence: 99%

Ichthyo-diversity of Batur Lake, Bali: A preliminary study

Syah,

Pertami,

Perwira

et al. 2023

E3S Web Conf.

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“…Since then, they have been found in natural freshwater in Indonesia, notably in Lake Sentani in Papua New Guinea, which significantly threatens the lake's fish biodiversity (Ohee et al, 2018). Sentosa and Wijaya (2013) were the first to report the presence of a Midas cichlid in Lake Batur, the largest lake on Bali Island, Indonesia. At the time, the Midas cichlid population was only 0.4% of the total fish population compared to 63% of the other non-native species, Nile tilapia.…”

Section: Introductionmentioning

confidence: 99%

Ecophenotypic Variation of Midas Cichlid, Amphilophus citrinellus (Gunther, 1864), in Lake Batur, Bali, Indonesia

Gustiano,

Haryani,

Aisyah

et al. 2024

Braz. J. Biol.

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Cichlid fishes exhibit rapid adaptive radiations with significant diversification rates in response to ecological variability, i.e., ecological opportunity or geographical isolation. The discovery of a Midas cichlid species in Lake Batur, Indonesia's largest volcanic lake, first reported in 2013, could represent such adaptations. Midas cichlids can now be found in a range of habitats in Lake Batur and dominate the lake's fish population by up to 60%. This study aimed to identify the interaction between habitat, water quality, and Midas cichlid in Lake Batur, facilitating morphometric variances in the fish populations. The fish were captured at five locations in Lake Batur using fishing rods, community nets with mesh sizes of 2–3 inches, experimental gillnets with mesh sizes of 1 inch, and fish scoops in floating net cages during August and November 2022. There were 46 fish samples caught from the five stations, all photographed using a digital camera and later measured using the ZEN 2012 software. The fish measurement employed a truss morphometric method using 21 distinct morphometric body features. Canonical analysis was used to determine the distribution of characteristics, while discriminant analysis was used to examine the closeness of association. The measured water quality parameters included pH, DO, temperature, conductivity, and TDS for in-situ and TSS, TP, TN, and chlorophyll A for ex-situ. The findings revealed morphometric changes among Midas cichlid species in Lake Batur caused by habitat and water quality differences. The distinction can be detected in the anterior and posterior bodies (C1, B1, C3, C6, C5, B3 and B4). Temperature and aquatic plants, Azolla pinnata, may detect the station and shape of fish in Lake Batur. Body shape cannot be identified by chlorophyll A, TN, DO, and TDS. Future genetic research could answer why fish groups with varied body types coexist in the same location.

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“…As one of the most common shark species in Indonesian waters, the silky shark dominated the total sharks landed in Tanjung Luar by contributing about 43% in 2012 [15], and more than 30% from 2014 to 2016 [16,17]. While in Cilacap, silky sharks contributed between 3% and 18% of the total shark catches in the tuna longline and gillnet fisheries from 2006 to 2013 [15].…”

Section: Introductionmentioning

confidence: 99%

Increasing Abundance of Silky Sharks in the Eastern Indian Ocean: Good News or a Reason to be Cautious?

Simeon

Muttaqin

Mardhiah

et al. 2018

Fishes

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The silky shark (Carcharhinus falciformis) is the most common shark landed in Indonesian waters, including in the Indian Ocean. However, even though they are frequently caught, there is a lack of information on the population and abundance of silky sharks in the Indian Ocean. Cilacap and Tanjung Luar are two of Indonesia’s shark fishery hotspots, both located on the edge of the Indian Ocean, which is a part of the Indonesian Fisheries Management Area (FMA) 573. The fishers from both places usually have fishing grounds in that particular fisheries management area. This research aims to update the abundance, and to investigate the factors, which influence catches of silky shark in the FMA 573 based on monthly enumeration during 2015–2016. This study found that standardized catch-per-unit-effort (CPUE) or abundance indices of silky shark in the Indonesian FMA 573 increased from 2015 to 2016. We suggested that fish immigration and decreasing fishing pressure may affect the fish abundance. Fisheries management is required to regulate the fishing pressure, such as controlling the number of boats/licenses and the number of trips or fishing gear, as well as initializing spatial and temporal fishing closure.

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Catch and Relative Abundance of Some Sharks Landing in Tanjung in Luar, Lombok

Abstract: Article history

Cited by 5 publications

References 6 publications

Ichthyo-diversity of Batur Lake, Bali: A preliminary study

Ichthyo-diversity of Batur Lake, Bali: A preliminary study

Ecophenotypic Variation of Midas Cichlid, Amphilophus citrinellus (Gunther, 1864), in Lake Batur, Bali, Indonesia

Increasing Abundance of Silky Sharks in the Eastern Indian Ocean: Good News or a Reason to be Cautious?

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