Homing tactics of Weddell seals in the Antarctic fast-ice environment

Fuiman, Lee A.; Williams, Terrie M.; Davis, Randall W.

doi:10.1007/s00227-020-03730-w

Cited by 9 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fish larvae, due to weak swimming ability, are passively moved long distances horizontally, perhaps even for hundreds of kilometres [4,34], as a result of various environmental conditions. The space-time variability of oceanographic structures can influence the physiology and behaviour of ichthyoplankton, leading to variations in recruitment and survival [36]. The study of the relation between larvae abundance and environmental conditions gives the opportunity to identify suitable habitats and observe habitat shifts linked to anthropogenic activity that may influence the survival and recruitment of fish larvae [37][38][39].…”

Section: Discussionmentioning

confidence: 99%

Assemblage Structure of Ichthyoplankton Communities in the Southern Adriatic Sea (Eastern Mediterranean)

Bergamasco,

Minutoli,

Belmonte

et al. 2023

Biology

View full text Add to dashboard Cite

Studies based on fish early life stages can provide information on spawning grounds and nursery areas, helping to determine the implications for stock biomass fluctuations of recruitment variability. This study describes the composition, abundance, spatial distribution and differences in day/night vertical distribution of ichthyoplankton in the southern Adriatic Sea. Samples were collected within the framework of the COCONET project (Towards COast to COast NETworks of marine protected areas) from 9 to 18 May 2013 by the R/V Urania, using the electronic multinet EZ-NET BIONESS (Bedford Institute of Oceanography Net Environmental Sampling System). A total of 20 species, belonging to 20 genera and 13 families, were identified. Of the collected larvae, 74.3% were meso- or bathypelagic species, 24.7% were epipelagic and 0.9% were demersal. The community was dominated by Gonostomatidae, followed by Engraulidae, Myctophidae and Photychthaidae. The most abundant species was Cyclothone braueri (45.6%), followed by Engraulis encrasicolus, Ceratoscopelus maderensis, Cyclothone pygmaea, Vinciguerria attenuata and Myctophum punctatum. An inshore/offshore increasing gradient in biodiversity and abundance was observed. Different weighted mean depths (WMDs) were observed for larvae and juveniles. No diel vertical migrations were observed. The high abundance of meso- or bathypelagic species in the upper 100 m confirms the epipelagic zone as an important environment for the development of the larval stages of these fish.

show abstract

Section: Discussionmentioning

confidence: 99%

Assemblage Structure of Ichthyoplankton Communities in the Southern Adriatic Sea (Eastern Mediterranean)

Bergamasco,

Minutoli,

Belmonte

et al. 2023

Biology

View full text Add to dashboard Cite

show abstract

“…Weddell seals are notable divers, second only to southern elephant seals in the depth and duration of dives. These skills are critical for accessing and capturing prey, as well as navigating extensive crack systems in the sea ice to access haulout locations (Fuiman, Williams, & Davis, 2020;Stirling, 1969, Williams et al, 2004. The physiological development of swimming capabilities in this species, particularly that of the dive response, has been well-studied in adults (Burns, 1999;Burns & Castellini, 1998;Castellini, Kooyman, & Ponganis, 1992;Kooyman, Castellini, Davis, & Maue, 1983;Kooyman, 2013;Schreer & Testa 1996;Williams et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Weddell seals ( Leptonychotes weddellii ) differ from most other phocids in that offspring begin to enter the water during the first two weeks of life and continue to do so in the presence of attentive mothers throughout a relatively long period of dependency (Bowen, 1991; Burns 1997; Hill, 1987; Lindsey, 1937; Tedman & Bryden, 1979). Weddell seals are notable divers, and the development of these skills is critical for accessing and capturing prey as well as navigating crack systems in the sea ice to access haul‐out locations (Fuiman et al, 2020; Stirling, 1969, Williams et al, 2004). Weddell seal pups are born on stable sea ice and are typically safe from predation during lactation (Lindsey, 1937; Wilson, 1907).…”

Section: Introductionmentioning

confidence: 99%

Investigating diverse sources of variation in the amount of time Weddell seal (Leptonychotes weddellii) pups spend in the water during the lactation period

Petch

Rotella

Link

et al. 2022

Marine Mammal Science

View full text Add to dashboard Cite

dedication to my education. His mentorship has made me a better person, as well as a better scientist, and I am grateful for the experiences and tools he provided me with. I would also like to thank Dr. Robert Garrott for his mentorship as a member of my graduate committee. Bob was integral to the theoretical and technical basis of this research and continued to play an important role in the development of this manuscript and my own academic growth. I am inspired by the relentless commitment to excellence and drive to improve that both Jay and Bob demonstrated throughout my time with them on this project. I am thankful for committee member Dr. Andrea Litt, who has been a mentor and source of support throughout my years at Montana State and has played an outsized role in my academic career. Dr. William Link generously devoted a great deal of his time to assist us in refining our statistical analyses. I am thankful for his infectious love of mathematics and time spent graciously teaching me the Bayes way of thinking. Dr. Terrill Paterson assisted with particularly sticky code on numerous occasions, usually well past working hours. I am grateful for Kaitlin Macdonald's leadership, support, and technical expertise, both in the field and in the office. I am indebted to my partner, Emily, for her patience and encouragement, and am thankful for the unwavering support of my family and friends.

show abstract

“…Ainley et al unpublished data). All of these mesopredatorspenguins, seals and toothfish -acquire forage fish (silverfish) high in the water column (Fuiman et al 2002, Ballard et al 2012, Saenz et al 2020. However, although the presence of fewer large toothfish may have increased the prevalence of silverfish in the upper water column, the growth of competing seal numbers and their foraging may have countered this factor.…”

mentioning

confidence: 99%

Varying population size of the Cape Royds Adélie penguin colony, 1955–2020: a synthesis

Ainley,

Morandini,

Barton

et al. 2024

Antarctic Science

View full text Add to dashboard Cite

Among the longest Antarctic biological time series is that of Adélie penguin Pygoscelis adeliae population size at Cape Royds, 1955 to the present. Demographic trends over the 66 years fall into five periods: 1) decrease then recovery due to control of tourism from McMurdo Station/Scott Base; 2) further increase responding to the removal of > 20 000 trophically competing Antarctic minke whales Balaenoptera bonaerensis from the colony's wintering area; 3) stabilization but not decrease upon the ban of whaling in 1982, and whale recovery, owing to increased winds facilitating McMurdo Sound Polynya presence (easier ocean access during nesting); 4) decrease in 2001–2005 when two mega-icebergs, B15A/C16, opposed the wind effect by increasing sea-ice cover, thus limiting ocean access; and 5) after iceberg departure, minimal recovery due to the increased velocity of the wind-generated Ross Gyre reducing penguin breeding probability. A multivariant model using 1998–2018 data confirmed the roles of gyre speed (negative) and open water (positive) in colony growth. Additional negative influence came from high nest predation by south polar skuas Stercorarius maccormicki, reducing chick production, as well as perhaps increased trophic competition from nearby Weddell seals Leptonychotes weddellii. Clearly, long time series increase our understanding of penguin population dynamics responding to a complexity of factors.

show abstract

Homing tactics of Weddell seals in the Antarctic fast-ice environment

Cited by 9 publications

References 44 publications

Assemblage Structure of Ichthyoplankton Communities in the Southern Adriatic Sea (Eastern Mediterranean)

Assemblage Structure of Ichthyoplankton Communities in the Southern Adriatic Sea (Eastern Mediterranean)

Investigating diverse sources of variation in the amount of time Weddell seal (Leptonychotes weddellii) pups spend in the water during the lactation period

Varying population size of the Cape Royds Adélie penguin colony, 1955–2020: a synthesis

Contact Info

Product

Resources

About