Monsoonal wet season influences the migration tendency of a catadromous fish (barramundi Lates calcarifer) DOI Creative Commons
Brien H. Roberts, John R. Morrongiello, David L. Morgan

et al.

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 93(1), P. 83 - 94

Published: Nov. 20, 2023

Abstract Many animals exhibit partial migration, which occurs when populations contain coexisting contingents of migratory and resident individuals. This individual‐level variation in migration behaviour may drive differences growth, age at maturity survival. Therefore, is widely considered to play a key role shaping population demography. Otolith chemistry microstructural analysis were used identify the environmental‐ individual‐specific factors that influence facultatively catadromous barramundi ( Lates calcarifer ) two distinct life history stages: firstly, as juveniles migrating upstream into fresh water; secondly, adults or sub‐adults returning estuarine/marine spawning habitat. Monsoonal climate played an important determining propensity juveniles: individuals born driest year examined (weak monsoon) more than twice likely undergo freshwater those wettest (strong year. In contrast, ontogenetic timing return migrations estuary by was highly variable not strongly associated with environmental parameters examined. We propose scarce resources within saline natal habitats during lower rainfall years provide ecological incentive for migrate upstream, whereas abundant higher promote histories estuaries. conclude inter‐annual climatic variation, here evidenced monsoonal strength, plays driving persistence diversified wild populations.

Language: Английский

Severe decline in extent and seasonality of the Mekong plume after 2000 DOI

Yikang Feng,

Edward Park, Jingyu Wang

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132026 - 132026

Published: Sept. 1, 2024

Language: Английский

Citations

1
Environmental drivers of fish population dynamics in an estuarine ecosystem of south‐eastern Australia DOI
Gregory P. Jenkins, Rhys A. Coleman, Joshua S. Barrow

et al.

Fisheries Management and Ecology, Journal Year: 2022, Volume and Issue: 29(5), P. 693 - 707

Published: May 30, 2022

Abstract Estuaries are dynamic environments and often support rich biodiversity important fisheries. Linking environmental drivers or events to observed biological changes in these systems provides critical information that can facilitate their management. Historical fish fisheries data for Western Port, a large embayment south‐east Australia supports biodiversity, were collated, including catch records, recruitment indices two novel growth time series. Dynamic factor analysis (DFA) identified three common patterns associated with the time‐series data, which turn related both local regional drivers. On scale, nitrogen loads chlorophyll concentration affected metrics, potentially through food web via seagrass habitat. offshore sea surface temperature Bass Strait was important. Step (change points) predominantly significant El Niño La Niña and, lesser extent, pulses cessation of commercial netting.

Language: Английский

Citations

6
River mouth morphodynamics and deflection over the short term: effects on spit growth and mangrove dynamics DOI Creative Commons
Temitope D. Timothy Oyedotun,

Gordon Ansel Nedd

Frontiers in Environmental Science, Journal Year: 2023, Volume and Issue: 11

Published: May 18, 2023

The river mouth shows the influence of dynamics sediment deposition and processes organising deposits. mouths Guyana coast, as with other coastal systems in Guianas, are influenced by mud banks from Amazon River rivers. This study analysed probed riverine marine influences on small morphological developments. In this study, system were carried out satellite images through comparison inter-annual morphodynamics mouths, complemented data hydrodynamic among others. demonstrates that recent advancement availability Synthetic Aperture Radar (SAR), remotely sensed data, allow for classification migrating action processes; effective monitoring mudflats development spit formation; and, exhibition transitioning infilling. Sentinel-1 Mahaica-Mahaicony processed using Google Earth Engine (GEE) ArcGIS to observe its effects deflecting mouth, influencing mangrove dynamics. results analyses show shoal governed feedback various estuarine resulting interactions between ocean. have not only highlighted importance infilling build-up river-mouth deflection but impact ecosystem (mangrove) associated mouth.

Language: Английский

Citations

3
River-to-sea ecosystem management DOI
Thiago B. A. Couto, Suresh A. Sethi

Nature Sustainability, Journal Year: 2023, Volume and Issue: 7(1), P. 4 - 6

Published: Nov. 2, 2023

Language: Английский

Citations

3
Monsoonal wet season influences the migration tendency of a catadromous fish (barramundi Lates calcarifer) DOI Creative Commons
Brien H. Roberts, John R. Morrongiello, David L. Morgan

et al.

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 93(1), P. 83 - 94

Published: Nov. 20, 2023

Abstract Many animals exhibit partial migration, which occurs when populations contain coexisting contingents of migratory and resident individuals. This individual‐level variation in migration behaviour may drive differences growth, age at maturity survival. Therefore, is widely considered to play a key role shaping population demography. Otolith chemistry microstructural analysis were used identify the environmental‐ individual‐specific factors that influence facultatively catadromous barramundi ( Lates calcarifer ) two distinct life history stages: firstly, as juveniles migrating upstream into fresh water; secondly, adults or sub‐adults returning estuarine/marine spawning habitat. Monsoonal climate played an important determining propensity juveniles: individuals born driest year examined (weak monsoon) more than twice likely undergo freshwater those wettest (strong year. In contrast, ontogenetic timing return migrations estuary by was highly variable not strongly associated with environmental parameters examined. We propose scarce resources within saline natal habitats during lower rainfall years provide ecological incentive for migrate upstream, whereas abundant higher promote histories estuaries. conclude inter‐annual climatic variation, here evidenced monsoonal strength, plays driving persistence diversified wild populations.

Language: Английский

Citations

3