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In Chile there is an increased use of fungicides, especially in the central and southern parts of the country. The aim of this study was to test the sensitivity of two common zooplankton species, Daphnia pulex Leydig, 1860 and Tumeodiaptomus diabolicus (Brehm, 1935) to the fungicide carbendazim. The specimens came from Lake Calafquén (southern Chile), and were subjected to bioassay experiments under laboratory conditions over 48 h to seven carbendazim concentrations (0-77.70 μg/l); these bioassays were performed using adult specimens. In parallel, also literature information on the commonly used D. magna Straus, 1820, was used. It was found that T. diabolicus had a 48-h LC50 of 28.1 μg/l, while D. pulex had a 48-h LC50 of 26.1 μg/l, and finally D. magna has a 48-h LC50 of 136.1 μg/l. These results indicate that the two native zooplankton species of Chilean Patagonian lakes are considerably more sensitive to the pesticide carbendazim, than the species D. magna that is used as a standard.

In: Crustaceana
In: Crustaceana
In: Crustaceana
In: Axioidea of the World and a Reconsideration of the Callianassoidea (Decapoda, Thalassinidea, Callianassida)
In: Axioidea of the World and a Reconsideration of the Callianassoidea (Decapoda, Thalassinidea, Callianassida)
In: Crustaceana

Abstract

Two additional deep-sea pontoniine shrimps are reported from Taiwan and Dongsha (= Pratas). Periclimenes ngi Li, Mitsuhashi & Chan, 2008, originally only known from the Philippines, is a new record for Taiwan. The other species collected from Dongsha is new to science and although very similar to P. ngi, differs in the first pereiopod with the carpus being as long as the merus, the third pereiopod having a stouter propodus and a proportionately shorter accessory tooth of the dactylus, as well as its distinctive colouration in life.

In: Studies on Eumalacostraca: a homage to Masatsune Takeda