A new central Brazilian genus and species of sigmodontine rodent (Sigmodontinae) transitional between akodonts and oryzomyines : with a discussion of muroid molar morphology and evolution / Philip Hershkovitz.

n.s. no.75(1993)

New or little known titanotheres from the lower Uintah formations, with notes on the stratigraphy and distribution of fossils / By Elmer S. Riggs -- Oliver Cummings Farrington --

v.4:no.2(1912)

Heteromyids from the Miocene and Lower Oligocene / by Paul O. McGrew --

v.8:no.9(1941)

A trematopsid skull from the Lower Permian, and analysis of some characters of the dissorophoid (Amphibia, Labyrinthodontia) otic notch / John R. Bolt.

v.30:no.3(1974)

The anthropology of Iraq. The Lower Euphrates-Tigris Region / by Henry Field, Formerly Curator of Physical Anthropology.

v.30:pt.1:no.2(1949)

Ingalik contact ecology : an ethnohistory of the lower-middle Yukon, James W. VanStone, Curator, North American Archaeology and Ethnology, Field Museum of Natural History.

v.71(1979)

Early cretaceous mammals and the evolution of mammalian molar teeth / Bryan Patterson --

v.13:no.1(1956)

Pachypleurosaurs (Reptilia: Sauropterygia) from the lower Muschelkalk, and a review of the Pachypleurosauroidea / Olivier Rieppel --, Lin Kebang --.

n.s. no.32(1995)

Internal structures of Cyclocrinites dactioloides : a receptaculitid alga from the Lower Silurian of Iowa / Matthew H. Nitecki -- and Markes E. Johnson --.

v.39:no.1(1978)

Zoisite from lower California / by Oliver Cummings Farrington --

v.3:no.4(1906)

Redescription of Ischadites elrodi (S. A. Miller, 1892) a Lower Devonian receptaculitid / [by] Matthew H. Nitecki --

v.20:no.5(1970)

Fish assemblages in two sandy beaches in lower Purus river, Amazonas, Brazil

Fish assemblages from two sandy beaches in the lower Purus river (Amazonas, Brazil) were compared. Four sampling groups were represented by: day and night samples in sandy beach inside the Reserva Biológica de Abufari (biological reserve) and day and night samples in the Reserva de Desenvolvimento Sustentável Piagaçu-Purus (sustainable development reserve). Samples were collected during low water levels (November) in 2007. The fish were sampled by means of seines with mesh size of 5 mm between opposing knots, 11 m long and 6 m wide. A total of 112 fish species belonging to nine orders and 27 families was captured. The vast majority of the dominant forms consisted of small fishes (< 100 mm SL) or juveniles. Samples collected in Abufari at night presented more specimens (3,540), higher richness (84 spp.), larger total biomass (76,614 g) and higher diversity (H'= 2.57) than the other groups. The composition of fish assemblages was significantly different among all analyzed groups (ANOSIM, p < 0.0001, R= 0.71). NMDS analysis also clustered all species in four distinct groups according to species composition per period and site. SIMPER analyses showed that 80% of variation of species composition among the groups examined was due to 12 species. However, fish composition did not show any correlation with the abiotic factors examined. Different levels of use in both reserves may explain differences in fish composition.

An ecological and comparative analysis of parasites in juvenile Mugil liza (Pisces, Mugilidae) from two sites in Samborombón bay, Argentina

ABSTRACT Mugil liza Valenciennes, 1836 is an economically important food fish and has been recommended for aquaculture in South America. A total of 278 fishes were collected in the spring and summer of 2009 and 2010. These fish were sorted into sample groups according to their size class. We used Bayesian statistics and 95% credible intervals for each parameter tested were calculated. Fish studied harbored a total of 15 different species of parasites. Diversity of parasite species found on Mugil liza was greatest at the S.R.C. collection site, but evidenced a lower species richness than at A.R. site. The 1st size fishes of both sites evidenced greater parasite diversity than either 2nd or 3rd size fish. Differences observed could be explained by the different use of habitat types at the two sites or differential susceptibility to infection by parasites. The dominance of D. fastigatainfluenced observed results of lower community diversity indexes. New works elucidating different parasite life cycles within juvenile and adults ofM. liza in Argentina, promise to be important for determining the risk of the parasitism by zoonotic metacercariae A. (P.) longa and use of this fish as food and an economic resource, and the possible use of mullet parasites in other promising fields as indicators of biodiversity, and/ or water contamination.

Growth of positive words and lower bounds of the growth rate for Thompson's group (F)p

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