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1. Digestive Efficiency of Indigenous and Invasive Avian Species Fed Fruit of Invasive Alien Plants in South Africa

Author:
Thabethe, Vuyisile; Wilson, Amy-Leigh; Hart, Lorinda A; Downs, Colleen T
Source:
African zoology 2015 v.50 no.4 pp. 293-297
ISSN:
1562-7020
Subject:
Cinnamomum camphora; Morus alba; Psidium guajava; Psittacula; Solanum mauritianum; Tauraco; diet; energy; energy requirements; frugivores; fruits; indigenous species; introduced plants; invasive species; parakeets; South Africa
Abstract:
... Many highly invasive plant species produce fleshy fruit that are consumed and dispersed by frugivorous birds. However, little is known about assimilation efficiency of invasive fruit by indigenous and invasive avian species. We investigated whether indigenous Knysna (Tauraco corythaix) and Purple-crested (Gallirex porphyreolophus) Turacos and invasive alien Rose-ringed Parakeets (Psittacula kramer ...
DOI:
10.1080/15627020.2015.1106924

2. Trophic Relationships of Hake (Merluccius capensis and M. paradoxus) and Sharks (Centrophorus squamosus, Deania calcea and D. profundorum) in the Northern (Namibia) Benguela Current region

Author:
Iitembu, Johannes A; Richoux, Nicole B
Source:
African zoology 2015 v.50 no.4 pp. 273-279
ISSN:
1562-7020
Subject:
Centrophorus; Deania; Merluccius capensis; carbon; carbon sinks; diet; hake; muscle tissues; niches; nitrogen; sharks; stable isotopes; trophic relationships; Namibia
Abstract:
... The trophic relationships of two hake species (Merluccius capensis and M. paradoxus) and three shark species (Centrophorus squamosus, Deania calcea and D. profundorum) were investigated using nitrogen and carbon stable isotope signatures (δ¹⁵N and δ¹³C) of their muscle tissues. The sharks were more enriched in ¹⁵N than the hake, an indication of the apex predator status of sharks. Among the sharks ...
DOI:
10.1080/15627020.2015.1079142