Ontogenetic shifts in home range size of a top predatory reef-associated fish (Caranx ignobilis): implications for conservation
| Autor: | John D. Filmalter, James S. E. Lea, Lauren R. Peel, Bruce Q. Mann, Christopher R. Clarke, Ryan Daly, Paul D. Cowley |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
geography geography.geographical_feature_category Ecology 010604 marine biology & hydrobiology Ontogeny Home range Aquatic Science Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Fishery Spatial management Caranx Fish Marine protected area Fisheries management Reef Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine Ecology Progress Series. 664:165-182 |
| ISSN: | 1616-1599 0171-8630 |
| DOI: | 10.3354/meps13654 |
| Popis: | Defining the home range of vulnerable species is critical for designing effective spatial management strategies. However, animal home ranges often change with ontogeny, and quantifying the associated temporal and spatial changes is particularly challenging for mobile marine species. Here, we investigated how the space use of a top predatory reef-associated fish (giant trevallyCaranx ignobilis) scales with body size. Fish were tagged with acoustic transmitters and passively tracked for >3 yr at a tropical island and atoll in the Republic of Seychelles. A sheltered atoll environment was critical for juvenile fish (100 cm FL) adult fish appeared to favour shallow coral reefs and associated reef drop offs whilst sharing a similar core home range location. Large adult fish utilized a greater diversity of habitat types and had significantly (p < 0.05) greater annual dispersal distances (mean = 35.29 km, max = 91.32 km) than small adults (mean = 13.72 km, max = 21.55 km). Additionally, the home range of large adults (mean = 209.74 km2) was significantly (p < 0.05) larger than that of juveniles (mean = 38.73 km2) and small adults (77.32 km2) and there was a significant (p = 0.02) relationship between fish length and home range size. Furthermore, tagged fish took up to 34 mo (mean = 18.54 mo) to utilize the full extent of their home range. The habitat shift and expansion in home range size throughout ontogeny should be taken into account when designing effective spatial management plans forC. ignobilis. |
| Databáze: | OpenAIRE |
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