Possible impact of El Niño and La Niña on water mass circulation in Ambon Bay

Saputra, Frilla Renty Tama; Putri, Mutiara Rachmat; Tattipata, W. J.

doi:10.1088/1755-1315/184/1/012012

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Stratifikasi kolom air di Teluk Ambon terjadi akibat adanya masukan air hujan dan air sungai terjadi pada musim peralihan (Pello, Adiwilaga, Huliselan, & Damar, 2014). Suhu di Teluk Ambon mengalami stratifikasi kolom air akibat difusi bahang dari permukaan (F R T Saputra, Putri, & Tattipata, 2018).…”

Section: Pendahuluanunclassified

“…Arus di Teluk Ambon dipengaruhi oleh arus kiriman dari Laut Banda dengan kecepatan 11,02 -11,73 cm/detik pada ambang dan arus di TAD bernilai 3,58 cm/detik (Christina & Putuhena, 2009). Arus di Teluk Ambon memiliki pola yang berbeda pada permukaan dan di kedalaman tertentu yang dipengaruhi oleh angin, kecepatan arus maksimum yang keluar dari TAD menuju TAL dengan nilai 0,4 m/s (F R T Saputra et al, 2018).…”

Section: Pendahuluanunclassified

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Karakteristik Fisis Teluk Ambon Menggunakan Pemodelan Hidrodinamika 3 Dimensi

Sabrina

2023

methoda

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Outer Ambon Bay (TAL) and Inner Ambon Bay (TAD) are part of Ambon Bay, which are semi-enclosed waters bounded by a narrow threshold. The characteristics of TAL are strongly influenced by the condition of the Banda Sea waters. Physical characteristics in the Banda Sea are influenced by the phenomenon of upwelling during the southeast season which brings water masses with high salinity and low temperature into the TAL. The condition of Ambon Bay is also influenced by the density gradient and tidal upwelling phenomenon. A 3-dimensional hydrodynamic modeling simulation was conducted to see the tidal upwelling phenomenon that affects the physical dynamics in Ambon Bay. The model simulation time was adjusted to the southeast season, namely June 1 - October 31, 2015. Comparison of simulated tidal elevation values with observation data showed a Root Mean Square Error (RMSE) value of 0.11 m with a correlation coefficient of 94.3%. The distribution of water temperature from the model simulation shows the same value as the satellite image data, which is 26°C.

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Section: Pendahuluanunclassified

Karakteristik Fisis Teluk Ambon Menggunakan Pemodelan Hidrodinamika 3 Dimensi

Sabrina

2023

methoda

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“…The monthly SST anomaly between 5 • N and 5 • S and 120 • E-170 • W indicated that strong La Niña event happened in 2007, while strong El Niño event happened in 2015 during the main fishing seasons for O. bartramii (Figure 1; Li et al, 2020). Saputra et al (2018) insisted that La Niña and El Niño events can also affect deep-water temperature in the Pacific Ocean. Due to frequent diel vertical migration for O. bartramii (Murata and Nakamura, 1998), deep-water temperatures should play an important role in gathering O. bartramii to format fishing grounds (Yatsu and Watanaba, 1996).…”

Section: Introductionmentioning

confidence: 98%

Water Temperature at Different Depths Affects the Distribution of Neon Flying Squid (Ommastrephes bartramii) in the Northwest Pacific Ocean

Wang

Cheng

et al. 2022

Front. Mar. Sci.

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Ommastrephes bartramii can vertically swim during its life, and previous studies have suggested the need to account for preferred habitat distribution influenced by water temperatures at different depths. To explore the impacts of deep-water temperature on O. bartramii spatial distribution, we constructed generalized additive models (GAMs) based on the Chinese squid-jigging fishery data and the Argo deep water temperature data during 2005–2018 in the Northwest Pacific Ocean to analyze the relationships between the local abundance of O. bartramii and deep-water temperatures. The results showed that the variables including surface water temperature (T0), water temperature at 30- and 100-m depths (T30 and T100), and water differences between T0 and T30 (D0–30) significantly affected the spatial distribution of O. bartramii. The suitable ranges of each variable are different, > 15.5°C for T0, 11–18°C for T30, < 6°C for T100, and 4–4.5°C for D0–30. The areas occupied by the suitable T30 seemed to reflect the outline of fishing ground, whereas the areas with suitable T100 were to indicate the high density of O. bartramii. The predicted suitable habitat area and high-density area for O. bartramii are also regulated by El Niño–Southern Oscillation (ENSO) events. We demonstrated how the estimates of O. bartramii spatial distribution would vary influenced by deep-water temperatures in the Northwest Pacific Ocean. This information may help develop an appropriate method for investigating the effects of deep-water temperature on species with vertical migration.

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Comparatively poorer body condition of south-east Indian Ocean pygmy blue whales on their southern migration

Russell,

Jolliffe,

Elsdon

et al. 2024

Aust. Mammal.

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The south-east Indian Ocean population of pygmy blue whales (Balaenoptera musculus brevicauda) forages in habitats between temperate foraging grounds off southern Australia and breeding grounds in Indonesian waters. With the opportunity to forage during migration, limited seasonal variation in body condition would be expected. However, increasing numbers of individuals in poor body condition with prominent spinal columns and other features of emaciation have been sighted during their southern migration. This study aimed to measure the morphology and body condition (relative body volume to body length) of pygmy blue whales during their northbound and southbound migration. Unmanned aerial vehicles were used to obtain images of 42 pygmy blue whales (one calf, five juveniles and 36 adults, including one lactating female) in 2021 and 2022. The body lengths ranged from 15.32 to 24.32 m, and the mean relative head length, length to blowhole, width of eyes, fluke width and length of peduncle were 21.8, 18.1, 12.8, 22.9 and 21.3% respectively. There was a significant decrease in body condition of 15.3% between north and southern migrating adult whales. Given the importance of body condition for reproductive success, understanding if this loss is due to natural seasonal variation, or habitat or prey disturbance from environmental environmental or anthropogenic sources, has implications for the future management of the species.

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Possible impact of El Niño and La Niña on water mass circulation in Ambon Bay

Cited by 5 publications

References 13 publications

Karakteristik Fisis Teluk Ambon Menggunakan Pemodelan Hidrodinamika 3 Dimensi

Karakteristik Fisis Teluk Ambon Menggunakan Pemodelan Hidrodinamika 3 Dimensi

Water Temperature at Different Depths Affects the Distribution of Neon Flying Squid (Ommastrephes bartramii) in the Northwest Pacific Ocean

Comparatively poorer body condition of south-east Indian Ocean pygmy blue whales on their southern migration

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