2024 The krill surplus hypothesis

The krill surplus hypothesis

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August undefined, 2024

Webhave produced a massive surplus of Antarctic krill. This excess of krill may have allowed populations of other predators, such as seals and penguins, to increase, a top-down … WebRecent external collaboration on country/territory level. Dive into details by clicking on the dots or Select a country/territory from the list

[PDF] Abrupt recent shift in δ13C and δ15N values in Adélie …

Web17 Dec 2014 · The krill populations within the Southern Ocean are dependent on surface productivity, which may have been reduced because of decreased iron bioavailability … WebThe fin whales fed mostly on Antarctic krill (Euphausia superba) in the research area. The daily prey consumption by fin ... which are important components of the ecosystem, resulted in a substantial surplus of krill (Krill surplus hypothesis; e.g. Laws, 1977). The catches of humpback, blue and fin whales were banned in 1963, 1964 and 1976, data insecure di indonesia

Effects of Whaling on the Structure of the Southern Ocean Food Web

WebThe ‘krill surplus’ hypothesis was ﬁrst proposed by Sladen (1964) and expanded upon by Laws (1977, 1985) to explain increases in Antarctica penguin populations in the 1960s as … WebThe output of the Ecosim scenarios indicated that while the “krill surplus” hypothesis is a plausible explanation of the biomass trends observed in some penguin and pinniped species in the mid-20th century, the excess krill biomass was most likely eliminated by a rapid decline in primary productivity in the years 1975–1995. Web30 Sep 2013 · This is consistent with the observations by Emslie & Patterson (2007) 15, which supports the ‘krill surplus’ hypothesis, i.e., the higher krill abundance is likely due to … martinelli supermercati villafranca di verona

Baleen whale prey consumption based on high-resolution …

Paradigm misplaced? Antarctic marine ecosystems are

WebSevere declines in megafauna worldwide illuminate the role of top predators in ecosystem structure. In the Antarctic, the Krill Surplus Hypothesis posits that the killing of more than 2 million large whales led to competitive release for smaller krill-eating species like the Antarctic minke whale. Web14 Jan 2010 · This "Krill Surplus Hypothesis" postulates that the killing of some two million whales in the Southern Ocean during the early- and mid-20th century resulted in an … martinelli supermercati volta mantovanaWeb20 Mar 2013 · The ‘krill surplus’ hypothesis was first proposed by Sladen ( 1964) and expanded upon by Laws ( 1977, 1985) to explain increases in Antarctica penguin … data in russo

"WebThe increased krill availability in the middle of the past century as a result of the heavy harvesting of the larger baleen whale species could have been translated into better nutritional conditions for the Antarctic minke whale, resulting in a decreasing trend in the age at sexual maturity and an increasing trend in recruitment rate and hence … " - The krill surplus hypothesis

The krill surplus hypothesis

Stable isotope analysis of ancient and modern gentoo penguin …

Webkrill noun ˈkril : planktonic crustaceans and their larvae (order or suborder Euphausiacea and especially genus Euphausia) that constitute the principal food of baleen whales Example Sentences Recent Examples on the Web For instance, smaller penguins consume krill and squid, while larger species eat fish. Web60 often referred to as the „Krill Surplus Hypothesis.‟ However, krill populations in the 61 Southern Ocean are currently thought to be regulated by recruitment, which is positively 62 correlated with sea ice cover (Loeb et al. 1997; Nicol et al. 2000) – a bottom-up 63 explanation that has profound implications for krill and krill ...

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Web3 Nov 2024 · The annual krill surplus resulting from whale removal (that is, ... the ‘krill-surplus hypothesis’) 35. Instead, the opposite has happened (that is, the ‘krill paradox’). Web13 Jan 2010 · This "Krill Surplus Hypothesis" postulates that the killing of some two million whales in the Southern Ocean during the early- and mid-20th century resulted in an …

WebDr Colin Southwell: BSc (Hons), PhD. Research interests. I have been working with the Australian Antarctic Division since 1994. My primary research interests lie in providing scientific input to sustainable management of populations and ecosystems; the development of cost-effective methods for large-scale monitoring of wildlife populations; … WebThe Importance of Krill Predation in the Southern Ocean Philip N. Trathan and Simeon L. Hill Abstract Antarctic krill is a major prey species for a diverse array of Southern Ocean …

WebThe aim of the present study was to examine the ecological plausibility of the ‘‘krill surplus’’ hypothesis and the effect of the depletion of rorqual populations on the Southern Ocean food web using an ocean-scale ecosystem model. WebIn line with the krill surplus hypothesis, we further hypothesised that competitive prey release due to the harvesting of the whales may have facilitated the demographic recovery of the South Georgia population and allowed it to attain a larger size than was present before sealing. 2. Materials and Methods 2.1.

WebThis proposal became known as the ‘krill surplus hypothesis’ and strongly influenced thinking on the krill-based ecosystem in the Southern Ocean. One prediction of the krill surplus hypothesis has been that the excess krill has allowed other populations of krill …

Web22 Oct 2015 · “Prior to current sustainable fishing practices, the harvesting of baleen whales, krill and fish across East Antarctic waters through the 20th century could have reduced competition between Adélie penguins and other predators for … martinelli tallasWeb25 Mar 2024 · We also note that krill consumption by recovering populations of krill predators provides further evidence in support of the krill surplus hypothesis, and … martinelli suspensionWeb17 Dec 2014 · Abstract. The aim of this study was to examine the ecological plausibility of the "krill surplus" hypothesis and the effects of whaling on the Southern Ocean food web … martinelli telefonoWebFurthermore, the 'krill surplus' hypothesis was already known to us since it had been proposed by other scientists in the 1980s. Some counter-arguments have been raised as … martinelli telefoneWeb14 Jan 2010 · Almost a year ago, we discussed briefly the Krill Surplus Hypothesis. In this model, the removal of large baleen whales created a competitive release for Minke … martinelli tackle on trenthttp://people.uncw.edu/emslies/documents/Emslieetal.2013SIAGentooeggmembrane.pdf martinelli tablesWeb2 Dec 2024 · To test the krill surplus hypothesis and shed light on species-specific responses to recent environmental stressors in the Southern Ocean, this study compares … data insert in laravel